Patent US3191946A successfully refreshed from Google Patents.
US3191946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston rings
Assignee: Muskegon Piston Ring Co
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Filing: 1962-07-25
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Granted: 1965-06-29
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Expires: 1982-07-25
Abstract
No abstract record available.
Inventors
- 👤 Douglas W Hamm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:59
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/06; F16J9/064; F16J9/065; F16J9/061; F16J9/063; F16J9/066; F16J9/069
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
228 words
A PISTON RING HAVING A CYLINDER WALL CONTACTING MEMBER WITH AN OPEN PART AND AN EXPANDER WITH A CLOSED PART, SAID EXPANDER BEING RADIALLY INWARD OF SAID MEMBER; SAID MEMBER HAVING RECESSES IN THE RADIALLY INNER PORTION OF BOTH ITS UPPER AND LOWER SIDES; THE RADIALLY OUTER ENDS OF SAID RECESSES BEING DEFINED BY RADIALLY INWARDLY FACING WALLS; SAID EXPANDER CIRCUMFERENTIALLY BEING A ZIG-ZAG SPRING AND BEING U-SHAPED IN CROSS SECTION AND HAVING A PAIR OF RADIALLY OUTWARDLY EXTENDING LEGS AXIALLY SPACED BY A PLURALITY OF STRUTS; SAID LEGS TELESCOPING ABOUT THE RADIALLY INNER PORTION OF SAID MEMBER AND RECEIVED IN SAID RECESSES; UPON CLOSING OF SAID PARTS IN SAID MEMBER AND SAID RAILS, SAID EXPANDER BEING COMPRESSED CIRCUMFERENTIALLY AND EXERTING RADIAL PRESSURE ON SAID MEMBER; THE INNER FACE OF SAID MEMBER BEING RADIALLY SPACED FROM SAID STRUTS; THE RADIALLY OUTER FACE OF SAID MEMBER BEING UPWARDLY AND INWARDLY INCLINED SO THAT THE LOWER MARGINAL CORNER OF SAID MEMBER HAS THE GREATEST DIMENSION THEREOF; THE RADIAL DISTANCE BETWEEN THE LOWER ONE OF SAID WALLS AND RADIALLY INNER PORTION OF SAID EXPANDER IS GREATER THAN THE RADIAL DISTANCE BETWEEN THE UPPER ONE OF SAID WALLS AND THE RADIALLY INNER PORTION OF SAID EXPANDER FOR TILTING SAID MEMBER INTO AN UPWARDLY AND INWARDLY INCLINED ATTITUDE ABOUT SAID LOWER MARGINAL CORNER THEREOF WHEN SAID PISTON RING IS CONFINED IN A CYLINDER.
Claim 2
Dependent Claim
228 words
A PISTON RING HAVING A CYLINDER WALL CONTACTING MEMBER WITH AN OPEN PART AND AN EXPANDER WITH A CLOSED PART, SAID EXPANDER BEING RADIALLY INWARD OF SAID MEMBER; SAID MEMBER HAVING RECESSES IN THE RADIALLY INNER PORTION OF BOTH ITS UPPER AND LOWER SIDES; THE RADIALLY OUTER ENDS OF SAID RECESSES BEING DEFINED BY RADIALLY INWARDLY FACING WALLS; SAID EXPANDER CIRCUMFERENTIALLY BEING A ZIG-ZAG SPRING AND BEING U-SHAPED IN CROSS SECTION AND HAVING A PAIR OF RADIALLY OUTWARDLY EXTENDING LEGS AXIALLY SPACED BY A PLURALITY OF STRUTS; SAID LEGS TELESCOPING ABOUT THE RADIALLY INNER PORTION OF SAID MEMBER AND RECEIVED IN SAID RECESSES; UPON CLOSING OF SAID PARTS IN SAID MEMBER AND SAID RAILS, SAID EXPANDER BEING COMPRESSED CIRCUMFERENTIALLY AND EXERTING RADIAL PRESSURE ON SAID MEMBER; THE INNER FACE OF SAID MEMBER BEING RADIALLY SPACED FROM SAID STRUTS; THE RADIALLY OUTER FACE OF SAID MEMBER BEING UPWARDLY AND INWARDLY INCLINED SO THAT THE LOWER MARGINAL CORNER OF SAID MEMBER HAS THE GREATEST DIMENSION THEREOF; THE RADIAL DISTANCE BETWEEN THE LOWER ONE OF SAID WALLS AND RADIALLY INNER PORTION OF SAID EXPANDER IS GREATER THAN THE RADIAL DISTANCE BETWEEN THE UPPER ONE OF SAID WALLS AND THE RADIALLY INNER PORTION OF SAID EXPANDER FOR TILTING SAID MEMBER INTO AN UPWARDLY AND INWARDLY INCLINED ATTITUDE ABOUT SAID LOWER MARGINAL CORNER THEREOF WHEN SAID PISTON RING IS CONFINED IN A CYLINDER.
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) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |