(19)
(11) EP 0 833 054 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
21.07.1999 Bulletin 1999/29

(43) Date of publication A2:
01.04.1998 Bulletin 1998/14

(21) Application number: 97307552.6

(22) Date of filing: 26.09.1997
(51) International Patent Classification (IPC)6: F04B 39/00
(84) Designated Contracting States:
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV RO SI

(30) Priority: 26.09.1996 JP 275607/96
26.09.1996 JP 275608/96
26.09.1996 JP 275609/96
30.09.1996 JP 278842/96

(71) Applicant: Teikoku Piston Ring Co., LTd.
Chuo-ku, Tokyo 103 (JP)

(72) Inventors:
  • Hama, Fujio
    Okaya-shi Nagano-ken 394 (JP)
  • Osaka, Harunobu
    Okaya-shi Nagano-ken 394 (JP)
  • Sakurai, Taketoshi
    Okata-shi Nagano-ken 394 (JP)

(74) Representative: Davies, Christopher Robert 
Frank B. Dehn & Co., European Patent Attorneys, 179 Queen Victoria Street
London EC4V 4EL
London EC4V 4EL (GB)

   


(54) Compressor


(57) In an air compressor of this invention, a piston (20) connects to a crankshaft (26) by means of a cross slider crank mechanism and reciprocates in a cylinder (1). Lubricating oil is supplied to a cooling chamber (60) in the piston by way of oil supply passages (44,45,46,48). Lubricating oil is supplied to the sliding surfaces of the slider (30) and slider frame (32) by way of a crankshaft oil supply passage (51) and a slider oil hole (52). The interior of the cylinder (1) and interior of a crankcase (25) are sealed with an oil seal (56) at the middle section of a piston rod (23). A sliding surface of the slider frame (32) which contacts the slider (30) is chromium plated. The compressor also comprises a suction valve (9) and a discharge valve (12) formed in the cylinder head (2), and additionally a further suction valve (93) and a discharge valve (98) formed in the cylinder base (90) to achieve two suction and discharge strokes per cycle.






Search report