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:
Dec. 17, 2002
Filed:
May. 17, 2000
John W. Koshak, Barrington Hills, IL (US);
Paul L. Baldwin, Salem, WI (US);
Inventio AG, Hergiswil NW, CH;
Abstract
A brake apparatus engages and locks a piston of a hydraulic elevator drive carrying an elevator car or a cable pulley. The brake apparatus includes a pair of opposed pivotally mounted brake arms each having a curved support carrying a brake lining for engaging the exterior surface of the piston. Each brake lining is formed by bending a planar body at a plurality of the vertical grooves formed in a contact surface to define planar sections. The lining is attached to the support with the sections spaced from the curved support surface. As the brake linings are brought into engagement with the piston surface, the compression forces are evenly distributed by the planar sections functioning as springs.