Valve

Details Valve Valve

Filed on

1979-03-29

Date issued

1980-12-16

Examiner

Weakley, Harold W.

Patent Class

Valves and valve actuation

SubClass

With means to increase head and seat contact pressure

SubSubClass

With positive reduction

Other Related Categories

251309, F16K 2500

Type

Patent

Status

active

Patent number

042391857

Description

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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