US3231048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elevator door control systems
Assignee: Turnbull Elevator Ltd
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Filing: 1963-09-18
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Granted: 1966-01-25
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Expires: 1983-09-18
Abstract
No abstract record available.
Inventors
- 👤 Mitchell Omery Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:54
CPC Classifications
B; B66; B66B; B66B13/00; B66B13/24; B66B13/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN AN ELEVATOR SYSTEM INCLUDING AN ELEVATOR CAR, A CAR DOOR REVERSIBLY MOVABLE BETWEEN OPEN AND CLOSED POSITIONS, REVERSIBLE POWER MEANS TO MOVE SAID DOOR BETWEEN SAID POSITIONS, AND A HALL DOOR REVERSIBLY MOVABLE BETWEEN OPEN AND CLOSED POSITIONS; THE PROVISION OF INTERENGAGING DRIVING ELEMENTS ON THE CAR DOOR AND THE HALL DOOR TO MOVE THE HALL DOOR GENERALLY IN SYNCHRONISM WITH THE CAR DOOR; RESILIENT MOUNTING MEANS FOR ONE OF SAID ELEMENTS ON ITS ASSOCIATED DOOR TO BIAS THE DOORS TO A NORMAL RELATIVE POSITION AND, UPON OBSTRUCTION OF THE HALL DOOR DURING CLOSING, TO ALLOW FURTHER
Claim 2
Dependent Claim
98 words
IN AN ELEVATOR SYSTEM INCLUDING AN ELEVATOR CAR, A CAR DOOR REVERSIBLY MOVABLE BETWEEN OPEN AND CLOSED POSITIONS, REVERSIBLE POWER MEANS TO MOVE SAID DOOR BETWEEN SAID POSITIONS, AND A HALL DOOR REVERSIBLY MOVABLE BETWEEN OPEN AND CLOSED POSITIONS; THE PROVISION OF INTERENGAGING DRIVING ELEMENTS ON THE CAR DOOR AND THE HALL DOOR TO MOVE THE HALL DOOR GENERALLY IN SYNCHRONISM WITH THE CAR DOOR; RESILIENT MOUNTING MEANS FOR ONE OF SAID ELEMENTS ON ITS ASSOCIATED DOOR TO BIAS THE DOORS TO A NORMAL RELATIVE POSITION AND, UPON OBSTRUCTION OF THE HALL DOOR DURING CLOSING, TO ALLOW FURTHER
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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |