(19)
(11) EP 1 236 955 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
27.11.2002 Bulletin 2002/48

(43) Date of publication A2:
04.09.2002 Bulletin 2002/36

(21) Application number: 02090078.3

(22) Date of filing: 27.02.2002
(51) International Patent Classification (IPC)7: F23D 3/26
(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: 28.02.2001 JP 2001054157

(71) Applicant: TOYOTOMI CO., LTD.
Nagoya-shi, Aichi-ken (JP)

(72) Inventors:
  • Yamada, Toshihiko
    Anjyo-shi, Aichi-ken (JP)
  • Asano, Shozo
    Nagoya-shi, Aichi-ken (JP)

(74) Representative: Hoffmann, Klaus-Dieter, Dipl.-Ing. 
Kurfürstendamm 40-41
10719 Berlin
10719 Berlin (DE)

   


(54) Disengagement linkage mechanism of extinction device for burner


(57) An extinction device for a burner is so constructed that precision of the operation of the extinction device can be heightened even when a shape memory coiled spring (141) is used as a temperatura sensor.
An extinction device comprises a swinging linkage (139) which is held free to rotate around a rotation center (145), a shape memory coiled spring (141) arranged, in an compressed condition, between the swinging linkage (139) and a second base (145b) provided on a frame (101) to generate a spring force to rotate the swinging linkage (139) in one direction around a rotation center (145), and a bias spring (143) arranged, in an expanded condition, between the swinging linkage (139) and a second fixed portion of the frame (101) to generate a spring force to rotate the swinging linkage (139) in the other direction around the rotation center (145). Such a spring is used for a shape memory coiled spring (141). The coiled spring (141) has a characteristic to give, to the swinging linkage, a torque larger than a torque given a spring force of a bias spring 143, when the circumference temperature exceeds a predetermined level.






Search report