US4470567A — Gliding airfoil parachute canopy construction

Claim 1

Independent Claim 152 words

A gliding airfoil parachute canopy having a generally rectangular configuration with generally parallel leading and trailing edges and side edges extending between the leading and trailing edges, said canopy comprising a plurality of panels of flexible material of one-piece construction extending continuously spanwise of the canopy, seams continuously securing the trailing edge of a leading spanwise panel to the leading edge of a trailing spanwise panel, a plurality of chordwise ribs on the canopy extending from leading edge to trailing edge of the canopy, said continuous spanwise panels enabling the ribs to be located anywhere along the span of the panel to form cells extending from leading edge to trailing edge of the canopy thereby enabling the cell width to be determined by design characteristics rather than the width of the bolt of material as required in canopies having panels extending from leading edge to trailing edge secured together by chordwise seams.

Claim 2

Dependent Claim 152 words

A gliding airfoil parachute canopy having a generally rectangular configuration with generally parallel leading and trailing edges and side edges extending between the leading and trailing edges, said canopy comprising a plurality of panels of flexible material of one-piece construction extending continuously spanwise of the canopy, seams continuously securing the trailing edge of a leading spanwise panel to the leading edge of a trailing spanwise panel, a plurality of chordwise ribs on the canopy extending from leading edge to trailing edge of the canopy, said continuous spanwise panels enabling the ribs to be located anywhere along the span of the panel to form cells extending from leading edge to trailing edge of the canopy thereby enabling the cell width to be determined by design characteristics rather than the width of the bolt of material as required in canopies having panels extending from leading edge to trailing edge secured together by chordwise seams.

Claim 3

Dependent Claim 154 words

A ram air inflated parachute having an airfoil shape and made of material which comprises: an upper surface, a lower surface and spaced apart ribs sewn to and extending between the upper surface and the lower surface to divide the canopy into a series of chordwise extending cells for inflation by ram air pressure whereby the ribs are connected to the upper surface and the lower surface by a series of first interconnecting seams; said upper surface and said lower surface each constructed of at least two elongated panels sewn continuously along adjacent elongated edges by one or more second interconnecting seams; and said elongated panels extending the full spanwise width of the parachute and substantially perpendicular to said ribs whereby said first interconnecting seams intersect said second interconnecting seams substantially at right angles to each other whereby the fabric in the upper and lower surfaces is divided into sections by said interconnecting seams.

Claim 4

Dependent Claim 154 words

A ram air inflated parachute having an airfoil shape and made of material which comprises: an upper surface, a lower surface and spaced apart ribs sewn to and extending between the upper surface and the lower surface to divide the canopy into a series of chordwise extending cells for inflation by ram air pressure whereby the ribs are connected to the upper surface and the lower surface by a series of first interconnecting seams; said upper surface and said lower surface each constructed of at least two elongated panels sewn continuously along adjacent elongated edges by one or more second interconnecting seams; and said elongated panels extending the full spanwise width of the parachute and substantially perpendicular to said ribs whereby said first interconnecting seams intersect said second interconnecting seams substantially at right angles to each other whereby the fabric in the upper and lower surfaces is divided into sections by said interconnecting seams.

Claim 5

Dependent Claim 32 words

The combination of claim 2 and including suspension lines for attaching a load connected to said lower surface at the approximate intersection between said first interconnecting seams and said second interconnecting seams.

Claim 6

Dependent Claim 28 words

The combination of claim 2 wherein said elongated panels are formed of uninterrupted fabric and extend the full spanwise width of the upper surface and the lower surface.

Claim 7

Dependent Claim 46 words

The combination of claim 2 and including reinforcing means attached to the ribs and extending from the lower surface to the upper surface; said reinforcing means being attached to the lower surface approximately at the intersection between said first interconnecting seams and said second interconnecting seams.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1987-09-11	1988-03-12	1988-09-11	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1991-09-11	1992-03-12	1992-09-11	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1995-09-11	1996-03-12	1996-09-11	$7700.00	Window Closed / Lapsed

Gliding airfoil parachute canopy construction

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