Static structures (e.g. – buildings) – With piercing or expanding earth anchor
Patent
1998-05-20
2000-04-18
Callo, Laura A.
Static structures (e.g., buildings)
With piercing or expanding earth anchor
52157, 52165, 5216913, 52298, 248165, 248514, 248515, 248550, 248523, 248530, 403DIG8, F02C 3100
Patent
active
060500344
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an anchoring device for a pole- or post-like object.
When erecting poles, stakes or posts, for instance when putting up a fence, erecting a sign-post or the like there is always arising the difficulty of maintaining the stake or post in the exactly vertical position, if possible. The vertical alignment can be effected, for instance, by checking the vertical alignment by means of a spirit level or a vertical line and possibly correcting it when the pole-, stake- or post-like object is fixed or anchored in the ground, for instance, by driving it into the ground or ease imbedding it in concrete. This is difficult and time-consuming, because, for instance, when driving a stake or post into the ground the driving operation has to be repeatedly interrupted in order to check and possibly correct the alignment. When imbedding a pole or post in concrete the exactly vertical erection of the same can be subsequently corrected without difficulty when the concrete has not yet set, then, however, means have to be applied to maintain this exactly vertical position until the concrete has set so that this vertical alignment cannot change any more by itself; i.e. the pole or post has to be laterally supported or braced, for example.
Apart from driving or digging in or else imbedding a pole or post in concrete, it is known to use fastening devices which can be anchored in the ground and which then support the post- or pole-like object at their upper free end. The fastening device adapted to be anchored in the ground comprises, for instance, a worm or screw which is turned into the ground like a corkscrew and then the post or pole is screwed to this fastening device or inserted in the same. In DE-GM 93 13 258 an example hereof is described. It is further known to design the post- or pole-like object and the fastening device adapted to be anchored in the ground like a corkscrew in one piece so that the object includes the fastening device at one of its free ends which is then screwed into the ground and anchored therein.
With these two methods or these possibilities of erecting a pole or post, too, substantially the same problems regarding the vertical arrangement of the post or pole are arising as when driving the same in or imbedding it in concrete. Instead of the driving operation, in this case the turning of the fastening device into the ground must be repeatedly interrupted to ensure the later vertical alignment of the post or pole by appropriate measuring and correcting operations, if necessary.
Therefore, in the past already adjusting mechanisms have been disposed on the fastening devices to allow an adjustment of the position of the object with respect to the fastening device. For instance, DE-GM 88 09 142 shows the possibility of the vertical adjustment of a post with respect to a ground plate by means of a ball-and-socket joint. U.S. Pat. No. 4,199,908 enables the alignment of a post or pole in vertical direction due to oblong recesses in a support member.
DE-GM 88 09 142 has the essential constructional drawback, however, that when tightening the ball socket encasing the ball head hardened projections formed in the socket are intended to dig into the material of the ball head to ensure the position of the pole in addition by a positive locking. In practice this means that with a changing mounting position of the support, which requires a different position of the ball head with respect to the support, due to the ball head possibly deformed by the projections the same may no longer be safely held in the new position by the ball socket and has to be exchanged.
The adjusting device according to U.S. Pat. No. 4,199,908 permits only an adjustment in one plane. Moreover, it has constructional drawbacks in so far as for ensuring a correct functioning the bottom arm has to be anchored in such a depth in the concrete foundation that the bore in that case is aligned with the oblong hole of the support member, because otherwise the screw can no longer pass through these two bores in which the adjusting
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Callo Laura A.
Krinner Klaus
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