US3149543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-lubricated piston
Assignee: Ingersoll Rand Co
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Filing: 1963-03-04
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Granted: 1964-09-22
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Expires: 1983-03-04
Abstract
No abstract record available.
Inventors
- 👤 Naab Julius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:12
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/28; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/944; Y10S277/945; Y10S277/946; Y10S92/00; Y10S92/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A NON-LUBRICATED PISTON DISPOSED FOR RECIPROCATION IN A CYLINDER BORE COMPRISING, (A) A PISTON BODY HAVING AN OUTSIDE DIAMETER LESS THAN THAT OF THE CYLINDER BORE SO THAT THE PERIPHERAL SURFACE OF SAID PISTON BODY IS SPACED FROM THE SURFACE OF THE CYLINDER BORE, (B) AN ANNULAR RECESS IN THE PERIPHERAL SURFACE OF THE PISTON BODY EXTENDING SLIGHTLY LESS THAN THE FULL WIDTH OF THE PISTON BODY, (C) A SLEEVE MEANS COMPOSED OF NON-METALLIC MATERIAL DISPOSED IN SAID RECESS AND DIMENSIONED SO AS TO PROJECT BEYOND THE PERIPHERAL SURFACE OF SAID PISTON BODY, AND (D) AT LEAST ONE SEAL RING COMPOSED OF NON-METALLIC MATERIAL HAVING A HIGH RESISTANCE TO WEAR AND SELFLUBRICATING CHARACTERISTICS CARRIED BY SAID SLEEVE AND BIASED OUTWARDLY SO THAT ITS OUTER PERIPHERAL SURFACE PROJECTS BEYOND THE PERIPHERAL SURFACE OF SAID SLEEVE
Claim 2
Dependent Claim
134 words
A NON-LUBRICATED PISTON DISPOSED FOR RECIPROCATION IN A CYLINDER BORE COMPRISING, (A) A PISTON BODY HAVING AN OUTSIDE DIAMETER LESS THAN THAT OF THE CYLINDER BORE SO THAT THE PERIPHERAL SURFACE OF SAID PISTON BODY IS SPACED FROM THE SURFACE OF THE CYLINDER BORE, (B) AN ANNULAR RECESS IN THE PERIPHERAL SURFACE OF THE PISTON BODY EXTENDING SLIGHTLY LESS THAN THE FULL WIDTH OF THE PISTON BODY, (C) A SLEEVE MEANS COMPOSED OF NON-METALLIC MATERIAL DISPOSED IN SAID RECESS AND DIMENSIONED SO AS TO PROJECT BEYOND THE PERIPHERAL SURFACE OF SAID PISTON BODY, AND (D) AT LEAST ONE SEAL RING COMPOSED OF NON-METALLIC MATERIAL HAVING A HIGH RESISTANCE TO WEAR AND SELFLUBRICATING CHARACTERISTICS CARRIED BY SAID SLEEVE AND BIASED OUTWARDLY SO THAT ITS OUTER PERIPHERAL SURFACE PROJECTS BEYOND THE PERIPHERAL SURFACE OF SAID SLEEVE
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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |