Valves and valve actuation – With correlated flow path – With mounting or support
Patent
1975-02-26
1976-03-30
Rosenthal, Arnold
Valves and valve actuation
With correlated flow path
With mounting or support
251 30, 251134, F16K 3105
Patent
active
039469859
ABSTRACT:
A valve device for gases comprises a pilot valve for controlling the degree of valve opening of a main valve installed in a gas pipe line, a main rotating shaft which can undergo rotation by which the degree of valve opening of the pilot valve is controlled, a sliding member actuated by the rotation of the main rotating shaft to undergo sliding movement in a specific range thereby to control the degree of valve opening of the pilot valve, an electric motor for rotating the main rotating shaft, a screw shaft to which the rotation of the main rotating shaft, after being multiplied in number of revolutions, is transmitted, a moving structure moved translationally by the rotation of the screw shaft, and limit switches disposed at limit positions defining the range of movement of the moving structure and being actuated when the moving structure reaches the limit positions thereby to cut off power supply to the motor. The range of movement of the moving structure is set greater than the range of sliding movement of the sliding member.
REFERENCES:
patent: 3700085 (1972-10-01), Balz
patent: 3720295 (1973-03-01), Balz
patent: 3845788 (1974-11-01), Laven
Fujita Tomomitsu
Imai Yoshiaki
Rosenthal Arnold
Tokico Ltd.
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