Valves and valve actuation – With means for blocking or disabling actuator
Patent
1989-10-18
1990-05-29
Walton, George L.
Valves and valve actuation
With means for blocking or disabling actuator
251278, 251291, 251297, 2513352, F16K 3150, F16K 3500
Patent
active
049289195
ABSTRACT:
There are provided coned disc springs and an intermediate transmission member in order between a thrust threaded member for generating the valve closing thrust and a valve body, and the intermediate transmission member is adapted to be urged by means of the coned disc springs toward the valve closing side with respect to the thrust threaded member. A contact receiving means is so arranged as to limit the movement of the thrust threaded member toward the valve closing side, and a contact receiving position of the contact receiving means is set at a midway position of the compression range of the coned disc springs. Wherein, the handle is adapted to be changed over between the handle held condition and the handle released condition by the relative movement of the intermediate transmission member with respect to the thrust threaded member.
REFERENCES:
patent: 3072135 (1963-01-01), Moskow
patent: 4043351 (1977-08-01), Durling
patent: 4531579 (1985-07-01), Larronde et al.
patent: 4768543 (1988-09-01), Wienke et al.
Daicho Norio
Kawahara Masakatsu
Miyazaki Koji
Nitta Jiro
Yonezawa Keitaro
Kabushiki Kaisha Neriki
Walton George L.
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