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Primary Examiner: Purser, Ernest R.
Assistant Examiner: Raduazo, Henry
Attorney: Duncan; John R.

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Title: Conical structure

Abstract: A high strength frusto-conical or conical structure utilizing an integral flanged reinforcing grid is disclosed. The structure comprises a skin plate having a generally conical shape, with a plurality of upstanding integral ribs. At least some of the ribs are configured in evenly spaced right and left spirals. Other ribs may extend along conic generatrix intersecting the spiral ribs at points where right and left spiral ribs intersect. Each rib includes a narrow flange at the inner edge, lying substantially parallel to the skin.

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Inventors: Slysh, Paul (San Diego, CA, US)

Application Number: 495029
Filing Date: 1974-08-05
Publication_date: 1976-03-02
Assignee: General Dynamics Corporation (San Diego, CA)
Primary Class(es): 52/82 52/630, 244/119, 244/120, 428/116
Other Classes:
US Patent Ref:

682104	Sep, 1901	Middleton	248/20.
1766961	Jun, 1930	Steuart	244/119.
1818423	Aug, 1931	Mammert	244/119.
1894011	Jan, 1933	Wallis	244/119.
2060387	Nov, 1936	Wallis	244/119.
2157042	May, 1939	Wallis	244/131.
2458686	Jan, 1949	Davie	52/630.
2639876	May, 1953	Misfeldt	52/630.
2952341	Sep, 1960	Weiler	52/630.
3579942	May, 1971	Cole	52/617.

Other Refs: 850,621577,15447,113

Sep, 1939	FR
May, 1946	UK
Mar, 1932	DK

Other References: The Isogrid; Machine Design, Apr. 19, 1973.
Architectural Record, Nov. 1955, p. 235.