Plastic gate valve

Details Plastic gate valve Plastic gate valve

1985-03-27

1987-06-30

Chambers, A. Michael

Fluid handling

With casing, support, protector or static constructional...

Jacketed

137556, 251266, 251368, F16L 700

Patent

active

046762680

ABSTRACT:
A plastic gate valve including a plastic valve casing having a passage and a valve chamber therein; a spindle extending in the valve chamber and rotatably supported by the valve casing; a handle connected with the spindle and rotating it; and a plastic valve body engaged with the spindle and moving along an inner wall of the valve chamber in response to the rotation of the spindle whereby the valve body opens and shuts the passage. The valve body is made of heat-resistant rigid vinyl chloride resin and covered with rubber-like elastic material by means of vulcanization adhesion so as to be integral with the valve body.

REFERENCES:
patent: 1947257 (1934-02-01), Fritz et al.
patent: 2194264 (1940-03-01), Abercrombie et al.
patent: 2202735 (1940-05-01), Johnson
patent: 2859932 (1958-11-01), Mackal
patent: 3217735 (1965-11-01), Statler
patent: 3595523 (1971-07-01), Felton
patent: 3738383 (1973-06-01), David
patent: 3778028 (1973-12-01), Graves et al.
patent: 4025050 (1977-05-01), Manki et al.
patent: 4213480 (1980-07-01), Orum et al.
patent: 4348006 (1982-09-01), Schmitt et al.

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