Patent US3146825A successfully refreshed from Google Patents.
US3146825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Counterbalance mechanism
Assignee: Berry Industries Inc
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Filing: 1962-06-14
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Granted: 1964-09-01
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Expires: 1982-06-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles T Briggs
- 👤 John J Kempel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:36
CPC Classifications
E; E05; E05D; E05D13/00; E05D13/10; E05D13/12; E05D13/1207; E05D13/1215; E05F; E05F11/00; E05F11/38; E05F11/48; E05D15/00; E05D15/16; E05D15/24; E05Y; E05Y2201/00; E05Y2201/60; E05Y2201/622; E05Y2201/658; E05Y2201/668; E05Y2201/67; E05Y2900/00; E05Y2900/10; E05Y2900/106
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
A COUNTERBALANCING MECHANISM FOR USE IN BALANCING THE WEIGHT OF AN OVERHEAD DOOR SUPPORTED FOR VERTICAL MOVEMENT TO OPEN AND CLOSE A DOORWAY IN A STRUCTURE, SAID COUNTERBALANCING MECHANISM COMPRISING A RIGID SHAFT, MOUNTING MEANS CONNECTED TO THE SHAFT FOR FIXABLY SUPPORTING SAID SHAFT ON SAID STRUCTURE, A TENSION COIL SPRING ENCIRCLING SAID SHAFT BETWEEN SAID MOUNTING MEANS AND HAVING ONE END THEREOF FIXED TO SAID SHAFT AND THE OTHER END THEREOF MOVABLE ALONG SAID SHAFT IN THE NORMAL OPERATING CONDITION OF SAID MECHANISM, MEANS CONNECTED TO SAID MOVABLE END OF SAID SPRING ADAPTED FOR OPERABLY CONNECTING SAID SPRING TO THE DOOR SUCH THAT CLOSING AND OPENING MOVEMENT OF THE DOOR RESPECTIVELY CAUSES SAID SPRING TO AXIALLY EXTEND AND CONTRACT ALONG SAID SHAFT TO THEREBY COUNTERBALANCE THE DOOR, AND MEANS DETACHABLY CONNECTING THE MOVABLE END OF SAID SPRING TO SAID SHAFT AT A PREDETERMINED POINT THEREALONG SUCH THAT SAID SPRING IS AXIALLY EXTENDED TO THEREBY PRESTRESS SAID SPRING TO FACILITATE CONNECTION THEREOF WITH THE DOOR, SAID MEANS CONNECTED TO SAID MOVABLE END OF SAID SPRING COMPRISING A PAIR OF GENERALLY U-SHAPED STRAPS DISPOSED ON OP-
Claim 2
Dependent Claim
185 words
A COUNTERBALANCING MECHANISM FOR USE IN BALANCING THE WEIGHT OF AN OVERHEAD DOOR SUPPORTED FOR VERTICAL MOVEMENT TO OPEN AND CLOSE A DOORWAY IN A STRUCTURE, SAID COUNTERBALANCING MECHANISM COMPRISING A RIGID SHAFT, MOUNTING MEANS CONNECTED TO THE SHAFT FOR FIXABLY SUPPORTING SAID SHAFT ON SAID STRUCTURE, A TENSION COIL SPRING ENCIRCLING SAID SHAFT BETWEEN SAID MOUNTING MEANS AND HAVING ONE END THEREOF FIXED TO SAID SHAFT AND THE OTHER END THEREOF MOVABLE ALONG SAID SHAFT IN THE NORMAL OPERATING CONDITION OF SAID MECHANISM, MEANS CONNECTED TO SAID MOVABLE END OF SAID SPRING ADAPTED FOR OPERABLY CONNECTING SAID SPRING TO THE DOOR SUCH THAT CLOSING AND OPENING MOVEMENT OF THE DOOR RESPECTIVELY CAUSES SAID SPRING TO AXIALLY EXTEND AND CONTRACT ALONG SAID SHAFT TO THEREBY COUNTERBALANCE THE DOOR, AND MEANS DETACHABLY CONNECTING THE MOVABLE END OF SAID SPRING TO SAID SHAFT AT A PREDETERMINED POINT THEREALONG SUCH THAT SAID SPRING IS AXIALLY EXTENDED TO THEREBY PRESTRESS SAID SPRING TO FACILITATE CONNECTION THEREOF WITH THE DOOR, SAID MEANS CONNECTED TO SAID MOVABLE END OF SAID SPRING COMPRISING A PAIR OF GENERALLY U-SHAPED STRAPS DISPOSED ON OP-
References Cited (Backward Citations)
US748641A
Cited
US2041221A
Cited
US2139383A
Cited
US2259979A
Cited
US2311703A
Cited
US2702082A
Cited
US2894572A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |