# US 10,871,197 B2 · Brake pad retraction device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,871,197 B2 - Document ID: US10871197B2 - Status: Granted - Kind: B2 - Application number: 16/101,886 - Filed: 2018-08-13 - Published: 2019-04-18 - Granted: 2020-12-22 - Earliest claimed: 2017-10-13 - Assignees: Akebono Brake Industry Co., Ltd. - Applicants: Akebono Brake Industry Co., Ltd - Inventors: Kirby Wilson; Varun Nathani - Web page: https://patentgrep.com/patent/US10871197B2 ## CPC - F16D 65/0972: {transmitting brake reaction force, e.g. elements interposed between torque support plate and pad} - F16D 55/22: by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads - F16D 55/227: by two {or more} pins - F16D 65/0068: {Brake calipers} - F16D 65/0975: {Springs made from wire} - F16D 2055/0029: {Retraction devices} - F16D 2055/007: {Pins holding the braking members} - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES ## Abstract A brake assembly comprising: (a) a caliper; (b) two or more brake pads; (c) one or more pins connecting each the two or more brake pads to the caliper; (d) a retraction device connected to one or more of the one or more pins, the retraction devices including: (i) a lock that connects to an end of the pin opposite a caliper; and (ii) a bias device located between the lock and one of the two or more brake pads; wherein during a brake apply each of the two or more brake pads are moved towards the respective retraction device compressing the bias device between the lock and one of the two or more brake pad so that upon release of the brake apply the retraction device applies a retraction force to the one of the two or more brake pads. ## Claims ### Claim 1 A brake assembly comprising: a. a caliper; b. a brake pad; c. a pin connecting the brake pad to the caliper; d. a retraction device connected to the pin, the retraction devices including: i. an abutment; and ii. a bias device located between the abutment and the brake pad; wherein the abutment retains the bias device on the pin, and wherein during a brake apply, the brake pad is moved towards the retraction device compressing the bias device between the abutment and the brake pad, and upon release of the brake apply the retraction device applies a retraction force on to the brake pad. ### Claim 2 (depends on 1) The brake assembly of claim 1, wherein the bias device is entirely located on a first side of the brake pad. ### Claim 3 (depends on 1) The brake assembly of claim 1, wherein the bias device is a spring. ### Claim 4 (depends on 1) The brake assembly of claim 1, wherein the bias device is a grommet or a bushing. ### Claim 5 (depends on 1) The brake assembly of claim 1, wherein the bias device is free of any loops or arms that extend from a first side of the brake pad to a second side of the brake pad. ### Claim 6 (depends on 1) The brake assembly of claim 1, wherein the bias device axially moves the brake pad along an axis of the bias device, the pin, or both. ### Claim 7 (depends on 1) The brake assembly of claim 1, wherein the bias device and the pin are co-axial. ### Claim 8 (depends on 1) The brake assembly of claim 1, wherein the bias device is a conical spring. ### Claim 9 (depends on 1) The brake assembly of claim 1, wherein the abutment is press fit onto the pin. ### Claim 10 (depends on 9) The brake assembly of claim 9, wherein the pin includes a retention feature that retains the abutment on the pin. ### Claim 11 (depends on 9) The brake assembly of claim 9, wherein the abutment includes one or more steps. ### Claim 12 (depends on 9) The brake assembly of claim 9, wherein the abutment is a lock that includes a lock adjuster that allows the lock to be adjusted after being press fit onto the pin. ### Claim 13 (depends on 1) The brake assembly of claim 1, wherein the retraction device is located in a leading end, a trailing end, or both of the brake assembly. ### Claim 14 (depends on 1) The brake assembly according to claim 1, wherein the brake pad comprises a friction material and a pressure plate, the bias device is located on a same side of the pressure plate as the friction material. ### Claim 15 A brake assembly comprising: a brake caliper; a brake pad having a pressure plate and a friction material; a pin having a first section that engages the brake caliper, and a second section that engages the brake pad; and a bias device engaging the pin and a surface of the pressure plate that opposes the fiction material; wherein the bias device biases the brake pad in a direction away from a brake rotor during release of a brake apply. ### Claim 16 (depends on 15) The brake assembly according to claim 15, wherein the bias device is a spring. ### Claim 17 (depends on 15) The brake assembly according to claim 15, wherein the bias device is a bushing or grommet. ### Claim 18 (depends on 17) The brake assembly according to claim 17, wherein the bias device comprises one or more mounts that engage one or more mounts on the pressure plate. ### Claim 19 (depends on 15) The brake assembly according to claim 15, wherein the first section of the pin engages an aperture defined in the brake caliper, and the second section of the pin engages an aperture in the brake pad. ### Claim 20 (depends on 15) The brake assembly of claim 15, wherein the bias device and the pin are co-axial.