Apparatus and method for machining an enveloping-type worm screw
US4588337A · kind A · utility
4Cited by
4References
39Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 13, 1984 |
| Grant date | May 13, 1986 |
| Priority date | — |
| Expiry date | Mar 13, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T409/300112
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method and apparatus are disclosed for machining hourglass screw threads on an enveloping-type worm screw by engaging at least one angularly positioned cutter with a screw blank having an hourglass shape. The screw blank is rotated about its central longitudinal axis at the same time that each angularly positioned cutter is pivoted through the screw blank at a rate which is less than the rate of rotation of the screw blank.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.