Jack assembly
AssigneeBos Fabrication Engineering Services Pty Ltd
InventorJurgen Van Den Bos
Life of this patent
Estimating the term…
Abstract
A jack assembly including a telescopic column driven via a gear box, wherein: the gear box is coupled to a rotary input of a drive mechanism that extends and retracts the column; the gear box has only a single input gear and a single output gear that is coupled to the drive mechanism; and the input gear has a connector adapted to be engaged and driven by a portable, hand-held power tool. The invention also relates to a jack assembly with a gear box for use as a jockey wheel for attachment to a towed vehicle, to raise and lower a draw bar of the vehicle.
Claims32
A jack assembly including:
- a telescopic column with a threaded rod that is rotated to extend and retract the column;
- a gear box with an input and output gear;
- and
- a gear module that houses first and second bevel gears:
- wherein
- the gear module includes a housing with a rotary input at a first end that is fixed to the first bevel gear, an opening in a base of the housing through which a neck of the second bevel gear is accessed and a side passage that aligns with a lateral hole in a neck of the second bevel gear;
- and wherein
- the gear module is provided as a pre-assembled unit mounted into the column and a head of the threaded rod is mounted into the module by being inserted into the neck and fixed to the second bevel gear by a pin that extends through the hole and into a corresponding lateral bore in the head of the threaded rod, and the output gear of the gearbox is coupled to the rotary input whereby rotational drive applied to an input gear of the gearbox is translated into rotation of the threaded rod.
A jockey wheel including a telescopic column for attachment to a towed vehicle, to raise and lower a draw bar of the vehicle, wherein the column includes:
- a drive mechanism with a rotary input that rotates to cause the column to extend or retract;
- and
- a gear box with a rotary connector adapted to connect to and be driven by a power tool, wherein the gear box drives the input so as to provide for geared operation of the drive mechanism.
Dependencies are inferred from the claim text.