Patent ID: 6502539
Filing Date: 2003-01-07
Classification: F02F

Abstract:
An articulated piston construction for an internal combustion engine, comprising:a piston head having a ring belt portion and a pair of depending pin bosses having axially aligned bores for receiving a pin; a skirt formed separately from said head as an independent structure having axially aligned pin bores alignable with said pin bores of said pin bosses for receiving the pin therein to coupled said skirt in articulated manner to said head; and said skirt having a pair of outer thrust surfaces extending longitudinally between upper and lower ends of said skirt, each of said thrust surfaces having a longitudinal profile that is generally symmetrical about a central plane of said pin bores of said skirt, said profile including tapered upper and lower end regions and a central depressed region having a lowest valley point lying substantially in said plane of said pin bores, said profile providing a pair of peaked regions disposed in about equidistant spacing on either side of said plane.