Static structures (e.g. – buildings) – With lifting or handling means for primary component or... – Construction or component having means to engage hand or...
Patent
1997-02-18
1999-02-09
Kent, Christopher Todd
Static structures (e.g., buildings)
With lifting or handling means for primary component or...
Construction or component having means to engage hand or...
52 66, 521221, 527452, 527491, E02O 3500
Patent
active
058679502
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a device for lifting a framework, optionally together with a portion of a building resting on said framework, and in particular a roof, relative to underlying walls, by using a plurality of such devices distributed around the framework.
BACKGROUND OF THE INVENTION
Lifting devices that are supported either on the ground surrounding the building whose roof is to be lifted, or that are supported on a floor or story of the building are already known. For example, reference may be made to documents WO-A-94 11596 and FR-A-2 540 543 which describe lifting devices using jacks supported on a floor of the building whose roof is to be raised. Reference may also be made to document U.S. Pat. No. 4,980,999 which describes a lifting device supported on the surrounding ground, and constituted either by lifting towers incorporating winch systems, or else by jacks mounted on a support itself standing on the ground.
Those known devices are not organized to be capable of being fixed to the surface of a wall, and in addition their structure is extremely bulky, thus giving rise to high manufacturing cost.
Document FR-A-2 720 430 in the name of the Applicant and published on Dec. 1, 1995, describes a lifting device of the above type, and comprising: of a wall, in particular an outside surface thereof; support means and for co-operating with an element of the framework resting thereon; means, in a direction that is capable of being oriented substantially vertically; and support means are constituted by three distinct wall plates that are fixed independently of one another to the wall, comprising a low plate serving as a support for a jack constituting the controlled thrust means, and a high plate and an intermediate plate co-operating with stanchions carrying the cursor for the purpose of constituting guide means therefor.
That embodiment of a device for lifting a roof suffers from the drawback of being complex, expensive to manufacture, lengthy and fiddly for fixing to and adjusting on the surface of a wall, lengthy to dismantle after the roof has been lifted to the desired level and the wall has been built up to the roof lifted in this way, and it is particularly detrimental to the appearance of the wall since it is necessary to drill numerous holes therein for fixing the various plates.
OBJECTS AND SUMMARY OF THE INVENTION
An object of the present invention is to remedy those drawbacks and, to this end, the present invention provides a device of the type specified in the preamble, characterized in that the support means include a wall plate common to the guide means and to the controlled thrust means, and common connection means for connecting the guide means and the controlled thrust means with the wall plate, ensuring identical orientation therefor.
By designing the support means in this way, using only one wall plate, installing, adjusting, and then removing the device is much easier and much quicker, and the device leaves fewer unsightly marks after it has been removed, thus reducing the amount of work involved in making a preexisting wall presentable again. In addition, the device is suitable for being implemented in a manner that is particularly simple and cheap, as will appear clearly to a person skilled in the art from the description below.
Such a person skilled in the art will also readily understand that a device of the invention can be used for lifting any type of framework, which may possibly be bare, but which will usually be carrying a portion of a building, generally constituted by a roof as described in the above-mentioned French patent application, but which could also be constituted by some other component of a building, such as a floor, in which case the term "lifting" should be understood broadly, implying not only moving in an upwards direction but including moving downwards. Naturally, the sites on the vertical wall surface to which the wall plates of the various devices of the invention are to be fixed will be selected as a function of the nature of the framework
REFERENCES:
patent: 3921362 (1975-11-01), Cortina
patent: 4980999 (1991-01-01), Terenzoni
Brackett Jr. Tim L.
Ferguson Jr. Gerald J.
Kent Christopher Todd
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