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:
May. 31, 1988
Filed:
Aug. 27, 1987
Rainer Kempken, Erkrath, DE;
Paul Forkardt GmbH & Co. KG, Dusseldorf, DE;
Abstract
An electromechanical apparatus for producing an axial force for the actuation of a clamping device, such as a chuck that rotates with the arbor of a machining tool. The apparatus includes an electric motor that has a stator and a rotor, with the relative movement between the rotor and stator being transferable, via a gear system and a shaft drive as an axial movement, to a tie rod which is preferably hollow. In order to have a small overall size, and to reduce the frictional forces that occur during actuation, the rotor is connected with a gear wheel in which meshes at least one pinion that is secured to a shaft that is mounted in a housing in such a way that it cannot shift axially. Disposed on the shaft is a nut that in turn is connected to the tie rod, which is axially movably mounted in the housing.