Rack bar and rack bar teeth forming die
US9328815B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2013 |
| Grant date | May 3, 2016 |
| Priority date | — |
| Expiry date | Aug 5, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/1967
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A rack bar includes a shaft portion, a rack toothed portion provided on the shaft portion, and a dummy toothed portion. The rack toothed portion includes a plurality of rack teeth provided side by side in an axial direction of the shaft portion, each of the rack teeth including a contact face arranged obliquely relative to the axial direction to contact the pinion gear. The dummy toothed portion includes at least one dummy tooth provided on at least one side of the rack toothed portion in the axial direction such that the dummy tooth is arranged parallel to and next to the rack teeth. The dummy tooth is designed such that a whole height of the dummy tooth is smaller than a whole height of each of the rack teeth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.