Valves and valve actuation – Rotary valves – Plug
Patent
1976-04-29
1977-10-25
Cline, William R.
Valves and valve actuation
Rotary valves
Plug
251317F, F16K 500
Patent
active
040553248
ABSTRACT:
A novel plug valve assembly is described having improved leak-resistance under high pressures. It includes a housing with inlet and outlet ports and a cylindrical valve chamber. Cylindrical valve sealing members are slidably mounted in the ports, each sealing member having a main body portion with a concave end face portion adjacent the valve chamber and an axial bore extending therethrough. The main body portion has an annular recess on the cylindrical surface thereof extending from the concave end to an annular abutment intermediate the length of the main body portion. A generally tubular resilient collar is slidably mounted on the recessed portion of the main body, this collar having a thickness substantially equal to the depth of the recess and having a concave end portion protruding beyond the concave end of the main body portion. A cylindrical valve member having a transverse port therethrough is positioned within the chamber in resiliently sealing engagement with the concave end portions of the sealing member resilient collars, and resiliently supported for rotation by a lower valve seat and an upper valve seat and sealing means, e.g. "O" ring means mounted in annular grooves formed at the top and bottom edges of said valve member, such that the "O" ring means engage both a cylindrical side wall and an end wall of the chamber and an end wall of the valve member.
REFERENCES:
patent: 3111299 (1963-11-01), Miller et al.
patent: 3185179 (1965-05-01), Harautuneian
patent: 3266769 (1966-08-01), Shand
patent: 3295554 (1967-01-01), Huppert
patent: 3353785 (1967-11-01), Eggers
patent: 3484078 (1969-12-01), Haenky
patent: 3504885 (1970-04-01), Hulsey
patent: 3848849 (1974-11-01), Alexander
Dalkin Stanislaw
Hughes John F.
Cline William R.
Spiegel H. Jay
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