Patent ID: 6655256
Filing Date: 2003-12-02
Classification: F15B,F16K

Abstract:
A dual end stop for a valve actuator, said valve actuator comprising an actuator housing, said actuator housing having a zone for pressure containment, a rotary drive element rotatably mounted within said actuator housing, a stop element having a first stop surface and a second stop surface, said dual end stop comprising:a first stop member having a first end stop, said first end stop having a first tapering end which tapers to a first end point, said first tapering end point being engageable with said first stop surface for point contact to thereby stop said rotary drive element in a first rotational position, said first stop member being moveable in a direction substantially perpendicular to a position of said first stop surface when said first stop member engages said first stop surface throughout an entire range of adjustment of first stop member with respect to said first stop surface; and a second stop member having a second end stop, said second end stop having a second tapering end which tapers to a second end point, said second tapering end point being engagable with said second stop surface for point contact to thereby stop said rotary drive element in a second rotational position. said second stop member being moveable in a direction substantially perpendicular to a position of said second stop surface when said second stop member engages said second stop surface throughout an entire range of adjustment of second stop member with respect to said second stop surface.