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:
Oct. 30, 1984
Filed:
Jun. 14, 1983
Heinz Marschner, Kressbronna, DE;
Fritz Heinemann, Friedrichshafen, DE;
George Marsland, Kressbronn, DE;
Zahnradfabrik Friedrichshafen Aktiengesellschaft, Friedrichshafen, DE;
Abstract
One embodiment of a harmonic-drive device insertable, e.g., into a clutch housing having elevated fluid pressures comprises a cup-shaped member with a flexible cylindrical inserted in a casing and rigidly connected thereto, the cup member bearing at its end a pair of substantially cylindrical supports in which a drive shaft is rotatably journaled. The shaft bears a mechanical wave generator which deforms the middle portion of the cup wall into an elliptical cross-section, whereby splines on opposite sides of the cup wall are shifted to mesh with inwardly projecting teeth of a pair of rings, one ring having teeth greater in number than the splines and being attached to a motion-output component rotatably and slidably secured to the cup casing. The supports in the cup are tapered to a minimum diameter at their inner ends substantially equal to the minor axis of the elliptical cross-section. In another embodiment of the device, the wave generator and the supports are formed as an enlargement of the drive shaft provided on an outer surface with ribs or sealing stripes subdividing the surface of the enlargement into a matrix of compartments. The cross-section of the shaft enlargement varies from circular at the ends to elliptical in the center and the compartments are connected to a hydraulic circuit for being pressurized by a lubricating fluid.