Supports – Brackets – Specially mounted or attached
Reexamination Certificate
1999-03-02
2001-09-04
Braun, Leslie A. (Department: 3632)
Supports
Brackets
Specially mounted or attached
C248S228400, C248S229230, C248S229130, C248S218400, C248S231510, C248S316500, C403S385000, C403S399000, C343S892000
Reexamination Certificate
active
06283425
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a mounting bracket, whereby is meant a clamp device by means of which an object, for instance an elongated object, an antenna etc, can be secured to a ground pole, a tube or a post, a ground anchored post or a similar anchoring support. The clamp device comprises a first clamp part adapted to be secured to the object to be mounted against the pole, and a second clamp part adapted to embrace the pole and to be tightened to the first clamp part, generally by means of a screw-nut connection means. The invention also relates to a mounting bracket, which alternatively can be used for panning the object if the second clamp part is mounted on a supporting structure such as a wall.
BACKGROUND OF THE INVENTION AND RELATED ART
The invention has basically been developed in connection to mounting of antennas, like a base station or repeater station antenna in a mobile telephone system, whereby said first clamp part is mounted on the antenna while on the ground, whereupon the antenna with the pole clamp mounted thereon is raised and is mounted against the pole or post, generally in a vertical position and on a predetermined level above the ground. A prior art method of mounting antennas in known from Allgon mounting instruction no 71005A and 70690A1, available on request to Allgon AB, Patents, P O Box 500, 184 25Å Akersberga, Sweden, and incorporated herein by reference.
In the following the invention will mainly be described in connection with mounting of antennas on poles. It is to be understood, however, that the invention is not restricted to antenna pole clamps, but that the invention is useful in many other situations and for many other purposes, in which there is a need of mounting an object against a pole or a post on a predetermined level above the ground.
When mounting an antenna it is generally necessary to foresee that the antenna elements are placed freely in the air and without any obstacles in front of said elements, often on a substantial distance above the ground. For practical reasons the antenna is generally mounted on a pole on the ground or a building. To this end a first part of a clamp device, a base clamp, is secured to the antenna, whereupon the antenna with the pole clamp to be mounted is raised in that the installation engineer climbs a ladder, or lifts himself by means of a lifting device, with the antenna in his hands, and he places the base clamp of the antenna clamp device against the pole. In order to connect the antenna against said pole the installation engineer has to place the separate second clamp part against the outer side of the pole, he has to pull clamp screws through bores of said first and second clamp parts, and he has to tighten nuts engaging said clamp screws thereby solidly fixing the pole with the antenna between said first and second clamp parts.
It is obvious that it is, in practice, very difficult or even impossible for a single installation engineer to provide such mounting of an antenna against a pole, and it is often necessary that the mounting is made by two installation engineers, one installation engineer carrying the antenna and the second installation engineer pulling and tightening the screw-nut joint between the two clamp parts.
SUMMARY OF THE INVENTION
The object of the invention has been to suggest a clamp device of the above mentioned type which is designed so that it is very well possible for a single installation engineer to mount the antenna against an antenna pole. The clamp device comprises a first clamp, the base clamp, adapted to be anchored against an antenna, a second clamp, the tightening clamp, adapted to be tightened against said first clamp by means of a screw-nut joint with the antenna pole there between. The clamps preferably are formed as U-shaped brackets (⊂ ⊃) which along the branches thereof are formed with U- or V-shaped pole guide grooves or recesses.
According to the invention the second clamp, the tightening clamp, is formed with two elongated slots at the intermediate side of said clamp and extending in the longitudinal direction of the clamp, a first slot which may be closed and a second slot which is open at the end of the clamp for passage of the mounting bolts. The screws for tightening of the clamps against the pole are formed so that said screws can not rotate in the first clamp, the base clamp. This is provided in that said screws are of carriage bolt type having square bolt parts adjacent the head thereof, which square bolt parts engage square bores of said base clamp. Alternatively said bolts can be welded or by other means secured to said base clamp.
When using the above mentioned clamp device the screws are pulled through the bores of the base clamp and through the closed slot of the tightening clamp, and nuts are loosely screwed onto the outer ends of the screws. Thereby the clamp devices forms an integral part in which the tightening clamp is hanging freely from the corresponding clamp screw, and the twin clamp device can simply be tightened by a single installation engineer using only one hand, whereby the antenna with the integral clamp device can be held by the second hand.
The tightening is accomplished in that the tightening clamp is moved in a direction so that the screw extending through the closed slot engages the inner end of said closed slot. In this position the second slot, which is open at the outer end thereof can be brought to engage the second screw, and the clamp is thereafter moved back so that the screws preferably engage closed ends of the slots, and the nuts can simply be tightened thereby clamping the tightening clamp against the pole and the base clamp.
By connecting the base clamp and the tightening clamp with a rotating joint, e.g. in the form of a hinge and fastening the tightening clamp to a supporting structure, such as a wall, it is achieved that the antenna can be panned, i.e. its rotational position in respect of its vertical longitudinal axis can be adjusted to a desired value.
By further arranging a locking member between the base clamp and the tightening clamp the antenna can be locked in a desired rotational position.
REFERENCES:
patent: 3787015 (1974-01-01), Ablett
patent: 3920295 (1975-11-01), Speckin
patent: 4616797 (1986-10-01), Cramer
patent: 2062544 (1993-09-01), None
patent: 4431692 (1995-08-01), None
patent: 0643247 (1995-03-01), None
Mounting Instructions 71005A, Allgon System AB.
Mounting Instructions 70690A1, Allgon Systems AB.
Allgon AB
Braun Leslie A.
Jacobson & Holman PLLC
Wujciak A. Joseph
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