Butterfly valves

Details Butterfly valves Butterfly valves

1988-08-09

1989-06-06

Chambers, A. Michael

Valves and valve actuation

With means to increase head and seat contact pressure

Seat pressed to valve

251214, 277206R, F16K 1228

Patent

active

048364991

ABSTRACT:
The present invention comprises a transport system having an annular inflatable seal which has an annular interior domed portion which expands as an integral unit until it contacts the edge of a butterfly valve which engages the domed portion to form a slight recess in the annular seal which provides an airtight and locking seal with the annular seal having a pair of annular resilient legs operable to return the annular interior domed portion to its original position to permit the butterfly valve to be opened.

REFERENCES:
patent: Re23613 (1953-01-01), Danks
patent: 1844641 (1932-02-01), De Wein
patent: 2705016 (1955-03-01), Saar
patent: 2939674 (1960-06-01), Anderson
patent: 2979350 (1961-04-01), Lansby
patent: 3074421 (1963-01-01), Borcherdt
patent: 3414234 (1968-12-01), Henrion
patent: 3540520 (1970-11-01), Abraham et al.
patent: 3638674 (1972-02-01), Forst et al.
patent: 4025050 (1977-05-01), Manki et al.
patent: 4026514 (1977-05-01), Sumner et al.
patent: 4103909 (1978-08-01), Hoffman et al.
patent: 4176675 (1979-12-01), Liberman
patent: 4254936 (1981-03-01), Schuurman
patent: 4289296 (1981-09-01), Krause
patent: 4325558 (1982-04-01), Poggio
patent: 4372530 (1983-02-01), Livorsi
patent: 4378104 (1983-03-01), Ben-Ur
patent: 4398731 (1983-08-01), Gorman et al.
patent: 4540457 (1985-09-01), LaValley

Affiliated with

Also associated with

Rating

Butterfly valves does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Butterfly valves, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Butterfly valves will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-34696