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. 10, 1992
Filed:
May. 22, 1991
Alistair G Taig, Edwardsburg, MI (US);
Allied-Signal Inc., Morristown, NJ (US);
Abstract
The disc brake (10, 106, 108, 206) with powered integral parking mechanism comprises a twin piston disc brake (106, 108, 206) having a screw member (22, 24; 122, 124; 222, 224) and nut (28, 29; 228, 229) adjuster mechanism. The twin pistons (16, 18; 216, 218) receive service braking hydraulic pressure to effect a service braking application, and also may be displaced mechanically for a parking application by way of the rack (80, 180) and pinion (47, 48; 247, 248) parking mechanism that is operated by hydraulic pressure. The rack (80, 180) and pinion (47, 48; 247, 248) parking mechanism may be located within the caliper housing (20, 220) such that the rack (80) extends between respective drive pinions (47, 48) located about the screw members (22, 24) in order to effect rotation of the screw members (22, 24) in opposite directions, or the rack (280) may extend longitudinally across the same side of both drive pinions (247, 248) to effect rotation of the drive pinions ( 247, 148) and associated screw members (222, 224) in the same direction of rotation. The drive pinions (47, 48; 247, 248) have ratchet teeth (49) which engage corresponding ratchet teeth (39) on screw member flanges (32, 34) such that during release the height (B) of a flange ratchet tooth (39) determines the running clearance of the disc brake pads.