US3308912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Revolving door operating mechanism and speed controller
Assignee: International Steel Co
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Filing: 1966-01-26
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Granted: 1967-03-14
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Expires: 1986-01-26
Abstract
No abstract record available.
Inventors
- 👤 Sheckells Amuel Edmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:36
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/90; E05; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A REVOLVING DOOR OPERATING MECHANISM AND SPEED CONTROL DEVICE OF THE CHARACTER DESCRIBED COMPRISING, A HOUSING, A MAIN GEAR ROTATABLY MOUNTED WITHIN SAID HOUSING, SAID MAIN GEAR BEING ADAPTED TO BE SECURED TO THE REVOLVING DOOR SHAFT, CENTRIFUGAL BRAKE MEANS POSITIONED WITHIN THE HOUSING, GEAR TRAIN MEANS ROTATABLY MOUNTED WITHIN THE HOUSING, SAID GEAR TRAIN MEANS BEING OPERATIVELY CONNECTED BETWEEN THE MAIN GEAR AND THE CENTRIFUGAL BRAKE MEANS, A CLUTCH ASSEMBLY MOUNTED CONCENTRICALLY WITHIN SAID CENTRIFUGAL BRAKE MEANS, AND MOTOR MEANS OPERATIVELY CONNECTED TO SAID CLUTCH ASSEMBLY, WHEREBY UPON ENERGIZATION OF SAID MOTOR MEANS, THE CLUTCH ASSEMBLY IS ROTATED TO CAUSE ROTATION OF SAID CENTRIFUGAL BRAKE MEANS WHILE SIMULTANEOUSLY ROTATING THE REVOLVING DOOR SHAFT THROUGH THE GEAR TRAIN; SAID MAIN GEAR, GEAR TRAIN MEANS, CENTRIFUGAL BRAKE MEANS AND
Claim 2
Dependent Claim
128 words
A REVOLVING DOOR OPERATING MECHANISM AND SPEED CONTROL DEVICE OF THE CHARACTER DESCRIBED COMPRISING, A HOUSING, A MAIN GEAR ROTATABLY MOUNTED WITHIN SAID HOUSING, SAID MAIN GEAR BEING ADAPTED TO BE SECURED TO THE REVOLVING DOOR SHAFT, CENTRIFUGAL BRAKE MEANS POSITIONED WITHIN THE HOUSING, GEAR TRAIN MEANS ROTATABLY MOUNTED WITHIN THE HOUSING, SAID GEAR TRAIN MEANS BEING OPERATIVELY CONNECTED BETWEEN THE MAIN GEAR AND THE CENTRIFUGAL BRAKE MEANS, A CLUTCH ASSEMBLY MOUNTED CONCENTRICALLY WITHIN SAID CENTRIFUGAL BRAKE MEANS, AND MOTOR MEANS OPERATIVELY CONNECTED TO SAID CLUTCH ASSEMBLY, WHEREBY UPON ENERGIZATION OF SAID MOTOR MEANS, THE CLUTCH ASSEMBLY IS ROTATED TO CAUSE ROTATION OF SAID CENTRIFUGAL BRAKE MEANS WHILE SIMULTANEOUSLY ROTATING THE REVOLVING DOOR SHAFT THROUGH THE GEAR TRAIN; SAID MAIN GEAR, GEAR TRAIN MEANS, CENTRIFUGAL BRAKE MEANS AND
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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |