04084347 is referenced by 50 patents and cites 11 patents.

An improved door suitable for use in industrial plants and other such areas where the door is to be opened and closed by objects or vehicles which strike the side of the door. The door has a hollow body provided with a monolithic construction and is formed from a moldable material which is highly resistant to impact forces exerted thereon. The body is filled with a foamed-in-place insulating material and has reinforcing means at spaced locations therein to maintain the shape of the door. Gasket structure is used at one or more margins of the door, and the door is to be swingably mounted on an adjacent door jamb.

Title
High impact resistance door
Application Number
489861
Publication Number
4084347
Application Date
March 25, 1976
Publication Date
April 18, 1978
Inventor
James W Brown
1612 Canyon Park Dr., Bend, 97701
OR, US
IPC
E05D 7/00
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