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:
Apr. 24, 1984
Filed:
Feb. 09, 1981
Holmer Dangschat, Traunreut, DE;
Dr. Johannes Heidenhain GmbH, Traunreut, DE;
Abstract
A play-free precision drive apparatus is disclosed which comprises a rotatable drive element (2, 20) for driving a driven element (8, 21), a biasing element (12, 26) for urging the driven element (8, 21) into engagement with the drive element (2, 20), and two rotatable support elements (11, 22) abutting the drive element (2, 20) along its periphery for holding the drive element (2, 20) against the driven element (8, 21). The support elements (11, 22) are positioned such that the centers of the support elements (11, 22) and the center of the drive element (2, 20) define an angle (A.sub.1, A.sub.21) of less than 180.degree. having its apex at the center of the drive element (2, 20) and such that the centers of the support elements (11, 22) define a line (L.sub.3, L.sub.23) parallel to a tangent to the drive element (2, 20) which passes through a contact point between the drive element (2, 20) and the driven element (8, 21). Although the drive element (2, 20) and the support elements (11, 22) are mounted on standard bearings which have play, the precision drive apparatus has substantially no play in the direction of drive.