JPS5629079A - Automatic pump - Google Patents

Automatic pump

Info

Publication number
JPS5629079A
JPS5629079A JP9735479A JP9735479A JPS5629079A JP S5629079 A JPS5629079 A JP S5629079A JP 9735479 A JP9735479 A JP 9735479A JP 9735479 A JP9735479 A JP 9735479A JP S5629079 A JPS5629079 A JP S5629079A
Authority
JP
Japan
Prior art keywords
pressure
pump
valve
amount
inlet side
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
JP9735479A
Other languages
Japanese (ja)
Inventor
Tomohiko Taki
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 Ltd
Original Assignee
Hitachi 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 Ltd filed Critical Hitachi Ltd
Priority to JP9735479A priority Critical patent/JPS5629079A/en
Publication of JPS5629079A publication Critical patent/JPS5629079A/en
Pending legal-status Critical Current

Links

Landscapes

  • Reciprocating Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

PURPOSE: To prevent increase in frequency in pump starts and stops by providing a check valve at a pump inlet in such a manner as to release the amount of water in response to the pressure at the pump inlet.
CONSTITUTION: A check valve 3 is located at the inlet side of a pump, whose valve 31 is linked to a diaphragm 45. Pressure on the inlet side is working on one end of the diaphragm whereas atmospheric pressure is applied to the other end. Opening of the valve 31 is then regulated by the pressure on the inlet side. Thus, as the amount of water to be lifted is increased, such as in a pressure feed stage, the valve 31 exerts a resistance to the flow of liquid according to the amount of lift. This places a limit on the increase in the liquid flow, thereby making the frequency in pump starts and stops constant.
COPYRIGHT: (C)1981,JPO&Japio
JP9735479A 1979-08-01 1979-08-01 Automatic pump Pending JPS5629079A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9735479A JPS5629079A (en) 1979-08-01 1979-08-01 Automatic pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9735479A JPS5629079A (en) 1979-08-01 1979-08-01 Automatic pump

Publications (1)

Publication Number Publication Date
JPS5629079A true JPS5629079A (en) 1981-03-23

Family

ID=14190148

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9735479A Pending JPS5629079A (en) 1979-08-01 1979-08-01 Automatic pump

Country Status (1)

Country Link
JP (1) JPS5629079A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01154777U (en) * 1988-04-01 1989-10-24
US6078264A (en) * 1989-08-09 2000-06-20 Fujitsu Ten Limited Apparatus for remotely controlling a door locking state and theft prevention alarm state of an automobile

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01154777U (en) * 1988-04-01 1989-10-24
US6078264A (en) * 1989-08-09 2000-06-20 Fujitsu Ten Limited Apparatus for remotely controlling a door locking state and theft prevention alarm state of an automobile
US6091341A (en) * 1989-08-09 2000-07-18 Fujitsu Ten Limited Remote control security system for determining that identification data has been repetitively received continuously during a period of time
US6624740B2 (en) 1989-08-09 2003-09-23 Fujitsu Ten Limited Receiving apparatus

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