Patent US3129936A successfully refreshed from Google Patents.
US3129936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic door operator
Assignee: Individual
•
Filing: 1960-12-23
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Granted: 1964-04-21
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Expires: 1980-12-23
Abstract
No abstract record available.
Inventors
- 👤 Carlson Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:59
CPC Classifications
E; E05; E05F; E05F3/00; E05F3/22; E05F3/223; E05F15/00; E05F15/50; E05F15/53; E05F15/60; E05F15/603; E05F15/611; E05F15/614; E05F3/04; E05F3/10; E05F3/106; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A DOOR OPERATING MECHANISM COMPRISING A ROTATABLE SPINDLE ADAPTED TO SUPPORT A DOOR FOR SWINGING MOVEMENT AND TO HAVE A DRIVING CONNECTION THEREWITH, A NORMALLY TENSIONED SPRING IN DRIVING RELATION WITH SAID SPINDLE AND ADAPTED TO RELEASE ITS STORED ENERGY TO TURN SAID SPINDLE IN A DOOR OPENING DIRECTION, MOTOR MEANS FOR TURNING SAID SPINDLE IN A DOOR CLOSING DIRECTION AND LOADING SAID SPRING FOR A SUBSEQUENT DOOR OPENING OPERATION, LATCH MEANS FOR HOLDING SAID SPINDLE IN DOOR CLOSED POSITION AGAINST THE TENSION OF SAID SPRING, AND CIRCUIT MEANS FOR CONTROLLING
Claim 2
Dependent Claim
91 words
A DOOR OPERATING MECHANISM COMPRISING A ROTATABLE SPINDLE ADAPTED TO SUPPORT A DOOR FOR SWINGING MOVEMENT AND TO HAVE A DRIVING CONNECTION THEREWITH, A NORMALLY TENSIONED SPRING IN DRIVING RELATION WITH SAID SPINDLE AND ADAPTED TO RELEASE ITS STORED ENERGY TO TURN SAID SPINDLE IN A DOOR OPENING DIRECTION, MOTOR MEANS FOR TURNING SAID SPINDLE IN A DOOR CLOSING DIRECTION AND LOADING SAID SPRING FOR A SUBSEQUENT DOOR OPENING OPERATION, LATCH MEANS FOR HOLDING SAID SPINDLE IN DOOR CLOSED POSITION AGAINST THE TENSION OF SAID SPRING, AND CIRCUIT MEANS FOR CONTROLLING
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 |