Fluid power device
US4210063A · kind A · utility
Inventor
Key dates
| Filing date | Jan 10, 1979 |
| Grant date | Jul 1, 1980 |
| Priority date | — |
| Expiry date | Jan 10, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/18312
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fluid actuated power device which includes a reciprocal cylinder rotatably mounted on a central, tubular shaft for back-and-forth movement along the shaft between a pair of end support members. The cylinder has first and second sets of spiral grooves on its outer surface, the first set of spiral grooves being in mesh with the spiral teeth of a first ratchet gear and the second set of spiral grooves being in mesh with the spiral teeth of a second ratchet gear, the ratchet gears being carried by a cylindrical body fixed relative to the shaft. The ratchet gears permit the cylinder to rotate only in one direction relative to and about the shaft as the cylinder moves back and forth along the length of the shaft. The cylinder is coupled by spline means to a gear assembly which, in turn, is connected to a rotatable second shaft, the latter serving as a power takeoff means which can be connected to external work-producing apparatus. A piston within the cylinder and rigid to the central part of the first-mentioned shaft allows a fluid under pressure to be alternately applied to the two chambers of the cylinder on opposite sides of the piston to thereby cause the back and forth movement of…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.