Patent US3136559A successfully refreshed from Google Patents.
US3136559A
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Piston ring spacer
Assignee: Muskegon Piston Ring Co
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Filing: 1961-01-25
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Granted: 1964-06-09
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Expires: 1981-01-25
Abstract
No abstract record available.
Inventors
- 👤 Douglas W Hamm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:29
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/12; F16J9/14; F16J9/145; F16J9/06; F16J9/064; F16J9/066
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A PISTON RING HAVING A SPACER AND A PAIR OF RAILS, SAID SPACER COMPRISING: A PLURALITY OF CROSS MEMBERS JOINED TOGETHER BY WEBS ARRANGED ALONG A LINE MIDWAY BETWEEN THE ENDS OF SAID CROSS MEMBERS; EACH OF SAID CROSS MEMBERS BEING FORMED INTO A TUBULAR MEMBER WITH OPPOSITE ENDS THEREOF BEING ADJACENT TO EACH OTHER AND DEFINING A GAP THEREBETWEEN OF A WIDTH LESS THAN THE THICKNESS OF ONE OF SAID RAILS; SAID TUBULAR MEMBER HAVING A FIRST PAIR OF OPPOSITELY DIRECTED FACES FORMING RAIL SEATS AND A SECOND PAIR OF OPPOSITELY DIRECTED FACES FORMING INNER AND OUTER BIGHT PORTIONS; SAID WEBS BEING ARRANGED ALONG SAID INNER BIGHT PORTION AND SAID ENDS OF SAID CROSS MEMBERS BEING ARRANGED ALONG SAID OUTER BIGHT PORTION; MEANS FOR ENGAGING THE INNER RADIAL EDGES OF SAID RAILS.
Claim 2
Dependent Claim
133 words
A PISTON RING HAVING A SPACER AND A PAIR OF RAILS, SAID SPACER COMPRISING: A PLURALITY OF CROSS MEMBERS JOINED TOGETHER BY WEBS ARRANGED ALONG A LINE MIDWAY BETWEEN THE ENDS OF SAID CROSS MEMBERS; EACH OF SAID CROSS MEMBERS BEING FORMED INTO A TUBULAR MEMBER WITH OPPOSITE ENDS THEREOF BEING ADJACENT TO EACH OTHER AND DEFINING A GAP THEREBETWEEN OF A WIDTH LESS THAN THE THICKNESS OF ONE OF SAID RAILS; SAID TUBULAR MEMBER HAVING A FIRST PAIR OF OPPOSITELY DIRECTED FACES FORMING RAIL SEATS AND A SECOND PAIR OF OPPOSITELY DIRECTED FACES FORMING INNER AND OUTER BIGHT PORTIONS; SAID WEBS BEING ARRANGED ALONG SAID INNER BIGHT PORTION AND SAID ENDS OF SAID CROSS MEMBERS BEING ARRANGED ALONG SAID OUTER BIGHT PORTION; MEANS FOR ENGAGING THE INNER RADIAL EDGES OF SAID RAILS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |