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US 4,688,951 AGranted
Roller bearing with contactless transmission of electric signals
AssigneeS.N.R. Roulements
InventorRoger Guers
Life of this patent
Estimating the term…
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.
Claims6
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.
5 more elements
Dependencies are inferred from the claim text.