Supports – Staff type – Stand or base
Patent
1994-08-23
1996-07-02
Ramirez, Ramon O.
Supports
Staff type
Stand or base
343882, F16M 1300
Patent
active
055314198
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a mast base, especially for a temporarily erected mast.
Within the telecommunication field, it is often required to erect antenna masts temporarily for shorter or longer periods of time. Since the masts in question may have a height of several tenths of meters, for instance 30 to 40 meters, although the masts are intended to be erected only temporarily, it is necessary to place them upon a highly stable base. For this reason, even in connection with temporarily erected masts, it has been common practice to utilize a stationary foundation, formed by a mast base which is firmly anchored in the ground and which is of a kind similar to that utilized for permanently erected masts. However, a mast base, which is firmly anchored in the ground, is unfavourable in several respects. Firstly, both the construction as well as a subsequent removal of such a mast base is very time-consuming and costly. Additionally, the use of such a mast base implies a substantial penetration into the ground, which is totally unacceptable in certain environmentally sensitive regions, such as in mountain regions or in costal regions where the rock is exposed. In order to avoid the above disadvantages, it has been proposed to utilize a transport vehicle of special design as a mast base for a temporarily erected mast. However, such a transport vehicle is very expensive. Moreover, it does not offer a sufficiently stable foundation for a mast of the abovementioned high height to permit the mast to remain erected thereon unattended during any longer periods of time.
The invention has for its purpose to provide an improved mast base which avoids the above disadvantages and is well suited to be used for supporting a temporarily erected mast of high height also during extended periods of time and which, if so desired, may be utilized also to support a permanently erected mast without requiring any frequent attendance.
In accordance with the invention, for the above purpose, there is proposed a mast base, primarily characterized in that it comprises a body, formed partly by a generally rectangular container, provided with four upper corner fittings, located at the upper end thereof, and with four lower corner fittings, located at the lower end thereof, and partly by a stationary supporting frame, placed upon the container and attached to the four upper corner fittings of the container, said mast base further comprising four supporting legs, which are intended to support the body in a stable position on the ground and arranged to be placed in positions, in which they project laterally each from one corner of the body, and which are composed each of one lower arm, at its inner end connected to a lower corner fitting of the container, and one upper arm, at its inner end connected to the stationary supporting frame or to an upper corner fitting of the container, each supporting leg being provided, at its outer end, with a supporting foot, by means of which it may be placed resting on the ground.
The invention permits the body of the mast base to be made from a container of standard design, normally intended for transportation purposes, and a supporting frame, mounted on said container. Hereby the body of the mast base may be transported to the desired site on a vehicle of commonly occuring kind, suited for the transportation of such a container. Moreover, the invention permits the body of the mast base to be erected in a stable position without any penetration into the ground. In this connection, it could be mentioned that any required stay wires for a mast placed upon the mast base may be anchored to outer portions of the supporting legs. Hereby, it is also possible to avoid the prior need for anchoring such stay wires to special attachments mounted in the ground.
Additional characteristic features of the invention will appear from the subclaims and the following detailed specification, in which the invention is described in further detail with reference to the accompanying drawings, in which:
FIG. 1 shows a diagram
REFERENCES:
patent: 2998106 (1961-08-01), Aust et al.
patent: 3457685 (1969-07-01), Stein
patent: 3714660 (1973-01-01), Scrafford et al.
patent: 4185288 (1980-01-01), Dosch et al.
Brochure TLM-250, TLM-300, TLM-350, Transportable Lattice Masts, Johsson Processmekanik AB; Sep., 1990.
Gustafsson Karl M.
Sylvan Herman P. S.
Cue Dee Produktor AB
Ramirez Ramon O.
Telefonaktiebolaget L M Ericsson
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