Valves and valve actuation – Plural motions of actuator
Patent
1976-04-29
1977-06-28
Cline, William R.
Valves and valve actuation
Plural motions of actuator
251188, 251161, 251164, 251312, 13762523, 251288, F16K 3100
Patent
active
040321070
ABSTRACT:
An improved plug valve has means for operating a stem and plug assembly therein, including a sleeve secured within an opening in a valve cover plate, and a tubular gland which is threadably engaged in the sleeve and which coacts with upper and lower stop means incorporated into the stem to raise and lower the plug. Annular sealing rings are employed between the valve stem and the gland and between the gland and the sleeve to prevent leakage, especially when the plug is in a raised position. The upper end of the gland is shaped to receive means for turning the gland to thereby raise or lower the valve stem and plug assembly. A lock nut is rotatable about the gland and selectively against the upper end of the sleeve, whereby the gland may be tightly secured in the sleeve to thereby hold the plug in a sealing position within the valve bore.
REFERENCES:
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patent: 3521673 (1970-07-01), Gruner et al.
patent: 3948284 (1976-04-01), Walworth
Cline William R.
McNaughton Thomas
Spiegel H. Jay
The Hilliard Corporation
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