Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS3561465 A
Publication typeGrant
Publication dateFeb 9, 1971
Filing dateMay 7, 1969
Priority dateMay 7, 1969
Publication numberUS 3561465 A, US 3561465A, US-A-3561465, US3561465 A, US3561465A
InventorsGraaf Paul A De
Original AssigneeParker Hannifin Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Jet level sensor
US 3561465 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

United States Patent lnventor Paul A. de Graaf Los Angeles, Calif. Appl. No. 822,403 Filed May 7, 1969 Patented Feb. 9, 1971 Assignee Parker-Hannifin Corporation Cleveland, Ohio a corporation of Ohio JET LEVEL SENSOR 7 Claims, 3 Drawing Figs.

US. Cl 137/81.5, 137/386 Int. Cl F151: 1/14 FieldofSearch 137/815, 386, 389, 390, 393; 73/548 [56] References Cited UNITED STATES PATENTS 2,333,044 10/1943 Rosch 73/548 3,020,924 2/1962 Davies.... 137/386 3,269,404 8/1966 Lebow.... 137/386X 3,267,949 8/1966 Adams 137/815 3,277,914 10/1966 Manion 137/815 Primary Examiner-William F. ODea Assistant Examiner-David R. Matthews Att0rney-Diller, Brown, Ramik & Holt ABSTRACT: This disclosure relates to a sensor for operating a flow control valve pilot. The sensor incorporates a jet which is interrupted by rising liquid within a container and includes an aspirator for picking up liquid and deflecting the jet to render same ineffective.

,PATENTEUFEH 91am 3 15 1 455 INVENTOR PAU L A. de GRAN ATTORNEYS JET LEVEL SENSOR This invention specifically relates to the addition of an aspirator to a jet level sensor to effect deflection of a control jet as opposed to resistance to flow byrising liquid whereby a higher jet pressure may be utilized for more effective control.

Previously jet level sensors have been provided for automatically actuating pilots of filling valves to effect automatic shutoff when liquid reaches a predetermined level. These sensors employ a liquid jet directed across a void to a receiver with the jet being interrupted by liquid rising within the void. Prior sensors were limited to 20 psi. pressures in that higher pressure jets are not sufficiently affected by the presence of intervening liquid. j

Jet level sensors may operate at pressures as high as 150 psi. by providing an aspirator at the discharge end of a jet nozzle for drawing rising liquid transversely across a flowing jet to deflect same from its normal path to a receiver. Such sensors do not rely upon the presence of intervening liquid to disrupt jet flow and are not of limited operating pressure. v

With the above and other objects in view that will hereinafter appear, the nature of the invention will be more clearly understood by reference to the following detailed description, the appended claims and the several views illustrated in the accompanying drawing:

In the drawing:

FIG. 1 is a schematic sectional view through a tank having level control filling mechanism. 1

FIG. 2 is an enlarged schematic sectional view showing control valve operated by the sensor.

FIG. 3 is an enlarged sectional view through the sensor.

A typical tank filling system is shown in FIG. 1 as including tank 5 having filler conduit 6 connected to an inlet of shutoff valve 7. Jet level sensor 8,positioned at a desired level in tank 5, is connected to conduit 6 by supply line 9 and to pilot 10 of valve 7 by pilot line 11. i

Details of typical shutoff valve 7 are found in FIG. 2. Valve 7 has pressure controlled diaphragm mounted valve member 12 controlling flow from conduit 6 into tank 5. Small passage 13 in valve member 12 permits pressure build up above valve member 12 to close same.

Pilot 10 controls pressure above valve member 12 and includes vent 14, which is larger than passage 13, controlled by pilot valve member 15 constantly urged to closed position by spring 16. Pressure controlled diaphragm mounted piston 17 is connected to valve member 15 for unseating same in response to pressure exerted on'piston 17 through pilot line 11. l

Details of new sensor 8 are shown in-FIG. 3 as including housing 20 having central opening 21. Bore 22 extends through housing 20 with fitting 23 of supply line 9 threaded in one end and end portion 24 at other end opening into opening 21. Central portion of bore 22 is restricted to form jet nonle 25. Housing 20 has aspirator 26 in form of a bore opening upwardly into end portion 24 for drawing liquid in tank 5 into end portion 24 by flowing liquid jet.

Housing 20 has bore 27 on opposite side of housing 21 from bore 22 aligned with bore 22. Receiver 28 is mounted in bore 27 at opening 21 for receiving liquid jet from jet nozzle 25. The opposite end of bore 27 has threaded therein fitting 29 of pilot line 1 l to direct jet pressure into pilot 10.

Tank 5 is filled by coupling to adapter 30 thereof, carried by conduit 6, filling nozzle 31, and initiating flow by turning control handle 32 (FIG. 2). Liquid flows through line 9 to sensor 8 to apply pilot opening pressure to piston 17 through line 11,

venting space in valve 7 above valve member 12 through vent l4.

Liquid entering valve 7 from conduit 6 moves valve member 12 to open position and flows through opening 33 in valve 7 into tank 5. Flow into tank 5 continues until liquid reaches sensor 8 at which time jet flow from nozzle 25 to receiver 28 is disrupted and pressure on piston 17 is reduced, permitting spring 16 to move valve member 15 to block flow from passage 13 to vent l4. Hressure in valve 7 above valve member 15 moves valve member 15 to closed position to stop flow into tank 5.

In prior sensors flow of liquid into opening 21 was relied upon to disrupt jet flowing from jet nozzle 25 into receiver 28. This provided an effective control when liquid'delivered to sensor had a maximum pressure of 20 psi. Increased pressures permit jet flow through liquid in opening 21 sufficiently to prevent difficulties in obtaining assured accurate control of pilot l0.

Aspirator 26 permits flow of liquid jet through end portion 24 to draw liquid, which has reached sensor level, into end portion 24 normal to axis of jet flow. Aspirated liquid, striking liquid jet at right angles to axis of flow, deflects liquid jet sufficiently to miss small entrance of receiver 28. Thus, liquid at higher pressures may be directed to sensor 8 without effecting efficient operation thereof. Pressure of liquid directed to sensor 8 may be that of liquid in conduit 6 which may be on the order of psi. and higher.

Although only a single embodiment of sensor has been illustrated and described, it is to be understood that minor modifications may be made therein without departing from the spirit of the invention.


l. A jet sensor particularly adapted to detect the pressure of liquid, said sensor comprising a jet noule for directing a jet flow of liquid along a predetermined axis, a receiver spaced from said jet nozzle and aligned with the axis of jet flow therefrom the receiving a jet flow from said jet nozzle to maintain a pressurized control, and means for directing detected liquid transversely of the axis of said jet: nozzle against jet flow therefrom to deflect such jet flow away from said receiver and thus remove the pressurized control.

2. The jet sensor of claim 1 wherein said means for directing detected liquid are aspirator means.

3. The jet sensor of claim 1 wherein said means for directing detected liquid are aspirator means effected by jet flow from said jet nozzle.

4. The jet sensor of claim I wherein said means for directing detected liquid are aspirator means, said aspirator means including an axial bore into which said jet nozzle opens and a transverse bore opening into said axial bore adjacent said jet nozzle.

5. The jet sensor of claim 1 wherein said sensor is a liquid level sensor.

6. The jet sensor of claim 1 wherein said sensor is a liquid level sensor and said sensor is part of a container filling apparatus.

7. The jet sensor of claim 1 wherein said sensor is a liquid level sensor and said sensor is part of a container filling ap paratus, said apparatus including a filler conduit, a shutoff valve controlling flow from said filler conduit into the container, said shutoff valve having a pilot control connected to and positioned by said sensor, and said sensor being connected to said filler conduit for effecting the jet flow thereof.

3 33 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 561,465 Dated February 9, 1971 Inventor(s) PAUL A. deGRAAF 'It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

1'- Column 2, line 33, read presence for "pressure";

Line 37, read for for "the".

Signed and sealed this 9th day of January 1973 (SEAL) Attest:

EDWARD M.FLETCHER,JR. ROBERT GOTTSCHALK Attesting Officer Commissioner of Patent

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2333044 *May 7, 1941Oct 26, 1943Gen ElectricGoverning mechanism
US3020924 *Sep 14, 1959Feb 13, 1962Parker Hanaifin CorpAutomatic shut-off valve
US3267949 *Mar 2, 1964Aug 23, 1966Moore Products CoLevel control apparatus
US3269404 *Dec 3, 1962Aug 30, 1966Parker Hannifin CorpAutomatic shutoff valve
US3277914 *Dec 12, 1963Oct 11, 1966Bowles Eng CorpAutomatic fill valve
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3680573 *May 5, 1970Aug 1, 1972American Standard IncPilot valve operated fluidic valve
US3703907 *Oct 30, 1970Nov 28, 1972Richards George BFluid amplifiers
US3762445 *Nov 29, 1971Oct 2, 1973Agency Ind Science TechnFluidic device
US3771549 *Oct 21, 1971Nov 13, 1973Dover CorpSystem for loading and unloading a container at its bottom
US3830096 *Jul 18, 1972Aug 20, 1974Meidensha Electric Mfg Co LtdA load insensitive type fluid restrictor
US4024887 *Nov 24, 1975May 24, 1977Vought CorporationAutomatic valving system
US4075912 *Dec 20, 1976Feb 28, 1978General Motors CorporationTransmission with sump oil level responsive controls
US4148334 *Feb 3, 1977Apr 10, 1979Fluid Device CorporationLiquid level control sytem
US4161188 *Dec 2, 1977Jul 17, 1979Parker-Hannifin CorporationJet type liquid level sensor and system
US4211249 *Sep 7, 1978Jul 8, 1980Fluid Device CorporationLiquid level control system
US4252017 *Aug 2, 1979Feb 24, 1981Zaslavsky Leonid IApparatus for monitoring fluid level in a vessel
US4292996 *Oct 24, 1979Oct 6, 1981Omuv Orvosi Muszer Es Vasipari SzovetkezetStop valve
US4312373 *Mar 24, 1980Jan 26, 1982Parker-Hannifin CorporationInternal valve
US4515178 *May 29, 1984May 7, 1985Campau Daniel NLiquid level control device
US4522228 *Jun 12, 1984Jun 11, 1985Campau Daniel NFluidic level control system
US4527593 *May 4, 1983Jul 9, 1985Campau Daniel NApparatus and system for filling one or more containers with a liquid to a predetermined level
US5285812 *Sep 9, 1992Feb 15, 1994Hr Textron, Inc.Jet level sensor for fuel tanks
US6837262 *Jan 15, 2002Jan 4, 2005Adel Wiggins GroupNon tank pressurizing fast fill receiver and system for vehicles
US7258130Jan 3, 2005Aug 21, 2007Adel Wiggins GroupIntegrated jet fluid level shutoff sensor and fuel tank vent for vehicles
US7757709Jul 6, 2007Jul 20, 2010Adel Wiggins GroupIntegrated jet fluid level shutoff sensor and fuel tank vent for vehicles
US8430117Apr 26, 2010Apr 30, 2013Michael J. MitrovichRefueling apparatus
US8899282 *Jan 25, 2011Dec 2, 2014Airbus HelicoptersDevice for filling a tank by gravity or under pressure
US8955561Oct 4, 2012Feb 17, 2015Spillx LlcRefilling apparatus with jet level sensor
US20050166966 *Jan 3, 2005Aug 4, 2005Jose CortezIntegrated jet fluid level shutoff sensor and fuel tank vent for vehicles
US20080011359 *Jul 6, 2007Jan 17, 2008Adel Wiggins GroupIntegrated jet fluid level shutoff sensor and fuel tank vent for vehicles
US20110315271 *Dec 29, 2011EurocopterDevice for filling a tank by gravity or under pressure
EP0100666A1 *Jul 29, 1983Feb 15, 1984Daniel N. CampauLiquid level control device
EP0125789A1 *Apr 11, 1984Nov 21, 1984Flow Rite Control, Ltd.Apparatus for filling a container with a liquid to a determined level
WO2015089510A1 *Dec 15, 2014Jun 18, 2015Flomax International, Inc.Fuel tank vent and shutoff valve
U.S. Classification137/805, 137/386, 137/842
International ClassificationG01F23/16, G01F23/14
Cooperative ClassificationG01F23/161
European ClassificationG01F23/16A