High performance intermediate servo assembly
US6907974B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 4, 2003 |
| Grant date | Jun 21, 2005 |
| Priority date | — |
| Expiry date | Apr 4, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D49/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A high performance intermediate servo assembly wherein the servo piston has been modified to provide at least a 17% increase in surface apply area and a corresponding increase in hydraulic pressure delivered to the 2nd gear clutch band which it actuates is disclosed. The present servo piston is reconfigured to an overall length equivalent to the assembled stack-up dimensions of the original equipment servo piston, accumulator, accumulator spring, and spring retainer components and integrates the critical working surfaces thereof to retain proper function. Such original equipment components have been eliminated to simplify the intermediate servo assembly operation since shift feel is not a concern in this application. Further, the standard O-ring seals on the original equipment servo piston are replaced by high performance seals such as quad-lobed seals to ensure the hydraulic integrity of the present intermediate servo assembly under the increased fluid pressure generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.