The drive transmission mechanism of a double pipe drilling machine, and a double pipe drilling machine

Title:

The drive transmission mechanism of a double pipe drilling machine, and a double pipe drilling machine

Document Type and Number:

Japanese Patent JP6007734

Kind Code:

B2

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Inventors:

Arisa Saito
Hideo Kinashi
Naoki Kato
Satoshi Ito

Application Number:

JP2012246596A

Publication Date:

October 12, 2016

Filing Date:

November 08, 2012

Export Citation:

Assignee:

Obayashi Corporation

International Classes:

E21B6/00; E21B4/14

Domestic Patent References:

Attorney, Agent or Firm:

Isshiki International Patent Service Corporation

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