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US 3,940,891 AGranted
Conical structure
AssigneeGeneral Dynamics Corporation
InventorPaul Slysh
Life of this patent
Estimating the term…
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.
Claims9
A high strength conical structure comprising:
- at least one skin sheet configured as a section of a conical surface;
- a first plurality of upstanding ribs of substantially equal height extending away from said skin sheet and integral therewith;
- said first plurality of ribs configured in evenly spaced alternately right and left spirals said right and left spirals being defined by the equasion ##EQU1## wherein R.sub.1 and R.sub.2 are radii from the cone apex to selected points 1 and 2 on the spiral and .theta. is the angle at the cone apex between the radii vectors R.sub.1 and R.sub.2 in radians.
- a second plurality of upstanding ribs of substantially even height with said first plurality of ribs extending away from said skin sheet and integral therewith;
- said second plurality of ribs extending along conic generatrix and intersecting said first plurality of ribs only at points of intersection and between right and left spiral ribs;
- narrow flanges at the inner edge of each of said first and second plurality of ribs, said flanges being substantially parallel to said skin;
- and
- a circular node pocket bounded by a circular flanged rib at the intersections of said first and second pluralities of ribs.
5 more elements
A high strength conical structure comprising:
- at least one skin sheet configured as a section of a conical surface;
- a first plurality of inwardly upstanding ribs of substantially equal height extending away from said skin sheet and integral therewith;
- said first plurality of ribs configured in evenly spaced alternately right and left spirals, said right and left spirals being defined by the equasion ##EQU2## wherein R.sub.1 and R.sub.2 are radii from the cone apex to selected points 1 and 2 on the spiral and .theta. is the angle at the cone apex between the radii vectors R.sub.1 and R.sub.2 in radians;
- a second plurality of upstanding ribs of substantially even height with said first plurality of ribs extending away from said skin sheet and integral therewith;
- said second plurality of ribs extending along conic generatrix and intersecting said first plurality of ribs only at points of intersection between right and left spiral ribs;
- narrow flanges at the inner edge of each of said first and second plurality of ribs, said flanges being substantially parallel to said skin;
- said skin being thicker along a strip adjacent and parallel to the rib bases so that each rib, flange and thickened strip combine to present an I-beam like cross-section configuration;
- and
- at least some of said ribs having a greater thickness near said skin than near said flanges.
6 more elements
A high strength conical structure comprising:
- at least one skin sheet configured as a section of a conical surface;
- a first plurality of inwardly upstanding ribs of substantially equal height extending away from said skin sheet and integral therewith;
- said first plurality of ribs configured in evenly spaced alternately right and left spirals, said right and left spirals being defined by the equasion ##EQU3## wherein R.sub.1 and R.sub.2 are radii from the cone apex to selected points 1 and 2 on the spiral and .theta. is the angle at the cone apex between the radii vectors R.sub.1 and R.sub.2 in radians;
- a second plurality of inwardly upstanding ribs of substantially even height with said first plurality of ribs extending away from said skin sheet and integral therewith;
- said second plurality of ribs extending along conic generatrix and intersecting said first plurality of ribs only at intersections between right and left spiral ribs;
- narrow flanges at the inner edge of each of said first and second plurality of ribs, said flanges being substantially parallel to said skin;
- a circular node pocket bounded by a circular flanged rib at the intersections of said first and second pluralities of ribs;
- and
- a plurality of support means engaging a plurality of the circular flanges, at least two of said support means secured to an object to be mounted on said structure and spaced apart a distance equal to the spacing of said pockets, each of said support means comprising:
- a circular member in contact with the outer surface of said circular flange and secured to said object;
- a generally bar-shaped attachment fixture within said pocket in contact with the under surface of said circular flange;
- and
- bolt means engaging said circular member and said fixture to clamp them together with said circular flange therebetween.
10 more elements
Dependencies are inferred from the claim text.