Window tandem balance cover
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FIG. 1 is a front elevational view of a window tandem balance cover showing our new design;
FIG. 2 is a right side elevational view, rotated by 90.degree., of the window tandem balance cover of FIG. 1;
FIG. 3 is a left side elevational view, rotated by 90.degree., of the window tandem balance cover of FIG. 1;
FIG. 4 is a bottom plan view of the window tandem balance cover of FIG. 1; the top plan view being the mirror image thereof;
FIG. 5 is a cross-sectional view of the window tandem balance cover of FIG. 1, taken through line 5--5 of FIG. 4;
FIG. 6 is a cross-sectional view of the window tandem balance cover of FIG. 1, taken through line 6--6 of FIG. 2;
FIG. 7 is a partial cross-sectional view of the window tandem balance cover of FIG. 1, taken through line 7--7 of FIG. 3; and,
FIG. 8 is a cross-sectional view of the window tandem balance cover of FIG. 1, taken through line 8--8 of FIG. 2.
| 392071 | October 1888 | Rosentreter |
| 596216 | December 1897 | Ocumpaugh |
| 1002145 | August 1911 | Gilroy |
| 4271631 | June 9, 1981 | Trout |
Type: Grant
Filed: Feb 7, 1997
Date of Patent: Feb 2, 1999
Assignee: CertainTeed Corporation (Valley Forge, PA)
Inventors: Brian C. Opielski (Malvern, PA), Jeffrey B. Hersh (Wayne, PA), Dennis Westphal (Parma, MI)
Primary Examiner: B. J. Bullock
Attorneys: Duane, Morris & Heckscher, Duane, Morris & Heckscher
Application Number: 0/66,376
International Classification: 0809;
