Valves and valve actuation – With means for blocking or disabling actuator – Attachments
Reexamination Certificate
2005-05-24
2005-05-24
Lopez, F. Daniel (Department: 3751)
Valves and valve actuation
With means for blocking or disabling actuator
Attachments
C251S089000, C251S326000, C092S017000
Reexamination Certificate
active
06896239
ABSTRACT:
An apparatus for locking a valve having a valve member movable between an open position and a closed position. The apparatus includes an actuator assembly, a locking base, a locking shaft, and a locking pin. The actuator assembly moves the valve member between the open position and the closed position. The locking base has a through-bore extending from the lower portion to an upper portion, a first thread provided on the upper portion, and a first locking bore extending transversely therethrough. The locking shaft reciprocally extends through the through-bore of the locking base and includes an upper end having a second thread that is selectively engagable with the first thread of the locking base when the valve member is in a predetermined position, and a second locking bore extending transversely through the locking shaft. The locking pin has a shackle bore configured and dimensioned to receive the shackle of a lock, wherein the locking pin is receivable through the first and second locking bores when the valve member is in as predetermined position and the first and second locking bores are aligned for locking the valve member in the predetermined position. A method of using the apparatus for locking a valve is also disclosed.
REFERENCES:
patent: 4162690 (1979-07-01), Anderson
patent: 4718637 (1988-01-01), Contin
patent: 5597184 (1997-01-01), Brenes et al.
patent: 5881998 (1999-03-01), Brenes
patent: 5884899 (1999-03-01), Brenes
patent: 5975492 (1999-11-01), Brenes
patent: 6293306 (2001-09-01), Brenes
patent: 6443426 (2002-09-01), Brenes
Dorsey & Whitney LLP
Fristoe Jr. John K.
Lopez F. Daniel
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