Patent · US Expired

Dust guard cap for a hand-held drilling device

US4664394A · kind A · utility

65Cited by

3References

7Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Werner Theissig · Munich, DE
Gerhard Rumpp · Herrsching am Ammersee, DE

Key dates

Filing date	May 21, 1985
Grant date	May 12, 1987
Priority date	—
Expiry date	May 21, 2005

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T409/30392
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A dust guard cap for the tool holder in a hand-held drilling device is formed of a casing secured on the tool holder and a cover member mounted on and extending across one end of the casing. The cover member forms an opening through which a tool can be inserted into the tool holder. Attached to the cover member and extending inwardly from the through opening is a resilient sleeve-like torus which forms a seal around the tool. An outwardly projecting bead is formed on the inner end of the torus and bears against the casing.

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