Two-stage ORVR control valve

Details Two-stage ORVR control valve Two-stage ORVR control valve

1998-08-25

2000-05-16

Jacyna, J. Casimer

Fluent material handling, with receiver or receiver coacting mea

Automatic control of flow cutoff or diversion

Level or overflow responsive

141 59, 137 43, 137202, F16K 1704

Patent

active

060622768

ABSTRACT:
A refueling fuel level responsive control valve with a two-stage closing operation providing an initial soft shutoff cue to the filler nozzle operator, and a subsequent final shutoff after a limited amount of "roundoff" filling to a maximum fuel level. The control valve includes two float-operated valve elements which close serially in response to initial shutoff and final shutoff refueling fuel levels. The initial shutoff partially closes the control valve to create a temporary shutoff-inducing increase in fuel tank pressure. Final shutoff occurs after allowing a few round-off "clicks" of the filler nozzle to fully close venting through the control valve.

REFERENCES:
patent: 4699638 (1987-10-01), Harris
patent: 4756328 (1988-07-01), Sherwood
patent: 4953583 (1990-09-01), Szlaga
patent: 5014742 (1991-05-01), Covert et al.
patent: 5028244 (1991-07-01), Szlaga
patent: 5044389 (1991-09-01), Gimby
patent: 5215132 (1993-06-01), Kobayashi
patent: 5678590 (1997-10-01), Kasugai et al.
European Search Report Aug. 5, 1998.

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