Title: Annular seals

Abstract: A method of sealing an annular gap and a sealing arrangement suitable for plug valves, shafts and pistons. An annular sealing member is toroidally rotated through a substantial angle prior to or during insertion in the gap to be sealed, and is arranged so as to be free to react toroidally against the sealing surfaces bounding the gap for positive sealing engagement therewith. In this way the sealing member forms a resilient seal for the gap without being subject to significant radial stresses. An important application of the invention is to seat seals for ball plug valves.

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Inventors: Melville, John G. E. (Shoreham-by-Sea, GB)

Application Number: 821061
Filing Date: 1977-08-01
Publication_date: 1979-01-16
Assignee: Worcester Controls (U.K.) Limited (Sussex, GB2)
Primary Class(es): 277/403 251/172, 251/315.05, 251/315.14
Other Classes:
US Patent Ref:

2297161	Sep, 1942	Newton	251/315.
3002525	Oct, 1961	Grove	251/174.
3006599	Oct, 1961	Eckert	251/174.
3269693	Aug, 1966	Gulick	251/315.
3331581	Jul, 1967	O'Connor	251/174.
3497176	Feb, 1970	Priese	251/172.
3556471	Jan, 1971	Paul	251/172.
3587155	Jun, 1971	Packard	277/216.

Other Refs: 23551981004971

Jul, 1975	DE
Sep, 1965	GB

Primary Examiner: Ward, Jr., Robert S.
Assistant Examiner:
Attorney: Pollock, Vande Sande & Priddy