Static structures (e.g. – buildings) – With lifting or handling means for primary component or...
Reexamination Certificate
1999-02-11
2001-07-17
Friedman, Carl D. (Department: 3635)
Static structures (e.g., buildings)
With lifting or handling means for primary component or...
C052S126700, C052S126600, C052S126100, C052S029000, C052S114000, C052S125100, C249S020000, C249S028000
Reexamination Certificate
active
06260311
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a concrete form suspension system and to a method of suspending and raising concrete forms during the erection of a concrete structure.
2. Description of the Related Art
In the construction of concrete buildings, forms used for the casting of concrete to form the walls of the building need to be lifted, after each storey of the building is completed, and repositioned for the casting of the next storey. For this purpose, cranes are usually employed and, therefore, the cranes need to be in operation and on standby for considerable periods of time for the raising of the forms from storey to storey.
BRIEF SUMMARY OF THE INVENTION
It is an object of the present invention to provide a novel and improved concrete form suspension system which avoids the use of cranes for lifting forms as the construction of a concrete structure proceeds.
According to the present invention, a concrete form suspension system comprises a vertically displaceable support structure, a form support projecting laterally from an upper portion of the support structure, a lifting device operable to raise the support structure along a vertically extending concrete structure, a support device for supporting the lifting device, the support device being secured to the concrete structure, and support numbers for supporting the support structure from the concrete structure, the support members being securable to the concrete structure.
When a system according to the present invention is in use, the support structure is firstly raised along the concrete structure by operation of the lifting device, which is supported on the concrete structure. The support members are then employed to support the support structure in a raised position, so that a concrete form suspended from the support structure can be correctly positioned for forming a further portion of the concrete structure. When this further portion of the concrete structure has been completed, the support device, or another support device, is positioned higher on the concrete structure and the support structure is again raised. The further support members can then be repositioned at higher locations than their original locations and, in these higher locations, serve to support the support structure in a second raised position higher than its first raised position. This sequence of operations can be repeated until the top of the concrete structure has been cast.
In a preferred embodiment of the invention, alignment members which are extensible and retractable between the support structure and the concrete structure, are employed for adjustably horizontally positioning the support structure relative to the concrete structure.
The alignment members are mounted on opposite sides of the support structure and project laterally from the support structure for engagement with the concrete structure.
In this preferred embodiment, a first pivotal connection is provided between the lifting device and the support structure and a second pivotal connection is provided between the lifting device and the support device. The first and second pivotal connections allow pivotation between the lifting device, on one hand, and the support structure and the concrete structure, on the other hand, thus facilitating horizontal adjustment of the support structure, for ensuring correct vertical alignment of the support structure in the raised position, without damage to the lifting device.
In this preferred embodiment of the invention, the lifting device comprises a substantially extending jack, the first pivotal connection with being provided between an upper end of the jack and the support structure and the second pivotal connection with being provided between the lower end of the jack and the support device secured to the concrete structure.
REFERENCES:
patent: 1701113 (1929-02-01), Keller
patent: 3096076 (1963-07-01), Walli
patent: 3510098 (1970-05-01), Fox
patent: 3851736 (1974-12-01), Westlake et al.
patent: 4029286 (1977-06-01), Ahl
patent: 4345671 (1982-08-01), Tosato et al.
patent: 4991365 (1991-02-01), Jackson
patent: 5088263 (1992-02-01), Horii et al.
patent: 5490367 (1996-02-01), Lee
patent: 5970680 (1999-10-01), Powers
patent: 6082058 (2000-07-01), Deng
A Phi Dieu Tran
Friedman Carl D.
LandOfFree
Concrete form suspension system and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Concrete form suspension system and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Concrete form suspension system and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2468204