초록 ▼

A piston is slidably fitted in a cylinder for dividing the interior of the cylinder into upper and lower cylinder chambers. The upper cylinder chamber communicates with the lower cylinder chamber through a check valve. The lower cylinder chamber communicates with a reservoir through a check valve. T

A piston is slidably fitted in a cylinder for dividing the interior of the cylinder into upper and lower cylinder chambers. The upper cylinder chamber communicates with the lower cylinder chamber through a check valve. The lower cylinder chamber communicates with a reservoir through a check valve. The upper cylinder chamber communicates with the lower cylinder chamber through an extending side damping valve. The lower cylinder chamber communicates with the reservoir through a contracting side damping valve. A piston rod is connected to the piston. When the piston rod is in an extending stroke, a damping force is generated by the extending side damping valve. When the piston rod is in a compressing stroke, a damping force is generated by the contracting side damping valve. The reservoir includes a connecting hole having an opening. A baffle plate is provided within the reservoir and above the opening of the connecting hole. Arrangement of the baffle plate above the opening of the connecting hole defines an entrance portion through which hydraulic fluid flows from the connecting hole to the reservoir. The cross sectional flow area of the entrance portion is gradually expanded, thereby decreasing the flow velocity of the hydraulic fluid to restrain generation of eddies to prevent cavitation and aeration.

대표청구항 ▼

[ What is claimed is:] [9.] A hydraulic shock absorber comprising:a cylinder containing hydraulic fluid sealed therein;a reservoir containing hydraulic fluid and gas sealed therein;a piston slidably fitted in said cylinder for dividing the interior of said cylinder into two cylinder chambers;a pisto

[ What is claimed is:] [9.] A hydraulic shock absorber comprising:a cylinder containing hydraulic fluid sealed therein;a reservoir containing hydraulic fluid and gas sealed therein;a piston slidably fitted in said cylinder for dividing the interior of said cylinder into two cylinder chambers;a piston rod including one end connected to said piston and an opposite end extending out of said cylinder;a first hydraulic fluid passage communicating between said two cylinder chambers;a second hydraulic fluid passage communicating between one of said two cylinder chambers and said reservoir; andmeans for controlling flow of said hydraulic fluid in said first and second hydraulic fluid passages caused by the stroke of said piston rod to generate a damping force; anda cylindrical baffle provided around the cylinder within the reservoir for gradually decreasing the flow velocity of said hydraulic fluid flowing from said second hydraulic fluid passage into said reservoir.