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:
Jul. 07, 1981
Filed:
Nov. 16, 1978
David T Ayers, Birmingham, MI (US);
Kelsey-Hayes Company, Romulus, MI (US);
Abstract
A generally self-contained automatic adjusting strut having many uses including that of an automatic adjuster for the shoes of a friction brake. The unit comprises a carrier having a threaded strut expansible outwardly therefrom by means of a star wheel. The star wheel is periodically rotated to compensate for wear adjustment by an adjusting lever pivoted to the carrier and containing an actuating tang that extends between two abutments on the carrier which limit the rotation of the adjusting lever to a prescribed amount, as for example, 11/2 teeth of the star wheel. The actuating tang also projects through an opening in the adjacent brake shoe, which is spaced from an abutment edge of the shoe by a prescribed distance (for example 0.040 inches) less than a companion pair of abutments on the carrier, and one of which is the return stop for the actuating tang. The unit includes a combination torsion and compression spring for holding the actuating tang against one of the companion abutments of the carrier, and a second spring is provided for biasing the carrier towards the opposite shoe. The second spring, therefore, assures that the previously described clearance is maintained between the actuating tang and the adjacent shoe.