Single piston-cylinder duo-servo drum brake
AssigneeAkebono Brake Industry Co., Ltd.
InventorRyuichi Iwasaki
Life of this patent
Estimating the term…
Abstract
In a drum brake, a wheel cylinder is located between a pair of adjacent shoe ends for a pair of brake shoes and a piston inserted into the wheel cylinder is slidably engaged through an anchor provided on a backing plate and further the piston is provided with a flange on the side thereof pressing a brake shoe so that the anchor is interposed between the flange of the piston and the wheel cylinder, and, furthermore, a strut is located between the other pair of adjacent shoe ends for the pair of the brake shoes in order to lighten a weight of the brake and facilitate a disassembly and assembly of the brake.
Claims2
A duo-servo drum brake comprising:
- a pair of brake shoes housed in and engaging a brake drum, each shoe having ends, said pair being arranged defining first adjacent ends and second adjacent ends,
- an immovable anchor member disposed between said first adjacent ends,
- a piston slidably engaged through said anchor member to push one of said first adjacent ends in a first brake engaging direction, movement of said piston in a direction opposite to the first brake engaging direction being limited by abutment of said piston with said anchor member,
- a cylinder member slidably receiving said piston and defining therewith a chamber to receive brake fluid, said cylinder member being arranged to push the other of said first adjacent ends in a second brake engaging direction, movement of said cylinder member, in a direction opposite to the second brake engaging direction being limited by abutment of said cylinder member with said anchor member,
- a strut member connecting said second adjacent ends to each other, and
- means for supplying brake fluid under pressure to said chamber to create a braking force,
- whereby said braking force is received by said anchor member because of an abutment of said piston or said cylinder member with said anchor member.
Dependencies are inferred from the claim text.