Patent US4068761A successfully refreshed from Google Patents.
Patent US3124848A successfully refreshed from Google Patents.
US3124848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door closing control mechanism
Assignee: —
•
Filing: —
•
Granted: 1964-03-17
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Expires: 1981-03-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:45
CPC Classifications
E; E05; E05F; E05F3/00; E05F3/04; E05F3/10; E05F3/104
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
IN COMBINATION WITH A DOOR PIVOTALLY MOUNTED IN A DOOR FRAME, MEANS SECURED TO THE DOOR AND TO THE FRAME WHEREBY IT IS SPRING BIASED TOWARD CLOSED POSITION, A CHANNEL MEMBER HAVING SIDE AND END PORTIONS MOUNTED IN A HORIZONTAL ELEMENT OF THE DOOR FRAME, A LONGITUDINALLY MOVABLE CAM MOUNTED IN SAID CHANNEL AND HAVING THE CAM SURFACE THEREON EXTENDING DIAGONALLY THEREOF AT AN ANGLE OF 20-25 DEGREES, A HINGE PIN ROTATABLY MOUNTED IN THE CHANNEL MEMBER EXTENDING THROUGH THE CHANNEL MEMBER AND INTO THE DOOR AND FIXED AGAINST ROTATION IN THE DOOR, AN ARM ON THE HINGE PIN FIXED TO THE HINGE PIN AT ONE OF ITS ENDS AND EXTENDING OUTWARD THEREFROM WITH ITS FREE END IN ENGAGEMENT WITH THE CAM SURFACE ON THE LONGITUDINALLY MOVABLE CAM AND SO POSITIONED RELATIVE TO THE CAM SURFACE THAT A BRAKING FORCE IS EXERTED UPON THE BIASING MEANS FOR THE DOOR FOR THE MAJOR PORTION OF
Claim 2
Dependent Claim
154 words
IN COMBINATION WITH A DOOR PIVOTALLY MOUNTED IN A DOOR FRAME, MEANS SECURED TO THE DOOR AND TO THE FRAME WHEREBY IT IS SPRING BIASED TOWARD CLOSED POSITION, A CHANNEL MEMBER HAVING SIDE AND END PORTIONS MOUNTED IN A HORIZONTAL ELEMENT OF THE DOOR FRAME, A LONGITUDINALLY MOVABLE CAM MOUNTED IN SAID CHANNEL AND HAVING THE CAM SURFACE THEREON EXTENDING DIAGONALLY THEREOF AT AN ANGLE OF 20-25 DEGREES, A HINGE PIN ROTATABLY MOUNTED IN THE CHANNEL MEMBER EXTENDING THROUGH THE CHANNEL MEMBER AND INTO THE DOOR AND FIXED AGAINST ROTATION IN THE DOOR, AN ARM ON THE HINGE PIN FIXED TO THE HINGE PIN AT ONE OF ITS ENDS AND EXTENDING OUTWARD THEREFROM WITH ITS FREE END IN ENGAGEMENT WITH THE CAM SURFACE ON THE LONGITUDINALLY MOVABLE CAM AND SO POSITIONED RELATIVE TO THE CAM SURFACE THAT A BRAKING FORCE IS EXERTED UPON THE BIASING MEANS FOR THE DOOR FOR THE MAJOR PORTION OF
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) | 1967-03-17 | 1967-09-16 | 1968-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-17 | 1971-09-16 | 1972-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-17 | 1975-09-16 | 1976-03-17 | $7700.00 | Window Closed / Lapsed |