US3237932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic door operator
Assignee: Roto Swing Inc
•
Filing: 1962-10-10
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Granted: 1966-03-01
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Expires: 1982-10-10
Abstract
No abstract record available.
Inventors
- 👤 John C Catlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:45
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/611; E05F15/614; E05F3/00; E05F3/04; E05F3/10; E05F3/102; E05Y; E05Y2201/00; E05Y2201/10; E05Y2201/11; E05Y2400/00; E05Y2400/10; E05Y2400/30; E05Y2400/302; E05Y2600/00; E05Y2600/40; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A DOOR OPERATOR FOR OPENING AND CLOSING A DOOR AND COMPRISING A MOTOR HAVING A PERMANENT MAGNETIC FIELD, AND A ROTATABLE ARMATURE, MEANS FOR CONNECTING SAID MOTOR TO SAID DOOR INCLUDING GEAR MEANS ROTATED BY THE MOTOR, RACK AND GEAR MEANS, FREE WHEELING MEANS FOR TRANSLATING THE MOVEMENT FROM THE FIRST GEAR MEANS TO THE RACK AND GEAR MEANS FOR MOVEMENT THEREOF IN ONE DIRECTION TO OPEN THE DOOR, MEANS ACTUATED UPON OPENING OF THE DOOR FOR STALLING THE MOTOR TO RETAIN THE DOOR IN THE FULL OPENED POSITION FOR A PREDETERMINED TIME PERIOD, RESILIENT MEANS COOPERATING WITH THE RACK AND
Claim 2
Dependent Claim
101 words
A DOOR OPERATOR FOR OPENING AND CLOSING A DOOR AND COMPRISING A MOTOR HAVING A PERMANENT MAGNETIC FIELD, AND A ROTATABLE ARMATURE, MEANS FOR CONNECTING SAID MOTOR TO SAID DOOR INCLUDING GEAR MEANS ROTATED BY THE MOTOR, RACK AND GEAR MEANS, FREE WHEELING MEANS FOR TRANSLATING THE MOVEMENT FROM THE FIRST GEAR MEANS TO THE RACK AND GEAR MEANS FOR MOVEMENT THEREOF IN ONE DIRECTION TO OPEN THE DOOR, MEANS ACTUATED UPON OPENING OF THE DOOR FOR STALLING THE MOTOR TO RETAIN THE DOOR IN THE FULL OPENED POSITION FOR A PREDETERMINED TIME PERIOD, RESILIENT MEANS COOPERATING WITH THE RACK AND
References Cited (Backward Citations)
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US2874960A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |