Rotary to linear actuator and method of making the same
US4282764A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 17, 1979 |
| Grant date | Aug 11, 1981 |
| Priority date | — |
| Expiry date | Sep 17, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19721
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A shaft is machined with helical flats or grooves. A collar or nut having a low friction inner face fits the shaft whereby their relative axial movement effects their relative rotation. The collar or nut is a short section of a longer tube which has been formed on a mandrel with corresponding outer dimensions and includes a low friction inner face and an outer thermoset resin body having a helically wound glass filament reinforcing. A minimum winding angle is required because of manufacturing considerations and strength requirements. The profile of the flats or grooves of the mandrel and of the shaft is selected relative to the winding angle of the glass filaments so that the glass filaments are not required to span any reentrant portions in either direction of winding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.