US3717954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor driven operating mechanism for revolving doors
Assignee: Individual
•
Filing: 1971-10-20
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Granted: 1973-02-27
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Expires: 1991-10-20
Abstract
Abstract A motor driven revolving door operating mechanism including a main gear connected to the revolving door shaft, a centrifugal brake assembly, a gear train assembly connected between the main gear and centrifugal brake assembly and a drive motor connected to the gear train assembly, the motor being disposed in the same horizontal plane as the main gear; the main gear, centrifugal brake assembly, gear train assembly and motor all being positioned within a housing in spaced, parallel, closely adjacent horizontal planes to thereby form a low-profile motor driven operating mechanism adapted for selective installation in either an overhead or floor-type revolving door installation.
Inventors
- 👤 A Sheckells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:37
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/608; E05Y; E05Y2201/00; E05Y2201/20; E05Y2201/23; E05Y2201/232; E05Y2201/242; E05Y2800/00; E05Y2800/20; E05Y2800/23; E05Y2800/234; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2186
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
110 words
A motor driven operating mechanism for a revolving door comprIsing, a housing, a main gear rotatably mounted within said housing, said main gear adapted for connection to the revolving door shaft, a motor mounted within said housing and disposed in substantially the same horizontal plane as the main gear, and gear train means rotatably mounted within the housing and operatively connected between the main gear and said motor, said main gear, gear train means and motor all being positioned within said housing in spaced, parallel, closely adjacent horizontal planes to thereby form a low-profile motor driven operating mechanism for selective installation in either an overhead or floor-type revolVing door installation.
Claim 2
Dependent Claim
110 words
A motor driven operating mechanism for a revolving door comprIsing, a housing, a main gear rotatably mounted within said housing, said main gear adapted for connection to the revolving door shaft, a motor mounted within said housing and disposed in substantially the same horizontal plane as the main gear, and gear train means rotatably mounted within the housing and operatively connected between the main gear and said motor, said main gear, gear train means and motor all being positioned within said housing in spaced, parallel, closely adjacent horizontal planes to thereby form a low-profile motor driven operating mechanism for selective installation in either an overhead or floor-type revolVing door installation.
Claim 3
Dependent Claim
65 words
A revolving door operating mechanism accordIng to claim 1, wherein the knock-out portion is formed in the bottom wall of the housing, said knock-out portion being removable from the housing wall for receiving the revolving door shaft when the mechanism is mounted in an overhead-type revolving door installation, said portion remaining in the wall when the mechanism is mounted in a floor-type revolving door installation.
Claim 4
Dependent Claim
25 words
A revolving door operating mechanism according to claim 1, wherein an over-running clutch assembly is operatively connected between said gear train means and said motor.
Claim 5
Dependent Claim
55 words
A revolving door operating mechanism according to claim 1, wherein a centrifugal brake assembly is positioned within said housing, said gear train means being operatively connected to said centrifugal brake assembly; said main gear, gear train means, centrifugal brake assembly and motor all being positioned within said housing in spaced, parallel, closely adjacent horizontal planes.
Claim 6
Dependent Claim
75 words
A revolving door operating mechanism according to claim 4, wherein a volume of lubricating fluid is contained in the housing and being at all times in contact with the braking surface of the centrifugal brake assembly and the gear train means upon rotation of the revolving door shaft, whereby upon rotation of the shaft beyond a predetermined speed the centrifugal brake assembly is actuated to smoothly govern the speed of rotation of the revolving door.
Claim 7
Dependent Claim
35 words
A revolving door operating mechanism according to claim 5, wherein a partition is mounted within the housing between the motor and the centrifugal brake assembly to seal the motor from the volume of lubricating fluid.
Claim 8
Dependent Claim
32 words
A revolving door operating mechanism according to claim 1, wherein the motor comprises, a ''''pancake-type'''' motor having its armature and stator contained in substantially the same horizontal plane as the main gear.
Claim 9
Dependent Claim
21 words
A revolving door operating mechanism according to claim 7, wherein the brushes for the motor are mounted on the housing cover.
Claim 10
Dependent Claim
22 words
A revolving door operating mechanism according to claim 7, wherein the motor is mOunted concentrically with respect to the centrifugal brake assembly.
Claim 11
Dependent Claim
22 words
A revolving door operating mechanism according to claim 9, wherein the motor armature is keyed to the centrifugal brake assembly drive shaft.
Claim 12
Dependent Claim
27 words
A revolving door operating mechanism according to claim 9, wherein an over-running clutch assembly is mounted between the motor armature and the centrifugal brake assembly drive shaft.
Claim 13
Dependent Claim
25 words
A revolving doOr operating mechanism according to claim 7, wherein the motor aS positIoned within the housing between the main gear and centrifugal brake assembly.
Claim 14
Dependent Claim
25 words
A revolving door operating mechanism according to claim 7, wherein the centrifugal brake assembly is positioned within the housing between the main gear and motor.
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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |