Mechanical control system in flow devices

Details Mechanical control system in flow devices Mechanical control system in flow devices

1986-01-24

1987-07-28

Schwadron, Martin P.

Valves and valve actuation

Tube compressors

251 5, 251 7, 251252, 251284, 251292, F16K 31524, F16L 5514

Patent

active

046827552

ABSTRACT:
A pinch valve includes a housing with a quarter-turn closure mechanism disposed within the housing for adjustment of a spool-sleeve. The mechanism consists of two cam members rotatably supported in the housing on the opposite sides of the sleeve and connected to a hub via drive links. The hub is disposed proximate an opening in the housing and is rotated manually by a handle, or automatically by an actuator. Each cam member includes a first portion which is rotatable across the sleeve and a shank portion which is eccentrically disposed on the first portion and traverses the sleeve profile. As the cam members are rotated the shank portions move transversely of the sleeve longitudinal axis, toward and away from one another for pinching the sleeve and thereby selectively throttling or stopping the flow through the system. When rotated to a fully retracted or release position, the shank portions are completely withdrawn from the outside profile projection of the sleeve, whereby the sleeve can be removed axially from the housing. The pinch valve also may have motive fluid means for pinching the sleeve.

REFERENCES:
patent: 2112592 (1938-03-01), MacClatchie
patent: 2842331 (1958-07-01), Anderson
patent: 3197173 (1965-07-01), Taubenheim
patent: 3982723 (1976-09-01), Ford et al.
patent: 4029120 (1977-06-01), Christianson
patent: 4073467 (1978-02-01), Little et al.
patent: 4193579 (1980-03-01), Massey
patent: 4322054 (1982-03-01), Campbell
patent: 4372345 (1983-02-01), Mehus
patent: 4572239 (1986-02-01), Koch et al.

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