Patent · US Active

Hand-held power tool with a pneumatic percussion mechanism

US8267189B2 · kind B2 · utility

3Cited by

12References

4Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Erwin Manschitz · Germering, DE
Reinhard Schulz · Hannover, DE
Alexander Loeffler · Kaufering, DE

Key dates

Filing date	Jun 16, 2008
Grant date	Sep 18, 2012
Priority date	—
Expiry date	Feb 27, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T74/18312
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A hand-held power tool includes a motor-driven percussion mechanism. The percussion mechanism includes a guide tube (21) and a reciprocating driving member (22) displaceable in the guide tube (21) for driving, via a gas spring, an impact member (23) likewise displaceable in the guide tube (21). The percussion mechanism further includes a motor-driven eccentric wheel (17) rotatable about an axis (D) which is spaced from the percussion mechanism axis (S) in a direction perpendicular to the percussion mechanism axis (S) by a distance (X). A connection rod (29) is eccentrically supported on the eccentric wheel (17) and connected to the driving member (22) for converting a rotational movement of the eccentric wheel (17) into a reciprocating movement of the driving member (22).

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