(19)
(11) EP 1 571 336 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
04.01.2006 Bulletin 2006/01

(43) Date of publication A2:
07.09.2005 Bulletin 2005/36

(21) Application number: 05004432.0

(22) Date of filing: 01.03.2005
(51) International Patent Classification (IPC): 
F04B 27/10(2006.01)
F04B 39/08(2006.01)
 F04B 39/12(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR LV MK YU

(30) Priority: 03.03.2004 JP 2004059466

(71) Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
Kariya-shi, Aichi-ken 448-8671 (JP)

(72) Inventors:
  • Inoue, Yoshinori
    Kariya-shi Aichi-ken (JP)
  • Kawamura, Hisato
    Kariya-shi Aichi-ken (JP)
  • Kawachi, Shigeki
    Kariya-shi Aichi-ken (JP)
  • Masuda, Masanori
    Kariya-shi Aichi-ken (JP)
  • Kimoto, Yoshio
    Kariya-shi Aichi-ken (JP)
  • Hibino, Sokichi
    Kariya-shi Aichi-ken (JP)
  • Hayashi, Shiro
    Kariya-shi Aichi-ken (JP)
  • Morishita, Atsuyuki
    Kariya-shi Aichi-ken (JP)
  • Murakami, Tomohiro
    Kariya-shi Aichi-ken (JP)

(74) Representative: HOFFMANN EITLE 
Patent- und Rechtsanwälte Arabellastrasse 4
81925 München
81925 München (DE)

   


(54) Piston compressor


(57) A piston compressor includes a rotary valve (35) having a suction guide hole. A plurality of introducing passages are formed in a cylinder block to connect compression chambers to the rotary valve (35). The inner circumferential surface of each cylinder bore has a suction auxiliary recess (61), which is connected to the outlet of the corresponding introducing passage in the circumferential direction of the cylinder bore at the end of the cylinder bore facing a valve assembly. Therefore, the compressor reduces suction resistance of gas at the beginning of the suction stroke without enlarging introducing passages formed in the cylinder block.







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