Dust seal for sliding type bush

A sliding type bush comprising:

• an outer stationary section;
• an inner movable section disposed concentrically with said stationary section and movable relative to said stationary section;
• a dust seal for providing a seal between said stationary and movable sections;
• means for limiting axial movement of said movable section relative to said stationary section, said axial movement limiting means including a radially outward extending flange of said movable section and a radially inward extending flange of said stationary section for abutment upon each other;
• said dust seal having a fitting portion fitted in said stationary section, an annular seal lip portion in sliding contact with an outer circumferential surface of said movable section and an annular flexible portion interconnecting said fitting portion and said seal lip portion;
• said dust seal further having at a junction between said flexible portion and said seal lip portion an annular projection for contact with said radially outward extending flange and said outer circumferential surface of said movable section;
• and
• said fitting portion having an outer end located more remotedly from said radially outward extending flange than an inner end, and said seal lip portion having an inner end located nearer to said flange than an outer end, said flexible portion extending curvedly between said outer end of said fitting portion and said inner end of said seal lip portion for allowing axial movement of said movable section relative to said stationary section while holding said annular projection in contact with said radially outward extending flange and said outer circumferential surface of said movable section under a bias of said flexible portion.

A sliding type bush comprising:

• an outer stationary section;
• an inner movable section disposed concentrically with said stationary section and movable relative to said stationary section;
• a dust seal for providing a seal between said stationary and movable sections;
• means for limiting axial movement of said movable section relative to said stationary section, said axial movement limiting means including a radially outward extending flange of said movable section and a radially inward extending flange of said stationary section for abutment upon each other;
• said dust seal having an annular fitting portion fitted in said stationary section, an annular seal lip portion in sliding contact with an outer circumferential surface of said movable section and an annular flexible portion interconnecting said fitting portion and said seal lip portion;
• said dust seal further having at a junction between said flexible portion and said lip portion an annular projection for contact with said radially outward extending flange and said outer circumferential surface of said movable section;
• said fitting portion having an outer end located more remote from said radially outward extending flange than an inner end, and said seal lip portion having an inner end located nearer to said radially outward extending flange than an outer end, said flexible portion extending curvedly between said outer end of said fitting portion and said inner end of said seal lip portion for allowing axial movement of said movable section relative to said stationary section while holding said annular projection in contact with said radially outward extending flange and said outer circumferential surface of said movable section under a bias of said flexible portion;
• and
• said dust seal further having an outer peripheral ring for fixing said fitting portion to said stationary section, said outer peripheral ring axially extending generally in parallel to an inner periphery of said fitting portion to have opposite axial ends, one of which terminates at a junction between said outer end of said fitting portion and said flexible portion, and the other of which terminates at said inner end of said fitting portion.