Patent ID: 7219968

Claim:
A crawler system comprising a crawler ( 2 ) in which pairs of opposed right and left links ( 1 a ) ( 1 b ) are endlessly connected, each link having a first part on one end, a second part on the other end, and a solid third part connecting the first part and second part, wherein the first part at the one end of the pair of the right and left links ( 1 a ) ( 1 b ) is connected by a cylindrical connection part ( 3 ), the third parts thereof in the longitudinal direction are connected by an engaging part ( 4 ) which engages with a concave tooth ( 29 ) of concavo-convex teeth ( 28 ) of a crawler sprocket ( 27 ), the right and left links ( 1 a ) ( 1 b ) and engaging part ( 4 ) integrally molded as a unit, and the pairs of right and left links ( 1 a ) ( 1 b ) are endlessly connected by inserting connection pins ( 12 ) to the connection parts ( 3 ).