Valves and valve actuation – Fluid actuated or retarded – Dashpot or fluid controlled retarder or timer
Patent
1978-09-01
1980-04-15
Rosenthal, Arnold
Valves and valve actuation
Fluid actuated or retarded
Dashpot or fluid controlled retarder or timer
251 612, 92100, 137DIG8, 123 97B, 123119D, F16K 31126
Patent
active
041980280
ABSTRACT:
A deceleration valve for use in a vehicle emission controls system is responsive to increased engine manifold vacuum (thereby indicating a vehicle deceleration) to vent the vehicle air cleaner through the intake manifold for a controlled period of time to eliminate exhaust backfiring and to reduce hydrocarbon emissions. The valve mechanism includes a diaphragm assembly comprising an annular flexible member having an outer periphery clamped to the valve housing and an inner periphery clamped between a pair of diaphragm plates. One of the diaphragm plates has an axially projecting portion which extends through the opening in the flexible member. The other diaphragm plate has a plurality of axially extending, resilient legs which circumscribe the axially projecting portion of the first diaphragm plate and are yieldable in a radial direction so that they are able to snap into a groove on the axially projecting portion when the valve is assembled. The axially projecting portion also receives a barbed pin which connects the diaphragm assembly with the valve. A check valve is carried in the diaphragm assembly, to control communication across the assembly.
REFERENCES:
patent: 3377922 (1968-04-01), Spender et al.
patent: 3955364 (1976-05-01), Lewis
patent: 3982555 (1976-09-01), Aubel et al.
patent: 4052969 (1977-10-01), Ando et al.
patent: 4053543 (1977-10-01), Pettitt
Antonis William N.
Canadian Fram Ltd.
Decker Ken C.
Rosenthal Arnold
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