JPS5788275A - Hydraulic actuator for piston pump - Google Patents

Hydraulic actuator for piston pump

Info

Publication number
JPS5788275A
JPS5788275A JP16355080A JP16355080A JPS5788275A JP S5788275 A JPS5788275 A JP S5788275A JP 16355080 A JP16355080 A JP 16355080A JP 16355080 A JP16355080 A JP 16355080A JP S5788275 A JPS5788275 A JP S5788275A
Authority
JP
Japan
Prior art keywords
oil passage
pump
valve
piston pump
hydraulic cylinders
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
JP16355080A
Other languages
Japanese (ja)
Other versions
JPS6125916B2 (en
Inventor
Makoto Niwa
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.)
Kyokuto Kaihatsu Kogyo Co Ltd
Original Assignee
Kyokuto Kaihatsu Kogyo 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 Kyokuto Kaihatsu Kogyo Co Ltd filed Critical Kyokuto Kaihatsu Kogyo Co Ltd
Priority to JP16355080A priority Critical patent/JPS5788275A/en
Publication of JPS5788275A publication Critical patent/JPS5788275A/en
Publication of JPS6125916B2 publication Critical patent/JPS6125916B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Reciprocating Pumps (AREA)

Abstract

PURPOSE: To lower the surge pressure of a concrete pump or the like, by providing an on-off valve in an oil passage which connects other chambers of respective driving hydraulic cylinders to each other so that the cylinders can be locked when the valve is closed, and thereby preventing reverse rotation of the piston pump.
CONSTITUTION: Base chambers a, a' respectively of pump driving hydraulic cylinders 2, 2' are communicated to each other via an oil passage 25, and a pilot operated on-off valve 26 is provided in the oil passage 25. When the necessity of interrupting operation of the piston pump is caused during its operation, operation of a hydraulic pump P is stopped. Thereupon, pressure in a high- pressure oil passage 15 is lowered and that in a pilot oil passage 27 is also lowered. Resultantly, the valve 26 is shifted to the right position by the force of a spring and closes the oil passage 25, so that both of the hydraulic cylinders 2, 2' are locked. This in turn causes locking of pump pistons 3, 3' connected to respective driving pistons 4, 4' in a unitary manner, so that reverse rotation of the piston pump can be prevented positively.
COPYRIGHT: (C)1982,JPO&Japio
JP16355080A 1980-11-20 1980-11-20 Hydraulic actuator for piston pump Granted JPS5788275A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16355080A JPS5788275A (en) 1980-11-20 1980-11-20 Hydraulic actuator for piston pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16355080A JPS5788275A (en) 1980-11-20 1980-11-20 Hydraulic actuator for piston pump

Publications (2)

Publication Number Publication Date
JPS5788275A true JPS5788275A (en) 1982-06-02
JPS6125916B2 JPS6125916B2 (en) 1986-06-18

Family

ID=15776022

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16355080A Granted JPS5788275A (en) 1980-11-20 1980-11-20 Hydraulic actuator for piston pump

Country Status (1)

Country Link
JP (1) JPS5788275A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59226287A (en) * 1983-06-06 1984-12-19 Kyokuto Kaihatsu Kogyo Co Ltd Hydraulic pressure operating device of piston pump for sending fluid body by pressure
JPS6263188A (en) * 1985-09-17 1987-03-19 Mitsubishi Heavy Ind Ltd Concrete piston reverse motion preventive device of concrete pump
KR100803314B1 (en) 2006-07-20 2008-02-14 이삼행 Mortar pump control device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59226287A (en) * 1983-06-06 1984-12-19 Kyokuto Kaihatsu Kogyo Co Ltd Hydraulic pressure operating device of piston pump for sending fluid body by pressure
JPS6263188A (en) * 1985-09-17 1987-03-19 Mitsubishi Heavy Ind Ltd Concrete piston reverse motion preventive device of concrete pump
KR100803314B1 (en) 2006-07-20 2008-02-14 이삼행 Mortar pump control device

Also Published As

Publication number Publication date
JPS6125916B2 (en) 1986-06-18

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