Low speed hydraulic motor with counter balanced planetating drive ring and spring biased vanes
US4253806A · kind A · utility
7Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 13, 1979 |
| Grant date | Mar 3, 1981 |
| Priority date | — |
| Expiry date | Apr 13, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF03C2/302
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A drive ring for a rotary expansible chamber hydraulic motor has driving gear teeth on its inner periphery and is constrained against other than planetating motion by a series of angularly spaced eccentric bearings rotatably mounted in fixed port plates between which the drive ring is sandwiched. The eccentric bearings are hydorstatically balanced against peak loads with high pressure fluid. Vanes sliding in radial slots in the drive ring are maintained in engagement against a surrounding cylindrical chamber wall by leaf springs whose opposite ends slide in grooves in the port plates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.