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. 19, 1998
Filed:
Dec. 03, 1996
Alfons Steidle, Spaichingen, DE;
Alois Schaeffeler, Spaichingen, DE;
Marquardt GmbH, Rietheim-Weilheim, DE;
Abstract
An apparatus for adjusting carbon brushes of a reversible electric motor includes: a swivelable support; a fixed position contact plate disposed adjacent the support; a plurality of fixed contacts received in the contact plate and adapted to be electrically connected to field windings of the electric motor; and a plurality of brush holders arranged on the support for holding the carbon brushes, each of the brush holders having a facing surface which faces the contact plate. Each of the brush holders further includes a projecting portion projecting approximately perpendicularly from the facing surface in the axial direction into a region of the fixed contacts, projecting portions of the brush holders thereby forming switching contacts for making direct contact with the fixed contacts such that the fixed contacts are adapted to be in alternate contact with the carbon brushes for reversing a direction of rotation of the electric motor when the support is swiveled. Each of the fixed contacts has a contact surface extending approximately parallel to a corresponding switching contact in the axial direction, the contact surface further having elasticity the radial direction such that the corresponding switching contact is directly urged against the contact surface in the radial direction for establishing direct electrical contact between the fixed contacts and the brush holders.