Title:
【発明の名称】衝撃機械装置
Document Type and Number:
Japanese Patent JP2870942
Kind Code:
B2
Abstract:
Device in impact machines. The device comprises a number of rods (6) provided with projections (51). The rods are journalled in a surrounding set of tubes (7) by means of elastic bushings (52,53) which are provided with grooves (57) though which said projections can be passed.
Inventors:
IERUGEN ARUFU ROOBEATO ROODAATO
Application Number:
JP5388490A
Publication Date:
March 17, 1999
Filing Date:
March 07, 1990
Export Citation:
Assignee:
ATORASU KOPUKO KONSUTORAKUSHON ANDO MAININGU TEKUNIIKU AB
International Classes:
E21B3/00; E21B6/02; E21B7/20; E21B17/00; E21B17/10; E21B4/02; E21B21/00; E21B21/10; (IPC1-7): E21C1/12; E21B6/00; E21B17/00; E21B21/10; E21C7/08
Domestic Patent References:
| JP56150291A |
Other References:
【文献】米国特許3401758(US,A)
【文献】欧州公開197019(EP,A1)
【文献】欧州公開197019(EP,A1)
Attorney, Agent or Firm:
Shigeru Yagita (3 outside)