Hydraulic piston machine
US5573380A · kind A · utility
6Cited by
2References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1995 |
| Grant date | Nov 12, 1996 |
| Priority date | — |
| Expiry date | Apr 20, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05C2253/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A hydraulic piston machine is disclosed, having a cylinder drum and a control plate, which control plate has at least one high-pressure "kidney" and at least one low-pressure "kidney" and also a contact surface against which the cylinder drum bears in operation, at least the contact surface being provided with a friction-reducing layer. It is desirable for such a machine to have better operational behavior and a longer service life. For that purpose, the contact surface in the region of the low-pressure kidney has a recessed region forming a gap between the cylinder drum and the control plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.