Hydraulic drive apparatus
US7487636B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 11, 2006 |
| Grant date | Feb 10, 2009 |
| Priority date | — |
| Expiry date | Jul 13, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2125/40
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a hydraulic drive apparatus such as a transaxle, a rotatable hydraulic pump and rotatable hydraulic motor are disposed in a housing forming a sump. A hydraulic mounting member such as a center section is disposed in the sump and includes a pump mounting surface for the pump and a motor mounting surface for the motor, with hydraulic porting formed in the center section for connecting the mounting surfaces. The center section includes a channel formed on an external surface thereof, and at least one of the housing members is engaged to the center section to close the channel and form a fluid passage in the center section. This engagement is either direct, such as through sealant, or indirect through a cover.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.