EP 0974428 A3 20030212 - Handheld drilling machine with compressed-air-operated percussion mechanism
Title (en)
Handheld drilling machine with compressed-air-operated percussion mechanism
Title (de)
Handbohrgerät mit drucklufterregtem Schlagwerk
Title (fr)
Machine à forer portable avec mécanisme à percussion mû à l' air comprimé
Publication
Application
Priority
DE 19832946 A 19980722
Abstract (en)
[origin: EP0974428A2] The output shaft (15) carries a chuck and is axially moveable when impacted by the piston (30) which slides back and forth in the cylinder housing (22) according to the position of a shuttle (41), and bores (46-52) with pressure applied to an opening (24). Air is released through an opening (23). As the piston contacts the output shaft the shuttle is pushed back to reverse the air flow until the piston contacts a rear face (26), after which it again reverses the air flow.
IPC 1-7
IPC 8 full level
B23B 45/16 (2006.01); B25D 9/04 (2006.01); B25D 16/00 (2006.01)
CPC (source: EP US)
B25D 9/04 (2013.01 - EP US); B25D 16/00 (2013.01 - EP US); B25D 17/06 (2013.01 - EP US); B25D 2211/003 (2013.01 - EP US); B25D 2217/0023 (2013.01 - EP US); B25D 2250/341 (2013.01 - EP US)
Citation (search report)
- [Y] US 4506742 A 19850326 - FUKASE YUTAKA [JP]
- [Y] GB 2188270 A 19870930 - BERGWERKSVERBAND GMBH
- [A] BOILLAT P ET AL: "LES DIFFERENTES TECHNIQUES DE FORATION", INDUSTRIE MINERALE - MINES ET CARRIERES, EDITIONS GEDIM. ST ETIENNE, FR, vol. 75, no. SUPPLEMENT, 1 April 1993 (1993-04-01), pages 36 - 70, XP000383297, ISSN: 0994-2556
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0974428 A2 20000126; EP 0974428 A3 20030212; CN 1251794 A 20000503; DE 19832946 A1 20000127; JP 2000071117 A 20000307; US 6209659 B1 20010403
DOCDB simple family (application)
EP 99810527 A 19990614; CN 99110615 A 19990720; DE 19832946 A 19980722; JP 20814199 A 19990722; US 35743799 A 19990720