Positive opening pinch valve

Details Positive opening pinch valve Positive opening pinch valve

1990-12-04

1992-01-07

Schwadron, Martin P.

Valves and valve actuation

Tube compressors

Perpendicularly reciprocating tube contacting element

251 4, 25112901, F16K 706

Patent

active

050783610

ABSTRACT:
A solenoid operated pinch valve has a flexible conductor with extensions on each side of the fluid passage for connecting to the valve frame and to a solenoid plunger. In a preferred mode the valve is normally closed by a spring and actuated open. In a preferred embodiment, the flexible fluid conductor is held in the frame at the ends to prevent transferral of stress from connectors and tubings to the pinch area of the valve. A portion of the fluid passage at the pinch area is especially shaped to reduce stress and fatigue on the flexible material. In other embodiments, valves may be normally open or actuated in both directions.

REFERENCES:
patent: 3508587 (1970-04-01), Mauch
patent: 3624800 (1971-11-01), Swick
patent: 4496133 (1985-01-01), Sule
patent: 4548382 (1985-10-01), Otting
patent: 4921206 (1990-05-01), Dunstan et al.

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