# US 11,028,889 B2 · Self-energizing brake caliper

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- Number: US 11,028,889 B2
- Document ID: US11028889B2
- Status: Granted
- Kind: B2
- Application number: 16/592,002
- Filed: 2019-10-03
- Published: 2020-04-23
- Granted: 2021-06-08
- Earliest claimed: 2018-10-22
- Assignees: Kwangjin Michael Lee; Kyung Chang Industrial Co., Ltd.
- Applicants: Kyung Chang Industrial Co., Ltd.; Kwangjin Michael Lee
- Inventors: Kwangjin Michael Lee
- Web page: https://patentgrep.com/patent/US11028889B2

## CPC

- F16D 55/2245: {in which the common actuating member acts on two levers carrying the braking members, e.g. tong-type brakes (similar brakes for rail vehicles B61H5/00)}
- F16D 55/2255: in which the common actuating member is pivoted
- B60T 1/065: {employing disc (B60T1/062 takes precedence)}
- F16D 65/0056: {Brake supports}
- F16D 65/0075: {assembled from a plurality of parts}
- F16D 65/095: Pivots or supporting members therefor
- F16D 65/18: adapted for drawing members together {, e.g. for disc brakes}
- F16D 2055/0008: {Brake supports}
- F16D 2055/002: {assembled from a plurality of parts}
- F16D 2121/04: acting on a piston-type actuator, e.g. for liquid pressure
- F16D 2121/24: using motors
- F16D 2125/60: Cables or chains, e.g. Bowden cables
- F16D 2125/64: Levers
- F16D 2125/68: Lever-link mechanisms, e.g. toggles with change of force ratio
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- B60T: VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL (electrodynamic brake systems for vehicle, in general B60L; brakes per se, i.e. devices where braking effect occurs, including ultimate brake actuators, F16D); ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES

## Abstract

According to the present disclosure, there is provided a self-energizing brake caliper which comprises a caliper bracket fixed to a vehicle frame and comprising a rotation axis extending in the height direction of the vehicle; a first caliper arm rotatably connected to the rotation axis; a second caliper arm rotatably connected to the rotation axis and crossing the first caliper arm; an inboard brake pad; and an outboard brake pad. The first caliper arm is slidably connected at a first end of the inboard brake pad in the inboard side of the brake disc and the outer end of the first caliper arm is connected to a second end of the outboard brake pad. The second caliper arm is connected to the second end of the inboard brake pad in the inboard side of the brake disc and the outer end of the second caliper arm is slidably connected to the first end of the outboard brake pad. The driving force of an actuator is transferred to the inner ends of the first caliper arm and the second caliper arm.

## Claims

### Claim 1

A self-energizing brake caliper comprising:
a caliper bracket fixed to a vehicle frame and comprising a rotation axis extending in the height direction of the vehicle;
a first caliper arm rotatably connected to the rotation axis;
a second caliper arm rotatably connected to the rotation axis and crossing the first caliper arm;
an inboard brake pad; and
an outboard brake pad;
wherein the first caliper arm is slidably connected at a first end of the inboard brake pad in the inboard side of the brake disc and the outer end of the first caliper arm is connected to a second end of the outboard brake pad;
wherein the second caliper arm is connected to the second end of the inboard brake pad in the inboard side of the brake disc and the outer end of the second caliper arm is slidably connected to the first end of the outboard brake pad; and
wherein the driving force of an actuator is transferred to the inner ends of the first caliper arm and the second caliper arm.

### Claim 2 (depends on 1)

The self-energizing brake caliper according to claim 1, wherein the first caliper arm is provided in the upper side of the second caliper arm.

### Claim 3 (depends on 1)

The self-energizing brake caliper according to claim 1, further comprising a first guide member and a second guide member,
wherein the first caliper arm comprises a first mounting hole; the second caliper arm comprises a second mounting hole; the first end of the inboard brake pad comprises a first slot; and the first end of the outboard brake pad comprises a second slot;
wherein the first guide member passes through the first mounting hole and the first slot; the second guide member passes through the second mounting hole and the second slot; and
wherein the first guide member and the second guide member slide along the first slot and the second slot, respectively.

### Claim 4 (depends on 2)

The self-energizing brake caliper according to claim 2, further comprising a first guide member and a second guide member,
wherein the first caliper arm comprises a first mounting hole; the second caliper arm comprises a second mounting hole; the first end of the inboard brake pad comprises a first slot; and the first end of the outboard brake pad comprises a second slot;
wherein the first guide member passes through the first mounting hole and the first slot; the second guide member passes through the second mounting hole and the second slot; and
wherein the first guide member and the second guide member slide along the first slot and the second slot, respectively.

### Claim 5 (depends on 3)

The self-energizing brake caliper according to claim 3, wherein the first slot is provided at both of the upper side and the lower side of the inboard brake pad; and the second slot is provided at both of the upper side and the lower side of the outboard brake pad.

### Claim 6 (depends on 4)

The self-energizing brake caliper according to claim 4, wherein the first slot is provided at both of the upper side and the lower side of the inboard brake pad; and the second slot is provided at both of the upper side and the lower side of the outboard brake pad.

### Claim 7 (depends on 1)

The self-energizing brake caliper according to claim 1, wherein the inner end of the first caliper arm and the inner end of the second caliper arm move away from each other by the driving force in braking operation.

### Claim 8 (depends on 2)

The self-energizing brake caliper according to claim 2, wherein the inner end of the first caliper arm and the inner end of the second caliper arm move away from each other by the driving force in braking operation.

### Claim 9 (depends on 1)

The self-energizing brake caliper according to claim 1, wherein the caliper bracket comprises a mounting surface and a through-hole formed closely to the mounting surface; the first caliper arm is connected to the caliper bracket in the upper side of the mounting surface; and the second caliper arm passes through the through-hole in the lower side of the mounting surface to be connected to the caliper bracket.

### Claim 10 (depends on 2)

The self-energizing brake caliper according to claim 2, wherein the caliper bracket comprises a mounting surface and a through-hole formed closely to the mounting surface; the first caliper arm is connected to the caliper bracket in the upper side of the mounting surface; and the second caliper arm passes through the through-hole in the lower side of the mounting surface to be connected to the caliper bracket.

### Claim 11 (depends on 1)

The self-energizing brake caliper according to claim 1, wherein a first distance between the rotation axis and the point where the driving force acts is longer than a second distance between the rotation axis and the outer end of the first caliper arm; the first distance is the distance along the rotation axis of the brake disc; and the second distance is the distance along the longitudinal direction of the brake pads.

### Claim 12 (depends on 2)

The self-energizing brake caliper according to claim 2, wherein a first distance between the rotation axis and the point where the driving force acts is longer than a second distance between the rotation axis and the outer end of the first caliper arm; the first distance is the distance along the rotation axis of the brake disc; and the second distance is the distance along the longitudinal direction of the brake pads.