Hand control valve

Details Hand control valve Hand control valve

1993-11-01

1994-08-23

Walton, George L.

Valves and valve actuation

Valve head movably connected for accommodation to seat

With yieldable connection

251122, 251243, F16K 2500, F16K 3160

Patent

active

053400798

ABSTRACT:
A hand operated control valve for venting fluid pressure from a fluid line including a valve body having a vent port being controlled by a needle valve having an elongated shaft. The upper end of the elongated is affixed by a lift rod having a looped configuration to a pivotal lever. Upper and lower springs resiliently apply forces to the lever. Depression of the lever lifts the needle valve to progressively creates a variable flow opening for venting.

REFERENCES:
patent: 504235 (1893-08-01), Nicole
patent: 538317 (1895-04-01), Boynton
patent: 612947 (1898-10-01), Kiernan
patent: 617655 (1899-01-01), Ormerod
patent: 1016956 (1912-02-01), Ramsey
patent: 1332310 (1920-03-01), Shaver
patent: 1526372 (1925-02-01), Pundzak
patent: 2035202 (1936-03-01), Smith
patent: 2866615 (1958-12-01), Hoesch
patent: 4677774 (1987-07-01), Macchi

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