Patent ID: 6283259
Filing Date: 2001-09-04
Classification: F16F

Abstract:
A hydraulic shock absorber, comprising:an inner cylinder filled with working oil, said inner cylinder having an interior;an outer cylinder extending around said inner cylinder so as to define a reservoir therebetween;a piston slidably disposed within said inner cylinder so as to divide said interior of said inner cylinder into an upper cylinder chamber and a lower cylinder chamber;a piston rod having one end connected to said piston and the other end extending out of said inner cylinder;an oil passage communicated with said interior of said inner cylinder and adapted to allow the working oil to flow therethrough as said piston is moved;a tubular member disposed between said inner cylinder and said outer cylinder so as to define annular oil passages therebetween, said annular oil passages forming a part of said oil passage, and said tubular member including a port through which the working oil flows;a damper attached to said outer cylinder for controlling flow of the working oil through said oil passage so as to produce a damping resistance, wherein said outer cylinder includes an integral mounting projection having a substantially flat top surface on which said damper is secured;a sleeve for providing fluid communication between said oil passage and said damper, said sleeve having one end extending into said port of said tubular member and a flanged end opposite to said one end, wherein said flanged end of said sleeve extends outwardly from said outer cylinder and terminates above said top surface of said mounting projection;a first seal placed between said one end of said sleeve and said port of said tubular member for sealing between said sleeve and said port; anda second seal placed around said flanged end of said sleeve for sealing between said outer cylinder and said damper;wherein said second seal includes a first sealing element disposed between said flanged end of said sleeve and said second top surface of mounting projection, and a second sealing element disposed between said flanged end of said sleeve and said damper.