Traversing hoists – Adjustable to transport or nonuse position
Reexamination Certificate
1999-03-15
2001-03-20
Olszewski, Robert P. (Department: 3652)
Traversing hoists
Adjustable to transport or nonuse position
C212S292000, C212S299000, C212S227000, C414S462000, C452S187000, C452S189000, C254S325000
Reexamination Certificate
active
06202868
ABSTRACT:
FIELD OF THE INVENTION
This invention is directed to a hoist and, in particular, to a hoist which is collapsible for storage.
BACKGROUND OF THE INVENTION
Sportsmen are required to field dress wild game animals. To obtain the best results when field dressing, it is important to remove the hide as quickly as possible, to allow the carcass to cool, and avoid contaminating the carcass with soil, grass etc. Thus, it is beneficial be able to suspend the carcass during field dressing.
Unfortunately most hoists are large and unwieldy preventing their transport to the field. Some collapsible hoists have been invented, but appear not to have become commercially accepted. In particular, prior foldable hoists have required the parts to be completely dismantled resulting in the loss of major parts and causing the assembly procedure to be complicated and time consuming. In addition, the folding procedures of other hoists results in tangles of hoist cables.
A collapsible hoist assembly is required which is safe and easy to use and which is collapsible to a convenient size without the use of special tools and/or without complicated mechanisms.
SUMMARY OF THE INVENTION
A collapsible hoist has been invented and is taught herein which provides for easy assembly for use and quick collapsing for storage. Assembly and collapsing can be accomplished without the use of tools or complicated mechanisms.
In accordance with a broad aspect of the present invention, there is provided a collapsible hoist comprising a support post; an upper boom connected by a pivotal connection to the support post and pivotally moveable relative to the support post between a collapsed position wherein the upper boom is positioned adjacent the support post and an extended position in which the upper boom extends away from the support post at a selected angle and a winch including a cable suspended from the upper boom for lifting a load, the pivotal connection including a pair of gusset plates retaining therebetween the upper boom such that the upper boom is slidable and pivotally moveable therebetween to permit pivotal movement of the upper boom, the gusset plates defining a locking notch for accepting a locking pin on the upper boom, the locking notch and locking pin formed to cooperate to resist forces exerted by the upper boom and tending to move the upper boom into the collapsed position.
In accordance with another broad aspect of the present invention, there is provided a collapsible field dressing hoist comprising a support post; an upper boom connected by a pivotal connection to the support post and pivotally moveable relative to the support post between a collapsed position wherein the upper boom is positioned adjacent the support post and an extended position in which the upper boom extends away from the support post at a selected angle, a winch including a cable suspended from the upper boom for lifting a load and a spreader bar for supporting a carcass, the pivotal connection including a pair of gusset plates retaining therebetween the upper boom such that the upper boom is slidable and pivotally moveable therebetween to permit pivotal movement of the upper boom, the gusset plates defining a locking notch for accepting a locking pin on the upper boom, the locking notch and locking pin formed to cooperate to resist forces exerted by the upper boom and tending to move the upper boom into the collapsed position.
The locking notch is preferably formed as a locking notch formed in the edge of each gusset plate and aligned between the two gusset plates and the lock pin is formed as a pair of pins each formed to seat in the notch of one of the gusset plates and to be formed to be driven into engagement with the locking notch by the force of the upper boom tending to move into collapsed position. The force is caused by the weight of the upper boom and the weight of any load suspended from the upper boom.
In one embodiment, the gusset plates retain the upper boom by use of a pair of slots aligned between the gusset plates and formed to retain a pair of aligned pins extending from the upper boom. The slots are formed to permit the upper boom to move from the collapsed position to the extended position while remaining secured between the gusset plates. Preferably, a recess is formed in each slot for accepting the pins when the locking pin is engaged in the locking notch.
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Johnson R. B.
Jones Bennett
Olszewski Robert P.
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