US3349876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Revolving door operating mechanism and speed controller
Assignee: International Steel Co
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Filing: 1967-03-06
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Granted: 1967-10-31
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Expires: 1987-03-06
Abstract
No abstract record available.
Inventors
- 👤 Amuel E Sheckells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:15
CPC Classifications
F; F16; F16H; F16H59/00; F16H59/36; F16H59/38; E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/608; F16H1/00; F16H1/02; F16H1/20; F16H1/203; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 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, A SHAFT HAVING ONE END CONNECTED TO SAID CENTRIFUGAL BRAKE MEANS, GEAR TRAIN MEANS ROTATABLY MOUNTED WITHIN THE HOUSING, SAID GEAR TRAIN MEANS BEING OPERATIVELY CONNECTED BETWEEN THE MAIN GEAR AND THE OPPOSITE END OF SAID SHAFT, A ROLLER CLUTCH BEARING ASSEMBLY MOUNTED ON SAID SHAFT CONCENTRICALLY THEREWITH AND INTERMEDIATE THE ENDS THEREOF, AND MOTOR MEANS OPEAATIVELY CONNECTED TO SAID CLUTCH ASSEMBLY, WHEREBY UPON ENERGIZATION OF SAID MOTOR MEANS, THE CLUTCH ASSEMBLY IS ROTATED TOGETHER WITH SAID SHAFT TO CAUSE ROTATION OF SAID CENTRIFUGAL BRAKE MEANS WHILE SIMULTANEOUSLY ROTATING THE ROVOLVING DOOR SHAFT THROUGH THE GEAR TRAIN; SAID MAIN GEAR, GEAR TRAIN MEANS, CENTRIFUGAL BRAKE MEANS AND CLUTCH ASSEMBLY, ALL BEING POSITIONED WITHIN SAID HOUSING IN SPACED, PARALLEL, CLOSELY ADJACENT HORIZONTAL PLANES TO THEREBY FORM A LOW-PROFILE OPERATING MECHANISM AND SPEED CONTROL DEVICE ADAPTED FOR SELECTIVELY INSTALLATION IN EITHER AN OVERHEAD OR FLOOR-TYPE REVOLVING DOOR INSTALLATION.
Claim 2
Dependent Claim
190 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, A SHAFT HAVING ONE END CONNECTED TO SAID CENTRIFUGAL BRAKE MEANS, GEAR TRAIN MEANS ROTATABLY MOUNTED WITHIN THE HOUSING, SAID GEAR TRAIN MEANS BEING OPERATIVELY CONNECTED BETWEEN THE MAIN GEAR AND THE OPPOSITE END OF SAID SHAFT, A ROLLER CLUTCH BEARING ASSEMBLY MOUNTED ON SAID SHAFT CONCENTRICALLY THEREWITH AND INTERMEDIATE THE ENDS THEREOF, AND MOTOR MEANS OPEAATIVELY CONNECTED TO SAID CLUTCH ASSEMBLY, WHEREBY UPON ENERGIZATION OF SAID MOTOR MEANS, THE CLUTCH ASSEMBLY IS ROTATED TOGETHER WITH SAID SHAFT TO CAUSE ROTATION OF SAID CENTRIFUGAL BRAKE MEANS WHILE SIMULTANEOUSLY ROTATING THE ROVOLVING DOOR SHAFT THROUGH THE GEAR TRAIN; SAID MAIN GEAR, GEAR TRAIN MEANS, CENTRIFUGAL BRAKE MEANS AND CLUTCH ASSEMBLY, ALL BEING POSITIONED WITHIN SAID HOUSING IN SPACED, PARALLEL, CLOSELY ADJACENT HORIZONTAL PLANES TO THEREBY FORM A LOW-PROFILE OPERATING MECHANISM AND SPEED CONTROL DEVICE ADAPTED FOR SELECTIVELY INSTALLATION IN EITHER AN OVERHEAD OR FLOOR-TYPE REVOLVING DOOR INSTALLATION.
References Cited (Backward Citations)
US2128531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |