Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Having securing element projecting through aperture in sleeve
Reexamination Certificate
2000-11-20
2002-06-18
Wilson, Neill (Department: 3627)
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Having securing element projecting through aperture in sleeve
C411S182000, C411S508000, C411S913000
Reexamination Certificate
active
06406233
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to an anchor for attaching objects to metal studs covered with sheetrock or drywall.
The interior walls of residential buildings typically are formed of wooden studs overlaid with sheetrock or drywall. With such construction nails or screws can be secured to the wooden studs for the purpose of hanging pictures, mirrors, cabinets, etc.
More recently the use of metal studs as replacements for wooden studs for wall construction in residential structures has been increasing. Metal studs have a number of advantages over wooden studs, including resistance to rot, fire resistance, economics, environmental considerations, etc.
However, one problem with metal studs is that nails or screws cannot be permanently secured to them for hanging objects that are too heavy to hang from drywall anchors as they work loose. For very heavy items, such as cabinets, cupboards, and shelving, contractors currently have to first secure a wooden backing member to the steel studs prior to installing the drywall. Applying such backing members is expensive and time consuming.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an anchor member for hanging objects which can be easily secured to metal studs after drywall has been installed over the studs.
REFERENCES:
patent: 2685877 (1954-08-01), Dobelle
patent: 3352195 (1967-11-01), Fisher
patent: 3669481 (1972-06-01), Bergmann
patent: 4074888 (1978-02-01), Garner
patent: 4181061 (1980-01-01), McSherry
patent: 4358234 (1982-11-01), Takagawa et al.
patent: 4553889 (1985-11-01), Le Dantec et al.
patent: 4770583 (1988-09-01), Lindberg
patent: 4875815 (1989-10-01), Phillips
patent: 5173025 (1992-12-01), Asami
patent: 5624130 (1997-04-01), Ricks
patent: 5632584 (1997-05-01), Acevedo
Howard Robert E.
Shaner Brenten P.
Wilson Neill
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