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JPS52114402A - Mechanism for preventing hydraulic rock drill from nooload striking - Google Patents

Mechanism for preventing hydraulic rock drill from nooload striking

Info

Publication number
JPS52114402A
JPS52114402A JP2991276A JP2991276A JPS52114402A JP S52114402 A JPS52114402 A JP S52114402A JP 2991276 A JP2991276 A JP 2991276A JP 2991276 A JP2991276 A JP 2991276A JP S52114402 A JPS52114402 A JP S52114402A
Authority
JP
Japan
Prior art keywords
nooload
striking
rock drill
hydraulic rock
preventing hydraulic
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
JP2991276A
Other languages
Japanese (ja)
Other versions
JPS5923953B2 (en
Inventor
Masao Higuchi
Hiromi Gou
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.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery 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 Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP2991276A priority Critical patent/JPS5923953B2/en
Publication of JPS52114402A publication Critical patent/JPS52114402A/en
Publication of JPS5923953B2 publication Critical patent/JPS5923953B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Earth Drilling (AREA)
  • Percussive Tools And Related Accessories (AREA)
JP2991276A 1976-03-22 1976-03-22 Hydraulic rock drill dry-driving prevention mechanism Expired JPS5923953B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2991276A JPS5923953B2 (en) 1976-03-22 1976-03-22 Hydraulic rock drill dry-driving prevention mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2991276A JPS5923953B2 (en) 1976-03-22 1976-03-22 Hydraulic rock drill dry-driving prevention mechanism

Publications (2)

Publication Number Publication Date
JPS52114402A true JPS52114402A (en) 1977-09-26
JPS5923953B2 JPS5923953B2 (en) 1984-06-06

Family

ID=12289190

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2991276A Expired JPS5923953B2 (en) 1976-03-22 1976-03-22 Hydraulic rock drill dry-driving prevention mechanism

Country Status (1)

Country Link
JP (1) JPS5923953B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53128302U (en) * 1977-03-18 1978-10-12
JPS59178452U (en) * 1983-05-10 1984-11-29 株式会社クボタ Fluid pressure actuator for vibrating earth tools
JP2018130823A (en) * 2017-02-13 2018-08-23 アピュアン株式会社 Impact device, impact force adjustment method for impact device, and impact sound frequency adjustment method for impact device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998004387A1 (en) * 1996-07-25 1998-02-05 Komatsu Ltd. Hydraulically operated breaker with lost-motion prevention device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53128302U (en) * 1977-03-18 1978-10-12
JPS5920478Y2 (en) * 1977-03-18 1984-06-14 日本ニユ−マチツク工業株式会社 Dry striking prevention device for impact power tools
JPS59178452U (en) * 1983-05-10 1984-11-29 株式会社クボタ Fluid pressure actuator for vibrating earth tools
JP2018130823A (en) * 2017-02-13 2018-08-23 アピュアン株式会社 Impact device, impact force adjustment method for impact device, and impact sound frequency adjustment method for impact device

Also Published As

Publication number Publication date
JPS5923953B2 (en) 1984-06-06

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