Index head
US4803765A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 21, 1988 |
| Grant date | Feb 14, 1989 |
| Priority date | — |
| Expiry date | Apr 21, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/1453
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An index head provided with a long rack and a short rack which are slided alternatively towards an index table by the movement of a pinion of a piston rod. The long rack which is characterized to move at a speed twice a forwarding speed of the piston rod, gives to the index table a revolution corresponding to desired divisions. Immediately upon the completion of said revolution of the index table, the short rack which becomes then movable at a speed twice the forwarding speed of the piston rod, brings about, in cooperation of the rotary movement of the pinion, the engagement of the piston rod with the index table, whereby inertia given to the index table through its revolution by the long rack is prevented so as to attain accurate divisions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.