Patent US3797331A successfully refreshed from Google Patents.
US3797331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Planetary washing machine drive with centrifugal clutch
Assignee: Danfoss AS
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Filing: 1972-06-02
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Granted: 1974-03-19
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Expires: 1992-06-02
Abstract
Abstract The invention relates to a washing machine drive which comprises a motor and a planetary gear set. In operation the drive is switched from a washing speed to a spinning speed by clutch and brake means having two stages. The clutch means for maintaining the washing speed are associated with centrifugal weights and these brake means do not release until moments after the clutch means for the spinning speed is actuated. The main object is to avoid a mode of operation which involves a sudden pronounced change in the load which has a harmful effect on the machine.
Inventors
- 👤 P Kjeldsteen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:24
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/44; F16H3/46; F16H3/48; F16H3/52; F16H3/54; D; D06; D06F; D06F37/00; D06F37/30; D06F37/36
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
146 words
A washing machine drive comprising a casing, a motor, a planetary gear set having speed changing elements, a drive shaft between said motor and said planetary gear set, a brake disk connected to one of said elements for rotation therewith, selectively operable brake means between said brake disk and said casing, and speed responsive automatically operable clutch means between said brake disk and said drive shaft which maintains a centrifugal force oriented clutching engagement momentarily after a braking engagement is initiated for said selectively operable brake means, said brake disk carrying centrifugal weight means, said automatically operable clutch means being between said centrifugal weight means and said drive shaft, brake parts of said selectively operable brake means and clutch parts of said automatically operable clutch means being on said centrifugal weight means, said brake and clutch parts having the form of radially spaced apart circumferential segments.
Claim 2
Dependent Claim
146 words
A washing machine drive comprising a casing, a motor, a planetary gear set having speed changing elements, a drive shaft between said motor and said planetary gear set, a brake disk connected to one of said elements for rotation therewith, selectively operable brake means between said brake disk and said casing, and speed responsive automatically operable clutch means between said brake disk and said drive shaft which maintains a centrifugal force oriented clutching engagement momentarily after a braking engagement is initiated for said selectively operable brake means, said brake disk carrying centrifugal weight means, said automatically operable clutch means being between said centrifugal weight means and said drive shaft, brake parts of said selectively operable brake means and clutch parts of said automatically operable clutch means being on said centrifugal weight means, said brake and clutch parts having the form of radially spaced apart circumferential segments.
Claim 3
Dependent Claim
92 words
A washing machine drive according to claim 1 including a magnetically operable actuator which is axially movable relative to said casing, a brake portion of said selectively operable brake means being carried by said actuator, actuator spring means for biasing said actuator into clutching engagement with said centrifugal weight means, centrifugal weight spring means between said brake disk and said centrifugal weight means for biasing said centrifugal weight means into effective clutching engagement with said drive shaft, said actuator spring means exerting a larger biasing force than said centrifugal weight spring means.
Claim 4
Dependent Claim
82 words
A washing machine drive according to claim 1 including a magnetically operable actuator which is axially movable relative to said casing, a brake portion of said selectively operable brake means being carried by said actuator, said brake disk being axially movable, third brake means between said brake disk and said casing, said third brake means being operated by an effective biasing engagement between said brake disk and said magnetically operated actuator only subsequently to the disengagement of said automatically operable clutch means.
Claim 5
Dependent Claim
21 words
A washing machine drive according to claim 1 wherein said brake disk is a carrier element for said planetary gear set.
Claim 6
Dependent Claim
44 words
A washing machine drive according to claim 1 wherein said centrifugal weight means are pivotally mounted, said planetary gear set including planetary gear wheels and journals between said gear wheels and said clutch disk, said centrifugal weight means being pivotally mounted on said journals.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |