Apparatus and method for cleaning and fluid exchange of a low-flow automatic transmission
US6065567A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1998 |
| Grant date | May 23, 2000 |
| Priority date | — |
| Expiry date | Jun 29, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87249
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fail-safe transmission service machine (12) allows old ATF to be pumped out of a transmission (10b) as a vehicle engine (10a) runs while the vehicle (10) is stationary. The machine (12) responsively pumps a matching volume of new ATF into the transmission so that dry running of the transmission can not occur. If the supply of new ATF runs out or if power to the service machine (12) is interrupted, the machine reverts to closed loop fluid circulation for the transmission. A hydraulic rectifier (42) provides for universal connection of hoses between the transmission cooler fluid circulation loop (39) of the vehicle (10) and the service machine (12). An electrically driven assistance pump (94) allows the service of vehicles which have low-flow or low-pressure transmission pumps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.