US3144256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free piston seal
Assignee: Individual
•
Filing: 1962-08-06
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Granted: 1964-08-11
•
Expires: 1982-08-06
Abstract
No abstract record available.
Inventors
- 👤 Clarence E Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:18
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3204; F16J15/3232
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A FREE PISTON SEAL COMPRISING A SERIES OF SPACED ANNULAR LIPS HAVING PERIPHERAL ESSENTIALLY SHARP POINTED EDGES AND DEFINING SPACED ANNULAR GROOVES THEREBETWEEN, ONE OF SAID LIPS BEING AN OIL CONTROL LIP HAVING OPPOSITELY INCLINED SURFACES WHICH INTERSECT TO DEFINE THE PERIPHERAL EDGE, SAID OIL CONTROL LIP ADAPTED TO METER LUBRICATING FLUID FROM BEHIND THE PISTON TO SAID ANNULAR GROOVES DURING THE INTAKE STROKE OF THE PISTON, AND A PLURALITY OF SEAL LIPS SPACED OUTWARDLY FROM SAID OIL CONTROL LIP, EACH OF SAID SEAL LIPS HAVING UPPER AND BOTTOM SURFACES WHICH INTERSECT AT THE PERIPHERAL EDGES, SAID SURFACES BEING ANGLED SO AS TO PASS MINUTE QUANTITIES OF LUBRICATING FLUID BY THE OUTER PERIPHERAL EDGES OF SAID LIPS DURING THE INTAKE STROKE OF THE PISTON AND TO PRECLUDE THE PASSING OF THE PUMPED FLUID DURING THE EXHAUST STROKE OF THE PISTON, THE SEAL LIP NEAREST TO THE PUMPED FLUID HAVING A GREATER DIAMETER THAN THE OTHER SEAL LIPS.
Claim 2
Dependent Claim
157 words
A FREE PISTON SEAL COMPRISING A SERIES OF SPACED ANNULAR LIPS HAVING PERIPHERAL ESSENTIALLY SHARP POINTED EDGES AND DEFINING SPACED ANNULAR GROOVES THEREBETWEEN, ONE OF SAID LIPS BEING AN OIL CONTROL LIP HAVING OPPOSITELY INCLINED SURFACES WHICH INTERSECT TO DEFINE THE PERIPHERAL EDGE, SAID OIL CONTROL LIP ADAPTED TO METER LUBRICATING FLUID FROM BEHIND THE PISTON TO SAID ANNULAR GROOVES DURING THE INTAKE STROKE OF THE PISTON, AND A PLURALITY OF SEAL LIPS SPACED OUTWARDLY FROM SAID OIL CONTROL LIP, EACH OF SAID SEAL LIPS HAVING UPPER AND BOTTOM SURFACES WHICH INTERSECT AT THE PERIPHERAL EDGES, SAID SURFACES BEING ANGLED SO AS TO PASS MINUTE QUANTITIES OF LUBRICATING FLUID BY THE OUTER PERIPHERAL EDGES OF SAID LIPS DURING THE INTAKE STROKE OF THE PISTON AND TO PRECLUDE THE PASSING OF THE PUMPED FLUID DURING THE EXHAUST STROKE OF THE PISTON, THE SEAL LIP NEAREST TO THE PUMPED FLUID HAVING A GREATER DIAMETER THAN THE OTHER SEAL LIPS.
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) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |