Oscilatory hydraulic actuators with internal supply, return, and control passageways for multi-axis wrist actuator
US4899637A · kind A · utility
12Cited by
18References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 17, 1984 |
| Grant date | Feb 13, 1990 |
| Priority date | — |
| Expiry date | Sep 17, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86268
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A rotary actuator includes a shaft rotatably mounted on a body, and a servovalve arranged to operate a vane motor for selectively rotating the shaft relative to the body. A portion of the shaft extends beyond the body. Supply and return passages are provided to the body and shaft so that fluid power supplied to the body is supplied to the servovalve and is also available at the end of the shaft beyond the body. Two or more such rotary actuators may be connected by intermediate brackets to provide a wrist actuator capable of movement about axes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.