Valves and valve actuation – With means for blocking or disabling actuator – Released by non-valving actuator motion
Patent
1993-03-23
1994-02-15
Walton, George L.
Valves and valve actuation
With means for blocking or disabling actuator
Released by non-valving actuator motion
251102, 251110, F16K 3502
Patent
active
052859975
ABSTRACT:
A device for locking a lever for pivoting a valve contained in a valve housing. A recess is formed in the valve housing. An annular groove is formed in the recess. A spring is sited in the recess. A latch has a relatively large middle section connecting an upper section with a lower section. The latch is sited in the recess so that the lower section thereof is inserted in the spring and that the middle portion thereof is sited on the spring. A C-ring engages in the groove so that the latch is trapped in the recess. A hole is formed in the lever. The hole has an upper section and a relatively large lower section. A wedge surface is formed on the underside of the lever. A button has a body connecting with a relatively large head and a groove formed about the body. The body of the button is inserted through the upper section of the hole. A C-clip engages in the groove formed about the body so that the button is trapped in the hole. The spring biases the upper section of the latch into the hole when the recess aligns with the hole so that the lever is retained in an open position. The upper section of the latch moves into the recess when the button is pressed, so that the lever is released from the open position. The wedge surface presses the upper section of the latch into the recess while passing by the same so that the recess can align with the hole.
REFERENCES:
patent: 506087 (1893-10-01), Adkins
patent: 557943 (1896-04-01), Bayley
patent: 1928186 (1933-09-01), Prisk
patent: 1940797 (1933-12-01), Halvorsen
patent: 2081464 (1937-05-01), Stewart
patent: 2158574 (1939-05-01), Feiks
patent: 2853100 (1958-09-01), Donnelly
patent: 2872216 (1959-02-01), Kaiser
patent: 3319671 (1967-05-01), Wiseman
patent: 3648970 (1972-03-01), Hartmann et al.
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