JPS56167883A - Multiple pump with auxiliary pump - Google Patents

Multiple pump with auxiliary pump

Info

Publication number
JPS56167883A
JPS56167883A JP7136980A JP7136980A JPS56167883A JP S56167883 A JPS56167883 A JP S56167883A JP 7136980 A JP7136980 A JP 7136980A JP 7136980 A JP7136980 A JP 7136980A JP S56167883 A JPS56167883 A JP S56167883A
Authority
JP
Japan
Prior art keywords
pump
eccentric part
controller
piston
auxiliary
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
JP7136980A
Other languages
Japanese (ja)
Inventor
Takashi Kanai
Masami Ochiai
Morio Oshina
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 JP7136980A priority Critical patent/JPS56167883A/en
Publication of JPS56167883A publication Critical patent/JPS56167883A/en
Pending legal-status Critical Current

Links

Landscapes

  • Details Of Reciprocating Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

PURPOSE: To simplify the entire construction of the pump in a compact size by providing an eccentric part in an input shaft of a volume variable pump and arranging a piston connected to a controller in this eccentric part.
CONSTITUTION: There is provided the eccentric part 4 in the input shaft 1 of the volume variable pump, and there is provided the piston 8 adjacent this eccentric part 4, the cylinder chamber 9 of which is connected to a tank 16 through a check valve 14 and also connected to the controller 17 through another check valve 15. In this arrangement, a single piston can constitute the auxiliary pump for activating the controller 17, thereby simplifying the entire construction of the pump in a compact size.
COPYRIGHT: (C)1981,JPO&Japio
JP7136980A 1980-05-30 1980-05-30 Multiple pump with auxiliary pump Pending JPS56167883A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7136980A JPS56167883A (en) 1980-05-30 1980-05-30 Multiple pump with auxiliary pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7136980A JPS56167883A (en) 1980-05-30 1980-05-30 Multiple pump with auxiliary pump

Publications (1)

Publication Number Publication Date
JPS56167883A true JPS56167883A (en) 1981-12-23

Family

ID=13458510

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7136980A Pending JPS56167883A (en) 1980-05-30 1980-05-30 Multiple pump with auxiliary pump

Country Status (1)

Country Link
JP (1) JPS56167883A (en)

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