US4688951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roller bearing with contactless transmission of electric signals
Assignee: Timken US LLC
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Filing: 1986-10-01
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Granted: 1987-08-25
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Expires: 2006-10-01
Abstract
Abstract Two parts of a roller bearing are separated by a gap and rotate in relation to one another, one of which carries a circuit through which a current passes. The circuit is rigidly connected to the rotating ring of the roller bearing and moves in front of a disk carried by the stationary ring on which an electromagnetic field probe is mounted.
Inventors
- 👤 Roger Guers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:02
CPC Classifications
F; F16; F16C; F16C41/00; F16C41/008; F16C33/00; F16C33/72; F16C33/76; F16C33/78; F16C41/004; F16C41/007; G; G01; G01D; G01D21/00; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/443; G08; G08C; G08C17/00; G08C17/04; F16C19/00; F16C19/02; F16C19/04; F16C19/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
171 words
A rolling bearing with contactless transmission of electric signals, comprising: a first rolling bearing ring; a second rolling bearing ring rotatable relative to said first ring; means fixed to said second ring for creating a magnetic field in response to the application of an electric current thereto; means for detecting a magnetic field fixed to said first ring at a position such that said means for detecting moves through a magnetic field created by said means for creating a magnetic field upon relative rotation of said first and second rings; at least one magnet fixed to said first ring; at least one electric coil fixed to said second ring at a position such that electric coil moves through a magnetic field of said magnet upon relative rotation of said first and second rings, whereby an electric current is produced; and means dependent on said produced electric current for regulating said means for creating a magnetic field, whereby said means for detecting a magnetic field is responsive to said means for regulating.
Claim 2
Dependent Claim
171 words
A rolling bearing with contactless transmission of electric signals, comprising: a first rolling bearing ring; a second rolling bearing ring rotatable relative to said first ring; means fixed to said second ring for creating a magnetic field in response to the application of an electric current thereto; means for detecting a magnetic field fixed to said first ring at a position such that said means for detecting moves through a magnetic field created by said means for creating a magnetic field upon relative rotation of said first and second rings; at least one magnet fixed to said first ring; at least one electric coil fixed to said second ring at a position such that electric coil moves through a magnetic field of said magnet upon relative rotation of said first and second rings, whereby an electric current is produced; and means dependent on said produced electric current for regulating said means for creating a magnetic field, whereby said means for detecting a magnetic field is responsive to said means for regulating.
Claim 3
Dependent Claim
41 words
The rolling bearing of claim 1, wherein said means for regulating comprise sensor means having an amplifier fed by said produced electric current and means for supplying an amplified signal from said amplifier to said means for creating a magnetic field.
Claim 4
Dependent Claim
39 words
The rolling bearing of claim 1, wherein said means for regulating comprise means including an all or nothing switch for supplying said produced current to said means for creating a magnetic field, and sensor means for controlling said switch.
Claim 5
Dependent Claim
46 words
The rolling bearing of claim 1, wherein said means for creating a magnetic field and said means for detecting a magnetic field comprise a pair conductive paths respectively connected to said second and first rings and separated by a gap, whereby a capacitive system is formed.
Claim 6
Dependent Claim
43 words
The rolling bearing of claim 1, wherein said means for creating a magentic field and said means for detecting a magnetic field comprises at least one conductive coil fixed to each of said first and second rings to form an inductive transmission system.
Claim 7
Dependent Claim
18 words
The rolling bearing of claim 5, wherein said at least one conductive coil comprises a single conductive coil.
References Cited (Backward Citations)
US3573520A
Cited
US4069435A
Cited
US4063786A
Cited
US4446391A
Cited
FR2558223A1
Cited
FR2574501A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-24 | 1991-02-23 | 1991-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-24 | 1995-02-23 | 1995-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-24 | 1999-02-23 | 1999-08-25 | $7700.00 | Window Closed / Lapsed |