Valve

Details Valve Valve

1979-03-29

1980-12-16

Weakley, Harold W.

Valves and valve actuation

With means to increase head and seat contact pressure

With positive reduction

251309, F16K 2500

Patent

active

042391857

ABSTRACT:
The invention is a valve with a tapered plug that seats in a through flow passage in the body. The plug has a through opening so that by rotating the plug through 90.degree. one can control flow through the valve. The plug is tapered and, as it is rotated in the counter-clockwise direction to open, it is also lifted slightly from its seats. As it is rotated in the clockwise direction to close, the plug is pressed slightly down to form a sealing engagement with its seats. The combination of rotational and vertical movements--in effect a spiral motion--of the plug provide a valve that has an effective seal, ease of manipulation and full throttling with 1/4 turn of the tapered plug.

REFERENCES:
patent: 688298 (1901-12-01), Foss
patent: 845540 (1907-02-01), Ferguson
patent: 2076841 (1937-04-01), Heggem
patent: 2633326 (1953-03-01), Givens
patent: 2858097 (1958-10-01), Blowstren
patent: 3429553 (1969-02-01), Smith

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