Pull reamer
US8931981B2 · kind B2 · utility
0Cited by
14References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 24, 2009 |
| Grant date | Jan 13, 2015 |
| Priority date | — |
| Expiry date | Nov 15, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/909
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In order to allow high-precision machining of the inner surface of a pipe using little machining time, the draw broach has a cutting part having a plurality of cutters extending in the axial draw direction. The cutting part is divided into a main part and an insertion part tapering conically in the draw direction. The insertion part in turn is divided into a front region, viewed in the draw direction, forming a pre-cutting stage, and a rear region, wherein the conicity of the pre-cutting stage is less than that of the rear region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.