US4185214A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Miniature synchronous motor with vibration damper
Assignee: Sodeco Saia AG
•
Filing: 1978-08-21
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Granted: 1980-01-22
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Expires: 1998-08-21
Abstract
Abstract A miniature synchronous motor having a bell-shaped rotor and a damping body, freely mounted, but non-rotatable on the rotor shaft. The damping body being urged, at least substantially in a radial direction by a spring, the force of which also acts substantially equally for both bearings of the motor so as to reduce noise during operation.
Inventors
- 👤 Hermann Gerber
- 👤 Hans Plotscher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:48
CPC Classifications
G; G04; G04C; G04C3/00; G04C3/16
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
64 words
A miniature synchronous motor having a single damping body acting on the rotor, comprising a non-rotating damping body mounted for free rotation on the motor shaft, spring means acting on said body in one direction including a substantial radial component whereby said body is urged in an at least substantially radial direction against the shaft and radial play of the rotor is thereby prevented.
Claim 2
Dependent Claim
64 words
A miniature synchronous motor having a single damping body acting on the rotor, comprising a non-rotating damping body mounted for free rotation on the motor shaft, spring means acting on said body in one direction including a substantial radial component whereby said body is urged in an at least substantially radial direction against the shaft and radial play of the rotor is thereby prevented.
Claim 3
Dependent Claim
31 words
A motor according to claim 1, in which the force with which the damping body is urged is so directed that it subjects both motor bearings to a substantially equal load.
Claim 4
Dependent Claim
17 words
A motor according to claims 1 or 2, in which the motor bearings are of plastic material.
Claim 5
Dependent Claim
23 words
A motor according to claim 1, in which a spring which is supported against a fixed motor part acts on the damping body.
Claim 6
Dependent Claim
21 words
A motor according to claim 1 in which the damping body is mainly located in the recess of a bell-shaped rotor.
Claim 7
Dependent Claim
28 words
A motor according to claims 4 or 5 in which a wire spring is retained in the damping body and displaceably and punctiformly supported on a fixed part.
Claim 8
Dependent Claim
24 words
A motor according to claim 6, in which the wire spring is supported on the inside surface of a coil former of the motor.
Claim 9
Dependent Claim
20 words
A motor according to claim 6, in which the punctiform support is located substantially in the center of the motor.
Claim 10
Dependent Claim
34 words
A motor according to claim 1 in which the damping body has a conical surface on which a wire spring is supported, which wire spring is secured to a fixed part of the motor.
Claim 11
Dependent Claim
22 words
A motor according to claim 1, in which the damping body is formed of plastic material and has an integrally formed spring.
Claim 12
Dependent Claim
20 words
A motor according to claim 10, in which the spring has a crank enclosing the edge of the bell-shaped rotor.
Claim 13
Dependent Claim
20 words
A motor according to claim 1, in which the force is at least equal to the weight of the rotor.
Claim 14
Dependent Claim
31 words
A motor according to claim 12, in which the force is at least equal with the vector sum of the rotor weight and the magnetic radial forces acting on the rotor.
Claim 15
Dependent Claim
69 words
A miniature synchronous motor having a damping body acting on the rotor, comprising a non-rotating damping body mounted for free rotation on the rotor shaft, spring means acting onto said damping body in a direction comprising a radial and an axial component thereby urging said damping body and rotor respectively in a radial and an axial direction for preventing play of the rotor in radial and in axial directions.
Claim 16
Dependent Claim
69 words
A miniature synchronous motor having a damping body acting on the rotor, comprising a non-rotating damping body mounted for free rotation on the rotor shaft, spring means acting onto said damping body in a direction comprising a radial and an axial component thereby urging said damping body and rotor respectively in a radial and an axial direction for preventing play of the rotor in radial and in axial directions.
References Cited (Backward Citations)
US2307772A
Cited
US3161794A
Cited
US3253170A
Cited
US3453465A
Cited
US3496393A
Cited
US3666057A
Cited
US3816782A
Cited
US3906264A
Cited
US3936680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-21 | 1983-07-23 | 1984-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-21 | 1987-07-23 | 1988-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-21 | 1991-07-23 | 1992-01-22 | $7700.00 | Window Closed / Lapsed |