Electric motor actuated stop and self-closing check valve

Details Electric motor actuated stop and self-closing check valve Electric motor actuated stop and self-closing check valve

2005-08-16

2005-08-16

Keasel, Eric (Department: 3754)

Valves and valve actuation

Lost motion between actuator and valve

Check valve with external opening and closing means

C251S054000, C251S129030

Reexamination Certificate

active

06929238

ABSTRACT:
An electric motor actuated stop/check valve for industrial use such as liquid pumping systems which has a controlled opening and closing rate when liquid flow is in a forward direction but closes quickly upon reverse flow of liquid with no action from the electric motor actuator. A valve disc having an elongated disc stem contacts a valve seat when in a closed position to stop liquid flow. Actuation of the valve is by an electric motor which provides movement to an actuator rod which contacts the disc stem. The disc stem and the actuator rod are not connected which allows the valve disc and disc stem free movement, by action of the momentarily back-flowing liquid, to a back-flow preventing closed position when liquid forward flow is reversed. No action by the electric motor is required. A spring biasing the valve disc toward the closed position and a hydraulically operated valve closing-speed regulator reduces or eliminates slamming of the valve disc against the valve seat. In a preferred method of operation liquid surge pressure transients are reduced or eliminated and slamming of valve components is prevented.

REFERENCES:
patent: 2135243 (1938-11-01), Swain
patent: 2621015 (1952-12-01), MacGregor
patent: 3707987 (1973-01-01), Gordon
patent: 4008735 (1977-02-01), Thompson
patent: 4364541 (1982-12-01), Chabat-Courrede et al.
patent: 4596263 (1986-06-01), Snider
patent: 4667696 (1987-05-01), van Rensburg
patent: 4945941 (1990-08-01), Kocher
patent: 5036876 (1991-08-01), Jernberg
patent: 5540558 (1996-07-01), Harden et al.
patent: 6126409 (2000-10-01), Young
patent: 941148 (1963-11-01), None

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