Patent US3708915A successfully refreshed from Google Patents.
US3708915A
Expired / Lapsed
US
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Apparatus for operating swing doors
Assignee: MORRIS H Ltd
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Filing: 1971-01-25
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Granted: 1973-01-09
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Expires: 1991-01-25
Abstract
Abstract Apparatus for operating swing doors or other members through a predetermined angle in which one member of a linear motor is mounted on a stationary frame extending horizontally above the door, a pin or roller on the door engaging a slot in the moving member of the motor to pivot the door from an open to a closed position and visa versa with limit switches and limit actuators at each end of the stroke of the moving member to cut off and reverse the motor.
Inventors
- 👤 A Davey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:56
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
136 words
Apparatus for operating pivoted swing doors comprising a frame adapted to be mounted adjacent the door, rail means extending longitudinally of said frame, a linear electric motor carried by said frame and having a reciprocable door actuating member comprising a slotted element, roller means on said member engaging said rail means for guiding movement of said member relative to the door, the slot in said element being adapted to receive a pin movable with the door to be operated, said pin upon operative movement of said member being adapted to travel along said slot to swing the door betwEen open and closed positions, and an actuating electrical circuit for said motor comprising spaced limit switches positioned to be opened by said reciprocable member to deenergize said motor when said member reaches opposite ends of its movement.
Claim 2
Dependent Claim
136 words
Apparatus for operating pivoted swing doors comprising a frame adapted to be mounted adjacent the door, rail means extending longitudinally of said frame, a linear electric motor carried by said frame and having a reciprocable door actuating member comprising a slotted element, roller means on said member engaging said rail means for guiding movement of said member relative to the door, the slot in said element being adapted to receive a pin movable with the door to be operated, said pin upon operative movement of said member being adapted to travel along said slot to swing the door betwEen open and closed positions, and an actuating electrical circuit for said motor comprising spaced limit switches positioned to be opened by said reciprocable member to deenergize said motor when said member reaches opposite ends of its movement.
Claim 3
Dependent Claim
16 words
Apparatus as defined in claim 1, wherein said limit switches are adjustably mounted on said frame.
Claim 4
Dependent Claim
29 words
The apparatus defined in claim 1, wherein said circuit comprises selective means operable after the door has been opened for reversing and energizing said motor for closing said door.
Claim 5
Dependent Claim
34 words
The apparatus defined in claim 1, wherein said circuit comprises means operable after the door has been opened for automatically reversing and energizing said motor for closing the door after a predetermined time delay.
Claim 6
Dependent Claim
41 words
The apparatus defined in claim 1, wherein said circuit includes means actuated by a push button for starting the motor, and associated operating relays which hold the circuit closed during door movement until the motor is deenergized by a limit switch.
Claim 7
Dependent Claim
24 words
The apparatus defined in claim 5, wherein means is provided in said circuit for selectively reversing said motor during closing movement of the door.
Claim 8
Dependent Claim
38 words
The apparatus defined in claim 1, wherein said reciprocable motor member is a slotted plate, the slot extending angularly with respect to the direction of movement of said member and terminating in end regions parallel to said direction.
Claim 9
Dependent Claim
24 words
The apparatus defined in claim 1, in combination with a swinging door on which the pin is mounted for selective disengagement from said slot.
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |