US3955112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hermetically sealed rotor
Assignee: Individual
•
Filing: 1975-01-24
•
Granted: 1976-05-04
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Expires: 1995-01-24
Abstract
Abstract A hermetically sealed rotor as would form a component of either a single phase or a three phase electric motor. The rotor is positioned in close proximity to a conventional state of winding but is completely in hermetically sealed copper casing. A plurality of L-shaped pivotally mounted arms on the rotor swing outward to open a starting switch when the rotor picks up speed.
Inventors
- 👤 Otto W. Sell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:11
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; H02K5/128; H02K11/00; H02K11/20; H02K11/21; H02K11/23; Y; Y10; Y10S; Y10S417/00; Y10S417/902
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
66 words
A rotor in combination with a stator to form an electric motor comprising a core, windings in the core, a shaft through said core for rotatably mounting said core, a copper shield completely surrounding and hermetically sealing the core, a plurality of L-shaped arms pivotally attached at their ends to the core so that they swing outward toward the copper shield when the rotor is turning.
Claim 2
Dependent Claim
66 words
A rotor in combination with a stator to form an electric motor comprising a core, windings in the core, a shaft through said core for rotatably mounting said core, a copper shield completely surrounding and hermetically sealing the core, a plurality of L-shaped arms pivotally attached at their ends to the core so that they swing outward toward the copper shield when the rotor is turning.
Claim 3
Dependent Claim
20 words
The device of claim 1 wherein the arms have an iron portion on the transverse section of the L-shaped arm.
Claim 4
Dependent Claim
85 words
The device of claim 2 further including a housing surrounding said motor, a starting switch having two leaf spring arms and mounted on said housing outside of the copper shield and in proximity to the pivoted arms, electrical contacts on each arm to complete an electrical circuit when the contacts touch, and a magnet on one arm whereby said magnet is attracted to the iron portion of said pivoted arms when said arms swing outward to thereby open the electrical contacts of said starting switch.
References Cited (Backward Citations)
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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) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |