Rotary actuator valve closure apparatus

Fluid handling – Ambient condition change responsive – Atmospheric

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251 14, 251 59, 251 3001, F16K 1736

Patent

active

059751061

ABSTRACT:
The present invention relates to a novel single acting, valve closing actuator that when actuated is capable of closing an attached existing plug or gate valve, one that opens and closes within one quarter turn of operation. The newly designed actuator is cylindrically quadrant shaped and utilizes an extensible air bladder to actuate an internal rigid vane, causing the attached vane shaft to rotate, thereby closing a connected existing valve. In the preferred embodiment, the air bladder is comprised of a laminate of silicone rubber bonded to an exterior coating made of Kevlar. In an alternative embodiment, two air bladders are used to provide a double acting actuator, where a remote valve reset can be accomplished. Independent stand-alone operation is provided by using a pressurized source of CO.sub.2 to inflate the air bladder and a rechargeable battery to operate the air solenoids.

REFERENCES:
patent: 3752041 (1973-08-01), Smith
patent: 3845783 (1974-11-01), De Lepeleire
patent: 3945565 (1976-03-01), Lynch et al.
patent: 3955186 (1976-05-01), Green et al.
patent: 5101862 (1992-04-01), Leete
patent: 5181452 (1993-01-01), Immega
patent: 5211195 (1993-05-01), Hamos
patent: 5427350 (1995-06-01), Rinkerwich
patent: 5579801 (1996-12-01), Pye et al.

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