US3087720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic door operator
Assignee: ROTOR SWING DOOR CO Inc
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Filing: 1959-10-08
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Granted: 1963-04-30
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Expires: 1979-10-08
Abstract
No abstract record available.
Inventors
- 👤 John C Catlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:11
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/611; E05F15/614; E05F15/616; E05F15/619; E05F15/622; E05F3/00; E05F3/04; E05F3/10; E05F3/102; E05Y; E05Y2201/00; E05Y2201/20; E05Y2201/21; E05Y2201/23; E05Y2201/246; E05Y2201/252; E05Y2201/26; E05Y2201/262; E05Y2201/266; E05Y2201/40; E05Y2201/46; E05Y2201/462; E05Y2201/60; E05Y2201/622; E05Y2201/71; E05Y2201/722; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A DOOR OPERATOR FOR OPENING AND CLOSING A DOOR AND COMPRISING A MOTOR, GEAR MEANS ROTATED BY THE MOTOR, A RECIPROCAL RACK MEMBER, FREE WHEELING MEANS FOR TRANSLATING THE ROTATIONAL MOVEMENT OF THE GEAR MEANS TO THE RECIPROCAL MOVEMENT OF THE RACK MEMBER, SECOND GEAR MEANS ACTUATED BY THE RACK MEMBER UPON MOVEMENT THEREOF IN ONE DIRECTION FOR OPENING OF THE DOOR, SECOND RACK MEANS FOR ACTUATION OF THE SECOND GEAR MEANS INDEPENDENTLY FROM THE FIRST RACK MEANS, SPRING BIASED MEANS PROVIDING FOR RECIPROCAL MOVEMENT OF THE SECOND RACK MEANS IN ONE DIRECTION FOR ACTUATION OF THE SECOND GEAR MEANS TO CLOSE THE DOOR, AND HYDRAULIC DAMPING MEANS COOPERATING WITH SAID LAST MENTIONED MEANS FOR CONTROLLING THE SPEED OF CLOSING OF THE DOOR.
Claim 2
Dependent Claim
123 words
A DOOR OPERATOR FOR OPENING AND CLOSING A DOOR AND COMPRISING A MOTOR, GEAR MEANS ROTATED BY THE MOTOR, A RECIPROCAL RACK MEMBER, FREE WHEELING MEANS FOR TRANSLATING THE ROTATIONAL MOVEMENT OF THE GEAR MEANS TO THE RECIPROCAL MOVEMENT OF THE RACK MEMBER, SECOND GEAR MEANS ACTUATED BY THE RACK MEMBER UPON MOVEMENT THEREOF IN ONE DIRECTION FOR OPENING OF THE DOOR, SECOND RACK MEANS FOR ACTUATION OF THE SECOND GEAR MEANS INDEPENDENTLY FROM THE FIRST RACK MEANS, SPRING BIASED MEANS PROVIDING FOR RECIPROCAL MOVEMENT OF THE SECOND RACK MEANS IN ONE DIRECTION FOR ACTUATION OF THE SECOND GEAR MEANS TO CLOSE THE DOOR, AND HYDRAULIC DAMPING MEANS COOPERATING WITH SAID LAST MENTIONED MEANS FOR CONTROLLING THE SPEED OF CLOSING OF THE DOOR.
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) | 1966-04-29 | 1966-10-29 | 1967-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-29 | 1970-10-29 | 1971-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-29 | 1974-10-29 | 1975-04-30 | $7700.00 | Window Closed / Lapsed |