Patent US5991307A successfully refreshed from Google Patents.
Patent US4781343A successfully refreshed from Google Patents.
US4781343A
Expired / Lapsed
US
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Load distributing curved tapes on parafoil panels
Assignee: VERTIGO Inc A CA CORP
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Filing: 1987-10-13
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Granted: 1988-11-01
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Expires: 2007-10-13
Abstract
Abstract A parafoil includes upper and lower panels, connector panels, load strands, and tapes attached to the connector panels to form cusps, and catenaries between the cusps.
Inventors
- 👤 Glen J. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:53
CPC Classifications
B; B64; B64D; B64D17/00; B64D17/02; B64D17/025
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
141 words
In a parafoil, the combination comprising (a) an upper panel, (b) a lower panel, spaced below said upper panel, (c) upright connector panels joined to said upper and lower panels and laterally spaced apart, the connector panels extending generally forwardly and rearwardly and forming inflatable pockets having open forward ends and closed rearward ends, the pockets laterally spaced apart, (d) load support strands connected to the parafoil at forwardly and rearwardly spaced locations proximate lower edges of the connector panels, (e) and load distributing tapes attached to said connector panels to extend along curved lines which are upwardly convex between said upper and lower panels, said tapes having lowermost terminations proximate said forwardly and rearwardly spaced locations, (f) said panels consisting of lightweight easily foldable fabric materials, and said upper and lower panels defining forward and rearward edges of the parafoil.
Claim 2
Dependent Claim
141 words
In a parafoil, the combination comprising (a) an upper panel, (b) a lower panel, spaced below said upper panel, (c) upright connector panels joined to said upper and lower panels and laterally spaced apart, the connector panels extending generally forwardly and rearwardly and forming inflatable pockets having open forward ends and closed rearward ends, the pockets laterally spaced apart, (d) load support strands connected to the parafoil at forwardly and rearwardly spaced locations proximate lower edges of the connector panels, (e) and load distributing tapes attached to said connector panels to extend along curved lines which are upwardly convex between said upper and lower panels, said tapes having lowermost terminations proximate said forwardly and rearwardly spaced locations, (f) said panels consisting of lightweight easily foldable fabric materials, and said upper and lower panels defining forward and rearward edges of the parafoil.
Claim 3
Dependent Claim
17 words
The combination of claim 1 wherein said load distributing tapes are everywhere spaced below said upper panel.
Claim 4
Dependent Claim
16 words
The combination of claim 1 wherein said tapes have catenary configuration between said lowermost terminations thereof.
Claim 5
Dependent Claim
36 words
The combination of claim 1 wherein there are seams that extend along lower edges of said upright panels, the lowermost terminations of the tapes attached to said seams, and the strands also attached to the seams.
Claim 6
Dependent Claim
54 words
The combination of claim 1 wherein said tapes provide means configured to distribute loading to and along said upright panels so that the connections of the upright panels to the upper panel are smoothly curved with upward convexity between said forward and rearward edges of the parafoil, during parafoil flight with said pockets airinflated.
Claim 7
Dependent Claim
21 words
The combination of claim 5 wherein said tapes form multiple catenaries along the forward to rearward lengths of each connector panel.
Claim 8
Dependent Claim
33 words
The combination of claim 3 wherein said tapes form multiple catenaries along the forward to rearward lengths of each connector panel, and said parafoil has a consequent increased glide ratio and increased strength.
Claim 9
Dependent Claim
23 words
The combination of claim 1 including cross vent openings through certain connector panels, said cross vent openings located below said load distributing tapes.
Claim 10
Dependent Claim
25 words
The combination of claim 3 including cross vent openings through the connector panels, each cross vent opening located below one of the catenary configured tapes.
Claim 11
Dependent Claim
21 words
The combination of claim 6 wherein the tape has tensile stiffness significantly greater than the tensile stiffness of the panel fabric.
Claim 12
Dependent Claim
17 words
The combination of claim 1 wherein the tapes form cusps below lower edges of the connector panels.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-01 | 1992-05-02 | 1992-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-01 | 1996-05-02 | 1996-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-01 | 2000-05-02 | 2000-11-01 | $7700.00 | Window Closed / Lapsed |