# US 11,028,922 B2 · Parking lock for a vehicle transmission

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- Number: US 11,028,922 B2
- Document ID: US11028922B2
- Status: Granted
- Kind: B2
- Application number: 16/267,422
- Filed: 2019-02-05
- Published: 2019-08-08
- Granted: 2021-06-08
- Earliest claimed: 2018-02-05
- Assignees: Koki Technik Transmission Systems GmbH
- Applicants: KOKI TECHNIK Transmission Systems GmbH
- Inventors: Bernd Schulze
- Web page: https://patentgrep.com/patent/US11028922B2

## CPC

- F16H 63/3425: {characterised by pawls or wheels}
- B60T 1/005: {by locking of wheel or transmission rotation}
- B60T 1/062: {acting on transmission parts}
- F16D 63/006: {Positive locking brakes}
- F16H: GEARING
- 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
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES

## Abstract

The invention concerns a parking lock of a motor vehicle transmission with a ratchet wheel (1) and a ratchet (2), wherein the ratchet wheel (1) and the ratchet (2) consist of plastic, the ratchet (2) having a first ratchet tooth (6) and a further ratchet tooth (7), and the ratchet wheel (1) having a first tooth receiver (12) and a further tooth receiver (13), the first ratchet tooth (6) being hookable into the first tooth receiver (12) and the further ratchet tooth (7) being hookable into the further tooth receiver (13).

## Claims

### Claim 1

A parking lock for a vehicle transmission comprising a ratchet wheel (1) and a ratchet (2),
wherein
the ratchet wheel (1) and the ratchet (2) consist of plastic, the ratchet (2) having a first ratchet tooth (6) and a further ratchet tooth (7), and the ratchet wheel (1) having a first tooth receiver (12) and a further tooth receiver (13), the first ratchet tooth (6) being hookable into the first tooth receiver (12) and the further ratchet tooth (7) being hookable into the further tooth receiver (13), wherein the ratchet (2) has reinforcing ribs (8).

### Claim 2 (depends on 1)

Parking lock according to claim 1, wherein the ratchet wheel (1) has, formed on a ratchet wheel outer surface (10), a tooth (4) between the first ratchet tooth (6) and the further ratchet tooth (7).

### Claim 3 (depends on 2)

Parking lock according to claim 2 wherein the ratchet (2) has an intermediate space (9) between the first ratchet tooth (6) and the further ratchet tooth (7).

### Claim 4 (depends on 3)

Parking lock according to claim 3, wherein the intermediate space (9) receives the tooth (4) in the working position.

### Claim 5 (depends on 1)

Parking lock according to claim 1 wherein the ratchet wheel (1) is provided with a receiving opening (3) for a shaft.

### Claim 6 (depends on 1)

Parking lock according to claim 1 wherein the ratchet wheel (1) has a ratchet wheel inner surface (11).

### Claim 7 (depends on 6)

Parking lock according to claim 6, wherein the ratchet wheel inner surface (11) tapers from a first end (15) toward a second end (14) to reduce a circumference of a receiving opening (3) of the ratchet wheel (1).

### Claim 8 (depends on 1)

Parking lock according to claim 1 wherein the ratchet (2) has a through-handle (5).

### Claim 9 (depends on 1)

Parking lock according to claim 1 wherein the ratchet wheel (1) comprises a first sensor.

### Claim 10 (depends on 1)

Parking lock according to claim 1 wherein the ratchet (2) comprises a second sensor.

### Claim 11 (depends on 1)

Parking lock according to claim 1 wherein the plastic is a thermoplastic or a thermosetting plastic or aluminium.

### Claim 12 (depends on 1)

Parking lock according to claim 1 wherein the plastic is reinforced by carbon, glass, mineral or ceramic fibres.

### Claim 13 (depends on 1)

Parking lock according to claim 1 wherein the plastic is reinforced by a plastic insert, the plastic insert being provided with a scrim or fabric of long fibres.