US3903647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic sliding door
Assignee: Kawneer Co Inc
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Filing: 1974-10-03
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Granted: 1975-09-09
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Expires: 1994-10-03
Abstract
Abstract An automatic sliding door with a safety device for preventing the closure of the door when an object is encountered includes a sliding door mounted for movement along an upper track toward and away from a door jamb. A pressure sensitive nose member is mounted along leading edge of the door and causes activation of a safety switch for controlling the door to open when an object is encountered by the nose member during closing movement. The safety switch is mounted in a housing which supports an elongated actuator extending parallel of the door track and facing an upper portion of the sliding door. The actuator is mounted for pivotal movement toward and away from the door about an axis parallel of the track and engages the safety switch to maintain normal operation until a contact member on the door is retracted from the actuator. The contact member is normally engaged in sliding contact with the elongated actuator as the door opens and closes. The pressure sensitive nose member on the leading edge of the door is adapted to withdraw the contact member away from the actuator upon engagement of the nose member with an obstruction during a closing movement and this activates the control system to move the door to the open position.
Inventors
- 👤 S Eugene Hubbard
- 👤 Richard A Meisterheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:57
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/40; E05F15/42; E05F15/48; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
180 words
A safety device for an automatic electrically controlled sliding door mounted for movement along an upper track toward and away from a door jamb adjacent a leading edge of said door in a closed position, said safety device comprising an elongated actuator extended parallel of said track and facing an upper portion of said sliding door, said actuator pivotally mounted for movement toward and away from said upper portion of said door about an axis parallel of said track, safety switch means intermediate the length of said actuator responsive to movement thereof toward and away from said door for actuating the electrical control of said door to open the same, a contact member on said door positioned for sliding contact with said elongated actuator as said door opens and closes for normally maintaining said actuator in a pivotal position away from said door and pressure sensitive means carried adjacent said leading edge of said door interconnected to withdraw said contact member away from said actuator upon engagement of said pressure sensitive means with an obstruction during closing of said door.
Claim 2
Dependent Claim
180 words
A safety device for an automatic electrically controlled sliding door mounted for movement along an upper track toward and away from a door jamb adjacent a leading edge of said door in a closed position, said safety device comprising an elongated actuator extended parallel of said track and facing an upper portion of said sliding door, said actuator pivotally mounted for movement toward and away from said upper portion of said door about an axis parallel of said track, safety switch means intermediate the length of said actuator responsive to movement thereof toward and away from said door for actuating the electrical control of said door to open the same, a contact member on said door positioned for sliding contact with said elongated actuator as said door opens and closes for normally maintaining said actuator in a pivotal position away from said door and pressure sensitive means carried adjacent said leading edge of said door interconnected to withdraw said contact member away from said actuator upon engagement of said pressure sensitive means with an obstruction during closing of said door.
Claim 3
Dependent Claim
48 words
The safety device of claim 1 including an elongated housing for supporting and enclosing said actuator and said safety switch means, said housing having an elongated opening along one side facing said door for receiving said contact member in sliding contact with said actuator mounted in said housing.
Claim 4
Dependent Claim
14 words
The safety device of claim 2 wherein said housing and actuator are pivotally interconnected.
Claim 5
Dependent Claim
59 words
The safety device of claim 3 wherein said housing is formed with a longitudinal groove on an inside surface of substantially circular transverse cross-section, said actuator having an elongated enlarged edge portion of substantially circular transverse cross-section and received in said groove to permit pivotal movement of said actuator toward and away from said opening in said housing side.
Claim 6
Dependent Claim
19 words
The safety device of claim 3 wherein said housing and actuator are pivotally interconnected substantially the entire length thereof.
Claim 7
Dependent Claim
24 words
The safety device of claim 5 wherein said pivotal interconnection between said housing and actuator comprises a ball and socket profile in transverse cross-section.
Claim 8
Dependent Claim
56 words
The apparatus of claim 4 wherein groove is formed on a top wall of said housing and opens facing downwardly, said enlarged edge of said actuator being formed along an upper edge thereof, said actuator further including a body portion depending downwardly of said upper edge pivotal toward and away from said opening in said housing.
Claim 9
Dependent Claim
46 words
The apparatus of claim 7 wherein said actuator includes an elongated rail portion extending outwardly of said body portion toward said opening of said housing, said rail portion having an outer face for sliding contact with said contact member as said door is opened and closed.
References Cited (Backward Citations)
US2791808A
Cited
US3168165A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |