US3166331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston ring spacer-expander with overlap indication means
Assignee: SPX Technologies Inc
•
Filing: 1962-06-25
•
Granted: 1965-01-19
•
Expires: 1982-06-25
Abstract
No abstract record available.
Inventors
- 👤 Frank G Warrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:06
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/12; F16J9/14; F16J9/145; F16J9/06; F16J9/064; F16J9/066; F16J9/067
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A SPACER-EXPANDER FOR SUPPORTING, SPACING AND OUTWARDLY URGING GENERALLY FLAT, PARTED RAILS IN A PISTON OIL RING COMPRISING A PARTED RING OF THE SELF-SUPPORTING TYPE, SAID PARTED RING HAVING ENDS THAT ABUT WHEN SAID SPACEREXPANDER AND SAID RAILS ARE DISPOSED IN AN OIL RING GROOVE AND SAID SPACER-EXPANDER IS IN ITS OPERATIVE CIRCUMFERENTIALLY-COMPRESSED CONDITION, EACH OF SAID ENDS BEING PROVIDED WITH A RETURN BENT PORTION, EACH RETURN BENT PORTION FORMING AN ACUTE INCLUDED ANGLE WITH THE CONTIGUOUS PORTION OF SAID PARTED RING.
Claim 2
Dependent Claim
82 words
A SPACER-EXPANDER FOR SUPPORTING, SPACING AND OUTWARDLY URGING GENERALLY FLAT, PARTED RAILS IN A PISTON OIL RING COMPRISING A PARTED RING OF THE SELF-SUPPORTING TYPE, SAID PARTED RING HAVING ENDS THAT ABUT WHEN SAID SPACEREXPANDER AND SAID RAILS ARE DISPOSED IN AN OIL RING GROOVE AND SAID SPACER-EXPANDER IS IN ITS OPERATIVE CIRCUMFERENTIALLY-COMPRESSED CONDITION, EACH OF SAID ENDS BEING PROVIDED WITH A RETURN BENT PORTION, EACH RETURN BENT PORTION FORMING AN ACUTE INCLUDED ANGLE WITH THE CONTIGUOUS PORTION OF SAID PARTED RING.
References Cited (Backward Citations)
US326046A
Cited
US2059179A
Cited
US2112425A
Cited
US2466252A
Cited
US2789872A
Cited
US2917353A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-01-19 | 1968-07-20 | 1969-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-19 | 1972-07-20 | 1973-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-19 | 1976-07-20 | 1977-01-19 | $7700.00 | Window Closed / Lapsed |