Gas tap

Details Gas tap Gas tap

1998-01-22

2000-08-15

Walton, George L.

Valves and valve actuation

Mechanical movement actuator

Screw

137 6811, 251214, F16K 3150, F16K 1740

Patent

active

061023671

ABSTRACT:
A gas tap comprising an external operating element and a connecting stem for transmitting the movement of the operating element to the opening and closure member which is arranged in such a way as to be held against the sealing seat under the effect of the pressure of the gas. To make opening against the pressure of the gas easier, the operating element comprises a cylindrical sleeve which has a first screw thread that makes the sleeve move axially when the operating element is turned and a second screw thread of opposite hand to the first screw thread and with different screw pitch so as to alter the effect brought about by the first screw thread.

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