EP 1117508 B1 20021016 - PNEUMATIC PERCUSSION POWER TOOL WITH PNEUMATIC RETURNING SPRING
Title (en)
PNEUMATIC PERCUSSION POWER TOOL WITH PNEUMATIC RETURNING SPRING
Title (de)
LUFTFEDERSCHLAGWERK MIT RÜCKHOLLUFTFEDER
Title (fr)
APPAREIL DE PERCUSSION A COUSSIN D'AIR DE RAPPEL
Publication
Application
Priority
- DE 19843642 A 19980923
- EP 9905937 W 19990813
Abstract (en)
[origin: DE19843642A1] A pneumatic percussion power tool has a percussion tool housing (1), in which a drive piston (2) and a percussion piston (9) are movable in axial direction. The motion of the drive piston (2) generated by a crank mechanism is transmitted to the percussion piston (9) through a pneumatic spring in a first chamber (10), said piston cyclically striking a ram (11) or a tool. The backward motion of the percussion piston (9) rebounding from the ram (11) is supported by increasing air pressure in a third chamber (15) that is supplied with air by the drive piston (2) through a second chamber (14) and a communicating channel (13).
IPC 1-7
IPC 8 full level
B25D 9/04 (2006.01); B25D 9/14 (2006.01); B25D 11/00 (2006.01); B25D 17/00 (2006.01)
CPC (source: EP US)
B25D 11/005 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE ES LI SE
DOCDB simple family (publication)
DE 19843642 A1 20000406; DE 19843642 B4 20040325; DE 59903113 D1 20021121; EP 1117508 A1 20010725; EP 1117508 B1 20021016; ES 2186403 T3 20030501; JP 2002526275 A 20020820; JP 4518452 B2 20100804; US 6523622 B1 20030225; WO 0016948 A1 20000330
DOCDB simple family (application)
DE 19843642 A 19980923; DE 59903113 T 19990813; EP 9905937 W 19990813; EP 99944386 A 19990813; ES 99944386 T 19990813; JP 2000573888 A 19990813; US 67496800 A 20001107