JPS5223501A - Hydraulic spring type hole bottom striking device for boring - Google Patents

Hydraulic spring type hole bottom striking device for boring

Info

Publication number
JPS5223501A
JPS5223501A JP9992975A JP9992975A JPS5223501A JP S5223501 A JPS5223501 A JP S5223501A JP 9992975 A JP9992975 A JP 9992975A JP 9992975 A JP9992975 A JP 9992975A JP S5223501 A JPS5223501 A JP S5223501A
Authority
JP
Japan
Prior art keywords
boring
hole bottom
spring type
striking device
type hole
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.)
Pending
Application number
JP9992975A
Other languages
English (en)
Inventor
Keiji Kumamoto
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.)
Koken Boring Machine Co Ltd
Original Assignee
Koken Boring Machine 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 Koken Boring Machine Co Ltd filed Critical Koken Boring Machine Co Ltd
Priority to JP9992975A priority Critical patent/JPS5223501A/ja
Publication of JPS5223501A publication Critical patent/JPS5223501A/ja
Pending legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP9992975A 1975-08-18 1975-08-18 Hydraulic spring type hole bottom striking device for boring Pending JPS5223501A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9992975A JPS5223501A (en) 1975-08-18 1975-08-18 Hydraulic spring type hole bottom striking device for boring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9992975A JPS5223501A (en) 1975-08-18 1975-08-18 Hydraulic spring type hole bottom striking device for boring

Publications (1)

Publication Number Publication Date
JPS5223501A true JPS5223501A (en) 1977-02-22

Family

ID=14260428

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9992975A Pending JPS5223501A (en) 1975-08-18 1975-08-18 Hydraulic spring type hole bottom striking device for boring

Country Status (1)

Country Link
JP (1) JPS5223501A (ja)

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