Fifth wheel

Details Fifth wheel Fifth wheel

B - Operations, Transporting

62

D

280/115

B62D 53/08 (2006.01)

Patent

CA 1236864

ABSTRACT OF THE DISCLOSURE FIFTH WHEEL A fifth wheel assembly (10) comprising a lower support structure (12) adapted to be mounted on the chassis of a prime mover and an upper support plate (13) upon which a trailer is to be supported, and between which a cam operated linkage mechanism is incorporated which has a pair of spaced apart main link assemblies (14) pivotally attached at one end (19) to the lower support structure and pivotally attached adjacent their other ends (18) to the upper support plate. Cam members (15) are pivotally supported on the link assemblies with their cam surfaces in contact with the lower support structure, whereby rotation of the cam members pivots said link assemblies upwardly about their pivotal connections to said lower support structure to thereby raise the upper support plate attached to the other ends of said link assemblies. A pair of spaced apart strut assemblies (20) are also provided pivotally connected at one end (21) to respective ones of said main link assemblies and detachably connected at their other ends, to the lower support structure via a pin (28) extending through a number of alternative arrangements of aligned holes (23, 24, 25, 26, 27), and such as to hold said upper support plate relative to said lower support structure in one of a number of alternative positions.

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