Patent ID: 8113597

Claim:
Track joint seal system comprising a pin ( 43 ) having, at each end, a first track link ( 41 ) rotatably coupled to said pin ( 43 ) by means of interposition of a bushing ( 49 ) and an end element ( 42 ) engaged at the end of said pin ( 43 ), said end element ( 42 ) comprising an annular seat ( 57 ) housing a seal group ( 56 ) cooperating with said bushing to make the sealing of the joint, wherein at each end of said bushing ( 49 ) an annular head seat ( 58 ) is made, provided for housing a bushing insert ( 53 ) provided with an abutment surface ( 48 ) destined to be in contact with a seal portion ( 47 ) of the seal group ( 56 ), said bushing insert ( 53 ) comprising a rigid insert ( 52 ) circumferentially positioned in the annular head seat ( 58 ) and an elastic ring ( 51 ) concentric to and superimposed on the rigid insert ( 52 ) and destined to circumferentially contact the annular head seat ( 58 ) in order to generate the necessary compression thrust on the rigid insert ( 52 ), said elastic ring ( 51 ) being made either integral or non-integral with the rigid insert ( 52 ) to support the rigid insert ( 52 ) in static seal coupling with the annular head seat ( 58 ), and wherein said rigid insert ( 52 ) has a substantially “L” shaped section designed to create, on one of its sides, the abutment surface ( 48 ) and on the other side of the “L” shaped section, a housing ( 60 ) for the elastic ring ( 51 ) when said elastic ring ( 51 ) is made non-integral with the rigid insert ( 52 ).