Data processing: measuring – calibrating – or testing – Testing system – Of mechanical system
Reexamination Certificate
2005-07-19
2005-07-19
Barlow, John (Department: 2863)
Data processing: measuring, calibrating, or testing
Testing system
Of mechanical system
C702S113000
Reexamination Certificate
active
06920409
ABSTRACT:
Apparatus for testing an emergency valve in which a valve member (10) is movable by fluid-operated actuator (11) between a normal (open or closed) position and an emergency position (closed or open respectively). The apparatus comprises partial stroking means including means (32, 23, 22to13) for initiating emergency movement of the valve from its normal towards its emergency position, and means (13, 14) for returning it from a predetermined position intermediate the normal and emergency positions at its normal operating speed. The apparatus includes means for detecting the loss of the controlling electrical signal to the valve and a means (51) for detecting the correct operation of the valve and its associated operating components by measuring the pressure of fluid being released from or being applied to the actuator (11).
REFERENCES:
patent: 3485082 (1969-12-01), Myers
patent: 4951224 (1990-08-01), Hokynar
patent: 5048329 (1991-09-01), Marchini
patent: 5665898 (1997-09-01), Smith et al.
patent: 5748469 (1998-05-01), Pyotsia
patent: 5751606 (1998-05-01), Migachyov et al.
patent: 6089269 (2000-07-01), Essam
patent: 6591201 (2003-07-01), Hyde
patent: 6722383 (2004-04-01), Summers et al.
patent: 6795780 (2004-09-01), Hyde
patent: 3638844 (1988-05-01), None
patent: 3638844 (1988-05-01), None
patent: 3837882 (1989-05-01), None
patent: 2332939 (1999-07-01), None
patent: 2332939 (1999-07-01), None
patent: 2346672 (2000-08-01), None
patent: 2346672 (2000-08-01), None
Barlow John
Dowell & Dowell , P.C.
Drallim Industries Limited
Washburn Douglas N
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