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Albert Earl Alpine received US Patent No. 3,575,430 on April 20, 1971, filed January 10, 1969.
The patent's abstract:
Equipment for use in connecting sections of pipe comprising spigot and socket parts, the socket part having an annular channel for receiving the main body of a packing ring, the spigot part having a shoulder presented inwardly of the joint, and the packet ring having a flange projecting inwardly of the joint from the channel in the socket part and having an enlargement at its free edge adapted to cooperate with the shoulder on the spigot part to limit assembly movement of the socket and spigot parts.
- Author
- Albert Earl Alpine
- Published by
- US Patent Office
- Series
- US Patent No. 3,575,430
- Date
- April 20, 1971
- Library no.
- ACL Doc 23351 · asbestosclaims.law/library/23351
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 5 pages · 416 KB
Where it was listed
- Asbestos, May 1972, in its patents department (the year's issues)
Cite this document
Albert Earl Alpine. “Pipe joint packing ring having means limiting assembly movement (US Patent 3,575,430, 1971).” April 20, 1971. US Patent No. 3,575,430. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23351. https://asbestosclaims.law/library/23351.
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