Non-recirculating rotary ball actuator
US5178030A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 20, 1991 |
| Grant date | Jan 12, 1993 |
| Priority date | — |
| Expiry date | Jun 20, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19786
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A rotary ball actuator has a piston mounted within a body consisting of a first portion and a second portion. The piston has helical ramps which cooperate by means of first balls with helical ramps formed within the first portion, and rectilinear ramps which cooperate by means of second balls with rectilinear ramps formed within the second portion. The first balls and second balls are held respectively within first and second ball cages interposed between the piston and the body and controlled in dependence on the movement of the piston by means of a device comprising a stud and helical ramp. The two cages can be combined into one.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.