Disk brake

• US 6,257,379 B1
• Filed: 07/20/1999
• Issued: 07/10/2001
• Est. Priority Date: 12/27/1996
• Status: Expired due to Fees

• Current Assignee: Sumitomo Electric Industries Limited (Sumitomo Corporation)
• Original Assignee: Sumitomo Electric Industries Limited (Sumitomo Corporation)
• Inventors: Matsumoto, Atsuo, Matsuzaki, Yoshiki
• Primary Examiner(s): Oberleitner, Robert J.
• Assistant Examiner(s): RODRIGUEZ, PAMELA
• Application Number:
  US09/358,263
• Time in Patent Office: 721 Days
• Field of Search: 188/72.3, 188/73.31, 188/73.32, 188/73.35, 188/73.36, 188/73.37, 188/73.38, 188/73.44, 188/73.45, 188/250.E, 188/250.B, 188/250.D, 192/30.V
• US Class Current: 188/73.31
• CPC Class Codes: F16D 2055/0091 Plural actuators arranged side by side on the same side of the rotor
• CPC Class Codes: F16D 55/225 the braking members being brake pads
• CPC Class Codes: F16D 65/0006 Noise or vibration control
• CPC Class Codes: F16D 65/0971 transmitting brake actuation force, e.g. elements interposed between brake piston and pad
• CPC Class Codes: F16D 65/0979 acting on the rear side of the pad or an element affixed thereto, e.g. spring clips securing the pad to the brake piston or caliper
• CPC Class Codes: F16D 65/183 with force-transmitting members arranged side by side acting on a spot type force-applying member

Abstract

An open-topped disc brake comprises a disk and friction pads provided on opposite sides of the disk and having back plates. A caliper having a window and fluid pressure cylinders are provided together with pad pins extending across the window for supporting the friction pads. Pistons slidably received in the fluid pressure cylinders urge the friction pads against the disk. First and second shims are disposed between the friction pads. The first shims are provided near the friction pads with first claws provided on the first shims which resiliently embrace the back plates of the pads by straddling outer and inner edges of the back plates. Second shims are provided near the pistons with third claws provided on the second shims to detachably and resiliently engage the pistons. Second claws are provided on one of the first shims and the second shims for resiliently gripping the other of the first shims and the second shims so that the first and second shims are moved together.

Claims

1. An open-topped disk brake comprising a disk, friction pads having back plates, a caliper and fluid pressure cylinders, pad pins that support said friction pads, pistons slidably received in said fluid pressure cylinders for urging said friction pads against said disk, first and second shims disposed between said friction pads, said first shims being provided near said friction pads, first claws provided on said first shims and resiliently embracing said back plates of said pads by straddling outer and inner edges of said back plates with respect to the radial direction of the disk, said second shims being provided near said pistons, third claws provided on said second shims and detachably and resiliently engaging said pistons, second claws provided on one of said first shims and said second shims for resiliently gripping the other of said first shims and said second shims so that said first and second shims are moved together.

2. A disk brake according to claim 1, further comprising retractor means for retracting said pistons when fluid pressure is released.

3. A disk brake according to claim 2, wherein said retractor means is a piston seal.

4. An open-topped disk brake comprising a disk, friction pads having back plates, a caliper and fluid pressure cylinders, pad pins that support said friction pads, pistons slidably received in said fluid pressure cylinders for urging said friction pads against said disk, a retractor for retracting said pistons when fluid pressure is released, first and second shims disposed between said friction pads, said first shims being provided near said friction pads, first claws provided on said first shims and resiliently embracing said back plates of said pads by straddling outer and inner edges of said back plates with respect to the radial direction of the disk, said second shims being provided near said pistons, third claws provided on said second shims and detachably and resiliently engaging said pistons, second claws provided on one of said first shims and said second shims for resiliently gripping the other of said first shims and said second shims so that said first and second shims are moved together.

5. An open-topped disk brake comprising a disk, friction pads having back plates, a caliper and fluid pressure cylinders, pad pins that support said friction pads, pistons slidably received in said fluid pressure cylinders for urging said friction pads against said disk, retractor mechanism for retracting said pistons when fluid pressure is released, first and second shims disposed between said friction pads, said first shims being provided near said friction pads, first claws provided on said first shims and resiliently embracing said back plates of said pads by straddling outer and inner edges of said back plates with respect to the radial direction of the disk, said second shims being provided near said pistons, third claws provided on said second shims and detachably and resiliently engaging said pistons, second claws provided on one of said first shims and said second shims for resiliently gripping the other of said first shims and said second shims so that said first and second shims are moved together.