Wenderoth, Lind & Ponack, L.L.P.
Tube and shock absorber
A tube having sealing ring grooves formed by a sequential rotational process and a shock absorber including the tube, in which durability of a sealing ring fitted in each of the sealing ring grooves is enhanced. An inclination angle (θ1) formed with respect to a plane (PL1) perpendicular to an axis of a separator tube by a side surface of the sealing ring groove, which is located on an opening end side of the separator tube, is set to 8° or more. With this, a maximum tensile stress to be applied to an O-ring can be reduced to be smaller than a maximum tensile stress in a case of using a backup ring. As a result, the durability of the O-ring can be set equivalent to or enhanced to be higher than durability in the case of using the backup ring.
HITACHI AUTOMOTIVE SYSTEMS, LTD.
F F B F B B B F F
F16J F16F B21H F16F B60G B21D B60G F16F F16F
inventional inventional inventional inventional inventional inventional inventional inventional inventional
Mikio Makoto
Yamashita Nishimura