Patent · US Expired

Shank for a rotary/percussion tool

US7261169B2 · kind B2 · utility

13Cited by

1References

18Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Werner Kleine · Achim, DE
Werner Britten · Riegelsberg, DE

Key dates

Filing date	Aug 20, 2004
Grant date	Aug 28, 2007
Priority date	—
Expiry date	Jul 7, 2025

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T408/907
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A shank for a working tool has at least three recesses (5) provided within the lockable region (3) and arranged in a cross-section (c-c) to the tool axis (A) at least at angles of 0°, 120°, and 240° within the radial reference dimension (R) of the shank, with at least one of the recesses (5) being axially closed toward a free end of the shank (1), and at least one protrusion (6) arranged circumferentially between two adjacent recesses (5) outside of the radial reference dimension, with the sum of central recess angles (α) of the recesses amounting to at least 150°, and a central protrusion angle (β) of the at least one protrusion (6) being smaller than a central recess angle (α).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.