Geneva gear apparatus for driving an index table
US4428256A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1981 |
| Grant date | Jan 31, 1984 |
| Priority date | — |
| Expiry date | Jun 30, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/1441
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An apparatus for driving an index table which includes a first shaft, an index table rotatably mounted on the first shaft having grooves therein forming a Geneva gear and a mechanism for driving the table in rotation including a drive motor, a second shaft driven by the motor, a crank mounted on the second shaft, and a Geneva pin mounted on the crank. The grooves have force bearing walls which include straight portions and sector portions. The Geneva pin is engaged in the grooves in the table to effect stepwise rotation of the table to equispaced, predetermined angular positions. The second shaft and the grooves are spaced from each other such that the distance from the axis of the second shaft to the circumferential surface of the pin is less than the distance from the axis of the shaft to the straight portions of the force bearing walls of the grooves. The sector portions of the force bearing walls of the grooves are recessed such that the distance from the axis of the second shaft to the circumferential surface of the pin is equal to the distance from the axis of the second shaft to the sector portions of the force bearing walls of the grooves. Thus the circumferential surface o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.