Lock-out mechanism for empty/load changeover valve

Details Lock-out mechanism for empty/load changeover valve Lock-out mechanism for empty/load changeover valve

1994-03-03

1995-05-23

Ryznic, John E.

Expansible chamber devices

With releasable stop or latch means to prevent movement of...

Engages power element movable relative to working member

188151A, 188353, F15B 1526, B60T 1110

Patent

active

054171431

ABSTRACT:
A lock-out assembly having a latching mechanism by which means a plunger may be manually depressed and latched in a lock-out position in which a lock pin is pre-set by engagement with an actuator rod of an empty/load valve or the like, so that in response to axial extension of the actuator rod sufficient to align a locking groove in the actuator rod with the lock pin, locking engagement therebetween will occur to limit further axial extension of the actuator rod, without any further action on the part of the operator. Automatic disengagement of the lock pin from the locking groove of the actuator rod occurs in response to axial retraction of the actuator rod, by effecting disengagement of the latching mechanism to allow a return spring to reset the plunger.

REFERENCES:
patent: 1006239 (1911-10-01), Leftwich et al.
patent: 1668877 (1928-05-01), Stroup
patent: 1911634 (1933-05-01), Madden
patent: 2964141 (1960-12-01), Schlumbrecht
patent: 3365036 (1968-01-01), Forrester
patent: 4007815 (1977-02-01), Acre
patent: 4116113 (1978-09-01), Leclerc
patent: 4887944 (1989-12-01), Worby et al.

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