B - Operations – Transporting – 66 – F
Patent
B - Operations, Transporting
66
F
B66F 3/24 (2006.01) F15B 15/16 (2006.01)
Patent
CA 2110222
This invention provides a double acting hydraulic jack comprising a housing from which at least two pistons extend, each of said pistons being telescopic with respect to one another and with respect to the housing, and valve means between adjacent pistons, said valve means being such as to permit hydraulic fluid to pass from an outer piston into an inner piston to extend the inner piston relative to the outer piston and to restrict the back flow of hydraulic: fluid from the inner piston to the outer piston. The invention also provides A truck for transportation and positioning of a heavy equipment jack, said truck comprising a chassis having a transverse axis about which said chassis can rotate, means for movement of said truck associated with said axis, members projecting away from said chassis to receive trunnions fixed to said jack such that the centre line of said trunnions runs parallel to said chassis axis, and a frame pivotally mounted to said chassis at the end opposite said protecting members and extending away from said chassis, there being provided means to adjustably fix the angle between said frame and said chassis wherein said trunnion centre line is positioned relative to said axis so that downward movement of said handle rotates said chassis about said axis and raises said jack clear of the surface supporting said jack.
Oildrive Pty. Ltd.
Ridout & Maybee Llp
LandOfFree
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