US3249961A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door closer
Assignee: Ideal Brass Works Inc
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Filing: 1964-01-30
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Granted: 1966-05-10
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Expires: 1984-01-30
Abstract
No abstract record available.
Inventors
- 👤 Bert A Quinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:26
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
146 words
IN A DOOR CLOSER MECHANISM OF THE TYPE WHICH INCLUDES AN ELONGATED CYLINDRICAL CASING, A PISTON FRICTIONALLY RECEIVED WITHIN SAID CASING FOR RECIPROCAL SLIDING MOVEMENTS, AN AXIALLY EXTENDED PISTON ROD THREADABLY CONNECTED AT ONE END TO SAID PISTON FOR AXIAL ADJUSTMENTS OF SAID PISTON THEREON UPON ROTARY MOVEMENTS BEING IMPARTED TO SAID CASING, THE OTHER END OF SAID PISTON ROD PROJECTING THROUGH AND HAVING SEALING ENGAGEMENT WITH ONE END OF SAID CASING AND HAVING BRACKET MEANS THEREON FOR ANCHORING THE SAME TO A DOOR FRAME IN A MANNER PREVENTING ROTATION THEREOF ABOUT ITS OWN AXIS BUT PERMITTING LIMITED SWINGING MOVEMENTS THEREOF ABOUT AN AXIS PARALLEL TO THE AXIS OF SWINGING MOVEMENS OF A DOOR MOUNTED IN SAID DOOR FRAME, MEANS YIELDING BIASING SAID PISTON TOWARD THE OTHER END OF SAID CASING, MEANS DEFINED BY SAID PISTON AND PISTON ROD RESTRICTING THE FLOW OF FLUID BY SAID
Claim 2
Dependent Claim
146 words
IN A DOOR CLOSER MECHANISM OF THE TYPE WHICH INCLUDES AN ELONGATED CYLINDRICAL CASING, A PISTON FRICTIONALLY RECEIVED WITHIN SAID CASING FOR RECIPROCAL SLIDING MOVEMENTS, AN AXIALLY EXTENDED PISTON ROD THREADABLY CONNECTED AT ONE END TO SAID PISTON FOR AXIAL ADJUSTMENTS OF SAID PISTON THEREON UPON ROTARY MOVEMENTS BEING IMPARTED TO SAID CASING, THE OTHER END OF SAID PISTON ROD PROJECTING THROUGH AND HAVING SEALING ENGAGEMENT WITH ONE END OF SAID CASING AND HAVING BRACKET MEANS THEREON FOR ANCHORING THE SAME TO A DOOR FRAME IN A MANNER PREVENTING ROTATION THEREOF ABOUT ITS OWN AXIS BUT PERMITTING LIMITED SWINGING MOVEMENTS THEREOF ABOUT AN AXIS PARALLEL TO THE AXIS OF SWINGING MOVEMENS OF A DOOR MOUNTED IN SAID DOOR FRAME, MEANS YIELDING BIASING SAID PISTON TOWARD THE OTHER END OF SAID CASING, MEANS DEFINED BY SAID PISTON AND PISTON ROD RESTRICTING THE FLOW OF FLUID BY SAID
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) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |