Hydraulic motor with inlet fluid supplemented by fluid from contracting chamber
US5287794A · kind A · utility
Inventor
Key dates
| Filing date | Jul 23, 1991 |
| Grant date | Feb 22, 1994 |
| Priority date | — |
| Expiry date | Jul 23, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/605
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An arrangement intended for controlling hydraulic motors and comprising inlet elements (17, 18) and outlet elements (7, 5) in the form of valves arranged in a hydraulic circuit which connects the hydraulic motor (1) with a pump (15) which functions as a power source for at least the hydraulic motor (1) and preferably, but not necessarily, for one or more further hydraulic motors, and also to a tank (9). Each inlet element (17, 18) is mounted in the hydraulic circuit on the pressure side of the pump, whereas each outlet element (5, 7) is mounted in the hydraulic circuit on the suction side of the pump. The arrangement is characterized in that each inlet element (17, 18) detects the pressure prevailing in the hydraulic circuit at a location between the hydraulic motor (1) and the outlet element (7, 5), and is also controlled by this detected pressure on load lowering occasions in accordance with a separately applied control-pressure, such as to steer the flow of fluid from one piston side of the hydraulic motor to the other piston side thereof and relieve the pump (15) of load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.