Brake apparatus and plural and independent actuators therefor
AssigneeAisin Seiki Kabushiki Kaisha
InventorTatsumi Torii
Life of this patent
Estimating the term…
Abstract
A brake apparatus for motor vehicles consisting of a brake drum and a pair of brake shoes expandable to be moved into frictional engagement with said drum, and a service brake mechanism comprising a wheel cylinder enclosing at least one piston and arranged between the upper end of said brake shoes. A parking or mechanical brake mechanism comprising a lever and link mechanism is arranged between the lower ends of said brake shoes. Said mechanical brake mechanism is connected with said service brake mechanism preferably by means of a linkage in such a manner that the service brake mechanism and the parking brake mechanism may be independently actuated as well as simultaneously actuated.
Claims11
A brake apparatus for motor vehicles comprising a rotatable brake drum having a friction surface, a stationary backing plate, a pair of brake shoes mounted on said backing plate and arranged adjacent said friction surface of said brake drum, an actuating means positioned between only a first opposed ends of each of said brake shoes for selectively moving said first ends into contact with said friction surface, and mechanical expanding means for selectively moving the other opposed ends of said brake shoes and said first opposed ends of said brake shoes into contact with said friction surface and maintaining said contact, by all four of said ends of said shoes, said mechanical expanding means comprising a link and toggle means for expanding said other opposed ends and for simultaneously expanding said first opposed ends, the braking caused by said mechanical expanding means being stronger than the braking caused by said actuating means.
Dependencies are inferred from the claim text.