Endless track for tandem wheel lorry trailer - has truncated pyramid-shaped inner cams to grip between twin tyres and provide increased traction (NL 17.10.78)

摘要

A twin rear axled lorry or trailer can be provided with endless tracks for use on soft ground. The endless track is of suitably reinforced plastic or rubber. The track may be of one piece or otherwise and have a minimum thickness of 10mm. and a width of 500mm. The tandem road wheels are aligned by hydraulic suspension arms to maintain a distance between the leading and trailing wheel which corresponds to 10mm for each meter of wheel diameter. The endless track has inner cam projections (72) which grip between the twin wheels to provide increased traction. The cams are truncated pyramid shapes and spaced at distance of 100mm from each other. The outer track surface has equally spaced cross ribs (73) which face the cam projections.