JPS61282587A - 逆進可能な地中貫孔機 - Google Patents

逆進可能な地中貫孔機

Info

Publication number
JPS61282587A
JPS61282587A JP12203485A JP12203485A JPS61282587A JP S61282587 A JPS61282587 A JP S61282587A JP 12203485 A JP12203485 A JP 12203485A JP 12203485 A JP12203485 A JP 12203485A JP S61282587 A JPS61282587 A JP S61282587A
Authority
JP
Japan
Prior art keywords
striker
variable volume
volume chamber
air
underground
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.)
Granted
Application number
JP12203485A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0349350B2 (enExample
Inventor
大塚　忠夫
堀江　博元
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.)
Kyokuto Kaihatsu Kogyo Co Ltd
Original Assignee
Kyokuto Kaihatsu Kogyo 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 Kyokuto Kaihatsu Kogyo Co Ltd filed Critical Kyokuto Kaihatsu Kogyo Co Ltd
Priority to JP12203485A priority Critical patent/JPS61282587A/ja
Publication of JPS61282587A publication Critical patent/JPS61282587A/ja
Publication of JPH0349350B2 publication Critical patent/JPH0349350B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP12203485A 1985-06-05 1985-06-05 逆進可能な地中貫孔機 Granted JPS61282587A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12203485A JPS61282587A (ja) 1985-06-05 1985-06-05 逆進可能な地中貫孔機

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12203485A JPS61282587A (ja) 1985-06-05 1985-06-05 逆進可能な地中貫孔機

Publications (2)

Publication Number Publication Date
JPS61282587A true JPS61282587A (ja) 1986-12-12
JPH0349350B2 JPH0349350B2 (enExample) 1991-07-29

Family

ID=14825956

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12203485A Granted JPS61282587A (ja) 1985-06-05 1985-06-05 逆進可能な地中貫孔機

Country Status (1)

Country Link
JP (1) JPS61282587A (enExample)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4872001A (enExample) * 1971-11-18 1973-09-28
JPS5044608A (enExample) * 1973-08-11 1975-04-22

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4872001A (enExample) * 1971-11-18 1973-09-28
JPS5044608A (enExample) * 1973-08-11 1975-04-22

Also Published As

Publication number Publication date
JPH0349350B2 (enExample) 1991-07-29

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