Patent · US Active

Screwdriving power tool with an axially operated percussion mechanism

US8499850B2 · kind B2 · utility

8Cited by

10References

10Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Thomas Hofbrucker · Fürstenfeldbruck, DE
Thomas Bader · Zürich, CH
Markus Looser · Weilheim, DE
Horst Rahmsdorf · Munich, DE

Key dates

Filing date	Sep 6, 2005
Grant date	Aug 6, 2013
Priority date	—
Expiry date	Jun 8, 2031

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB25B21/023
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

The screwdriving power tool includes a hollow spindle (8) rotatably supported in the tool housing (4) and driven by a motor (26), a clutch (30) that rotatably connects and disconnects the hollow spindle (8) with and from the motor (26), respectively, in engagement and disengagement positions of the clutch (30), a screwing-in spindle (6) connected with a chuck (10) for a working tool (12) and connected with the hollow spindle (8) for a joint rotation therewith and for an axial displacement relative thereto, and a percussion mechanism (14) for applying a pulsed axial force to the screwing-in spindle (6), with the clutch (30) being brought into its engagement position by the screwing-in spindle (6) by being displaced against a biasing force of the clutch springs (40, 44), and being locked in its engagement position.

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