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Thermally insulated window sash construction for a casement window
| Details |
Inventors: Biro, Alexander J.;
Assignee: Winchester Industries, Inc. (Saltsburg, PA)
Primary Examiner: Pate, III; William F.
Assistant Examiner: Smith; Creighton
Attorney, Agent or Firm: Parmelee, Miller, Welsh & Kratz
A window sash member includes first and second generally parallel sidewalls. First and second spaced, generally parallel transverse walls, extending between and oriented generally perpendicular to the first and second sidewalls, connect the first and second sidewalls to define a first hollow chamber. A third transverse wall, located without the first hollow chamber adjacent to and generally parallel to the first transverse wall, extends from the first transverse wall and terminates short of the second sidewall. A first interior wall, oriented generally parallel to the first sidewall, extends from the third transverse wall to the first transverse wall to define a second hollow chamber. A fourth transverse wall, located without the first hollow chamber adjacent to and generally parallel to the second transverse wall, extends from the first sidewall and terminates short of the second sidewall. A second interior wall, oriented generally parallel to the second sidewall, extends from the fourth transverse wall to the second transverse wall to define a third hollow chamber. A window sash employs at least one of such sash members. |
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DETAILED DESCRIPTION The window sash member of the present invention includes first and second generally parallel sidewalls.
First and second spaced, generally parallel transverse walls, extending between and oriented generally perpendicular to the first and second sidewalls, connect the first and second sidewalls to define a first hollow chamber.
A third transverse wall, located without the first hollow chamber adjacent to and generally parallel to the first transverse wall, extends from the first transverse wall and terminates short of the second sidewall.
A first interior wall, oriented generally parallel to the first sidewall, extends from the third transverse wall to the first transverse wall to define a second hollow chamber.
A fourth transverse wall, located without the first hollow chamber adjacent to and generally parallel to the second transverse wall, extends from the first sidewall and terminates short of the second sidewall.
A second interior wall, oriented generally parallel to the second sidewall, extends from the fourth transverse wall to the second transverse wall to define a third hollow chamber.
The window sash of the present invention has a plurality of sash members, including generally parallel top and bottom rail members fixedly secured to a pair of spaced stile members, the top and bottom rail members being generally perpendicular to the stile members.
At least one of the sash members is a sash member of the invention.
Preferably, the bottom rail member is a sash member of the invention and, more preferably, all of the sash members forming the sash are sash members of the invention.
The window sash and window sash member of the invention provide a casement window construction with improved thermal insulation due to the plurality of chambers having air trapped therein which resists heat transfer through the window.
A further advantage of the window sash and window sash member of the invention is the ease with which glass panes can be replaced.
These and other objects of the invention will be more fully understood from the following description of the invention and accompanying drawings
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