Patent US5300849A successfully refreshed from Google Patents.
US5300849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for eliminating the axial and radial play of an axle
Assignee: Deutsche Thomson Brandt GmbH
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Filing: 1992-08-11
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Granted: 1994-04-05
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Expires: 2012-08-11
Abstract
Abstract A device for eliminating the radial and axial play of a shaft having a circular ferromagnetic plate mounted thereon and which passes through a ferromagnetic stationary fitting. The device also includes a permanent magnet for establishing attractive forces within the device. A ferromagnetic arcuate part has a radius of curvature slightly larger than the radius of curvature of the circular ferromagnetic plate. The arcuate part is arranged in the proximity of the edge of the circular ferromagnetic plate whereby a first magnetic force acts between the arcuate part and the edge of the plate to eliminate the radial play and a second magnetic force acts between the shaft and the plate to eliminate the axial play.
Inventors
- 👤 Axel Elsasser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:59
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/20; G11B19/2009
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
120 words
In a device for eliminating the radial and axial play of a shaft having a circular ferromagnetic plate mounted thereon and which passes through a ferromagnetic stationary fitting, said device also having a permanent magnet for establishing attractive forces in said device an improvement comprising: a ferromagnetic arcuate part having a radius of curvature slightly larger than the radius of curvature of said circular ferromagnetic plate, said arcuate part being arranged in the proximity of the edge of said circular ferromagnetic plate whereby a first magnetic force acts between said arcuate part and the edge of said plate to eliminate said radial play and a second magnetic force acts between said shaft and said plate to eliminate said axial play.
Claim 2
Dependent Claim
120 words
In a device for eliminating the radial and axial play of a shaft having a circular ferromagnetic plate mounted thereon and which passes through a ferromagnetic stationary fitting, said device also having a permanent magnet for establishing attractive forces in said device an improvement comprising: a ferromagnetic arcuate part having a radius of curvature slightly larger than the radius of curvature of said circular ferromagnetic plate, said arcuate part being arranged in the proximity of the edge of said circular ferromagnetic plate whereby a first magnetic force acts between said arcuate part and the edge of said plate to eliminate said radial play and a second magnetic force acts between said shaft and said plate to eliminate said axial play.
Claim 3
Dependent Claim
40 words
The improvement of claim 1 wherein said permanent magnet is a ring magnet and wherein said stationary fitting is a flange arranged coaxial with said shaft for supporting said magnet and wherein said arcuate part is integral with said flange.
Claim 4
Dependent Claim
109 words
In a device for eliminating the radial and axial play of a shaft having a first ferromagnetic plate mounted thereon, An improvement comprising: a permanent magnet arranged coaxial with said shaft, a second ferromagnetic plate having an aperature for receiving said shaft, said second plate including an arcuate part having a radius of curvature slightly larger than the radius of curvature of said permanent magnet and arranged in the proximity of said magnet whereby a first magnetic force acts between said arcuate part and said magnet to eliminate said radial play and a second magnetic force acts between said magnet and said first plate to eliminate said axial play.
Claim 5
Dependent Claim
109 words
In a device for eliminating the radial and axial play of a shaft having a first ferromagnetic plate mounted thereon, An improvement comprising: a permanent magnet arranged coaxial with said shaft, a second ferromagnetic plate having an aperature for receiving said shaft, said second plate including an arcuate part having a radius of curvature slightly larger than the radius of curvature of said permanent magnet and arranged in the proximity of said magnet whereby a first magnetic force acts between said arcuate part and said magnet to eliminate said radial play and a second magnetic force acts between said magnet and said first plate to eliminate said axial play.
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) | 1997-04-04 | 1997-10-04 | 1998-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-04 | 2001-10-04 | 2002-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-04 | 2005-10-04 | 2006-04-05 | $7700.00 | Window Closed / Lapsed |