Global Patent Index - EP 1089856 A1

EP 1089856 A1 2001-04-11 - PERCUSSIVE MECHANISM FOR A PERCUSSIVE OR ROTARY PERCUSSIVE TOOL

Title (en)

PERCUSSIVE MECHANISM FOR A PERCUSSIVE OR ROTARY PERCUSSIVE TOOL

Title (de)

SCHLAGWERK FÜR EIN SCHLAGEND ODER DREHSCHLAGEND ARBEITENDES WERKZEUG

Title (fr)

MECANISME DE PERCUSSION POUR UN OUTIL TRAVAILLANT PAR PERCUSSION OU PAR ROTO-PERCUSSION

Publication

EP 1089856 A1 (DE)

Application

EP 99923508 A

Priority

  • DE 19819914 A
  • DE 29815770 U
  • EP 9902977 W

Abstract (en)

[origin: WO9956917A1] The invention relates to a percussive mechanism for a percussive or rotary percussive tool, comprising a rotating external rotor and an internal rotor which rotates in the former at a relative speed. Within the internal rotor a hollow space extending in an axial direction is embodied in which a percussive piston is moved back and forth by means of a suction chamber and a compacting chamber which are alternately created between the internal rotor and the external rotor. The aim of the invention is to provide a percussive mechanism which is more effective and compact as well relatively light. To this end a spring mechanism is provided for in the rear end area of the hollow space facing away from the tool which stores the kinetic energy of the returning percussive piston and when the percussive piston moves in the other direction releases the stored energy to move the percussive piston forward.

IPC 1-7 (main, further and additional classification)

B25D 11/06; B25D 9/08; B25D 9/26

IPC 8 full level (invention and additional information)

B25D 16/00 (2006.01)

CPC (invention and additional information)

B25D 16/00 (2013.01)

Citation (search report)

See references of WO 9956917A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9956917 A1 19991111; AU 4036099 A 19991123; EP 1089856 A1 20010411

INPADOC legal status


2004-09-29 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20040318

2004-01-07 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20031107

2001-04-11 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20001205

2001-04-11 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE