US3604222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stator arrangement
Assignee: Licentia Patent Verwaltungs GmbH
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Filing: 1969-05-12
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Granted: 1971-09-14
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Expires: 1989-05-12
Abstract
Abstract A drum-type washing machine includes a drum and an electric motor including a rotor which has a diameter approximately equal to that of the drum and a plurality of salient pole pieces made of soft magnetic material positioned at uniformly spaced angular positions about the rotor, and a segmented stator mounted on the support means and facing only a portion of the circumference of the rotor, the stator including a plurality of separate windings. Each of the stator windings is supplied with electric current at intervals in dependence of the position of the rotor in order to exert a reactance torque on the poles.
Inventors
- 👤 Werner Wutherich
- 👤 Edgar Zelle
- 👤 Heino Gerke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:28
CPC Classifications
H; H02; H02K; H02K19/00; H02K19/02; H02K19/10; H02K19/103; D; D06; D06F; D06F37/00; D06F37/30; D06F37/304
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
135 words
A drum-type washing machine comprising, in combination: a. support means; b. a drum mounted for rotation on said support means; c. an electric motor including 1. rotor means connected directly to said drum for driving the same and having a diameter which is approximately equal to that of said drum, said rotor means having a plurality of salient pole pieces made of soft magnetic material at uniformly spaced angular positions, and 2. segmented stator means mounted on said support means and facing only a portion of the circumference of said rotor means, said stator means including a plurality of separate windings; and d. means for cyclically supplying electric current to each of said stator windings at intervals in dependence on the position of said rotor means, thereby to exert a reactance torque on said poles.
Claim 2
Dependent Claim
135 words
A drum-type washing machine comprising, in combination: a. support means; b. a drum mounted for rotation on said support means; c. an electric motor including 1. rotor means connected directly to said drum for driving the same and having a diameter which is approximately equal to that of said drum, said rotor means having a plurality of salient pole pieces made of soft magnetic material at uniformly spaced angular positions, and 2. segmented stator means mounted on said support means and facing only a portion of the circumference of said rotor means, said stator means including a plurality of separate windings; and d. means for cyclically supplying electric current to each of said stator windings at intervals in dependence on the position of said rotor means, thereby to exert a reactance torque on said poles.
Claim 3
Dependent Claim
81 words
The combination defined in claim 1 wherein said stator means comprises a group containing n ferromagnetic cores of U-shape which are mounted on the support means opposite the rotor at uniformly spaced angular positions, the angular spacing of each core from the next being: (K+ 1/n X (rotor pole pitch) where k is a whole number 0,1,2,...nis the number of cores in the group, and the rotor pole pitch is the angular distance from center to center of adjacent pole pieces.
Claim 4
Dependent Claim
63 words
segmented stator means mounted on said support means and facing only a portion of the circumference of said rotor means, said stator means including a plurality of separate windings; and d. means for cyclically supplying electric current to each of said stator windings at intervals in dependence on the position of said rotor means, thereby to exert a reactance torque on said poles.
Claim 5
Dependent Claim
63 words
segmented stator means mounted on said support means and facing only a portion of the circumference of said rotor means, said stator means including a plurality of separate windings; and d. means for cyclically supplying electric current to each of said stator windings at intervals in dependence on the position of said rotor means, thereby to exert a reactance torque on said poles.
Claim 6
Dependent Claim
17 words
The combination defined in claim 2 wherein there are a plurality of said groups of stator cores.
Claim 7
Dependent Claim
40 words
The combination defined in claim 2 wherein said rotor poles are distributed on the periphery of said drum and said stator cores are distributed on a wall connected to the support means which is opposite the periphery of said drum.
Claim 8
Dependent Claim
38 words
The combination defined in claim 2 wherein said rotor poles are mounted on a radially extending wall of said drum, and said stator cores are mounted on a wall of the support means which is opposite said drum.
Claim 9
Dependent Claim
45 words
The combination defined in claim 1 including means for sensing fluctuations in the magnetic field conductivity in a radial direction on the periphery of the rotor, and means for producing control pulses in response to said fluctuations for commutating current flowing in said stator windings.
Claim 10
Dependent Claim
33 words
The combination defined in claim 6 wherein said means for sensing fluctuations include elements mounted on the support means opposite a point on the rotor periphery which is not charged by the stator.
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) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |