(19)
(11) EP 1 201 805 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
07.05.2003 Bulletin 2003/19

(43) Date of publication A2:
02.05.2002 Bulletin 2002/18

(21) Application number: 01125328.3

(22) Date of filing: 26.10.2001
(51) International Patent Classification (IPC)7: D03D 47/30, F16K 5/00, F16K 3/24
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 30.10.2000 JP 2000329890
23.04.2001 JP 2001123746

(71) Applicant: Kabushiki Kaisha Toyota Jidoshokki
Kariya-shi, Aichi-ken (JP)

(72) Inventors:
  • Ishikawa, Hirohiko
    Kariya-shi, Aichi-ken (JP)
  • Shiraki, Masao
    Kariya-shi, Aichi-ken (JP)
  • Ito, Daisuke
    Kariya-shi, Aichi-ken (JP)

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

   


(54) Throttle valve and weft insertion apparatus in a jet loom provided with the same


(57) There is provided a high-precision throttle valve (60) that has a small loss of pressure and is capable of easily regulating a flow rate. Furthermore, there is provided a weft insertion apparatus in a jet loom provided with a throttle valve having such characteristics. The throttle valve of the present invention includes a valve hole (63) bored so as to be orthogonal to a fluid channel (62) and a valve body (64) inserted into the valve hole (63) so as to be rotatable about an axial center, in which a concave engraved portion whose depth is continuously varied in a circumferential direction is formed on a circumferential surface of the valve body (64) at a position corresponding to an opening of the fluid channel (62). Furthermore, a weft insertion apparatus in a jet loom of the present invention includes the throttle valve, and the fluid channel connects a compressed air source regulated for pressure in a jet loom to a nozzle for injecting the compressed air.






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