Birrana Engineering Pty Ltd

Peter John French

Michael David Nunn

Paul Van De Loo

A hitch assembly for connecting a front endof a low-loader trailer to a tow vehicleis disclosed. The hitch assembly includes: a first mountlocated at the front endof the trailer; a second mountlongitudinally spaced towards the rear end of the trailer from the first mounta gooseneck framehaving a front end and a rear end, the front end connectable to the tow vehiclea latch connectableto the front endof the trailer by engagement with the first and second mountsandthe latchpivotally connected to the rear end of the gooseneck frameand a means for rotating the latchwith respect to the gooseneck frameThe assembly is such that in use, the front end of the traileris liftable by the action of a force couple imparted entirely through the latchto the first and second mountsandThe pivotal connection between the latch and the gooseneck frame is positioned on the gooseneck such that, in use, rotation of the latchto lift the front endof the trailer, moves the trailer forwards with respect to the rear end of the gooseneck.

Detachable gooseneck trailer hitch

A modular front loadable low loader trailer for transporting large vehicles is disclosed. The trailer includes: a rear axle module for supporting ground engaging wheels; a rear cross-member module removably connected to the rear axle module ; a front cross-member module ; and a pair of deck modules and , each removably connected between the front and rear cross-member modules and . Each of the modules are separable for transport. Pin joints are provided between adjacent modules. The pin joints include interleaved plates held together by removable transverse pins . In an alternative embodiment, the rear cross member is permanently connected to the axle module.

Low loader trailer

This invention relates to hydraulic suspension systems and in particular to vehicle oleopneumatic suspension systems employing sliding pillar struts. There is provided a suspension system for a vehicle comprising a plurality of suspension struts, each mounted between a vehicle body and a wheel assembly, each including a cylinder having a closed end and an inner bore; a piston rod slideable within the inner bore having a proximal end which terminates within the inner bore and a distal end which extends from the inner bore. Between the inner bore and the piston rod there is mounted an oil seal which seals a strut volume. A hydrostatic bearing is mounted within and vents into the strut volume. A hydraulic circuit and associated control system is adapted to control flow of hydraulic fluid between the strut volume and a reservoir, thereby providing control of at least the time-averaged axial position of the piston rod relative to its corresponding inner bore.

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College Park, Australia

Peter John French