Hydraulic pump or motor with interchangeable gears
US4548557A · kind A · utility
Inventor
Key dates
| Filing date | Jun 16, 1983 |
| Grant date | Oct 22, 1985 |
| Priority date | — |
| Expiry date | Jun 16, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C11/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A hydraulic pump motor components including at least two co-acting gears arranged in wells which conform to the gears and which communicate with channels for supply and return oil respectively. To enable the displacement of the pump or motor to be readily changed, the housing of the pump or motor is made in two parts (1, 2) which can be sealingly coupled together. The one part (1), the mounting part, in which the input shaft (3) of the pump, or the output shaft (3) of the motor, is journalled is provided with an inlet and an outlet (10, 11) for supply and return oil respectively. The shaft (3) passes completely through the mounting part (1) and projects from the end surface of the mounting part located in the dividing plane of the housing, for receiving a sun wheel (5). The journal shafts (8, 9) for the planet wheels (6, 7) also project out from the end surface, and channels for supply and return oil respectively discharge into this end surface. The other part of the housing is a readily exchangeable cover (2) which serves as a pressure chamber and which is provided with wells (16) for the planet wheels (5, 6, 7). The cover (2) is also provided with bores (17, 18, 19, 20) which ext…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.