Patent US3659676A successfully refreshed from Google Patents.
US3659676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring motor mechanism
Assignee: Individual
•
Filing: 1971-01-25
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Granted: 1972-05-02
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Expires: 1991-01-25
Abstract
Abstract A spring motor mechanism which is provided with a coil spring having one end attached to a power shaft and having the other end attached to an electric motor that is supported so as to describe an orbit around the spring during the winding of the spring when the motor is energized.
Inventors
- 👤 Fenwick L Witt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:33
CPC Classifications
F; F03; F03G; F03G1/00; F03G1/02; F03G1/022
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
69 words
In a spring motor mechanism the combination comprising a coil spring, a shaft, means attaching said shaft to one end of said spring, gear means adapted to be driven by said shaft, an electric motor, means attaching the other end of said coil spring to said electric motor, and means supporting said motor so that said motor Moves around said coil spring when energized and winds said coil spring.
Claim 2
Dependent Claim
69 words
In a spring motor mechanism the combination comprising a coil spring, a shaft, means attaching said shaft to one end of said spring, gear means adapted to be driven by said shaft, an electric motor, means attaching the other end of said coil spring to said electric motor, and means supporting said motor so that said motor Moves around said coil spring when energized and winds said coil spring.
Claim 3
Dependent Claim
42 words
In a spring motor mechanism the combination as set forth in claim 1, further characterized in that said motor supporting means includes a shaft provided to said motor and means attached to said motor shaft guiding said motor around said coil spring.
Claim 4
Dependent Claim
52 words
In a spring motor mechanism the combination as set forth in claim 2, further characterized in that said means attached to said motor shaft comprises a gear attached to each end of said motor shaft and fixed gears positioned on opposite sides of said coil spring engaged by said motor shaft gears.
Claim 5
Dependent Claim
44 words
In a spring motor mechanism the combination as set forth in claim 3, further characterized in that said motor and coil spring are positioned in a substantially cylindrical housing, and means supported on the inside of said housing feeding electric current to said motor.
Claim 6
Dependent Claim
48 words
In a spring motor mechanism the combination as set forth in claim 4, further characterized in that said means feeding electric current to said motor comprises slip rings and insulation means supporting said slip rings on said housing, and brushes supported by said motor contacting said slip rings.
Claim 7
Dependent Claim
37 words
In a spring motor mechanism the combination as set forth in claim 5, further characterized in that said housing is provided with end plates and said fixed gears are attached to the inside of said end plates.
References Cited (Backward Citations)
US2154699A
Cited
US2182529A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |