Vacuum delay and shutoff valve

Details Vacuum delay and shutoff valve Vacuum delay and shutoff valve

1975-02-06

1977-01-11

Lazarus, Ronald H.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

F02M 2500

Patent

active

040021548

ABSTRACT:
A vacuum operated valve and vacuum delay device is disclosed. The device, which may be connected to a variable vacuum source and employed to serve a vacuum operated switch or valve, includes a bleed orifice for restricting the passage of air therethrough and delaying the effect of vacuum on the switch or valve being served. A spring-loaded diaphragm within the device, operable by the variable vacuum source, is adapted to dissipate vacuum to the valve or switch being served by venting it to atmospheric pressure when the vacuum source reaches a predetermined high level. The vacuum delay and shutoff valve is particularly suitable for serving an exhaust gas recirculation valve of an automobile.

REFERENCES:
patent: 2154417 (1939-04-01), Anderson
patent: 3834366 (1974-09-01), Kingsbury
patent: 3885537 (1975-05-01), Diehl
patent: 3901202 (1975-08-01), Hollis

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