Vacuum modulator valve and subassembly therefor

Details Vacuum modulator valve and subassembly therefor Vacuum modulator valve and subassembly therefor

1979-10-29

1982-02-23

Cohan, Alan

Fluid handling

Pressure modulating relays or followers

With counter-balancing pressure feedback to the modulating...

236 13, G05D 1600

Patent

active

043164790

ABSTRACT:
A vacuum regulator valve (10) is disclosed comprising a force-balance modulator valve subassembly (114, 118, 119, 122, 124, 126) mounted to a housing (12, 30) having inlet (14) and outlet (16) fluid ports. A vent insert (114) is adjustably biased through a biasing spring (166) by a rotary cam arrangement which includes a spring (64) biased rotary input member (48) rotatably mounted on a housing tubular projection (40). A ring-shaped drive member (144) is rotatable with input member (48) and supports a cup-shaped cam member (154). As projections (152) on the reaction member (144) rotate relative to cam surfaces (160), the cam follower is moved linealy relative to the vent insert. Locking tabs (50, 146, 148, 150) and alignment grooves (46, 80, 96, 98) enable the cam arrangement to be assembled in a predetermined angular position and locked to the housing without fasteners. An externally accessible adjustment member (162) enables valve calibration after final assembly. A dish-shaped spring (138) reacts against the vent insert and plate members (134, 136) for stabilizing and centering the vent insert.

REFERENCES:
patent: 4245780 (1981-01-01), Franz

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