Valves and valve actuation – Mechanical movement actuator – Particularly packed or sealed
Patent
1989-05-22
1990-04-17
Walton, George L.
Valves and valve actuation
Mechanical movement actuator
Particularly packed or sealed
251225, 251264, 251330, 2513351, 277206R, F16K 4100, F16K 3150
Patent
active
049173553
ABSTRACT:
An improved stop valve eliminates the need for O-rings and washers. The valve contains a one piece unitary stem formed of resilient compressible plastic material. The stem contains three separate seals and fits within, extends through and is moveable in a valve sleeve. Operating the handle moves the stem axially between a first axial position in which the valve is fully open and a second axial position in which the valve is fully closed. The first seal is operative to provide a seal responsive to said stem being in the first axial position, the second seal means is operative to provide a seal responsive to said stem being in the second axial position, and the third seal is operative to seal in all axial positions.
REFERENCES:
patent: 1681981 (1928-08-01), Gilbert
patent: 1753833 (1930-04-01), Mueller
patent: 2457472 (1948-12-01), Hofferd
patent: 2784933 (1957-03-01), Newell et al.
patent: 3104090 (1963-09-01), Callahan, Jr.
patent: 3132569 (1964-05-01), Shepherd
patent: 3255775 (1966-06-01), Albro et al.
patent: 3327992 (1967-06-01), Billeter et al.
patent: 3356335 (1967-12-01), Koch et al.
patent: 3490736 (1970-01-01), Snyder
patent: 3563557 (1971-02-01), Doutt
patent: 3747894 (1973-07-01), Pepper
patent: 3915428 (1975-10-01), Hastings
patent: 4177971 (1979-12-01), Landamore
patent: 4562994 (1986-01-01), McDonald
patent: 4609177 (1988-09-01), Turner
Dark Richard C. G.
Wright William L.
Robert Manufacturing Company
Walton George L.
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