Fluid handling – Control by change of position or inertia of system – With second control
Patent
1982-03-01
1984-07-03
Nilson, Robert G.
Fluid handling
Control by change of position or inertia of system
With second control
137 43, 137 73, 137202, 137331, 220203, 220210, F16K 1736
Patent
active
044573251
ABSTRACT:
A fuel tank cap (10,130) having a venting valve (56,56A) adapted to relieve pressure and temperature in the tank and prevent spilling fuel from the tank. A cover plate (28,28A) is automatically (34,34A) removed from the cap by excessive temperature so as to allow fluid in the tank to escape. The valve body (56) has a spin chamber (98), having generally circular cross sections (102,104) and at least one tangentially directed side wall inlet opening (106). The chamber cross sections decrease in diameter upwardly of the inlet opening (88) to a point below a circular outlet opening whereby gas venting through the chamber spins a light weight buoyant ball (94) around the chamber so as to prevent the ball from closing during venting. The ball (94) is lifted onto a seat (92) at the outlet to close it when liquid enters the chamber to a predetermined level. A heavy ball (96) in the chamber holds the light ball (94) on the seat when the chamber has been tilted a predetermined amount. A second heavy ball (90), externally of the chamber in the cap body (30) adjacent the outlet opening (88), moves the light weight ball (94) off the seat when the liquid is below a predetermined level and the chamber is not tilted so that the outlet will be open for venting. Venting occurs through the valve body and through the cap body (30) under the cap cover plate (28) to openings (42) at the periphery of the cap cover plate.
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Barnard Delbert J.
GT Development Corporation
Nilson Robert G.
Pauly Joan H.
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