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US 6,308,807 B1Granted
Disk brake
AssigneeSumitomo Electric Industrial, Ltd.
InventorsAtsuo Matsumoto, Yoshiki Matsuzaki
Life of this patent
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AssigneeSumitomo Electric Industrial, Ltd.
InventorsAtsuo Matsumoto, Yoshiki Matsuzaki
Estimating the term…
A disk brake having members for keeping the friction pads in contact with the disk rotor in such a way that the wear of the friction members and the energy loss are kept to a minimum. The disk brake has a disk rotor, friction pads provided opposed to each other on both sides of the disk rotor, a caliper formed with a fluid pressure cylinder at least on one side of the disk rotor, and a piston slidably received in the cylinder for selectively applying braking force to the disk rotor by pushing the friction pads into sliding contact with the disk rotor. A resilient member is disposed between the piston and one of the friction pads provided opposite the piston for biasing the friction pads toward the disk rotor by a predetermined stroke, thereby keeping the friction pads in contact with the disk rotor at a predetermined surface pressure even while the brake is not applied.
A disk brake comprising a disk rotor, friction pads provided opposed to each other on both sides of said disk rotor and having a back plate, a caliper formed with a fluid pressure cylinder on at least one side of said disk rotor, a piston slidably received in said cylinder for applying braking force to said disk rotor by pushing said friction pads into frictional contact with said disk rotor, a piston retractor that retracts said piston when fluid pressure applied to said piston is released, and a resilient member disposed between said piston and said friction pads for biasing said friction pads toward said disk rotor by a predetermined stroke, thereby keeping said friction pads always in contact with said disk rotor over an entire frictional surface of said friction pads at a predetermined surface pressure even while the brake is not applied, said friction pads comprising substantially the sole source of braking force.
A disk brake comprising a disk rotor, at least one friction pad provided on at least one side of said disk rotor, said at least one friction pad having a back plate, a fluid pressure cylinder, a piston slidably received in said fluid pressure cylinder, said piston applying a braking force to said disk rotor by pushing said at least one friction pad into frictional contact with said disk rotor, and a resilient member positioned between said piston and said at least one friction pad, said resilient member biasing said at least one friction pad toward said disk rotor by a predetermined stroke, thereby keeping said at least one friction pad in contact with said disk rotor at a predetermined surface pressure even while said brake is not applied, a surface area of said disk rotor contacted when said piston pushes said at least one friction pad into frictional contact with said disk rotor and when said piston does-not push at least one said frictional pad into frictional contact with said disk rotor being substantially equal, said at least one friction pad comprising substantially the sole source of braking force.
Dependencies are inferred from the claim text.