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Publication numberUS3566928 A
Publication typeGrant
Publication dateMar 2, 1971
Filing dateJul 22, 1969
Priority dateJul 22, 1969
Also published asCA920557A, CA920557A1, DE2035985A1
Publication numberUS 3566928 A, US 3566928A, US-A-3566928, US3566928 A, US3566928A
InventorsWilliam B Hansel
Original AssigneeSun Oil Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Vapor seal for dispensing nozzles
US 3566928 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

United States Patent William B. Hansel Media, Pa. 843,719

July 22, 1969 Mar. 2, 1971 Sun Oil Company Philadelphia, Pa.

Inventor Appl. No. Filed Patented Assignee VAPOR SEAL FOR DISPENSING NOZZLES 4 Claims, 3 Drawing Figs.

U.S. CI 141/97, 141/392, 285/9 Int. Cl B65b l/28, B67c 3/02, B65b 3/18 Field of Search 141/52, 59, 97, 310, 290, 390, 392, 383-386; 285/9 (m), (Inquired) VAPORS TO HOUS G [56] References Cited UNITED STATES PATENTS 569,180 10/1896 Donally 14l/290X 2,803,269 8/1957 Switzer 141/290X 2,908,299 10/1959 Gosselin. 141/290X 3,151,695 10/1964 Mintz 285/9(M)X 3,318,345 5/1967 Beall 141/59 FOREIGN PATENTS 1,292,909 4/1962 France 141/290 1,322,086 2/1963 France 141/290 119,493 8/1947 Sweden 141/290 Primary Examiner- Houston S. Bell, Jr. Attorneys-George L. Church, Donald R. Johnson, Wilmer E.

Mc Corquodale, Jr. and Frank A. Rechif ABSTRACT: Vapors displaced from a liquid fuel tank by the liquid fuel being dispensed thereinto through a nozzle are collected by means of a flexible bellows which surrounds the nozzle and one end of which is sealed to the llpipe of the fuel tank.

VAPOR SEAL FOR DISPENSING NOZZLES This invention relates to a sealing device for dispensing nozzles, for example of the type commonly used at service stations to dispense liquid fuel into motor vehicles such as automobiles.

When liquid hydrocarbon fuel (such as gasoline) is dispensed into the fuel tank of a motor vehicle, it displaces vapors from this tank; these displaced vapors contain hydrocarbons in the amount of approximately 0.2 percent of the fuel delivered. If these vapors were allowed to escape to the atmosphere, the hydrocarbons included therein would add to the air pollution problem. In addition, these vapors, containing as they do combustible components, would present something of a fire hazard to the operator.

In the past, a structure has been proposed for providing a vaportight seal between a gasoline dispensing nozzle and a fuel tank, for collecting the vapors displaced from the tank by the entering fuel. This structure, however, functions as a so-called tight-fill system, and has mechanical means'for both lclamping the nozzle in the fillpipe of the tankV and also providing force for the seal. This structure incorporates a seal release mechanism, and also an automatic fuel shutoff` responsive to a buildup of pressure. This structure comprises a nozzle of somewhat unusual design, with the internal clamping mechanism forming an integral part thereof, and would require the replacement of all presently existing nozzles with this nozzle of different design. In addition, some fillpipes will not accept this particular clamping mechanism. When this occurs, the automatic nozzle must be held in place by an operator, and this is undesirable.

An object of this invention is to provide a novel vapor seal for fuel dispensing nozzles. i

Another object is to provide a vapor seal of simplified design, such that it can be readily applied as an attachment to presently existing nozzles,

A further object is to provide a vapor seal of universal application, which will perform satisfactorily with all types of fillpipes presently in use.

The objects of this invention are accomplished; briefly, in the following manner;

A flexible bellows, sized to surround a dispensing nozzle of conventional construction, has a ring-shaped magnetic sealing assembly at its lower end which is adapted to form a flat face seal at the upper end of a fillpipe into which the nozzle is inserted. The upper end of the bellows sealingly engages the outer surface of the nozzle, and this end of the bellows has a tubular coupling through which the vapors collected in the bellows may be led off for suitable disposition.

A detailed description of the invention follows, taken in conjunction with the accompanying drawing, wherein:

FIG. 1 is a combined elevational and cross-sectional view showing a dispensing nozzle equipped with the vapor seal arrangement of this invention, in dispensing positionv in a fillpipe;

FIG. 2 is a sectional view taken on line 2-2 of FIG. 1, on an enlarged scale; and

FIG. 3 is a cross section taken on line 3-3 of FIG. 2.

Referring now to the drawing, a gasoline dispensing nozzle 1, of a type widely used in the industry, is adapted to be connected to the outer end of a dispensing hose (not shown). The nozzle l has the usual pivotally mounted lever 2 for operating a shut off valve (not shown) which is located in the nozzle body, and also is a conventional pivotally mounted, springbiased clip 3 which coacts with lever 2 to provide an arrangement for holding the shutoff valve open without the necessity of manually holding lever 2 in its open position. A discharge spout 4 is provided on nozzle 1, opposite the hose connection to the nozzle, this spout having a somewhat curved outer configuration such that it is readily insertable into the metallic fillpipe 5 of a motor vehicle fuel tank (not shown). The usual resilient clamp wire 6, wound around the outside of spout 4,

assists in holding the nozzle spout in the fillpipe 5. Also, the usual soft, impact-absorbing rubber cover 7 is provided on the forward end of the body of nozzle 1. In FIG. l, only the upper end of the fillpipe 5 is shown.

The foregoing has described certain distinctive features of a well known and presently existing gasoline dispensing nozzle. The attachment according to the present invention, which operates to provide a vaportight seal between the nozzle (or the spout attached thereto) and the fillpipe, so as to collect vapors displaced from the tank by the fuel being dispensed thereinto, will now be described. t

A flexible bellows 8, made of a soft elastomeric or rubberlike synthetic material which is unaffected by gasoline, surrounds the spout 4 at the upper end thereof, adjacent the point of attachment of this spout to the nozzle proper.

` At its upper end, the elongated hollow member or bellows 8 has an integral cylindrical portion or collar 9 which is adhesively or otherwise suitably secured in a vaportight manner to the outer cylindrical surface of the spout 4. The upper end of the bellows could be secured to or made integral with the lower end of the rubber cover 7.

At or near its upper end, the bellows 8 is provided with a tubular coupling 10, to which the outer end of a tube or hose (not shown) may be attached, for abstracting vapors from the interior of the bellows.

One face of a composite essentially flatannular or ringshaped sealing assembly 11 is secured in vaportight fashion (adhesively, or in other suitable manner) to the lower end of bellows 8. The assembly 1l consists of three separate elements secured together in a concentric arrangement, an inner pole piece 12 of a low-carbon steel, an intermediate element 1,3 of the material commonly known as magnetic rubber," and an outer pole piece 14 of a low-carbon steel. The elements l2- -14 are all annular or ring-shaped, with the inner cylindrical wall of element 13 secured to the outer cylindrical wall of element 12, and with the outer cylindrical wall of element 13 secured to the inner cylindrical wall of element 14. The ID of element 12 is greater than the OD of spout 4, thus providing an annular space around the outside of this spout; this space provides a passage for vapors from the fillpipe 5 into the lower end of bellows 8. The axial length of the outer pole piece 14 is preferably greater than that of the inner pole piece l2, and the radial width of pole piece 14 is preferably somewhat less than that ofpole piece 12 (see FIG. 3).

The material from which element 13 is made is rubberlike and contains embedded magnetic particles, so as to render the element as a whole magnetic.

In use, when the spout 4 is inserted down into the fillpipe 5, the inherent resiliency of the bellows 8 provides enough downwardly acting force to position the sealing assembly 11 in contact with the outer end of the fillpipe 5. The magnetic attractive forces between the magnetic element 13 and the metallic fillpipe 5 then provide the force to make a flat face vaportight seal against the outer end of the fillpipe, thus forcing vapors which issue from this end of the llpipe to travel through the annular space between the spout 4 and the inner diameter of element 12, intothe interior of bellows 8. It may be noted here that the interior of bellows 8 is thus coupled to the fillpipe 5.

The ferromagnetic pole pieces 12 and 14 greatly enhance the strength of the magnetic attractive forces between the magnetic element 13 and the outer end of the metallic fillpipe 5.

As gasoline is used from a motor vehicle fuel tank, the empty space created in the tank by withdrawing gasoline fills with gasoline vapors that are generally in thermodynamic equilibrium with the liquid gasoline phase remaining in the tank. When the tank is refilled with gasoline by way of nozzle 1 and spout 4, these vapors are forced out of the tank and travel upwardly in tillpipe 5, to its upper-end. Thesedisplaced vapors are forced to travel around the outside of spout 4 into the bellows 8, because of the vaportight seal between the outer end of fillpipe 5 and assembly 11. The displaced vapors are collected in the bellows 8 and are sent back to the housing of the gasoline dispensing apparatus through a hose which is strapped to the normal gasoline delivery hose and is connected at its outer end to the coupling 10 at the upper end of the bellows.

At the dispensing apparatus housing, the vapors can either be condensed and the condensate then fed into the dispensing hose, or they can be returned to the underground gasoline storage tanks by a suitable piping arrangement.

The vapor seal arrangement of this invention has several advantages, among which may be mentioned the following:

l. The bellows and flat face seal combination can be attached to presently used dispensing nozzles.

2. The vapors can be returned to the dispensing apparatus housing, condensed, and then dispensed as fuel. This feature could prove to be economically attractive, since the displaced vapors contain hydrocarbons in the amount of approximately 0.2 percent ofthe fuel delivered.

3. The recovery of the vapors (as contrasted to their release to the atmosphere) reduces the fire hazard presented to the operator.

4. lf the vapors are collected, the hydrocarbons in the air can be substantially reduced, thus helping in the air pollution problem.

5. With a face seal such as described, blow-back and spillage are substantially eliminated.

6. Higher pumping rates are possible when using the attachment of this invention, as compared to a nozzle without the attachment.

7. Less foam is developed during the tank filling operation, thus ensuring a sharper automatic shutoff for a full tank.

8. No top-off" is required, in contrast to a conventional nozzle.

It has been found, in tests carried out with a device actually built according to the teachings of this invention, that a fully vaportight seal can be formed with substantially all ofthe various vehicle gasoline tank tillpipes now in use and now known. Thus, the device has been proved to be very effective and efficient.

I claim:

1. In combination, a liquid fuel dispensing nozzle with a discharge spout for insertion into the metallic fillpipe of a motor vehicle fuel tank, an elongated continuous imperforate flexible bellows 0f cylindrical outer configuration sealed at one end thereof to the body of said spout, said bellows surrounding said spout in spaced relation thereto to provide a chamber therearound, said chamber being coupled to the interior of said llpipes; and separate means carried by the other end of said bellows for forming a positive flat face seal against the outer end of said llpipe.

2. Combination of claim 1, including also a coupling at said one end of said bellows constructed and arranged to enable vapors to be abstracted from said chamber.

3. Combination according to claim l, wherein said separate means includes a flat magnetic sealing element secured to said other end of said bellows and held against the outer end of said llpipe by magnetic attractive forces.

4. Combination set forth in claim 3, including also a coupling at said one end of said bellows constructed and arranged to enable vapors to be abstractedpfrom said chamber.

Patent Citations
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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3710830 *Aug 31, 1970Jan 16, 1973S GilsonHydrocarbon vapor collecting apparatus
US3739988 *Dec 16, 1971Jun 19, 1973Husky CorpLiquid discharge nozzle and splash baffle
US3771577 *Dec 2, 1971Nov 13, 1973Texaco IncAutomatic fuel dispensing nozzle
US3826291 *Dec 11, 1972Jul 30, 1974Mobil Oil CorpDispensing volatile hydrocarbon fuels
US3840055 *Aug 15, 1973Oct 8, 1974Atlantic Richfield CoVapor recovery apparatus
US3897810 *Jul 5, 1973Aug 5, 1975Ford Motor CoSealed fluid coupling
US3899009 *Feb 1, 1973Aug 12, 1975John C TaylorFuel nozzle vapor return adaptor
US3903942 *Nov 6, 1972Sep 9, 1975Texaco IncVapor seal for fuel tank filler tube
US3907010 *Oct 26, 1973Sep 23, 1975William C BabcockAnti-pollution service station assembly
US3907153 *Feb 19, 1974Sep 23, 1975Gen Motors CorpFuel tank venting system
US3921412 *Jul 18, 1974Nov 25, 1975Rohr Industries IncVapor recovery apparatus employing dispensing nozzle with condensing capacity
US3929175 *Jun 28, 1974Dec 30, 1975Lynes IncVapor recovery fuel nozzle apparatus
US3995670 *May 22, 1975Dec 7, 1976Atlantic Richfield CompanyLiquid-dispensing nozzle assembly
US3996979 *Jul 8, 1974Dec 14, 1976A. Y. Mcdonald Mfg. Co.Vapor recovery nozzle
US4105054 *Feb 11, 1977Aug 8, 1978Atlantic Richfield CompanyVapor sealing means for fuel dispensing nozzles
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US5129432 *May 22, 1991Jul 14, 1992Dugger Michael DVapor collection assembly for fuel dispensing nozzle
US5365985 *Nov 18, 1993Nov 22, 1994Dresser Industries, Inc.Vapor guard for vapor recovery system
US5823237 *Dec 2, 1996Oct 20, 1998Alvern-Norway A/SProtective cover for a fuel pump filler gun and method for protecting same
US5860462 *Jul 12, 1996Jan 19, 1999Alvern-NorwayProtective cover for a fuel pump filler gun and method for protecting same
US5904191 *Jun 24, 1996May 18, 1999Alvern-Norway A/SProtective cover for a fuel pump filler gun
US5921283 *Sep 30, 1996Jul 13, 1999Alvern-Norway A/SProtective cover for a fuel pump filler gun and method for protecting same
US6957674Jan 6, 2004Oct 25, 2005Burr Joe ALocking fuel nozzle
US9222604 *Dec 28, 2012Dec 29, 2015Wayne Fueling Systems Sweden AbSeal device for conduit in a fuel dispensing unit
US20040197161 *Apr 4, 2003Oct 7, 2004Gonzalez Luis A.Metric/standard magnetic motor oil plug
US20140097577 *Dec 28, 2012Apr 10, 2014Wayne ABSeal device for conduit in a fuel dispensing unit
US20150159762 *Dec 5, 2013Jun 11, 2015GM Global Technology Operations LLCSeal assembly
DE3318663A1 *May 21, 1983Nov 22, 1984Keitz Robert Von KgFilling nozzle
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U.S. Classification141/97, 141/392, 285/9.2
International ClassificationF16K21/00, F23K5/14, F16J15/50, F23K5/02, F16J15/52, F16K21/20, F16J3/04, F16J3/00, B67D7/54, B67D7/42
Cooperative ClassificationB67D7/54, F16J15/52, F16J3/046
European ClassificationF16J15/52, F16J3/04B8, B67D7/54