Gate valve

Details Gate valve Gate valve

2006-09-05

2006-09-05

Keasel, Eric (Department: 3754)

Valves and valve actuation

Reciprocating valve

Gate

Reexamination Certificate

active

07100893

ABSTRACT:
A gate valve having a polymeric monolithic liner, the liner having cylindrical flange portions projecting from either side to form a fluid passageway through the liner, first and second housing portions forming a liner cavity, the liner being disposed in the liner cavity, a first face ring having a first cylindrical tubular portion and a first radially outwardly projecting, annularly extending face ring flange, the first tubular portion being received in the first annular flange portion of the liner, a second face ring having a second cylindrical tubular portion and a second radially outwardly projecting, annularly extending face ring flange, the second tubular portion being received in the second annular flange portion and a gate valve element slidably received in a valve element cavity formed in the liner.

REFERENCES:
patent: 2942841 (1960-06-01), Stillwagon
patent: 3844531 (1974-10-01), Grengs
patent: 4009727 (1977-03-01), Bailey
patent: 4112969 (1978-09-01), Still
patent: 4646407 (1987-03-01), Mayhew, Jr.
patent: 4773627 (1988-09-01), King et al.
patent: 4798365 (1989-01-01), Mayhew
patent: 4881719 (1989-11-01), Bowman
patent: 5014730 (1991-05-01), Fye
patent: 5223202 (1993-06-01), Hall
patent: 5338006 (1994-08-01), McCutcheon et al.
patent: 5464035 (1995-11-01), Heinecke

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