|Publication number||USRE35238 E|
|Application number||US 08/388,168|
|Publication date||May 14, 1996|
|Filing date||Feb 10, 1995|
|Priority date||May 21, 1990|
|Publication number||08388168, 388168, US RE35238 E, US RE35238E, US-E-RE35238, USRE35238 E, USRE35238E|
|Inventors||Kenneth L. Pope|
|Original Assignee||Gilbarco, Inc.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (65), Non-Patent Citations (5), Referenced by (93), Classifications (8), Legal Events (4)|
|External Links: USPTO, USPTO Assignment, Espacenet|
.Iadd.This is a continuation of application Ser. No. 07/968,449, filed Oct. 29, 1992, now abandoned. .Iaddend.
U.S patent application entitled "Vapor Recovery System For Fuel Dispenser" fled on Dec. 4, 1989, the name of Roger W. Furrow and Kenneth L. Pope, and bearing Ser. No. 07/445,384.
The field of the present invention relates generally to fuel dispensers, and more particularly to vapor recovery systems for use when dispensing a volatile fuel such as gasoline.
In fuel dispensing systems, such as these used for delivering gasoline to the fuel tank of a vehicle, environmental protection laws require that vapors emitted from the tank during the fuel dispensing process be recovered. Fuel is customarily delivered through a nozzle via a fuel hose and vapors are recovered from the nozzle via a vapor hose that conveys the vapor to the main supply tank from whence the fuel came. In what is referred to as a balanced system, the vapon are forced through the vapor hose by the positive pressure created in the vehicle tank as the fuel enters it. In other systems the vapor is sucked from the vehicle tank by a vapor recovery means connected to the vapor hose and forced into the supply tank.
In some systems, such as that described in the U.S. Pat. No. 4,223,706 to McGahey, mechanical means are used for controlling the relative volumetric flows of the fuel delivered to a nozzle by a fuel delivery means and of the vapor recovered by the suction of a vapor recovery means. In McGahey, the liquid fuel flow itself is used to drive a vapor pump. This usually causes a reduction in the fuel delivery rate which is inconvenient for the user. In U.S. Pat. No. 3,826,291 to Steffens, the vapor pump is calibrated so as to move a volume of vapor essentially equal to the volume of liquid flowing through the meter which measures the flow of fuel.
Unfortunately, these and other systems using mechanical controls generally cannot be adjusted so as to adapt to changing environmental conditions such as changes in temperature and/or to changes in operation. It is also difficult for such systems to accommodate additional controls or features, some of which may not even be known at the time of their manufacture.
In accordance with this invention, the volumetric flow of a vapor recovery means is controlled by programmed micropressor means. Electrical signals are derived that are related in a known way to the volumetric flow of the fuel delivery means and applied to a microprocessor. The microprocessor then determines on the basis of information stored therein the parameters of an electrical signal that can be applied to the vapor recovery means so as to make it have a desired volumetric flow. The volumetric vapor flow can be controlled by adjusting the speed of the motor for the recovery pump contained in the vapor recovery means, by changing its displacement or by controlling the position of a valve or damper in response to the signal from the microprocessor.
If, in accordance with an aspect of this invention, a stepping motor drives the pump for the vapor recovery means, the microprocessor controls the repetition rate of the drive pulses supplied to the stepping motor so as to cause the recovery pump to have the desired volumetric flow. If a different recovery pump or motor is used that requires drive pulses having a different repetition frequency to produce the desired volumetric flow, it is only necessary to make a slight change in the program controlling the microprocessor.
Whereas the volumetric flow of the vapor recovery means may be set equal to the volumetric flow of the fuel delivery means, there are some conditions such as a difference in the temperature of the fuel in the vehicle tank and fuel from the supply tank under which it is desirable to use a volumetric vapor flow that is different from the volumetric fuel flow. In accordance with another aspect of .[.their.]. .Iadd.this .Iaddend.invention, therefore, an indication is derived as to the volumetric vapor flow, and the microprocessor compares this indication with a value of vapor flow that is normally expected and makes the required adjustment.
In one embodiment, a transducer generates an electrical signal correspondling to the hydraulic pressure at the inlet side of the pump for the vapor recovery means. Under average conditions, the pressure will have a desired nominal value. When it is less than this value, the nominal pressure is restored by decreasing the volumetric flow of the vapor recovery means, and when it is greater than this value, nominal pressure is restored by increasing the volumetric flow of the vapor recovery means. The microprocessor is programmed to respond to the signal representing the pressure and provide signals for controlling the volumetric flow of the vapor recovery means. This is particularly easy to do if, in accordance with this invention, the motor driving the recovery pump is of the stepping type because it is driven at a speed determined by the repetition rate of drive pulses, and this can be easily changed.
Vapor recovery systems constructed as briefly described above permit the attainment of faster fuel delivery and greater efficiency, and make it easier to handle the hose. Furthermore, expensive vapor processing units, which are required when the vapor and liquid volumetric flow rates are not the same are not required.
Various preferred embodiments of the present invention will be described below with reference to the accompanying drawings in which like items are indicated by the same reference designations, and in which:
FIG. 1 is a cutaway view of one embodiment of the present invention.
FIG. 2 is a cutaway view of another embodiment of this invention.
FIG. 3 shows the metering pulses used to indicate the volumetric flow of liquid being dispensed or delivered.
FIG. 4 shows drive pulses used to drive the motor for the recovery pump.
FIG. 5 is a flow chart illustrating the operation of the embodiments of FIG. 1 and FIG. 2.
In the embodiment of the invention shown in FIG. 1, a hose 2 extends from a fuel dispensing pump housing 4 to a nozzle 6. Although not shown, the nozzle 6 has an outlet tube that is inserted in the inlet pipe for the gas tank of the automobile 8, and an accordion-like nose 10 that is coaxial with the inlet pipe forms a seal with the pipe so that any liquid and vapor that emanate from the pipe during the dispensing procedure will be conducted to a chamber or space 12 formed between a liquid delivery hose 14 and an outer hose 16 coaxial therewith. As described in U.S. patent application Ser. No. 07/445,384, a liquid and vapor recovery tube 18 is inserted to an expected low point in the chamber or space 12 formed between the delivery hose 14 and the associated outer hose 16. The tube 18 has such a small internal diameter that vapor passes through it with enough velocity to entrain liquid fuel. The end of the hose 16 that is remote from the nozzle 6 is sealed at a coupler 20. The liquid or fuel delivery hose 14 and the vapor recovery tube 18 pass into the pump housing 4 through a wall 22 that seals the end of the hose 16, that is joined to the coupler 20.
Inside the pump housing 4 the liquid delivery hose 14 is connected to a flow meter 24 that is connected via a mechanical connection indicated by a dashed line 26 to a pulser 28. The speed of the flow meter 24 causes the pulser 28 to deliver pulses proportional to the volume of liquid flowing through inner hose 14 to microprocessor 34. The volumetric flow of a fuel delivery pump 32 that pumps fuel from a main supply tank, not shown, via a pipe 30 to the meter 24, is changed as the operator manually changes the opening in the nozzle 6. The pump 32, a motor 33 that drives it, and the manual control just described, constitutes a fuel delivery means.
The vapor recovery tube 18 is coupled to the inlet side of a vapor recovery pump 36, and a transducer 38 produces an electrical signal indicative of hydraulic pressure at that point that is conveyed to the microprocessor 34. Vapor and liquid withdrawn from the chamber 12 via the recovery tube 18 and the recovery pump 36 are conveyed to the underground supply tank, not shown, via a tube 40.
The vapor recovery pump 36 is preferably of the displacement type in which volumetric flow is directly proportional to the speed of operation. The pump 36 is mechanically driven via a shaft 42 by an electrical motor 44 that is preferably of the stepping type. The pump 36 and the motor 44 constitute a vapor recovery means. A drive pulse source 46 supplies drive pulses to the motor 44 at a repetition rate controlled by the microprocessor 34. The housing 4 is divided into upper and lower sections by a vapor barrier panel 48, and the only electrical component below it is the pressure transducer 38 that may easily be made explosion proof.
Before discussing how the embodiment of FIG. 1 operates, reference is made to the differences of a very similar embodiment shown in FIG. 2. The principal differences are that the coaxial hose 16 is eliminated so as to make handling easier and that both the liquid delivery hose 14 and the vapor recovery tube 18 extend to the nozzle 6. As seen from the patents referred to, the nozzle 6 contains a chamber, corresponding in function to the chamber 12 of FIG. 1. The recovery tube 18 extends into the low point of the chamber, however formed, and sucks up any vapor or liquid therein. The operation of FIGS. 1 and 2 is as follows. Assume that the signal supplied by the pulser 28 is a series of pulses 47 as shown in FIG. 3, and that they have a repetition rate F proportional to the volumetric flow in the delivery hose 14. Also, assume that a series of pulses 49 shown in FIG. 4 have a repetition rate V that is equal to the repetition rate F. Pulses 49 are applied to the motor 44 for the recovery pump 36 so as to cause the latter to have the same volumetric flow for vapor and entrained liquid as occurs for fuel in the delivery hose 14. The pulses 47 and 49 could have different repetition rates for the same volumetric flow, in which case means for changing the repetition rate of the pulses 49 could be used or the microprocessor 34 could be suitably programmed.
Reference is now made to the flow chart of FIG. 5 for an explanation of operation. The input fuel pulses 47, step 45, are fed to a decision block 50. If the decision block 50 finds that the repetition rate F is 0, no fuel is being delivered so that no vapor pulses 49 are generated and no vapor is recovered. The procedure then loops back to the beginning of the chart as shown by the feedback. But, if the decision block 50 finds that F>0, the microprocessor 34 causes the drive pulse source 46 to supply drive pulses 49 having a repetition rate V=F (see step 54) to the motor 44 that drives the recovery pump 36. At this point in the process, the volumetric flow of vapor drawn through the recovery tube 18 by the recovery pump 36 is the same as the volumetric flow of liquid fuel via the delivery tube 14 to the nozzle 6. Under some conditions this is satisfactory so that the process reverts to the starting point as .[.indicted.]. .Iadd.indicated .Iaddend.by the dashed line 55.
Whereas the system thus far described works well under some conditions, improved operation is obtained under other conditions by making the volumetric vapor flow greater or less than the volumetric fuel flow. If the temperature of the fuel delivered to the vehicle tank is the same as the temperature of the fuel in the vehicle tank, satisfactory operation may be attained by making the volumetric flow of the vapor recovery means equal to the volumetric fuel flow, but, if for example, the fuel in the vehicle tank is cooler, it will be warmed up as the delivery continues so as to produce more vapor than it would if the temperatures were the same so that the volumetric flow of the vapor recovery means 36, 44 should be increased. The inverse of this situation occurs if the temperature of the fuel in the vehicle tank is warmer than the fuel being delivered.
In the embodiments of the invention shown in FIGS. 1 and 2, a pressure transducer 38 provides a signal P corresponding to the pressure at the inlet of the vapor recovery pump 36. With any given design, P would have a known nominal value X if the volume of vapors emitted from the tank equalled the volume of fuel being delivered, as might be the case if the temperature of the fuel in the vehicle tank and the fuel being delivered were the same. But, if the volume of vapor is greater than the volume of fuel being delivered, the pressure P would be greater than X, and conversely, if the volume of the vapor is less than the volume of the fuel being delivered, P would be less than X. Referring again to .[.FIG. 3.]. .Iadd.FIG. 5.Iaddend., we find the following.
If P=X, as determined by a decision block 58, the recovery pump 38 is considered to be operating at the correct speed and the repetition rate V is not changed, i.e. V is the output with V=F as in step 60.
If, however, P<X, the recovery pump 36 is running too fast, and the repetition rate V of the drive pulses is reduced, for example, by one pulse a second, step 62, i.e. to (V-1).
In the event that P>X, the pressure P is compared with an excess pressure Y, as indicated in a decision block 64.
If P≦Y, the repetition rate V is increased, for exampie, by one pulse a second, i.e. to (V+1), step 66, but if P>Y, the dispenser is shut down, via step 52. Thus if P>Y, the dispenser is shut down.
Means other than those illustrated in FIGS. 1 and 2 could be used to carry out the various functions.
The recovery pump could be driven by a D.C. motor rather than a stepping motorin which case the microprocessor 34 could be programmed to provide a signal that would select an appropriate one of a number of different D.C. voltages for application to the motor.
Instead of varying the speed of the motor driving the recovery pump 36, the vapor recovery means 36, 38 could have a valve or damper that is controlled by the microprocessor 34 so as to suck out the desired volume of vapor.
Whereas the use of the pressure P at the inlet of the recovery pump 36 is a satisfactory indication of the flow produced by the vapor recovery means, other indications could be used, e.g. a vapor flow meter could provide electrical signals indicative of the flow.
Although various embodiments of the invention have been illustrated and described herein, they are not meant to be limiting. Modifications to these embodiments may become apparent to those of skill in the art, which modifications are meant to be covered by the spirit and scope of the appended claims. For example, in the coaxial hose, the center hose could be the vapor hose, and the space between the inner and outer hose can be used to convey fuel in a system including the invention.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US2401124 *||Feb 21, 1944||May 28, 1946||Aerojet Engineering Corp||Filling nozzle valve|
|US3016928 *||Jan 19, 1959||Jan 16, 1962||Brandt Robert Jay||Device for extracting fumes from liquid fuel storage containers|
|US3581282 *||Dec 3, 1968||May 25, 1971||Charles H Lipton||Palm print identification system|
|US3605824 *||Sep 20, 1968||Sep 20, 1971||Dover Corp||Method and system for loading liquid into a container or the like|
|US3756291 *||Oct 27, 1971||Sep 4, 1973||Texaco Inc||Gasoline vapor recovery system|
|US3815327 *||May 14, 1973||Jun 11, 1974||C Viland||Method and apparatus for preventing loss of hydrocarbons to atmosphere|
|US3826291 *||Dec 11, 1972||Jul 30, 1974||Mobil Oil Corp||Dispensing volatile hydrocarbon fuels|
|US3850208 *||Mar 3, 1972||Nov 26, 1974||C Hamilton||Positive displacement vapor control apparatus for fluid transfer|
|US3881894 *||Oct 5, 1972||May 6, 1975||George R Onufer||Vapor emission control system and method|
|US3899009 *||Feb 1, 1973||Aug 12, 1975||John C Taylor||Fuel nozzle vapor return adaptor|
|US3905405 *||Sep 25, 1973||Sep 16, 1975||Weil Mclain Company Inc||Gasoline dispensing and vapor recovery system|
|US3913633 *||Oct 21, 1974||Oct 21, 1975||Weil Mclain Company Inc||Liquid dispensing and vapor recovery system|
|US3915206 *||Oct 12, 1973||Oct 28, 1975||Weil Mclain Company Inc||Gasoline dispensing and vapor recovery system|
|US3926230 *||Jun 12, 1974||Dec 16, 1975||Edward L Brown||Recovery of flammable vapors|
|US3941168 *||Dec 19, 1974||Mar 2, 1976||Weil-Mclain Company, Inc.||Liquid dispensing and vapor recovery system utilizing an injector and a vapor flow control valve|
|US3952781 *||Jan 27, 1975||Apr 27, 1976||Weil-Mclain Company, Inc.||Liquid dispensing and vapor recovery system and a vapor flow control unit used therein|
|US3981334 *||Apr 4, 1975||Sep 21, 1976||Weil-Mclain Co., Inc.||Liquid dispensing and vapor recovery system utilizing an injector and an improved vapor flow control unit|
|US4009985 *||Aug 8, 1975||Mar 1, 1977||Hirt Combustion Engineers||Method and apparatus for abatement of gasoline vapor emissions|
|US4020861 *||Aug 20, 1975||May 3, 1977||International Telephone And Telegraph Corporation||Vapor recovery valve|
|US4047548 *||Oct 28, 1975||Sep 13, 1977||Sun Oil Company Of Pennsylvania||Vapor recovery system with safety valve|
|US4056131 *||Feb 9, 1976||Nov 1, 1977||Healy James W||Vapor control in a fuel dispensing nozzle|
|US4057085 *||Apr 22, 1976||Nov 8, 1977||International Telephone And Telegraph Corporation||Vapor recovery system|
|US4057086 *||Feb 27, 1975||Nov 8, 1977||Healy James W||Vapor control|
|US4058197 *||Sep 27, 1976||Nov 15, 1977||Xerox Corporation||Ribbon tension control for a ribbon cartridge|
|US4063874 *||Feb 6, 1976||Dec 20, 1977||Clean Air Engineering, Inc.||Vapor burning apparatus|
|US4068687 *||Jul 1, 1976||Jan 17, 1978||Long Robert A||Vapor recovery liquid dispensing apparatus|
|US4082122 *||Oct 19, 1976||Apr 4, 1978||Texaco Inc.||Closed fuel system with vacuum assist|
|US4095626 *||Jun 21, 1977||Jun 20, 1978||Healy James W||Vapor recovery in a liquid dispensing unit|
|US4118170 *||Feb 24, 1977||Oct 3, 1978||Hirt Combustion Engineers||Apparatus and method of controlling gasoline vapor emissions|
|US4153073 *||Nov 25, 1977||May 8, 1979||Wylain, Inc.||Liquid dispensing and vapor recovery system and valve assembly utilized therein|
|US4166485 *||Jul 12, 1976||Sep 4, 1979||Wokas Albert L||Gasoline vapor emission control|
|US4167958 *||Mar 20, 1978||Sep 18, 1979||Atlantic Richfield Company||Hydrocarbon fuel dispensing, vapor controlling system|
|US4197883 *||Jan 16, 1978||Apr 15, 1980||Texaco Inc.||Secondary fuel recovery system|
|US4199012 *||Nov 7, 1977||Apr 22, 1980||Dover Corporation||Liquid dispensing nozzle having vapor recovery arrangement|
|US4202385 *||Feb 14, 1978||May 13, 1980||Atlantic Richfield Company||Liquid dispensing, vapor recovery system|
|US4223706 *||Jun 8, 1978||Sep 23, 1980||Texaco Inc.||Closed fuel system with vacuum assist|
|US4253503 *||Jun 21, 1979||Mar 3, 1981||Texaco Inc.||Manifold fuel vapor withdrawal system|
|US4256151 *||Mar 26, 1979||Mar 17, 1981||Texaco Inc.||System for dispensing a volatile fuel|
|US4260000 *||Jun 4, 1979||Apr 7, 1981||Texaco Inc.||Fuel dispensing system with controlled vapor withdrawal|
|US4273164 *||Dec 6, 1978||Jun 16, 1981||Texaco Inc.||Manifolded fuel vapor|
|US4292020 *||May 31, 1979||Sep 29, 1981||Hirt Combustion Engineers||Method and apparatus for abatement of gasoline vapor emissions|
|US4295505 *||Dec 26, 1979||Oct 20, 1981||Hasselmann Detlev E M||Gasoline vapor recovery system|
|US4306594 *||Oct 8, 1980||Dec 22, 1981||Texaco Inc.||Vacuum assist fuel system|
|US4310033 *||Dec 10, 1979||Jan 12, 1982||The Marley-Wylain Company||Liquid dispensing and uphill vapor recovery system|
|US4336830 *||Apr 28, 1980||Jun 29, 1982||Healy James W||Vapor recovery jet pump|
|US4429725 *||Dec 30, 1981||Feb 7, 1984||Standard Oil Company (Indiana)||Dispensing nozzle for vacuum assist vapor recovery system|
|US4522237 *||Jul 8, 1982||Jun 11, 1985||Tokyo Tatsuno Co., Ltd.||Apparatus for dispensing liquids|
|US4566504 *||Sep 15, 1983||Jan 28, 1986||Gilbarco Inc.||Insertion tube liquid evacuator system for vapor recovery hose|
|US4649970 *||Oct 18, 1985||Mar 17, 1987||Emco Wheaton, Inc.||Magnetically actuated vapor valve|
|US4662539 *||Jul 17, 1984||May 5, 1987||Tokico Ltd.||Fuel supplying apparatus|
|US4680004 *||Mar 4, 1986||Jul 14, 1987||Hirt Combustion Engineers||Method and apparatus for controlling gasoline vapor emissions|
|US4687033 *||May 19, 1986||Aug 18, 1987||Gilbarco, Inc.||Venturi liquid evacuator system for maintaining clear vapor path in vapor recovery hose|
|US4749009 *||Oct 23, 1987||Jun 7, 1988||Tokheim Corporation||Vapor passage fuel blockage removal|
|US4790349 *||Apr 4, 1988||Dec 13, 1988||Stant Inc.||Tank pressure control system|
|US5005613 *||Jun 8, 1990||Apr 9, 1991||The Goodyear Tire & Rubber Company||Light weight flexible coaxial vapor recovery hose|
|US5038838 *||Jan 4, 1990||Aug 13, 1991||Nuovopignone-Industrie Meccaniche E Fonderia S.P.A.||System for safe vapour recovery, particularly suitable for fuel filling installations|
|US5123817 *||Aug 10, 1990||Jun 23, 1992||Koppens Automatic Fabrieken B.V.||Vapor exhaust system|
|DE2817980A1 *||Apr 24, 1978||Nov 2, 1978||Calgon Corp||Treibstoffdampf-rueckfuehrsystem|
|DE3903603A1 *||Feb 8, 1989||Aug 9, 1990||Schwelm Tanksysteme Gmbh||Tank installation for motor vehicles|
|DE8717378U1 *||Oct 5, 1987||Sep 15, 1988||Tankanlagen Salzkotten Gmbh, 4796 Salzkotten, De||Title not available|
|DE9007190U1 *||Jun 28, 1990||Aug 30, 1990||Tankanlagen Salzkotten Gmbh, 4796 Salzkotten, De||Title not available|
|FR2641267A1 *||Title not available|
|GB2014544A *||Title not available|
|GB2226812A *||Title not available|
|JPH01199898A *||Title not available|
|1||*||Giulf (VCP System) 6 pages Undated.|
|2||*||Hirt Combustion Engineers (VCS 200 Vapor Net) Jun. 1986 6 pages.|
|3||Hirt Combustion Engineers (VCS-200 Vapor Net) Jun. 1986 6 pages.|
|4||*||Nuovo Pignone Analysis dated Feb. 28, 1989 by Giorgio Bergamini.|
|5||*||Patent Application filed May 7, 1979, No. 36,302 to Walker et al., abandoned file.|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US5868175 *||Jun 28, 1996||Feb 9, 1999||Franklin Electric Co., Inc.||Apparatus for recovery of fuel vapor|
|US6213172 *||Jan 31, 2000||Apr 10, 2001||Timothy E. Dickson||Fraud detection through vapor recovery analysis|
|US6240982||Dec 22, 1999||Jun 5, 2001||Parker Hannifin Corporation||Gasoline vapor recovery system|
|US6338369||Aug 29, 2000||Jan 15, 2002||Marconi Commerce Systems Inc.||Hydrocarbon vapor sensing|
|US6347649||Nov 16, 2000||Feb 19, 2002||Marconi Commerce Systems Inc.||Pressure sensor for a vapor recovery system|
|US6357493||Oct 23, 2000||Mar 19, 2002||Marconi Commerce Systems Inc.||Vapor recovery system for a fuel dispenser|
|US6418983||Jun 23, 2000||Jul 16, 2002||Gilbasco Inc.||Vapor flow and hydrocarbon concentration sensor for improved vapor recovery in fuel dispensers|
|US6438452 *||Jan 31, 2000||Aug 20, 2002||Gilbarco Inc.||Fraud detection through time analysis|
|US6460579||Jan 23, 2001||Oct 8, 2002||Gilbarco Inc.||Vapor flow and hydrocarbon concentration sensor for improved vapor recovery in fuel dispensers|
|US6499516||Dec 6, 2001||Dec 31, 2002||Gilbarco Inc.||Vapor flow and hydrocarbon concentration sensor for improved vapor recovery in fuel dispensers|
|US6529800||Apr 1, 1999||Mar 4, 2003||Gilbarco Inc.||Fuel dispensing method and control system for refueling from master and satellite dispensers|
|US6532999||Dec 11, 2001||Mar 18, 2003||Gilbarco Inc.||Pressure sensor for a vapor recovery system|
|US6622757||Nov 30, 2000||Sep 23, 2003||Veeder-Root Company||Fueling system vapor recovery and containment performance monitor and method of operation thereof|
|US6644360||May 6, 2002||Nov 11, 2003||Gilbarco Inc.||Membrane and sensor for underground tank venting system|
|US6697705||Dec 6, 2002||Feb 24, 2004||Gilbarco Inc.||Fuel dispensing method for refueling from master and satellite dispensers|
|US6712101||Nov 17, 1999||Mar 30, 2004||Gilbarco Inc.||Hydrocarbon sensor diagnostic method|
|US6761190||Jun 21, 2002||Jul 13, 2004||Gilbarco Inc.||Underground storage tank vapor pressure equalizer|
|US6802344||Jun 27, 2002||Oct 12, 2004||Veeder-Root Company||Fueling system vapor recovery and containment performance monitor and method of operation thereof|
|US6830080||Mar 13, 2003||Dec 14, 2004||Gilbarco Inc.||Output control for turbine vapor flow meter|
|US6840292||Mar 5, 2003||Jan 11, 2005||Veeder-Root Company||Apparatus and method to control excess pressure in fuel storage containment system at fuel dispensing facilities|
|US6854342||Aug 26, 2002||Feb 15, 2005||Gilbarco, Inc.||Increased sensitivity for turbine flow meter|
|US6880585||May 1, 2003||Apr 19, 2005||Veeder-Root Company||Fueling system vapor recovery and containment performance monitor and method of operation thereof|
|US6901786||Aug 21, 2003||Jun 7, 2005||Veeder-Root Company||Fueling system vapor recovery and containment leak detection system and method|
|US6929018||Apr 7, 2004||Aug 16, 2005||Gilbarco Inc.||Underground storage tank metering system in a service station environment|
|US6929037||Feb 24, 2004||Aug 16, 2005||Gilbarco Inc.||Underground storage tank vapor pressure equalizer|
|US6929038||Feb 24, 2004||Aug 16, 2005||Gilbarco Inc.||Underground storage tank vapor pressure equalizer|
|US6935161||Jul 14, 2004||Aug 30, 2005||Gilbarco Inc.||Service station leak detection and recovery system|
|US6935356||Mar 14, 2003||Aug 30, 2005||Gilbarco Inc.||Underground storage tank metering system in a service station environment|
|US6962269||Jun 18, 2002||Nov 8, 2005||Gilbarco Inc.||Service station leak detection and recovery system|
|US6964283||Sep 7, 2004||Nov 15, 2005||Veeder-Root Company||Fueling system vapor recovery and containment performance monitor and method of operation thereof|
|US6968868||Dec 11, 2003||Nov 29, 2005||Veeder-Root Company||Fueling system vapor recovery and containment performance monitor and method of operation thereof|
|US6974054||Nov 5, 2002||Dec 13, 2005||Gilbarco Inc.||Service station leak detection with recovery system|
|US7111520||Sep 29, 2004||Sep 26, 2006||Gilbarco Inc.||Increased sensitivity for liquid meter|
|US7275417||Aug 24, 2005||Oct 2, 2007||Veeder-Root Company||Fueling system vapor recovery and containment performance monitor and method of operation thereof|
|US7322384||Feb 16, 2005||Jan 29, 2008||Adapco, Inc.||Hazardous fluids transfer system and method|
|US7566358||Oct 5, 2006||Jul 28, 2009||Veeder-Root Company||Fuel storage tank pressure management system and method employing a carbon canister|
|US7798184||Oct 9, 2008||Sep 21, 2010||Schultz Jr Robert L||Fuel transfer coupling|
|US7849728||Oct 1, 2007||Dec 14, 2010||Veeder-Root Company||Fueling system vapor recovery and containment performance monitor and method of operation thereof|
|US7909069||May 4, 2006||Mar 22, 2011||Veeder-Root Company||System and method for automatically adjusting an ORVR compatible stage II vapor recovery system to maintain a desired air-to-liquid (A/L) ratio|
|US7975528||Feb 8, 2010||Jul 12, 2011||Veeder-Root Company||Fueling system vapor recovery and containment performance monitor and method of operation thereof|
|US8075667 *||Jul 27, 2009||Dec 13, 2011||Veeder-Root Company||Fuel storage tank pressure management system and method employing a carbon canister|
|US8191585||May 28, 2009||Jun 5, 2012||Franklin Fueling Systems, Inc.||Method and apparatus for monitoring for a restriction in a stage II fuel vapor recovery system|
|US8235079||Jun 22, 2011||Aug 7, 2012||Schultz Jr Robert L||Fuel transfer coupling|
|US8327689||Feb 8, 2010||Dec 11, 2012||Veeder-Root Company||Fueling system vapor recovery and containment performance monitor and method of operation thereof|
|US8376000||May 10, 2007||Feb 19, 2013||Delaware Capital Formation, Inc.||Hydrocarbon vapor emission control|
|US8402817||May 28, 2009||Mar 26, 2013||Franklin Fueling Systems, Inc.||Method and apparatus for monitoring for leaks in a stage II fuel vapor recovery system|
|US8448675||Mar 6, 2012||May 28, 2013||Franklin Fueling Systems, Inc.||Method and apparatus for monitoring for a restriction in a stage II fuel vapor recovery system|
|US8453685||Aug 24, 2010||Jun 4, 2013||Robert L. Schultz, Jr.||Fuel transfer coupling|
|US8573262||Mar 18, 2011||Nov 5, 2013||Veeder-Root Company||System and method for automatically adjusting an ORVR compatible stage II vapor recovery system to maintain a desired air-to-liquid (A/L) ratio|
|US8677805||May 17, 2010||Mar 25, 2014||Franklin Fueling Systems, Inc.||Method and apparatus for detecting a leak in a fuel delivery system|
|US8893542||Dec 6, 2012||Nov 25, 2014||Veeder-Root Company||Fueling system vapor recovery and containment performance monitor and method of operation thereof|
|US9108837||Apr 16, 2013||Aug 18, 2015||Franklin Fueling Systems, Inc.||Method and apparatus for monitoring for a restriction in a stage II fuel vapor recovery system|
|US9296602 *||Feb 4, 2013||Mar 29, 2016||Paul R. Juhasz||Vehicle fuel dispensing system for dwellings|
|US9346663||Jan 27, 2014||May 24, 2016||Schultz Engineered Products, Inc.||Fluid transfer coupling|
|US9759631||Nov 24, 2014||Sep 12, 2017||Veeder-Root Company||Fueling system vapor recovery and containment performance monitor and method of operation thereof|
|US9802809||May 23, 2016||Oct 31, 2017||Schultz Engineered Products, Inc.||Fluid transfer device with pressure equilibrium valve|
|US20020105645 *||Jan 29, 2002||Aug 8, 2002||Eriksson Klas Goran||Monitoring particles in a fluid flow|
|US20030192617 *||May 1, 2003||Oct 16, 2003||Hart Robert P.||Fueling system vapor recovery and containment performance monitor and method of operation thereof|
|US20030205287 *||May 6, 2002||Nov 6, 2003||Sobota Richard R.||Membrane and sensor for underground tank venting system|
|US20030230352 *||Mar 5, 2003||Dec 18, 2003||Hart Robert P.||Apparatus and method to control excess pressure in fuel storage containment system at fuel dispensing facilities|
|US20030230592 *||Jun 18, 2002||Dec 18, 2003||Hutchinson Ray J.||Service station leak detection and recovery system|
|US20030230593 *||Nov 5, 2002||Dec 18, 2003||Hutchinson Ray J.||Service station leak detection and recovery system|
|US20030234060 *||Jun 21, 2002||Dec 25, 2003||Nanaji Seifollah S.||Underground storage tank vapor pressure equalizer|
|US20040020271 *||Jul 31, 2002||Feb 5, 2004||Hutchinson Ray J.||Contaminant containment system in a fueling environment|
|US20040035220 *||Aug 26, 2002||Feb 26, 2004||Payne Edward A.||Increased sensitivity for turbine flow meter|
|US20040069372 *||Aug 21, 2003||Apr 15, 2004||Hart Robert P.||Fueling system vapor recovery and containment leak detection system and method|
|US20040154692 *||Dec 11, 2003||Aug 12, 2004||Hart Robert P.||Fueling system vapor recovery and containment performance monitor and method of operation thereof|
|US20040163726 *||Feb 24, 2004||Aug 26, 2004||Nanaji Seifollah S.||Underground storage tank vapor pressure equalizer|
|US20040163727 *||Feb 24, 2004||Aug 26, 2004||Nanaji Seifollah S.||Underground storage tank vapor pressure equalizer|
|US20040177885 *||Mar 14, 2003||Sep 16, 2004||Shepard Robert S.||Underground storage tank metering system in a service station environment|
|US20040177894 *||Mar 13, 2003||Sep 16, 2004||Nanaji Seifollah S.||Output control for turbine vapor flow meter|
|US20040187933 *||Apr 7, 2004||Sep 30, 2004||Shepard Robert S||Underground storage tank metering system in a service station environment|
|US20050034508 *||Jul 14, 2004||Feb 17, 2005||Hutchinson Ray J.||Service station leak detection and recovery system|
|US20050039546 *||Sep 29, 2004||Feb 24, 2005||Payne Edward A.||Increased sensitivity for liquid meter|
|US20050189036 *||Feb 16, 2005||Sep 1, 2005||Bryan Avron L.||Hazardous fluids transfer system and method|
|US20070131111 *||Oct 5, 2006||Jun 14, 2007||Veeder-Root Company||Fuel storage tank pressure management system and method employing a carbon canister|
|US20070199598 *||Feb 6, 2007||Aug 30, 2007||Schultz Robert L Jr||Fuel transfer coupling|
|US20070267089 *||May 10, 2007||Nov 22, 2007||John Matthew Gray||Hydrocarbon vapor emission control|
|US20090199914 *||Oct 9, 2008||Aug 13, 2009||Tilling Basil B||Fuel transfer coupling|
|US20090293592 *||May 28, 2009||Dec 3, 2009||Franklin Fueling Systems, Inc.||Method and apparatus for monitoring for leaks in a stage ii fuel vapor recovery system|
|US20090293847 *||May 28, 2009||Dec 3, 2009||Franklin Fueling Systems, Inc.||Method and apparatus for monitoring for a restriction in a stage ii fuel vapor recovery system|
|US20100018390 *||Jul 27, 2009||Jan 28, 2010||Veeder-Root Company||Fuel storage tank pressure management system and method employing a carbon canister|
|US20100132436 *||Feb 8, 2010||Jun 3, 2010||Veeder-Root Company||Fueling system vapor recovery and containment performance monitor and method of operation thereof|
|US20100139371 *||Feb 8, 2010||Jun 10, 2010||Veeder-Root Company||Fueling system vapor recovery and containment performance monitor and method of operation thereof|
|US20100288019 *||May 17, 2010||Nov 18, 2010||Franklin Fueling Systems Inc.||Method and apparatus for detecting a leak in a fuel delivery system|
|US20100319807 *||Aug 24, 2010||Dec 23, 2010||Schultz Jr Robert L||Fuel transfer coupling|
|US20110220240 *||Mar 18, 2011||Sep 15, 2011||Veeder-Root Company||System and method for automatically adjusting an orvr compatible stage ii vapor recovery system to maintain a desired air-to-liquid (a/l) ratio|
|US20140216596 *||Feb 4, 2013||Aug 7, 2014||Paul R. Juhasz||Vehicle Fuel Dispensing System for Dwellings|
|EP1101729A1||Nov 15, 2000||May 23, 2001||Marconi Commerce Systems Inc.||Method and apparatus for diagnosing the performance of a vapour recovery unit|
|EP1127837A2||Feb 7, 2001||Aug 29, 2001||Marconi Commerce Systems Inc.||Vapor recovery monitory in a fuelling system|
|WO2003106325A1||Jun 18, 2003||Dec 24, 2003||Gilbarco Inc.||Service station leak detection and recovery system|
|WO2004080884A2 *||Mar 11, 2004||Sep 23, 2004||Nuovo Pignone S.P.A.||System for controlling the vapour recovery of a fuel pump|
|WO2004080884A3 *||Mar 11, 2004||Jan 6, 2005||Nuovo Pignone Spa||System for controlling the vapour recovery of a fuel pump|
|U.S. Classification||141/59, 141/83, 141/45, 141/51, 141/7|
|Feb 11, 1999||FPAY||Fee payment|
Year of fee payment: 8
|Jan 31, 2000||AS||Assignment|
Owner name: MARCONI COMMERCE SYSTEMS INC., NORTH CAROLINA
Free format text: CHANGE OF NAME;ASSIGNOR:GILBARCO INC.;REEL/FRAME:010589/0269
Effective date: 19991206
|Aug 28, 2002||AS||Assignment|
Owner name: GILBARCO INC., NORTH CAROLINA
Free format text: CHANGE OF NAME;ASSIGNOR:MARCONI COMMERCE SYSTEMS INC.;REEL/FRAME:013177/0660
Effective date: 20020215
|Dec 20, 2002||FPAY||Fee payment|
Year of fee payment: 12