Patent ID: 9285006
Filing Date: 2016-03-15
CPC Classification: F16F

Claim Text:
1. A tube-type shock absorber comprising: a circular cylindrical cylinder part having a working fluid sealed therein; a piston movable in the cylinder part; a piston rod connected to the piston and extended to an outside of the cylinder part; a circular cylindrical casing joined to a side surface portion of the cylinder part; and a damping force generating device housed in the casing to generate a damping force by controlling a flow of hydraulic fluid induced by movement of the piston, wherein the casing is in a shape of a circular cylinder with a bottom, the bottom having an opening and an inner surface including a planar portion around the opening, the bottom having a joint surface that is joined to the cylinder part, the joint surface being curved along an outer peripheral surface of the cylinder part, wherein the bottom of the casing has the inner surface and the joint surface integrally formed by forging, wherein the damping force generating device is provided on the inner surface of the bottom of the casing, wherein a recess is formed on the inner surface of the bottom of the casing, the recess being concaved from the inner surface and extending to the opening in a radial direction, the recess being integrally formed with the bottom by forging, and wherein a flow path of the hydraulic fluid communicates between the damping force generating device and the opening by the recess.