US4359761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor with multiple shafts
Assignee: Papst Licensing GmbH and Co KG
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Filing: 1979-07-23
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Granted: 1982-11-16
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Expires: 1999-07-23
Abstract
Abstract An electric motor is provided with a stator and at least two armatures. In order to obtain a well adjustable and mechanically stable drive module, the stator is designed as the base plate of a multiple-shaft driving means.
Inventors
- 👤 Georg Papst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:56
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/26; H; H02; H02K; H02K16/00; H02K16/02; H02K7/00; H02K7/14
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
69 words
A multiple shaft driving apparatus comprising a single base plate formed with a plurality of recesses opening into a major surface of the plate; said plate being of a magnetic material; a plurality of electric motors having the shafts of their armatures arranged for rotation in respective recesses; and the stators of said motors being formed by the walls of said recesses and being magnetically interconnected by said plate.
Claim 2
Dependent Claim
69 words
A multiple shaft driving apparatus comprising a single base plate formed with a plurality of recesses opening into a major surface of the plate; said plate being of a magnetic material; a plurality of electric motors having the shafts of their armatures arranged for rotation in respective recesses; and the stators of said motors being formed by the walls of said recesses and being magnetically interconnected by said plate.
Claim 3
Dependent Claim
28 words
The apparatus as defined in claim 1 wherein said shafts and said major surface of said base plate support respectively, movable component parts of a magnetic tape recorder.
Claim 4
Dependent Claim
20 words
The apparatus as defined in claim 2 wherein a pair of said shaft drives a cassette of a cassette-type recorder.
Claim 5
Dependent Claim
21 words
The apparatus as defined in claim 1 wherein said stators further include means for adjusting magnetic field in said base plate.
Claim 6
Dependent Claim
23 words
The apparatus as defined in claim 4 wherein said means are permanent magnets for adjusting magnetic fluxes in respective stators in opposite directions.
Claim 7
Dependent Claim
21 words
The apparatus as defined in claim 4 wherein said means are coils operable for adjusting magnetic fluxes in a time sequence.
Claim 8
Dependent Claim
16 words
The apparatus as defined in claim 1 wherein said base plate is assembled of ferromagnetic sheets.
Claim 9
Dependent Claim
18 words
The apparatus as defined in claim 1 wherein said base plate is made of a one-piece ferromagnetic metal.
Claim 10
Dependent Claim
16 words
The apparatus as defined in claim 30 wherein said one-piece metal is a sintered metal material.
Claim 11
Dependent Claim
21 words
The apparatus as defined in claim 1 wherein said base plate is made of a synthetic material containing magnetically conductive particles.
Claim 12
Dependent Claim
20 words
The apparatus as defined in claim 1 wherein said stators include permanent magnets recessed in the walls of said recesses.
Claim 13
Dependent Claim
27 words
The apparatus as defined in claim 1 wherein said base plate includes a one-piece cover plate arranged on said major surface and supporting for rotation said rotors.
Claim 14
Dependent Claim
22 words
The apparatus as defined in claim 12 further including a control panel arranged at the opposite major surface of said base plate.
Claim 15
Dependent Claim
18 words
The apparatus as defined in claim 12 wherein said base plate and said cover plate are integrally connected.
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) | 1985-11-15 | 1986-05-17 | 1986-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-15 | 1990-05-17 | 1990-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-15 | 1994-05-17 | 1994-11-16 | $7700.00 | Window Closed / Lapsed |