The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 08, 1995
Filed:
Mar. 17, 1994
Heimbert-Ulrich Irmer, Haar, DE;
Bruno Scheckel, Ebersberg, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
An apparatus for contactless data and energy transmission includes a stationary part and a movable part. The stationary part includes coils and an oscillator connected to the coils for contactless power transmission and data transmission to the movable part. The oscillator produces a reference oscillation as well as an information oscillation upon which a phase displacement relative to the reference oscillation is imposed as a function of data to be transmitted. The movable part includes other coils. One of the coils of each of the parts forms a first pair of coils through which the phase-displaced oscillation is supplied and another of the coils of each of the parts forms a second pair of coils through which the reference oscillation is supplied to the movable part. The movable part also includes a demodulator circuit connected to the other coils for receiving transmitted oscillations and recovering the data from the phase displacement. According to one embodiment, only one of the pairs of coils provide power transmission, and data transmission from the movable part to the stationary part is provided by load variation only at the coil of the movable part not being used for power transmission. According to another embodiment, data transmission from the movable part to the stationary part is provided by load variation of only one of the pairs of coils, and power transmission is only provided by the pair of coils not undergoing any load variation caused by the data transmission from the movable part to the stationary part at a given moment.