Midplane porting block for an axial piston machine
US3975990A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 23, 1975 |
| Grant date | Aug 24, 1976 |
| Priority date | — |
| Expiry date | Jan 23, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01B3/0055
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A skid-steered vehicle, especially an end loader, having a hydrostatic transmission. The transmission will have a series pump unit comprising two pump sections separated by a midplane porting block. Each pump section includes an axial piston group rotating on a common axis on opposite sides of the block. A pair of arcuate ports in each side of the block circumjacent the axis of rotation are in fluid communication with each piston group. Internal passages within the block include at least one passage communicating with one arcuate port of each pair which crosses from one side of the axis of rotation to the other before reaching an exposed surface of the block. In this manner, the external crossing of hydraulic hoses is eliminated facilitating shorter, more direct hydraulic coupling with associated hydraulic components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.