Movable or removable closures – With operator for movably mounted closure – Operating lever or link and closure swing about parallel axes
Reexamination Certificate
1999-07-22
2001-06-19
Redman, Jerry (Department: 3634)
Movable or removable closures
With operator for movably mounted closure
Operating lever or link and closure swing about parallel axes
C074S545000
Reexamination Certificate
active
06247270
ABSTRACT:
BACKGROUND OF THE INVENTION
Most rotary operators are manufactured from metal housings and bases, which typically house a worm gear and activating guide arms. The metal housings are prone to extreme heat conductivity. The metal housings may produce condensation on the interior side of windows fitted with the rotary operators. Condensation occurs at the location of the metal operator. Also, those types of metal operators are in need of paint finishes. Both the metal and the paint are likely to corrode over a period of time.
The other operators on the market are produced from a die-cast zamack material, which breaks down in a seacoast application. The metal therefore requires some type of finish on the outer surface. The interior surfaces of the operator, which includes the operating gears, are left unfinished. Thus, the unfinished interior of the body and the worm gear is prone to corrosion. Another problem with metal operator covers is that the metal of the base housing and the metal of the worm-gear are different metals. Having dissimilar metals in contact creates additional force and friction between the parts, thus causing a high factor of wear on the parts. The high factor of wear increases the chances of the parts failing. The metal operators also conduct heat at a much greater rate than other material types.
A need exists for a rotary operator that is not subject to corrosion, that conducts heat at a low rate thereby eliminating condensation, and that does not have dissimilar metals in contact so that the need for a lubricant is eliminated.
SUMMARY OF THE INVENTION
The present invention relates to window operators, and more specifically, to operators for venting casement windows.
The base housing of the operator is produced from a plastic polymer, which is a non-corrosive and non-thermal conducting material. The top and bottom base components are then sonic welded with the heat-treated steel worm gear welded inside of the plastic base of the window operator creating a one-piece assembly. The worm gear and pinion gear with attached operator arm are placed within the base body before fusion welding the top body.
The use of the plastic polymer for the base housing eliminates the possibility of corrosion of the base material. Also, the polymer does not require finishing or painting to protect it from corrosion.
These and further and other objects and features of the invention are apparent in the disclosure, which includes the above and ongoing written specification, with the claims and drawings.
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G-U Hardware, Inc.
Narasimhan Meera P.
Redman Jerry
Way James Creighton
LandOfFree
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