US3307660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Revolving door speed control device
Assignee: International Steel Co
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Filing: 1964-07-15
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Granted: 1967-03-07
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Expires: 1984-07-15
Abstract
No abstract record available.
Inventors
- 👤 Amuel E Sheckells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:30
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 SPEED CONTROL DEVICE OF THE CHARACTER DESCRIBED, COMPRISING A HOUSING, A MAIN GEAR TOTATABLY MOUNTED WITHIN SAID HOUSING, SAID MAIN GEAR ADAPTED FOR CONNECTION TO A REVOLVING DOOR SHAFT, A CENTRIFUGAL BRAKE ASSEMBLY INCLUDING BRAKING SURFACE 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 ASSEMBLY, WHEREBY UPON ROTATION OF THE REVOLVING DOOR, LUBRICATING FLUID BATH MEANS WITHIN SAID HOUSING, AND LUBRICATING FLUID PUMP MEANS OPERATIVELY CONNECTED TO THE LUBRICATING FLUID BATH MEANS AND SAID CENTRIFUGAL BRAKE ASSEMBLY AND OPERATIVE UPON ROTATION OF SAID CENTRIFUGAL BRAKE ASSEMBLY FOR DIRECTING A VOLUME OF LUBRICATING FLUID ONTO SAID BRAKING SURFACE MEANS IN SAID BRAKE ASSEMBLY UPON ACTUATION THEREOF.
Claim 2
Dependent Claim
128 words
A REVOLVING DOOR SPEED CONTROL DEVICE OF THE CHARACTER DESCRIBED, COMPRISING A HOUSING, A MAIN GEAR TOTATABLY MOUNTED WITHIN SAID HOUSING, SAID MAIN GEAR ADAPTED FOR CONNECTION TO A REVOLVING DOOR SHAFT, A CENTRIFUGAL BRAKE ASSEMBLY INCLUDING BRAKING SURFACE 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 ASSEMBLY, WHEREBY UPON ROTATION OF THE REVOLVING DOOR, LUBRICATING FLUID BATH MEANS WITHIN SAID HOUSING, AND LUBRICATING FLUID PUMP MEANS OPERATIVELY CONNECTED TO THE LUBRICATING FLUID BATH MEANS AND SAID CENTRIFUGAL BRAKE ASSEMBLY AND OPERATIVE UPON ROTATION OF SAID CENTRIFUGAL BRAKE ASSEMBLY FOR DIRECTING A VOLUME OF LUBRICATING FLUID ONTO SAID BRAKING SURFACE MEANS IN SAID BRAKE ASSEMBLY UPON ACTUATION THEREOF.
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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |