Hydraulic motor with air distributor-operated valves
US4110981A · kind A · utility
Inventor
Key dates
| Filing date | Aug 17, 1977 |
| Grant date | Sep 5, 1978 |
| Priority date | — |
| Expiry date | Aug 17, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF03C1/02
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An oil-operated motor driven from an air-pressurized oil supply tank. The motor has sets of opposing cylinders having oil admission valves and containing drive pistons connected to a crankshaft. The cylinders are connected to the pressurized supply tank through the admission valves and respective ones of a pair of compressed air-controlled pilot valves. The pilot valves are controlled by relay valves alternately opened by a rotating cam driven by the crankshaft. The pilot valves control the delivery of pressurized oil to cylinders arranged to be alternately supplied with pressurized oil, with their pistons acting to drive the crankshaft in a common direction by alternate power pulsations. A common compressed air supply is employed to pressurize the oil reservoir and to operate the pilot valves. The exhaust oil from the motor is returned to the oil reservoir by a hydraulic pump driven by the main oil-operated motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.