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:
Oct. 23, 1984
Filed:
Apr. 11, 1983
David D Sheill, Farmington Hills, MI (US);
Rockwell International Corporation, Pittsburgh, PA (US);
Abstract
A slack adjuster is for a disc brake of the type which includes a disc mounted for rotation about an axle and a caliper brake having a housing mounted on the axle in alignment with a friction surface of the disc. A braking piston is mounted in the housing for axial movement toward and away from the friction surface of the disc. Brake actuation produces rotating movement of a powershaft mounted in the housing which will in turn produce a corresponding axial movement of the braking piston through a non-rotating powershaft nut. An adjusting sleeve is between the piston and the powershaft nut and is threadably coupled to the piston and capable of rotation relative thereto to adjust the axial position of the piston. The adjusting sleeve is capable of rotating in a direction which will cause the piston to be adjusted toward the disc and is prevented from rotating in the opposite direction by a one-way clutch element between the adjusting sleeve and the housing. A lost motion element is between the powershaft and the adjusting sleeve and allows rotation of the powershaft to produce corresponding rotation of the adjusting sleeve after the piston has moved toward the disc through a desired running clearance without having made any frictional contact therewith. The lost motion element employs a force limiting clutch element to prevent corresponding rotation of the adjusting sleeve after the piston makes contact with the friction surface of the disc and when the powershaft is rotated in a direction to produce movement of the piston away from the disc.