Fluid handling – Control by change of position or inertia of system – Vent opening or closing on tipping container
Patent
1979-01-10
1981-06-23
Nilson, Robert G.
Fluid handling
Control by change of position or inertia of system
Vent opening or closing on tipping container
137 45, F16K 1736
Patent
active
042744318
ABSTRACT:
A fuel tank vent apparatus is described with an improved gravity actuated valve for preventing liquid fuel spillage. A weight pivotally supported above the valve acts as a plumb weight for operating a movable valve member connected thereto to close the valve when the vent apparatus is tipped. In the one embodiment the plumb weight is hung on a chain that is also connected to the valve member. The fuel vent apparatus is especially useful on the fuel tank of an automobile or truck in that it enables gaseous fuel vapor to be vented from the tank through a passageway, thereby preventing pressure buildup within the tank while also employing in such passageway the gravity operated valve which is closed when the truck turns over or tips at an angle greater than a predetermined angle to prevent the leakage of liquid fuel through such vent. In one embodiment, the fuel vent apparatus also includes a gas pressure check valve for preventing the internal pressure within the tank from falling below the outside atmospheric pressure, which tends to hold the gravity valve closed and would otherwise prevent proper venting. In another embodiment the chain supporting the weight and connecting such weight to the valve member is replaced by link rods attached by ball and socket connections.
REFERENCES:
patent: 224736 (1880-02-01), Shea
patent: 704529 (1902-07-01), Foskett
patent: 1486985 (1924-03-01), Monahan
patent: 1683338 (1928-09-01), Evinrude
patent: 1717573 (1929-06-01), McAtee
patent: 1992151 (1935-02-01), Woodbridge
patent: 2355288 (1944-08-01), Fritzinger
patent: 2813142 (1957-11-01), Lindberg
patent: 3757987 (1973-09-01), Marshall
patent: 3918606 (1975-11-01), Keller
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