Joints and connections – Interfitted members – Radially interposed shim or bushing
Patent
1994-01-10
1996-02-20
Dorner, Kenneth J.
Joints and connections
Interfitted members
Radially interposed shim or bushing
403367, 403225, 256DIG5, 40606, 248156, 52165, F16B 222
Patent
active
054924294
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a device for use in the erection of posts, for example road signs, fence posts and the like.
BACKGROUND OF THE INVENTION
Prior art arrangements for post erection usually entail the digging of an appropriately sized hole, the placement of a post therein and then filling in the hole with concrete to maintain the post in place. Of course, while the cement is drying the post needs to be continually supported. Furthermore, should the post be damaged and need to be replaced, it is necessary to break up the concrete in order to remove the damaged post and replace it with another, undamaged, one.
SUMMARY OF THE INVENTION
It is one object of the present invention to provide apparatus which provides a solid support for posts, which is relatively resistant to a casual vandal, yet enables their speedy erection.
It is another object of the invention to provide a device for use in erection of a pest which allows the post to be readily replaced.
In one aspect the present invention may be considered to provide a device for use in the erection of a post comprising a tubular body portion which is adapted to be firmly installed in a supporting stratum, e.g. the ground, and has an open end adapted to receive a post to be supported, and a resiliently deformable collar having an opening adapted to receive the post and the collar being adapted to be inserted within and engage with the tubular body portion, thus to retain a post inserted therein tight engagement.
The tubular body portion, and collar have generally similar cross-sectional shapes and are preferably circular in cross-section, although they may be of any desired cross-section shape, for example square, The relative dimensions of the body portions, collar and associated post are chosen to be such as permit the collar to be positioned between the tubular body portion and associated post interengaging with each thus to secure the post in the tubular body portion.
The collar is preferably made of a resiliently compressible polymeric material, for example polyurethane or rubber (natural or synthetic).
The tubular body portion is suitably made from metal, but can alternatively be made from any other sufficiently rigid material; in some cases carbon-fibre reinforced plastics material may be suitable. Where the body portion is to be driven into the ground it is important to select a material which can be rammed into the ground without significant damage and which will provide an adequate socket for an associated post.
Suitably, in this case, the tubular body portion provided with a closed or substantially closed end, which is suitably tapered or generally hemispherical shape or other shape suitable to aid penetration, thus to facilitate driving the body portion into the ground.
In another device in accordance with the invention the tubular body portion is adapted to be inserted in a preformed hole, and concreted in place.
The tubular body portion is preferably provided with means, e.g. outwardly projecting flange portions, militating against tilting of the body portion away from a desired orientation when installed, e.g. by a transverse load applied to the post. The body portion may be provided with means militating against rotation of the body portion about its lengthwise axis after it has been installed.
A device in accordance with the invention may comprise interlocking means at an outer surface of the collar and an inner surface of the tubular body portion, adapted to interlock with one another when the collar is properly inserted in the tubular body portion, thus to militate against removal of the collar from the body portion and/or rotation of the collar relative to the body portion. In one embodiment the interlocking means comprise a plurality of resiliently deformable outwardly protruding teeth on the collar and orifices in the body portion in which the teeth engage, in use. In another embodiment the interlocking means comprises one or more lengthwise grooves or recessed in the body port ion and one or more co-o
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Dorner Kenneth J.
Kim Harry C.
Poletech Systems Limited
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