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:
Nov. 29, 1994
Filed:
Nov. 13, 1992
Ismo Kuivamaki, Vantaa, FI;
Kone Oy, Helsinki, FI;
Abstract
An electromagnetic brake is disclosed comprising a brake wheel, at least one friction surface attached to a respective friction plate and urged into frictional engagement with the brake wheel during braking. An electromagnet and an anchor serve to disengage the friction surface from the brake wheel when a current is supplied to the electromagnet. To compensate for the wear of the friction surface, the anchor is adapted to rotate in adjustment threads and thereby advance towards the magnet. Rotation of the anchor is caused by a coil spring. To maintain an essentially constant clearance between the electromagnet and the anchor when the brake is in the close state, the brake is provided with spring-loaded lugs mounted on a face of the anchor and protruding to predetermined distance towards the electromagnet. The spring-loaded lugs are adapted to limit the movement of the anchor towards the electromagnet when the brake is closed, and are compressed to allow the brake to be disengaged when power is supplied to the electromagnet.