Patent · US Expired

Tool bit and tool bit chuck for hand tools

US5427481A · kind A · utility

6Cited by

5References

16Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Michael Selb · Feldkirch, AT
Heinrich Pauli · Germering, DE
Axel Neukirchen · Drensteinfurt, DE

Key dates

Filing date	Mar 4, 1994
Grant date	Jun 27, 1995
Priority date	—
Expiry date	Mar 4, 2014

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T408/953
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A tool bit to be inserted into a tool bit chuck of a hand tool used for chiseling, drilling and/or percussion drilling has an axially extending chucking shank (A) with two locking grooves (1) closed at the ends spaced apart in the axial direction, and two rotary entrainment grooves (2) open at a free end of the shank. In addition, two rotary entrainment faces (3) are located in the areas of the locking grooves (1).

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