Land vehicles: bodies and tops – Bodies – Door or window with specified vehicle feature
Reexamination Certificate
2005-06-21
2005-06-21
Coletta, Lori L. (Department: 3612)
Land vehicles: bodies and tops
Bodies
Door or window with specified vehicle feature
C296S187120
Reexamination Certificate
active
06908141
ABSTRACT:
A structural member usable for a car capable of demonstrating excellent flexural strength and absorbed energy performance and, moreover, capable of realizing weight reduction and is a structural member for a car being formed with a high-tensile steel pipe having a material property of not less than 1,400 MPa in tensile strength and not less than 5% in elongation. The structural member has a closed section structure which is provided as the configuration of the cross section perpendicular to the direction of the longitudinal axis. The cross-sectional configuration satisfies the following expression when a is defined as the maximum length of said cross-sectional configuration in the longitudinal direction, when b is defined as the maximum length thereof in the direction perpendicular to said direction, when L is defined as the circumferential length thereof, and when t is defined as the wall thickness of the steel pipe,in-line-formulae description="In-line Formulae" end="lead"?0.65≦b/a≦0.75,in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?0.014≦t/L≦0.020in-line-formulae description="In-line Formulae" end="tail"?and preferably, the structural member is disposed so that the longitudinal direction of the cross-sectional configuration of the structural member coincides with the direction of the collision of a car body when the structural member is attached to the car body.
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Doi Hiroyuki
Kawase Masanobu
Motoyoshi Takashi
Takachi Tsutomu
Yamada Nobuyasu
Baker & Botts LLP
Coletta Lori L.
Nippon Steel Corporation
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