Patent US4103689A successfully refreshed from Google Patents.
US3280550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrothermal motors
Assignee: Individual
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Filing: 1964-09-01
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Granted: 1966-10-25
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Expires: 1984-09-01
Abstract
No abstract record available.
Inventors
- 👤 Robert J Cassidy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:58
CPC Classifications
F; F03; F03G; F03G7/00; F03G7/06; F03G7/061; F03G7/06114; F03G7/064; F03G7/0641
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
AN ELECTROTHERMAL MOTOR COMPRISING A STATOR STRUCTURE, A ROTOR STRUCTURE JOURNALED FOR ROTATION UPON THE STATOR STRUCTURE AND INCLUDING AN ANNULAR SIDE WALL, A THERMALLY EXPANSIBLE AND CONTRACTIBLE RESISTANCE WIRE ELEMENT MOUNTED UPON THE STATOR STRUCTURE, MEANS TO SUPPLY CURRENT PULSES TO SAID WIRE ELEMENT TO ALTERNATELY HEAT AND COOL THE SAME, AND MECHANICAL MEANS ON THE STATOR STRUCTURE AND CONNECTED WITH SAID WIRE ELEMENT AND MOVED BY THE CYCLIC EXPANSION AND CONTRACTION OF THE WIRE ELEMENT AND INCLUDING A RESILIENT LEVER DIRECTLY FRICTIONALLY ENGAGING THE ANNULAR SIDE WALL AT AN ARCUTE ANGLE THERETO TO ADVANCE THE SIDE WALL IN A STEP-BY-STEP MANNER IN ONE DIRECTION.
Claim 2
Dependent Claim
106 words
AN ELECTROTHERMAL MOTOR COMPRISING A STATOR STRUCTURE, A ROTOR STRUCTURE JOURNALED FOR ROTATION UPON THE STATOR STRUCTURE AND INCLUDING AN ANNULAR SIDE WALL, A THERMALLY EXPANSIBLE AND CONTRACTIBLE RESISTANCE WIRE ELEMENT MOUNTED UPON THE STATOR STRUCTURE, MEANS TO SUPPLY CURRENT PULSES TO SAID WIRE ELEMENT TO ALTERNATELY HEAT AND COOL THE SAME, AND MECHANICAL MEANS ON THE STATOR STRUCTURE AND CONNECTED WITH SAID WIRE ELEMENT AND MOVED BY THE CYCLIC EXPANSION AND CONTRACTION OF THE WIRE ELEMENT AND INCLUDING A RESILIENT LEVER DIRECTLY FRICTIONALLY ENGAGING THE ANNULAR SIDE WALL AT AN ARCUTE ANGLE THERETO TO ADVANCE THE SIDE WALL IN A STEP-BY-STEP MANNER IN ONE DIRECTION.
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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |