Title:
衝撃式削岩用の雄型部、ドリル・ビット及びねじ込み継手
Document Type and Number:
Japanese Patent JP4485944
Kind Code:
B2
Abstract:
The male part includes parts with a reduced cross-section and at least one threading (12) for carrying out percussion drilling in a male part end section (16). A stop surface (14) at the end of the male part is used to transmit shock waves to the rock. The length (L) of the threaded end section is defined as the length of a cylinder (C) which extends from the stopper surface plane (P) and forms a tangent with the external diameter (Dy) of the threading. The threaded end section length/cylinder diameter ratio is 2:1. Independent claims are also included for (a) drill bit and (b) a percussion drilling method.
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Inventors:
Karstryom, Bo
Brügs, Anders
Lundberg, Schristel
Rijebrand, Per-Olov
Brügs, Anders
Lundberg, Schristel
Rijebrand, Per-Olov
Application Number:
JP2004517437A
Publication Date:
June 23, 2010
Filing Date:
June 06, 2003
Export Citation:
Assignee:
Sandvik Intellectual Property Actie Borag
International Classes:
E21B17/00; E21B17/042; B25D17/02; B25D17/08; F16B33/02
Foreign References:
| SE517151C2 | ||||
| US4373754 | ||||
| EP0771934A2 |
Attorney, Agent or Firm:
Atsushi Aoki
Jun Tsuruta
Tetsuro Shimada
Shinozaki Masami
Masaya Nishiyama
Jun Tsuruta
Tetsuro Shimada
Shinozaki Masami
Masaya Nishiyama