Patent JPS6137341A successfully refreshed from Google Patents.
US3129453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic door closer
Assignee: MARLBORO Manufacturing Inc
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Filing: 1961-05-01
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Granted: 1964-04-21
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Expires: 1981-05-01
Abstract
No abstract record available.
Inventors
- 👤 Walter S Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:10
CPC Classifications
E; E05; E05F; E05F3/00; E05F3/04; E05F3/10; E05F3/108; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A HYDRAULIC DOOR CLOSER COMPRISING A CYLINDRICAL BODY MEMBER HAVING APERTURED FITTINGS CLOSING ITS OPPOSITE ENDS, A PISTON ROD POSITIONED THROUGH ONE OF SAID APERTURED FITTINGS AND HAVING A PISTON ON ITS INNER END, A COIL SPRING POSITIONED BETWEEN SAID APERTURED FITTING AND SAID PISTON INWARDLY OF SAID CYLINDER, SAID PISTON ROD HAVING A BORE IN ITS INNER END AND A SOLID ADJUSTMENT VALVE THREADABLY POSITIONED IN SAID BORE AND ARRANGED TO CONTROL AN ORIFICE COMMUNICATING WITH SAID BORE AT A POINT OUTWARDLY OF SAID SOLID ADJUSTMENT VALVE THEREIN AND WITH THE PISTON ROD CONTAINING PORTION OF SAID CYLINDER, A PORTION OF SMALLER DIAMETER OF SAID SOLID ADJUSTMENT VALVE EXTENDING AXIALLY OF AND BEYOND SAID BORE IN SPACED RELATION THERETO AND BEYOND SAID PISTON, A PLUNGER MOVABLY POSITIONED IN THE OTHER OF SAID APERTURED FITTINGS, SAID PLUNGER HAVING A TRANSVERSE SLOT IN ITS INNER END ARRANGED TO BE MOVED INTO ENGAGEMENT WITH SAID EXTENDING PORTION OF SAID SOLID ADJUSTMENT VALVE TO ROTATE THE SAME.
Claim 2
Dependent Claim
164 words
A HYDRAULIC DOOR CLOSER COMPRISING A CYLINDRICAL BODY MEMBER HAVING APERTURED FITTINGS CLOSING ITS OPPOSITE ENDS, A PISTON ROD POSITIONED THROUGH ONE OF SAID APERTURED FITTINGS AND HAVING A PISTON ON ITS INNER END, A COIL SPRING POSITIONED BETWEEN SAID APERTURED FITTING AND SAID PISTON INWARDLY OF SAID CYLINDER, SAID PISTON ROD HAVING A BORE IN ITS INNER END AND A SOLID ADJUSTMENT VALVE THREADABLY POSITIONED IN SAID BORE AND ARRANGED TO CONTROL AN ORIFICE COMMUNICATING WITH SAID BORE AT A POINT OUTWARDLY OF SAID SOLID ADJUSTMENT VALVE THEREIN AND WITH THE PISTON ROD CONTAINING PORTION OF SAID CYLINDER, A PORTION OF SMALLER DIAMETER OF SAID SOLID ADJUSTMENT VALVE EXTENDING AXIALLY OF AND BEYOND SAID BORE IN SPACED RELATION THERETO AND BEYOND SAID PISTON, A PLUNGER MOVABLY POSITIONED IN THE OTHER OF SAID APERTURED FITTINGS, SAID PLUNGER HAVING A TRANSVERSE SLOT IN ITS INNER END ARRANGED TO BE MOVED INTO ENGAGEMENT WITH SAID EXTENDING PORTION OF SAID SOLID ADJUSTMENT VALVE TO ROTATE THE SAME.
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) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |