Patent US5381832A successfully refreshed from Google Patents.
Patent US3177782A successfully refreshed from Google Patents.
US3177782A
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Piston and rod assembly
Assignee: SP Manufacturing CORP
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Filing: 1962-04-18
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Granted: 1965-04-13
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Expires: 1982-04-18
Abstract
No abstract record available.
Inventors
- 👤 Merritt B Sampson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:33
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/10; F16J1/12; F16B; F16B2200/00; F16B2200/60; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/929; Y10T; Y10T403/00; Y10T403/70; Y10T403/7047
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
IN A FLUID CYLINDER ADAPTED FOR REPETITIVE, HIGH SPEED, RECIPROCAL CYCLING, AND HAVING A HOUSING DEFINING A CYLINDRICAL CHAMBER AND INLET AND OUTLET PORTS COMMUNICATING WITH THE CHAMBER, SAID HOUSING INCLUDING A ROD APERTURE COMMUNICATION WITH THE CHAMBER, THE COMBINATION OF: (A) PISTON ROD DISPOSED IN THE APERTURE WITH ONE END DISPOSED WITHIN THE CHAMBER, SAID PISTON ROD BEING EXTERNALLY THREADED NEAR SAID ONE END; (B) A RESILIENT, CONVOLUTED, WIRE COIL WOUND ON THE THREAD OF SAID ROD OVER A LENGTH OF THE THREAD SUBSTANTIALLY EQUAL TO THE DIAMETER OF THE ROD THREADS, THE OUTER SURFACE OF THE CONVOLUTIONS OF SAID COIL DEFINING A THREAD, THE INNER SURFACE OF THE CONVOLUTIONS OF THE COIL BEING DISPOSED IN THE GROOVE OF THE THREAD ON SAID ROD;
Claim 2
Dependent Claim
125 words
IN A FLUID CYLINDER ADAPTED FOR REPETITIVE, HIGH SPEED, RECIPROCAL CYCLING, AND HAVING A HOUSING DEFINING A CYLINDRICAL CHAMBER AND INLET AND OUTLET PORTS COMMUNICATING WITH THE CHAMBER, SAID HOUSING INCLUDING A ROD APERTURE COMMUNICATION WITH THE CHAMBER, THE COMBINATION OF: (A) PISTON ROD DISPOSED IN THE APERTURE WITH ONE END DISPOSED WITHIN THE CHAMBER, SAID PISTON ROD BEING EXTERNALLY THREADED NEAR SAID ONE END; (B) A RESILIENT, CONVOLUTED, WIRE COIL WOUND ON THE THREAD OF SAID ROD OVER A LENGTH OF THE THREAD SUBSTANTIALLY EQUAL TO THE DIAMETER OF THE ROD THREADS, THE OUTER SURFACE OF THE CONVOLUTIONS OF SAID COIL DEFINING A THREAD, THE INNER SURFACE OF THE CONVOLUTIONS OF THE COIL BEING DISPOSED IN THE GROOVE OF THE THREAD ON SAID ROD;
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |