JPS6435103A - Hydraulic drive - Google Patents

Hydraulic drive

Info

Publication number
JPS6435103A
JPS6435103A JP18886887A JP18886887A JPS6435103A JP S6435103 A JPS6435103 A JP S6435103A JP 18886887 A JP18886887 A JP 18886887A JP 18886887 A JP18886887 A JP 18886887A JP S6435103 A JPS6435103 A JP S6435103A
Authority
JP
Japan
Prior art keywords
stroke
operating lever
insensible
band
respect
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
JP18886887A
Other languages
Japanese (ja)
Other versions
JP2737779B2 (en
Inventor
Masakazu Haga
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 JP62188868A priority Critical patent/JP2737779B2/en
Publication of JPS6435103A publication Critical patent/JPS6435103A/en
Application granted granted Critical
Publication of JP2737779B2 publication Critical patent/JP2737779B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To improve following performance and reliability by lowering the limit point of insensible band of flow in an actuator with respect to the stroke of an operating lever. CONSTITUTION:A control means 7 having a first setting means for setting high variation rate of stroke of direction control valves 3a-3c with respect to the stroke of an operating lever 1 and a second setting means for setting a low variation rate is arranged between the operating lever 1 and the direction control valves 3a-3c, and a signal is fed from a pressure detector 27 for detecting the limit point of insensible band of flow through actuators 6a-6c with respect to the stroke of spool of the direction control valves 3a-3c to the control means 7. Since the limit point of flow insensible band can be lowered, following performance and reliability of operation of the operating lever are improved.
JP62188868A 1987-07-30 1987-07-30 Hydraulic drive Expired - Fee Related JP2737779B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62188868A JP2737779B2 (en) 1987-07-30 1987-07-30 Hydraulic drive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62188868A JP2737779B2 (en) 1987-07-30 1987-07-30 Hydraulic drive

Publications (2)

Publication Number Publication Date
JPS6435103A true JPS6435103A (en) 1989-02-06
JP2737779B2 JP2737779B2 (en) 1998-04-08

Family

ID=16231276

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62188868A Expired - Fee Related JP2737779B2 (en) 1987-07-30 1987-07-30 Hydraulic drive

Country Status (1)

Country Link
JP (1) JP2737779B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7160840B2 (en) 2001-06-28 2007-01-09 Fuji Photo Film Co., Ltd. Thermal recording material

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5697604A (en) * 1980-01-09 1981-08-06 Kayaba Ind Co Ltd Controller for oil-hydraulic cylinder
JPS6049106A (en) * 1983-08-26 1985-03-18 Kayaba Ind Co Ltd Control device of magnet proportional valve
JPS60146903A (en) * 1984-01-07 1985-08-02 Hitachi Constr Mach Co Ltd Automatic/manual operational control device for hydraulically driven machinery

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5697604A (en) * 1980-01-09 1981-08-06 Kayaba Ind Co Ltd Controller for oil-hydraulic cylinder
JPS6049106A (en) * 1983-08-26 1985-03-18 Kayaba Ind Co Ltd Control device of magnet proportional valve
JPS60146903A (en) * 1984-01-07 1985-08-02 Hitachi Constr Mach Co Ltd Automatic/manual operational control device for hydraulically driven machinery

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7160840B2 (en) 2001-06-28 2007-01-09 Fuji Photo Film Co., Ltd. Thermal recording material

Also Published As

Publication number Publication date
JP2737779B2 (en) 1998-04-08

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Legal Events

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