(19)
(11) EP 0 894 539 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
04.08.1999 Bulletin 1999/31

(43) Date of publication A2:
03.02.1999 Bulletin 1999/05

(21) Application number: 98114798.6

(22) Date of filing: 03.09.1992
(51) International Patent Classification (IPC)6: B05B 11/00
(84) Designated Contracting States:
CH DE FR GB IT LI NL

(62) Application number of the earlier application in accordance with Art. 76 EPC:
92918710.2 / 0616127

(71) Applicant: YOSHINO KOGYOSHO CO., LTD.
Tokyo (JP)

(72) Inventor:
  • Tasaki, Takaharu
    Koto-Ku, Tokyo 136 (JP)

(74) Representative: Crouch, David John et al
Bromhead & Co. 19 Buckingham Street
London WC2N 6EF
London WC2N 6EF (GB)

 
Remarks:
This application was filed on 06 - 08 - 1998 as a divisional application to the application mentioned under INID code 62.
 


(54) Piston of pump section of trigger-type liquid dispenser


(57) A piston (101, 105) of a pump section (E) of a trigger-type liquid dispenser having integrally formed annular skirts (102, 104, 106, 108) extending respectively at an approach end and at a stroke end of the piston and held in close contact with an inner wall surface of a cylinder (H) of the pump section. Said annular skirt (106, 108) extending at the stroke end of the piston is provided with at least one notched section (109, 110) located at a position corresponding to said air intake port (23) provided on the peripheral wall of said cylinder. Thus, air is securely and surely introduced into the liquid container even if the trigger is moved repeatedly by only a short stroke in order to exhaust liquid at a reduced rate.






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