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:
Apr. 05, 1977
Filed:
Oct. 30, 1975
John D Danko, Canton, OH (US);
Richard C St John, North Canton, OH (US);
Aspro, Inc., Canton, OH (US);
Abstract
A vehicle brake having a pair of brake shoes moveably mounted and arranged in end-to-end relationship on a fixed backing plate. A pair of levers is pivotally mounted on the backing plate. The levers have thrust transmitting portions which are interposed between a pair of opposed brake shoe ends and a hydraulic service brake actuator for moving the brake shoes into engagement with the brake drum. The levers also have swinging end portions which pivot inwardly in opposite directions upon outward movement of the thrust transmitting portions. The lever thrust portions have concavely curved camming surfaces which slidably engage complementary convexly curved brake shoe end surface for transmitting the hydraulic actuator force to the brake shoes. A mechanically actuated parking brake mechanism is mounted on the backing plate and is operatively connected to the lever swing end portions by a pair of links. One end of each link is operatively connected by a pin within a slotted end of an actuating handle, with the other link ends being slotted and moveably connected to the lever swinging end portions. Actuation of the handle by a parking brake actuating force pivots the lever swinging end portions inwardly through the connecting links which in turn expand the brake shoes outwardly into engagement with the drum through the resulting outward movement of the lever thrust portions.