JPS5747002A - Flow supplying method by variable discharge pump - Google Patents

Flow supplying method by variable discharge pump

Info

Publication number
JPS5747002A
JPS5747002A JP55123280A JP12328080A JPS5747002A JP S5747002 A JPS5747002 A JP S5747002A JP 55123280 A JP55123280 A JP 55123280A JP 12328080 A JP12328080 A JP 12328080A JP S5747002 A JPS5747002 A JP S5747002A
Authority
JP
Japan
Prior art keywords
actuator
discharge pump
variable discharge
valve
activation
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
JP55123280A
Other languages
Japanese (ja)
Inventor
Michiaki Takizawa
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.)
Nissei Plastic Industrial Co Ltd
Original Assignee
Nissei Plastic Industrial 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 Nissei Plastic Industrial Co Ltd filed Critical Nissei Plastic Industrial Co Ltd
Priority to JP55123280A priority Critical patent/JPS5747002A/en
Publication of JPS5747002A publication Critical patent/JPS5747002A/en
Pending legal-status Critical Current

Links

Landscapes

  • Fluid-Pressure Circuits (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

PURPOSE: To ensure a supply of a preset flow rate by a variable discharge pump instantaneously upon activation of an actuator even if there should be a delay of rise of the variable discharge pump by allowing discharging from the pump to a tank in prior to activation of the actuator so as to cause the discharging flow to rise to the preset value.
CONSTITUTION: In a pressure oil passage 3 between an actuator 1 and a variable discharge pump 2, there is disposed a 2-port valve V1 for changing over a flow from the variable discharge pump 2 to either the actuator 1 or a tank 4. A flow presetting valve 5 is interposed between the valve V1 and the variable discharge pump 2. In prior to activation of the actuator 1, the valve V1 is changed over to the tank 4 so that the discharge from the pump 2 may be caused to rise to a preset value whereafter the valve V1 is changed over to the actuator 1 in order to ensure a supply of a required flow rate. In this manner, since a supply of a preset flow rate can be ensured instantaneously upon activation of the actuator 1, various problems arising from a delay of rise of the variable discharge pump 2 can be resolved thereby.
COPYRIGHT: (C)1982,JPO&Japio
JP55123280A 1980-09-05 1980-09-05 Flow supplying method by variable discharge pump Pending JPS5747002A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55123280A JPS5747002A (en) 1980-09-05 1980-09-05 Flow supplying method by variable discharge pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55123280A JPS5747002A (en) 1980-09-05 1980-09-05 Flow supplying method by variable discharge pump

Publications (1)

Publication Number Publication Date
JPS5747002A true JPS5747002A (en) 1982-03-17

Family

ID=14856655

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55123280A Pending JPS5747002A (en) 1980-09-05 1980-09-05 Flow supplying method by variable discharge pump

Country Status (1)

Country Link
JP (1) JPS5747002A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01234602A (en) * 1988-03-14 1989-09-19 Toshiba Mach Co Ltd Hydraulic control circuit and control method therefor
US6449948B2 (en) * 2000-05-22 2002-09-17 Toyota Jidosha Kabushiki Kaisha Hydraulic circuit cleaning apparatus and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01234602A (en) * 1988-03-14 1989-09-19 Toshiba Mach Co Ltd Hydraulic control circuit and control method therefor
US6449948B2 (en) * 2000-05-22 2002-09-17 Toyota Jidosha Kabushiki Kaisha Hydraulic circuit cleaning apparatus and method

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