Patent US3422704A successfully refreshed from Google Patents.
US3422704A
Expired / Lapsed
US
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Automatic door operator
Assignee: Roto Swing Inc
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Filing: 1967-01-31
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Granted: 1969-01-21
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Expires: 1987-01-31
Abstract
No abstract record available.
Inventors
- 👤 John C Catlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:27
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/611; E05F15/614; E05Y; E05Y2201/00; E05Y2201/20; E05Y2201/23; E05Y2201/232; E05Y2201/236; E05Y2201/60; E05Y2201/622; E05Y2201/71; E05Y2201/72; E05Y2400/00; E05Y2400/10; E05Y2400/30; E05Y2400/3013; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A DOOR OPERATOR FOR OPENING AND CLOSING A DOOR AND COMPRISING POWER MEANS, PLANETARY GEAR MEANS OPERABLY CONNECTED WITH THE POWER MEANS FOR ACTUATION THEREBY, CLUTCH MEANS CONNECTED WITH THE PLANETARY GEAR MEANS, SHAFT MEANS ADAPTED FOR CONNECTION WITH THE DOOR FOR SIMULTANEOUS ROTATION THEREWITH DURING AN OPENING AND CLOSING OPERATION, GEAR MEANS COOPERATING BETWEEN THE CLUTCH MEANS AND SHAFT MEANS FOR TRANSMITTING ROTATION THEREBETWEEN, AND TORSIONAL SPRING MEANS CONNECTED WITH THE CLUTCH MEANS AND COOPERATING THEREWITH FOR RETURNING THE DOOR TO A CLOSED POSITION SUBSEQUENT TO THE OPENING THEREOF.
Claim 2
Dependent Claim
90 words
A DOOR OPERATOR FOR OPENING AND CLOSING A DOOR AND COMPRISING POWER MEANS, PLANETARY GEAR MEANS OPERABLY CONNECTED WITH THE POWER MEANS FOR ACTUATION THEREBY, CLUTCH MEANS CONNECTED WITH THE PLANETARY GEAR MEANS, SHAFT MEANS ADAPTED FOR CONNECTION WITH THE DOOR FOR SIMULTANEOUS ROTATION THEREWITH DURING AN OPENING AND CLOSING OPERATION, GEAR MEANS COOPERATING BETWEEN THE CLUTCH MEANS AND SHAFT MEANS FOR TRANSMITTING ROTATION THEREBETWEEN, AND TORSIONAL SPRING MEANS CONNECTED WITH THE CLUTCH MEANS AND COOPERATING THEREWITH FOR RETURNING THE DOOR TO A CLOSED POSITION SUBSEQUENT TO THE OPENING THEREOF.
References Cited (Backward Citations)
US2249441A
Cited
US2484364A
Cited
US2956451A
Cited
US3258995A
Cited
US3222954A
Cited
US3277747A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |