(19)
(11) EP 2 551 521 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
25.12.2013 Bulletin 2013/52

(43) Date of publication A2:
30.01.2013 Bulletin 2013/05

(21) Application number: 12177655.3

(22) Date of filing: 24.07.2012
(51) International Patent Classification (IPC): 
F04B 9/02(2006.01)
F16H 47/00(2006.01)
F04C 11/00(2006.01)
 F04C 29/00(2006.01)
F04C 2/06(2006.01)
(84) Designated Contracting States:
AL 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 RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 28.07.2011 KR 20110075023
14.03.2012 KR 20120026107

(71) Applicant: Philtec Co., Ltd.
Chungcheongnam-Do (KR)

(72) Inventor:
  • Rha, Phil Chan
    Chungcheongnam-Do (KR)

(74) Representative: Betten & Resch 
Theatinerstrasse 8
80333 München
80333 München (DE)

   


(54) Pump


(57) A double action rotary pump forcibly delivers fluid such as liquid or gas. A transmission unit operates at uniform or non-uniform angular speeds using driving force transmitted from a motor via a power transmission system. An operating unit is provided in series with the transmission unit. A piston of the operating unit has a pair of heads, which rotate at non-uniform angular speeds in a counteracting fashion while maintaining the distance between shafts, and divides the spaces inside cylinders. The volumes of the divided spaces of the cylinders are repeatedly and alternately contracted and expanded in response to the rotation of the piston, so that the cylinders counteractively and continuously perform intake and exhaust operations, thereby forcibly delivering fluid. The structure of the power transmission system is improved such that the sum of flow rates that are pumped by the piston at a predetermined time point stays uniform.







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Search report