(19)
(11)EP 1 092 610 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
11.12.2002 Bulletin 2002/50

(43)Date of publication A2:
18.04.2001 Bulletin 2001/16

(21)Application number: 00122187.8

(22)Date of filing:  12.10.2000
(51)Int. Cl.7B62D 3/12, B21K 1/76
(84)Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30)Priority: 14.10.1999 JP 29292799

(71)Applicants:
  • TOYOTA JIDOSHA KABUSHIKI KAISHA
    Aichi-ken 471-8571 (JP)
  • TRW Automotive Japan Co. Ltd.
    Kasugai-shi, Aichi-ken,486-0901 (JP)

(72)Inventors:
  • Fujii, Tomomi
    Toyota-shi, Aichi-ken, 471-8571 (JP)
  • Akiyama, Kazuhiro
    Toyota-shi, Aichi-ken, 471-8571 (JP)
  • Ozeki, Keita
    -cho, Kasugai-shi, Aichi-ken, 486-0901 (JP)

(74)Representative: Leson, Thomas Johannes Alois, Dipl.-Ing. et al
Patentanwälte Tiedtke-Bühling-Kinne & Partner, Bavariaring 4
80336 München
80336 München (DE)

  


(54)Rack bar and production method for the same


(57) A rack bar (10) whose rack teeth (12a) are formed by disposing a die having a rack teeth-forming portion on an outer peripheral surface of a tubular member, and by inserting a pressing member into the tubular member. The tooth height of the rack teeth (12a) is at most 1.5 times the teeth bottom wall thickness and the helical angle is less than or equal to 20°.