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Title:
PUMPING DEVICE
Document Type and Number:
Japanese Patent JPH07243379
Kind Code:
A
Abstract:

PURPOSE: To prevent leakage of fluid outside and to reduce pulsation of discharged fluid by furnishing two pistons revolving by magnetic force in an annulus ring cylinder.

CONSTITUTION: A pump 21 and its driving circuit are furnished. The pump 21 is furnished with an annulus ring cylinder 22, and rotors 24, 30 are stored in vertical two steps in it. Both of the rotors have magnets polarity of which is reciprocally arranged in their circumferential direction. Pistons 28, 34 are respectively installed on both of the rotors 24, 30. An inlet port 36 and an outlet port 38 of fluid are communicated to the cylinder 22. Stators 40, 46 constituting a stepping motor between the cylinder 22 and the rotors 24, 30 are arranged in vertical two steps outside of the cylinder 22 and inside of the rotors 24, 30. Sensors 51-53 to detect the pistons 28, 34 are provided on a wall surface part of the cylinder 22. The driving circuit controls electrification to the stators 40, 46 in correspondence with signals from these sensors 51-53 and rotates the rotors 24, 30 and the pistons 28, 34 reciprocally one cycle each.


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Inventors:
Aono, Masaji
Kitaura, Hiromi
Chiyau, Bin Datsuku
Miyamoto, Naotaka
Application Number:
JP1994000056566
Publication Date:
September 19, 1995
Filing Date:
March 01, 1994
Export Citation:
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Assignee:
IDEC IZUMI CORP
International Classes:
F04B19/04; (IPC1-7): F04B19/04
Attorney, Agent or Firm:
山本 惠二



 
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