Tool holder block and sleeve retained therein by interference fit
US7270379B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 22, 2006 |
| Grant date | Sep 18, 2007 |
| Priority date | — |
| Expiry date | Sep 22, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C35/197
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A hollow sleeve is mounted in a hole of a holder block to receive a rotary cutter bit. The sleeve includes a front flange and a shank extending rearwardly from the front flange and defining a longitudinal axis. The shank includes an outer periphery having a radially stepped configuration, wherein an outer surface of the shank includes a plurality of axially adjacent surface sections that become successively smaller in cross-section in a direction away from the flange. Each surface section occupies one-third of the hole length. Each surface section has longitudinally spaced front and rear ends, wherein a portion of each surface section situated between its front and rear ends is spaced farther from the axis than are the front and rear ends. Each surface section has a generally longitudinally extending groove formed therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.