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US 2011/0214390 A1Published application
Hollow metal door
OwnerMichael Barnesinventor
Life of this patent
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Abstract
A hollow metal door using hollow structural sections with closed cross section, along with the method for making same, is described herein.
Claims12
A door, comprising
- An inner structure comprised entirely of hollow structural sections, and
- An outer shell comprised of at least two sheets.
- Wherein said outer shell surrounds, and is joined to said inner structure.
A hollow metal door, comprising
- An inner core;
- An outer core;
- and
- An outer shell;
- Wherein said inner core and said outer core is comprised of a plurality of joined hollow structural sections, and
- Wherein said inner core and said outer core are joined to each other, and to said outer shell.
3 more elements
A method of fabricating a door, comprising the steps of:
- Joining a plurality of hollow structural sections to form an inner core and an outer core;
- Joining said inner core and said outer core to form a combined core;
- Bending a first sheet to accommodate insertion of said combined core;
- Joining said combined core within said first sheet;
- Joining a second sheet to said first sheet
2 more elements
Dependencies are inferred from the claim text.