Liquid purification or separation – Structural installation – Separator ancillary to storage tank
Patent
1978-05-19
1981-05-05
Shoap, Allan N.
Liquid purification or separation
Structural installation
Separator ancillary to storage tank
137493, 210452, 220208, 220209, 220254, 220303, 220 86R, B65D 5116, B65D 5124
Patent
active
042657520
ABSTRACT:
A closure for the filler neck on a vehicle gas tank having a closure body with a central passage and an upper surface having a vent groove formed therein. The vent groove has a first end communicating with the hollow portion of the closure body and a second end adjacent the periphery of the closure body. A cap is secured to the closure body and a resilient gasket is secured between the cap and the upper surface of the closure body such that a convex surface formed on the cap engages the upper surface of the gasket adjacent the vent groove in a closure body to deflect a portion of the gasket into the groove to seal the vent groove. The gasket is sufficiently resilient to permit passage of fluid through the vent groove when a pressure differential exceeding a predetermined magnitude exists between the first and second ends of the vent groove such that pressure within the tank is vented to the atmosphere. A door having a periphery formed by a smooth, continuous convex surface is hingedly secured over the central passage through the closure body and is adapted to receive a gasoline nozzle which moves the door out of the path of the nozzle. The door is spring-urged upwardly into sealing engagement with the lower portion of the resilient gasket such that a negative pressure within the tank is relieved by drawing the door away from the gasket to allow equalization of the pressure. A modified form of the cap has a second door in a lower portion thereof to exclude nozzles exceeding a predetermined size and a screen and anti-syphoning device secured to the lower end thereof.
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Booth John F.
Crutsinger Gerald G.
E-Z Fill Corporation
Post, III Harry C.
Shoap Allan N.
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