Patent ID: 6176491
Filing Date: 2001-01-23
Classification: B62D

Abstract:
A sealing device comprising:mechanical parts;a pin having a pivoting axis, said pin connecting two of said mechanical parts wherein said pin connects said mechanical parts so as to be pivotable about the pivoting axis of said pin and to form an annular chamber for a lubricant which is delimited by an axial sealing surface and a radial sealing surface of one of said mechanical parts; an annular seal and a spacer element for the mechanical parts which are coaxially housed in said chamber; the annular seal surrounding the spacer element and said spacer element surrounding the pin;the annular seal comprising a rigid annular sealing element and a resilient annular element, the annular sealing element having a substantially radial portion and a substantially cylindrical portion to which said substantially radial portion is joined so as to form a substantially J-shaped or L-shaped cross-section delimited internally by a substantially conical inclined surface;the resilient annular element comprising an external radial surface which engages the radial sealing surface of the chamber and externally engages the annular sealing element; said resilient annular element pressing the annular sealing element, in a sealed position, against a radial sealing surface of said one of the two mechanical parts, the substantially cylindrical portion of the annular sealing element being delimited by an internal cylindrical surface of said annular sealing element;the substantially radial portion of the annular sealing element provides a sealing action, comprising a material having a predetermined hardness factor, said substantially radial portion being delimited externally by a cylindrical surface extending at right angles and having at a front portion thereof at least one sealing surface;said substantially cylindrical portion of said annular sealing element being joined to said substantially radial portion along a joining plane disposed at an angle with respect to the axis of said pin;said resilient annular element comprising a first annular portion having a cross-section in the form of a bulge and a second annular portion having a cross-section in the form of a boss, in which the first annular portion is delimited by a first annular contact surface which, when said annular seal is assembled, forms with respect to the incident joining plane an angle of between 0.degree. and 30.degree..