Patent US4121127A successfully refreshed from Google Patents.
US4121127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
External-rotor type drum motor
Assignee: Siemens AG
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Filing: 1977-02-15
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Granted: 1978-10-17
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Expires: 1997-02-15
Abstract
Abstract An external-rotor type drum motor in which the rotor includes axially extending members to which are fastened the respective end bells of the motor. The motor is further provided with a drum cylinder which surrounds the rotor and the end bells and is secured axially by means of a ring which is bolted to one of the end bells and rests against an inner shoulder formed on the drum cylinder.
Inventors
- 👤 Hans-Joachim Adelski
- 👤 Wilhelm Gertz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:17
CPC Classifications
H; H02; H02K; H02K21/00; H02K21/46; H02K17/00; H02K17/02; H02K17/16; H02K5/00; H02K5/04; H02K5/16; H02K5/173; H02K5/1737
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
An external-rotor type drum motor comprising: a rotor having first and second portions extending axially in opposite directions, said first and second portions forming parts of the shorting ring of said rotor; first and second end bells fastened to the ends of said first and second portions, respectively; a drum cylinder serving as the return yoke for said rotor, said drum cylinder surrounding said rotor and end bells and having first and second inner shoulders at its ends adjacent said first and second end bells, respectively, said first inner shoulder resting against said first end bell; a ring for securing said drum cylinder in the axial direction, said ring being fastened to said second end bell and resting against said second inner shoulder of said drum.
Claim 2
Dependent Claim
126 words
An external-rotor type drum motor comprising: a rotor having first and second portions extending axially in opposite directions, said first and second portions forming parts of the shorting ring of said rotor; first and second end bells fastened to the ends of said first and second portions, respectively; a drum cylinder serving as the return yoke for said rotor, said drum cylinder surrounding said rotor and end bells and having first and second inner shoulders at its ends adjacent said first and second end bells, respectively, said first inner shoulder resting against said first end bell; a ring for securing said drum cylinder in the axial direction, said ring being fastened to said second end bell and resting against said second inner shoulder of said drum.
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) | 1981-10-16 | 1982-04-17 | 1982-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-16 | 1986-04-17 | 1986-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-16 | 1990-04-17 | 1990-10-17 | $7700.00 | Window Closed / Lapsed |