Patent ID: 8465000
Filing Date: 2013-06-18
Classification: E03B,F16K,Y10T

Abstract:
1. An electric motor actuated stop and self-closing check valve for controlling a forward-flow and a back-flow of a liquid in a liquid conveying line, comprising: A. a valve body having an inlet port and an outlet port relative to said forward-flow of said liquid; B. a valve seat disposed within said valve body intermediate said ports; C. a valve disc disposed within said valve body having an elongated disc stem which extends through said valve body, said valve disc and said disc stem being free to move along a longitudinal axis of said valve stem to either: D. a disc disposed outside said valve body that co-acts with said elongated disc stem; E. an electric motor operationally attached to said valve body; F. an actuator rod moveable by action of said electric motor to be disposed at either: G. a spring configured for providing a bias to said valve disc and said disc stem toward said closed position, whereby the spring only partially closes the valve to reduce the distance the valve disc must move to fully close as a result of back-flow of said liquid.