Static structures (e.g. – buildings) – Assembled in situ-type anchor or tie – Sheet or wire tie
Reexamination Certificate
2002-09-10
2003-10-28
Friedman, Carl D. (Department: 3635)
Static structures (e.g., buildings)
Assembled in situ-type anchor or tie
Sheet or wire tie
C052S712000, C052S717060, C024S295000, C024S563000
Reexamination Certificate
active
06637172
ABSTRACT:
BACKGROUND OF THE INVENTION
It is often necessary to fireproof structural steel columns, beams and the like which have a center web and extended opposite flanges. This is often accomplished by placing a plurality of clip elements in spaced condition on the flanges, and attaching wall board thereto which is thereupon treated with fireproofing material.
A problem with existing clips is that they are expensive, relatively speaking, and often slide downwardly on at least the flanges of vertical beams and do not always maintain the position needed to affix the drywall material thereto.
Therefore, it is a principal object of this invention to provide a clip element for such structural components which will rigidly secure themselves thereto, and which are economical of manufacture.
A further object of this invention is to provide a clip element of a single piece of sheet metal which has a reinforced hinge component. These and other objects will be apparent to those skilled in the art.
REFERENCES:
patent: 3748815 (1973-07-01), Parker
patent: 3897081 (1975-07-01), Uydess
patent: 3962840 (1976-06-01), Nelsson
patent: 6067691 (2000-05-01), Feltman
patent: 6385935 (2002-05-01), Lippy
Photographs of prior art device on the right at top and bottom, on sale prior to applicant's invention*-cited by.
Friedman Carl D.
Thissell Jennifer I.
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