Patent · US Active

Manually operated hammer drill

US8651197B2 · kind B2 · utility

0Cited by

14References

15Claims

0Family size

Assignee

AEG Electric Tools GmbH · DE

Inventors

Armin Eisenhardt · Bisingen, DE
Hans Klöpfer · Waiblingen, DE

Key dates

Filing date	Jan 28, 2011
Grant date	Feb 18, 2014
Priority date	—
Expiry date	Nov 22, 2031

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB25D2250/365
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A manually operated hammer drill (1) includes a spindle (3) that drives a chuck (5) in a rotary manner about an axis of rotation (6) in a drilling mode, and includes a pneumatic hammer mechanism (4), that hammers against a tool inserted in the chuck (5) in a hammer mode. The hammer mechanism (4) has a piston (10) which performs reciprocating movements (12) parallel to the axis of rotation (6) in a cylinder (11) conformed inside the spindle (3) when hammer mode is activated. The piston (10) has at least one radial groove (21) in which an annular seal (22) is arranged.

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