US3593049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dc midget motor free of commutator and slip rings
Assignee: Siemens AG
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Filing: 1969-10-02
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Granted: 1971-07-13
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Expires: 1989-10-02
Abstract
Abstract Midget motor free of commutator or sliprings provided with a permanent magnet system secured to the shaft of the motor, a stationary armature winding mounted on a winding frame member, and a magnetic yoke surrounding the latter. The bearings for the rotor shaft adjoin the winding frame member, which is preferably of drum-shaped construction, both bearings being located in respective hub-shaped appendages of the end walls of the winding frame member.
Inventors
- 👤 Werner Dittrich
- 👤 Klaus-Dieter Wahnschaffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:36
CPC Classifications
H; H02; H02K; H02K3/00; H02K29/00; H02K29/06; H02K29/08
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
95 words
DC midget motor free of commutator and sliprings, comprising a shaft for the motor, a permanent magnet system mounted on said shaft, a stationary armature winding mounted on a winding frame member and surrounding said permanent magnet system, a magnetic yoke surrounding said armature winding, and bearings for said shaft adjoining said winding frame member, said magnetic yoke including a casing tube for the motor, plate members located at the ends of said casing tube, and said winding frame member having a plurality of longitudinally extending ribs in formlocking engagement with said end plate members.
Claim 2
Dependent Claim
95 words
DC midget motor free of commutator and sliprings, comprising a shaft for the motor, a permanent magnet system mounted on said shaft, a stationary armature winding mounted on a winding frame member and surrounding said permanent magnet system, a magnetic yoke surrounding said armature winding, and bearings for said shaft adjoining said winding frame member, said magnetic yoke including a casing tube for the motor, plate members located at the ends of said casing tube, and said winding frame member having a plurality of longitudinally extending ribs in formlocking engagement with said end plate members.
Claim 3
Dependent Claim
22 words
DC midget motor according to claim 1, wherein said winding frame member is of bipartite construction, both parts thereof being joinable interlockingly.
Claim 4
Dependent Claim
26 words
DC midget motor according to claim 1, wherein said winding frame member consists of two interlocking parts, both of said parts being of substantially identical construction.
Claim 5
Dependent Claim
29 words
DC midget motor according to claim 1, wherein said winding frame member has a cylindrical portion, at least said cylindrical portion of said winding frame member being longitudinally divided.
Claim 6
Dependent Claim
76 words
DC midget motor according to claim 1, wherein said winding frame member is of drum-shaped construction and has end walls, said bearings for said shaft being calotte bearings located at the inner surface of said end walls, said winding frame member being formed with projections adjacent said bearings, and leaf spring means insertably anchored in said projections being engageable with said bearings for biasing said bearings against the respective end walls of said winding frame member.
Claim 7
Dependent Claim
33 words
DC midget motor according to claim 1, wherein said stationary winding has a plurality of phases each of which is subdivided into two component windings, said component windings of each phase being bifilar.
Claim 8
Dependent Claim
19 words
DC midget motor according to claim 1, wherein said magnetic yoke comprises a plurality of annular discs joined together.
Claim 9
Dependent Claim
44 words
DC midget motor according to claim 1, wherein said magnetic yoke comprises a plurality of axially aligned annular discs received in a tubular member coaxial therewith, said discs being joined together by deformation of said tubular member to form a packet of disc laminations.
Claim 10
Dependent Claim
23 words
DC midget motor according to claim 1, wherein one of said two end plate members is in the form of a connector support.
Claim 11
Dependent Claim
22 words
DC midget motor according to claim 9, including connector fins held in form-locking engagement in said connector support by crimps formed therein.
Claim 12
Dependent Claim
22 words
DC midget motor according to claim 9, including connector fins held in form-locking engagement in said connector support by folds formed therein.
Claim 13
Dependent Claim
26 words
DC midget motor according to claim 9, wherein said connector support is provided with ribs for securing at least one ferromagnetic collector sheet in form-locking engagement.
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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |