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Publication numberUS3389715 A
Publication typeGrant
Publication dateJun 25, 1968
Filing dateJun 3, 1965
Priority dateJun 16, 1964
Publication numberUS 3389715 A, US 3389715A, US-A-3389715, US3389715 A, US3389715A
InventorsHebard Hugh Charles, Dearing Bertram Stanley
Original AssigneeAladdin Ind Ltd
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Self-closing venting device for liquid containers
US 3389715 A
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Description  (OCR text may contain errors)

June 25. 1968 H. c. HEBARD ETAL 3,339,715

SELF-CLOSING VENTING DEVICE FOR LIQUID CONTAINERS Filed June 5, 19 5 [fliIENTDRS HUGH cuARuEs HEBARD Gem-Ram s-mvuel Mme United States Patent 3,389,715 SELF-CLOSING VENTING DEVICE FOR LIQUID CONTAINERS Hugh Charles Hebard, High Wycombe, and Bertram Stanley Dearing, Ickenham, England, assignors to Aladdin Industries Limited, Greenford, England, a British company Filed June 3, 1965, Ser. No. 461,005 Claims priority, application Great Britain, June 16, 1964, 24,909/64 3 Claims. (Cl. 137-43) ABSTRACT OF THE DISCLOSURE A valve arrangement for preventing leakage from the vented cap of an accidentally tilted or overturned container comprises a normally open movably mounted valve element moved to closed position in response to movement of a weight caused by tilting of the container. In each embodiment the valve is in the filler cap for the container. In one embodiment the valve is centered by a spring and its generally vertical stem extends through a concave surface where it is frictionally engaged by a weight in the form of a free ball movable along that surface. When the container is vertical the weight of the ball which maintains contact with the stem is sufiicient to rockably displace the stem from vertical and hold open the valve, but when the container is tilted the ball rolls laterally with respect to the stem and the stem rocks to close the valve under influence of the spring. In another embodiment a weight hangs on a pin extending through a slotted pivoted lever, and when the container is tilted the weight moves to tilt the lever and close a vent in the cap.

This invention relates to an improved valve for a liquid container designed to prevent the outflow of liquid in the event of accidental tilting or overturning of the container. The invention is particularly, but by no means exclusively applicable to fuel reservoirs of liquid fuel burning heating appliances.

According to the invention in its broadest aspect there is provided in or for a liquid container an automatic valve comprising a movable valve member which is normally open but is adapted to be moved into the closed position as the result of the movement of a weight caused by tilting the container.

Two embodiments of the invention are shown respectively in FIGS. 1 and 2 of the accompanying drawings and will now be described. In each of these embodiments the valve is in the filler cap of the fuel tank of a liquid fuel burning appliance.

Referring to FIG. 1, an elongated lower valve body 1 has at its bottom a seat 2 for a valve member 3. The latter is fixed to a valve stem 4 and a compression spring 5 tends to centre the stem 4 in the body and close the valve. The stem extends upwards through a central hole 6 in the upper valve body 7, which hole is surrounded by a dished rim 8. The latter has an inclined angle of approximately 150 degrees. A cover 9 is provided with an opening or vent 10 and serves to contain a weight in the form of a ball 11 of the type used for example in a ball bearing.

In operation, so long as the tank is level, the weight of the ball is suflicient to displace the valve stem 4 from 3,389,715 Patented June 25, 1968 ice its central position and the valve member 3 is made wide enough to ensure that such displacement opens the valve, as shown in FIG. 1. As soon as the tank is tilted, say beyond 15 degrees, the ball rolls away from the valve stem and, under the pressure of spring 5 the stem assumes a central position in the body 1 so that the valve closes.

In the second embodiment shown in FIG. 2, use is made of a short horizontal lever 12 pivoted at one end on a member 13 and carrying at the other end a valve member in the form of a small rubber pellet 14 adapted to close a vent or oil hole 15. The latter is in communication with an external vent or oil hole 16 in the hollow cap 17. A headed pin 18 is arranged toproject downwards through a slot in the lever 12, the head 19 being adapted to engage a counter-bored weight 20 so as to form a universal joint. The pin is adjusted to a length which just allows the valve to remain open under gravity, so long as the weight hangs vertically, as shown in FIG. 2. In operation, as soon as the tank is tilted through a small angle, say 15 degrees, the top of the weight, using the head of the pin as a fulcrum, raises the lever and, no matter in what direction the container is tilted, the raising of the lever under the influence of the weight is such as to cause the rubber pellet 14 to close the vent or oil hole 15.

It will be understood that the above described embodiments are given by way of illustration only. The invention also extends to other types of automatic valves adapted to close when the tank or container is tilted through a small angle and which do not rely on mechanical means external to the tank for closure of the valve.

We claim:

1. A vent valve for a liquid container, comprising a valve body having means by which it is adapted to be rigidly secured to the container and provided with an aperture for the admission of air thereto, a valve member movably mounted on said valve body and disposed to remain out of closing engagement with said aperture when the valve body is in its normal position, and a weight freely suspended from said valve body at a point offset from said aperture and so operatively connected to said valve member as to be operative in response to tilting of the valve body to urge siad valve member into closing engagement with said aperture.

2. In the vent valve defined in claim 1, a lever pivoted adjacent one end on said valve body, said valve member being mounted at the other end of said lever and said weight being operatively connected to said lever intermediate said ends of the lever.

3. In the vent valve defined in claim 2, there being a fixed downward projection on said valve body extending freely through an opening in said lever, and said weight being carried by said projection in operative association with the underside of said lever.

References Cited UNITED STATES PATENTS 733,109 7/1903 Young 13743 2,113,454 4/ 1938 Mitchell 13743 2,684,683 7/1954 Brown 13743 2,813,142 12/1957 Lindberg 137-43 X 3,242,937 3/ 1966 Morin 137-43 X FOREIGN PATENTS 470,171 8/ 1937 Great Britain.

CLARENCE R. GORDON, Primary Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US733109 *Dec 18, 1902Jul 7, 1903Ernest A YoungAutomatic valve attachment for oil-cans.
US2113454 *Oct 19, 1936Apr 5, 1938Mitchell Charles MVent valve
US2684683 *Nov 5, 1952Jul 27, 1954Brown Steel Tank CompanySafety closure for truck and trailer tank bodies
US2813142 *Mar 5, 1953Nov 12, 1957Svenska Ackumulator AbSelf-closing venting devices for electric storage batteries and the like
US3242937 *Jan 16, 1963Mar 29, 1966Adelard MorinSafety valve for gasoline tanks having plural control means
GB470171A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3698160 *Jul 16, 1970Oct 17, 1972Chrysler CorpMotor vehicle fuel tank venting
US4185651 *Jun 30, 1977Jan 29, 1980Paulson Eugene KInertially triggered fluid flow control device
US4299247 *Jan 3, 1980Nov 10, 1981Keller Russell DFuel tank vent
US5242072 *Jan 29, 1993Sep 7, 1993The Kelch CorporationVented fuel tank cap
US5564520 *Jun 20, 1994Oct 15, 1996Gt Development CorporationPneumatic seat rollover vent valve
US5590736 *Sep 8, 1995Jan 7, 1997Gt Development CorporationVehicle pneumatic seat rollover safety vent valve
US6928814 *Jan 23, 2004Aug 16, 2005Lucas Automotive GmbhHydraulic fluid container for a vehicle hydraulic brake system
WO1997009204A1 *Sep 5, 1996Mar 13, 1997Gt Dev CorpVehicle pneumatic seat rollover safety vent valve
U.S. Classification137/43, 220/202
International ClassificationF17C13/12, F16K24/04, F23Q25/00
Cooperative ClassificationF23Q25/00, F17C13/12, F16K24/04
European ClassificationF23Q25/00, F16K24/04, F17C13/12
Legal Events
Feb 25, 1986ASAssignment
Effective date: 19851016
Feb 1, 1985ASAssignment
Effective date: 19850125
Jan 11, 1983ASAssignment
Effective date: 19820521
Jan 11, 1983AS02Assignment of assignor's interest
Effective date: 19820521