(19)
(11) EP 2 246 569 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
22.06.2011 Bulletin 2011/25

(43) Date of publication A2:
03.11.2010 Bulletin 2010/44

(21) Application number: 10160593.9

(22) Date of filing: 21.04.2010
(51) International Patent Classification (IPC): 
F04B 35/04(2006.01)
 F04B 49/06(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
Designated Extension States:
AL BA ME RS

(30) Priority: 21.04.2009 US 171254 P

(71) Applicant: ITT Manufacturing Enterprises, Inc.
Wilmington, Delaware 19801 (US)

(72) Inventors:
  • Derrick, Thanh Tran
    Yorba Linda, CA 92886 (US)
  • Dang, Thang Quoc
    Huntington Beach, CA 92646 (US)
  • Naval, Rufino Jr.
    San Juan Capistrano, CA 92675 (US)
  • Phillips, David L.
    Santa Ana, CA 92704 (US)

(74) Representative: Dreiss 
Patentanwälte Gerokstrasse 1
70188 Stuttgart
70188 Stuttgart (DE)

   


(54) Pump controller


(57) The present invention provides a technique using current sensing to control the pressure at constant level without the direct sensing of the pressure. This technique will help to reduce dependency solely on switch or sensor and their non linearity and other associated problems such as the non-repetitive behavior, being affected by EMI etc. The technique includes using a pump controller featuring one or more modules configured to respond to one or more input signals containing information about current provided from a pump; and configured to provide one or more output signals containing information to control the pump to operate at a substantially constant pressure without the direct sensing of pump pressure. The one or more modules control the operation of the pump based at least partly on a table of characteristics related to voltage and current that is calibrated for each pump.







Search report