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Title:
高圧往復ポンプおよびその制御
Document Type and Number:
Japanese Patent JP4502629
Kind Code:
B2
Abstract:
A reciprocating pump is controlled by operating the reciprocating pump at constant angular speed except through the closed interval, and varying an angular speed of the reciprocating pump to maintain a constant pump discharge pressure through the closed interval. Independent claims are also included for the following: (a) determining a decompression volume in a pump cylinder for low pressure gradient former switching, comprising determining a recompression volume for the pump cylinder, determining the decompression volume as a function of the recompression volume, and using the decompression volume to time valve openings for low pressure gradient forming; (b) an apparatus for controlling a reciprocating pump, comprising reciprocating pump operating device, and reciprocating pump angular speed varying element; and (c) an apparatus for determining a decompression volume in a pump cylinder, comprising pump cylinder recompression volume determining element, decompression volume determining element, and an element for using the decompression volume to time valve openings.

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Inventors:
Allington, Robert W.
Blakely, Scott Elle.
Walters, Henry Elle.
Application Number:
JP2003391653A
Publication Date:
July 14, 2010
Filing Date:
November 21, 2003
Export Citation:
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Assignee:
ISCO, INC.
International Classes:
F04B13/00; F04B1/02; F04B9/04; F04B11/00; F04B49/06; G01N30/36; G01N30/32
Domestic Patent References:
JP57173753A
JP10501042A
JP2008738A
Foreign References:
US4311586
Attorney, Agent or Firm:
Saichi Suyama



 
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