JPS6220353B2 - - Google Patents

Info

Publication number
JPS6220353B2
JPS6220353B2 JP6452181A JP6452181A JPS6220353B2 JP S6220353 B2 JPS6220353 B2 JP S6220353B2 JP 6452181 A JP6452181 A JP 6452181A JP 6452181 A JP6452181 A JP 6452181A JP S6220353 B2 JPS6220353 B2 JP S6220353B2
Authority
JP
Japan
Prior art keywords
pressure
chamber
line
pilot
piston
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP6452181A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57178082A (en
Inventor
Kunijiro Matsushita
Michihiro Tamaki
Yoshikuni Saiki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kumagai Gumi Co Ltd
Original Assignee
Kumagai Gumi Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kumagai Gumi Co Ltd filed Critical Kumagai Gumi Co Ltd
Priority to JP6452181A priority Critical patent/JPS57178082A/ja
Publication of JPS57178082A publication Critical patent/JPS57178082A/ja
Publication of JPS6220353B2 publication Critical patent/JPS6220353B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Excavating Of Shafts Or Tunnels (AREA)
  • Earth Drilling (AREA)
JP6452181A 1981-04-27 1981-04-27 Oil pressure type hammer Granted JPS57178082A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6452181A JPS57178082A (en) 1981-04-27 1981-04-27 Oil pressure type hammer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6452181A JPS57178082A (en) 1981-04-27 1981-04-27 Oil pressure type hammer

Publications (2)

Publication Number Publication Date
JPS57178082A JPS57178082A (en) 1982-11-02
JPS6220353B2 true JPS6220353B2 (enrdf_load_stackoverflow) 1987-05-06

Family

ID=13260598

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6452181A Granted JPS57178082A (en) 1981-04-27 1981-04-27 Oil pressure type hammer

Country Status (1)

Country Link
JP (1) JPS57178082A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01158945U (enrdf_load_stackoverflow) * 1988-04-25 1989-11-02

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002115490A (ja) * 2000-10-10 2002-04-19 Japan Drilling Co Ltd トンネル掘削装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01158945U (enrdf_load_stackoverflow) * 1988-04-25 1989-11-02

Also Published As

Publication number Publication date
JPS57178082A (en) 1982-11-02

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