鋼管杭の先端切削刃の取付構造 - Sumitomo Forestry Co., Ltd.

Title:

鋼管杭の先端切削刃の取付構造

Document Type and Number:

Japanese Patent JP5388764

Kind Code:

B2

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Inventors:

Takashi Sato
Nobuaki Shiozawa
Masakazu Fujita

Application Number:

JP2009200719A

Publication Date:

January 15, 2014

Filing Date:

August 31, 2009

Export Citation:

Assignee:

Sumitomo Forestry Co., Ltd.
HG Service Co., Ltd.

International Classes:

E21B10/42; E02D5/28; E02D5/48; E02D7/20; E02D7/22; E21B7/26

Domestic Patent References:

Foreign References:

US20060198706
US20020098045

Attorney, Agent or Firm:

Osamu Hatori
Shuichi Maeda
Akihisa Iwamoto
Yoshiyuki Matsushima

Previous Patent: JPS5388763

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