English to French Law/Patents Mechanics / Mech Engineering mécanique

The present disclosure relates to track chains that use pins and bushings to hold the track chain together while still allowing one track chain member such as a track link or track pad to rotate relative to another track fink or track pad. Specifically, the present disclosure relates to a pin and bushing retention design used to hold track chain members such as track shoes, track pads or track links together, helping to prevent the pin or bushing from falling out of the track chain members.

characterised in that the first lug (208) includes a first bushing retention shelf (212) disposed in the first bore (210), the second lug (214) and includes a second bushing retention shelf (218) disposed in the second bore (216)
and the third lug (222) includes a third bushing retention shelf (226) disposed in
the third bore (224), the first bore (210), the second bore (216) and third bores
(224) have cylindrical configurations defining a first radial direction (R210) of
the first bore (210), a second radial direction (R216) of the second bore (216),
and a third radial direction (R224) of the third bore (224), and the third bushing
retention shelf (226) extends radially the same amount (RD226, RD218) as the
second bushing retention shelf (218) while the first bushing retention shelf (212)
extends further radially (RD212) than the second or the third bushing retention
shelves (218, 226).