Park lock for an automatic transmission in a motor vehicle
US11215282B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 6, 2018 |
| Grant date | Jan 4, 2022 |
| Priority date | — |
| Expiry date | Sep 6, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H63/3483
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A parking lock includes a locking pawl (2) and an interlocking element (6) arranged on a connecting bar (5) to a selector lever (4). During engagement of the parking lock, the selector lever (4) is rotated by a spring (9). A hydraulically actuatable actuator (10) including two pistons (11, 12). A first piston (11) is pressurized in order to disengage the parking lock and axially displace the second piston (12) against a spring (9). Axial movement of the second piston (12) rotates the selector lever (4) and vice versa. A detent device (13) of the actuator (10), is actuatable by an electromagnet (13a). An emergency release device (15) is operatively connectable with the selector lever (4) so that the second piston (12) is axially displaceable by the selector lever (4) without displacing the first piston (11).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.