Pressure medium actuated valve

Details Pressure medium actuated valve Pressure medium actuated valve

1985-01-28

1986-05-20

Scott, Samuel

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

251 3001, 251 31, 91399, 91416, 92 85B, F16K 31124

Patent

active

045896275

ABSTRACT:
The pressure-medium-actuated valve has a pressure medium inlet, a pressure medium outlet and a cylinder. A piston which is connected to a lid is movable in the cylinder and subdivides the cylinder into a first piston chamber and a second piston chamber. Two relief lines, each comprising a control valve are connected to the piston chambers and extend to a pressure medium sink. A first connecting line comprising a control valve extends from the inlet to the first piston chamber and a second connecting line comprising a control valve extends from the inlet to the second piston chamber. A third connecting line is disposed in the wall of the valve body and extends at one end into the first connecting line. The other end of the third connecting line is connected to the cylinder at a place which, with the piston in the operative position, extends into the second piston chamber and, with the piston in the safety position, extends into the first piston chamber.

REFERENCES:
patent: 1490633 (1924-04-01), Peters
patent: 1641131 (1927-08-01), Baker et al.
patent: 2587539 (1952-02-01), Seaman
patent: 2635634 (1953-04-01), Thurber, Jr.
patent: 2867081 (1957-09-01), Black
patent: 3814375 (1974-06-01), Grotloh

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