Hydraulic motor with wobble-stick and brake assembly
US4981423A · kind A · utility
20Cited by
5References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 3, 1989 |
| Grant date | Jan 1, 1991 |
| Priority date | — |
| Expiry date | Oct 3, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C15/0057
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A hydraulic device includes a hydraulic motor having a wobble shaft driven by a rotor of a gerotor gear set. An outer end of the wobble shaft is received in a hollow inner end portion of an output shaft. A brake assembly holds the motor output shaft against rotation when the hydraulic motor is being operated. A seal blocks fluid flow between the brake assembly and the hydraulic motor. The seal is disposed in sealing engagement with the hollow end portion of the output shaft at a location between the motor and the brake assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.