JPH0443157B2 - - Google Patents

Info

Publication number
JPH0443157B2
JPH0443157B2 JP17238684A JP17238684A JPH0443157B2 JP H0443157 B2 JPH0443157 B2 JP H0443157B2 JP 17238684 A JP17238684 A JP 17238684A JP 17238684 A JP17238684 A JP 17238684A JP H0443157 B2 JPH0443157 B2 JP H0443157B2
Authority
JP
Japan
Prior art keywords
thrust cylinder
hydraulic pump
pressure
variable displacement
comparator
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
JP17238684A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6153996A (ja
Inventor
Koji Takeda
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 JP17238684A priority Critical patent/JPS6153996A/ja
Publication of JPS6153996A publication Critical patent/JPS6153996A/ja
Publication of JPH0443157B2 publication Critical patent/JPH0443157B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP17238684A 1984-08-21 1984-08-21 アースドリルにおける掘削作動制御方法 Granted JPS6153996A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17238684A JPS6153996A (ja) 1984-08-21 1984-08-21 アースドリルにおける掘削作動制御方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17238684A JPS6153996A (ja) 1984-08-21 1984-08-21 アースドリルにおける掘削作動制御方法

Publications (2)

Publication Number Publication Date
JPS6153996A JPS6153996A (ja) 1986-03-18
JPH0443157B2 true JPH0443157B2 (enrdf_load_html_response) 1992-07-15

Family

ID=15940956

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17238684A Granted JPS6153996A (ja) 1984-08-21 1984-08-21 アースドリルにおける掘削作動制御方法

Country Status (1)

Country Link
JP (1) JPS6153996A (enrdf_load_html_response)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59112891U (ja) * 1983-04-18 1984-07-30 三菱電機株式会社 巻上機の過負荷防止装置
JPH0447274Y2 (enrdf_load_html_response) * 1987-06-08 1992-11-09

Also Published As

Publication number Publication date
JPS6153996A (ja) 1986-03-18

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees