Global Patent Index - EP 0994986 A1

EP 0994986 A1 2000-04-26 - ELECTROMAGNETIC HAMMER WITH MOBILE FERROMAGNETIC WEIGHT

Title (en)

ELECTROMAGNETIC HAMMER WITH MOBILE FERROMAGNETIC WEIGHT

Title (de)

ELEKTROMAGNETISCHER HAMMER MIT FERROMAGNETISCHER, BEWEGLICHER MASSE

Title (fr)

MARTEAU ELECTROMAGNETIQUE A MASSE FERROMAGNETIQUE MOBILE

Publication

EP 0994986 A1 (FR)

Application

EP 98933722 A

Priority

  • FR 9801351 W
  • FR 9708654 A

Abstract (en)

[origin: FR2765904A1] The invention concerns an electromagnetic hammer with mobile ferromagnetic weight, comprising a tube (1) designed to rest via an anvil on an element to be driven in (50), bearing a peripheral winding (2), a weight (14) received sliding in the tube (1), and electric powering means connected to the winding (2) to excite the latter to generate an electromagnetic field for lifting the weight. The weight is urged to strike the anvil by the action of its own mass when the winding is no longer excited, the winding being made by wound package around the tube (1), and the tube being made of a non-magnetic material and comprising means (3, 4, 5, 6) for picking up axial load, and transmitting this load to the anvil (13) when the weight (14) goes up again. The powering means comprise a flywheel associated with a rotating motor and an alternator.

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

E02D 7/06

IPC 8 full level (invention and additional information)

B25D 13/00 (2006.01); E02D 7/06 (2006.01)

CPC (invention and additional information)

E02D 7/06 (2013.01)

Citation (search report)

See references of WO 9902787A1

Designated contracting state (EPC)

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

EPO simple patent family

FR 2765904 A1 19990115; FR 2765904 B1 19991008; AT 222625 T 20020915; AU 8344598 A 19990208; CA 2295873 A1 19990121; CA 2295873 C 20020917; DE 69807335 D1 20020926; DE 69807335 T2 20030515; EP 0994986 A1 20000426; EP 0994986 B1 20020821; US 6201362 B1 20010313; WO 9902787 A1 19990121

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