Patent ID: 6270064
Filing Date: 2001-08-07
Classification: B60G

Abstract:
A hydraulic shock absorber comprising:a cylinder having a hydraulic fluid sealably contained therein;an outer cylinder provided so as to cover an outer circumferential surface of said cylinder, said outer cylinder having opposite ends, with one of the opposite ends being closed;a spring seat secured to said outer cylinder;a piston slidably disposed within said cylinder so as to divide an interior of said cylinder into two cylinder chambers;a piston rod having a first end connected to said piston and a second end extending outside of said cylinder and outside of said outer cylinder through the other of the opposite ends of said outer cylinder; anda damping force generating mechanism for generating a damping force by controlling a flow of the hydraulic fluid that is generated due to a sliding motion of said piston within said cylinder,said hydraulic shock absorber being adapted to extend through a coil spring when in use while said spring seat supports an end of the coil spring,wherein said outer cylinder has an expanded portion that is located on an opposite side of said spring seat relative to the closed end of said outer cylinder so that the expanded portion is located in an area surrounded by the coil spring, and the expanded portion expands outwardly toward the coil spring,wherein a first chamber, communicating with the cylinder chambers, is defined between the expanded portion of said outer cylinder and said cylinder.