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US 4,494,354 AGranted
Door frame construction
AssigneeNational Manufacturing Co.
InventorJames R. Johnston
Life of this patent
Estimating the term…
Abstract
A door frame is fabricated of rolled sheet metal vertical frame pieces each including a first channel for receiving the end portions of wood or metal horizontal crosspieces and a second channel for receiving the end portions of corrugated or other panel members, the latter channel being formed by rolling a portion of the sheet metal back on itself to provide a double walled strength portion.
Claims10
A door frame, comprising in combination
- first and second vertical frame members each having first and second mutually parallel channels facing toward the other of said vertical frame members,
- said first channel being defined by a first web portion and first and second rigid side flanges,
- said second channel being defined by a second web portion, a third rigid side flange and said second rigid side flange,
- said flanges each having straight mutually parallel inner and outer surfaces perpendicular to said first and second web portions,
- a plurality of horizontal frame members respectively received in said first channels and disposed against said first webs and said inner surfaces of said first and second flanges,
- a panel positioned against said horizontal frame members received in said second channel of said vertical frame members and disposed against said inner surface of said flange with its vertical edge portions respectively disposed in said second channels,
- said second web portion and said third side flange being substantially thicker than said first web portion and said first and second side flanges.
4 more elements
A door frame, comprising in combination,
- first and second vertical frame members, each frame member being a piece of sheet metal rolled formed into first and second mutually parallel channels facing toward the other of said vertical frame members.
- said first channel being defined by a first web portion and first and second rigid side flanges having equal thickness,
- said second channel being defined by a second web portion, a third rigid side flange and said second rigid side flange,
- said flanges each having straight mutually parallel inner and outer surfaces perpendicular to said first and second web portions,
- the width of said second web portion being substantially less than the width of said first web portion, and the length of said third flange being substantially less than the length of said first and second flanges,
- said sheet metal piece being partially rolled back onto itself forming said third flange and said second web portion substantially thicker than said first and second flanges and said first web,
- a plurality of horizontal frame members respectively received in said first channels and disposed against said first webs and said inner surfaces of said first and second flanges,
- a panel positioned against said horizontal frame members received in said second channels of said vertical frame members and disposed against said inner surfaces of said third flanges and said outer surfaces of said second flanges with its vertical edge portions respectfully disposed in said second channels.
5 more elements
Dependencies are inferred from the claim text.