Parking mechanism for a power transmission
US5365804A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1993 |
| Grant date | Nov 22, 1994 |
| Priority date | — |
| Expiry date | Jun 2, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/214
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A countershaft type power transmission has a plurality of selectively engageable friction clutches for establishing a plurality of forward drive ratios and a reverse drive ratio between meshing gear members on an input shaft, a countershaft and an output shaft. One of the power paths established by the meshing gears includes a gear member rotationally fast on the output shaft. A parking pawl member is selectively engageable with this gear member to prevent output shaft rotation when parking is desired. The pawl has teeth formed thereon having a profile which permit continuous simultaneous engagement between two teeth on the pawl and two teeth on the gear member regardless of the rotational bias imposed on the output shaft during parking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.