# US 7,743,901 B2 · Parking lock releasing apparatus

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- Number: US 7,743,901 B2
- Document ID: US7743901B2
- Status: Granted
- Kind: B2
- Application number: 11/704,213
- Filed: 2007-02-09
- Published: 2007-09-13
- Granted: 2010-06-29
- Earliest claimed: 2006-03-10
- Assignees: Honda Motor Co., Ltd.
- Inventors: Tetsuya Hayashi; Naoki Osawa
- Web page: https://patentgrep.com/patent/US7743901B2

## CPC

- B60T 7/104: {with a locking mechanism}
- F16H 61/22: Locking {of the control input devices} (constructional features of locking or disabling mechanisms F16H63/34)
- F16H 63/3491: {Emergency release or engagement of parking locks or brakes}
- F16H 63/3458: {with electric actuating means, e.g. shift by wire}
- 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
- F16H: GEARING

## Abstract

A parking lock releasing apparatus includes a manipulator element operable to select a parking range of an automatic transmission, a sensor operable to detect a selection by the manipulator element, an actuator operable to operate a parking lock mechanism of the automatic transmission based on a detection by the sensor, and a manual lever operable to manually release an operation of the parking lock mechanism. The manual lever is operable on condition that a parking brake device is in operation.

## Claims

### Claim 1

A parking lock releasing apparatus comprising:
a manipulator element operable to select a parking range of an automatic transmission;
a sensor operable to detect a selection by the manipulator element;
an actuator operable to operate a parking lock mechanism of the automatic transmission based on a detection by the sensor;
a manual lever operable to manually release an operation of the parking lock mechanism, wherein the manual lever is distinct from the manipulator element;
a locking device which allows an operation of the manual lever on condition that a parking brake device is in operation;
a lid operable to cover the manual lever, wherein the locking device is operable to lock the lid in a closed position; and
a primary linkage portion operable to release an operation of the locking device interlockingly with an operation of the parking brake device.

### Claim 2 (depends on 1)

The parking lock releasing apparatus according to claim 1, further comprising:
a towing hook adapted to be coupled to a rope for towing a vehicle; and
a secondary linkage portion operable to release the operation of the locking device when the rope is coupled to the towing hook.

### Claim 3

A parking lock releasing apparatus comprising:
a manipulator element operable to select a parking range of an automatic transmission;
a sensor operable to detect a selection by the manipulator element;
an actuator operable to operate a parking lock mechanism of the automatic transmission based on a detection by the sensor;
a manual lever operable to manually release an operation of the parking lock mechanism; and
a towing hook adapted to be coupled to a rope for towing a vehicle,
wherein the manual lever is operable on condition that the rope is coupled to the towing hook.

### Claim 4 (depends on 3)

The parking lock releasing apparatus according to claim 3, further comprising:
a lid operable to cover the manual lever;
a locking device operable to lock the lid in a closed position; and
a secondary linkage portion operable to release an operation of the locking device when the rope is coupled to the towing hook.