Aerial cargo container

• US 5,947,419 A
• Filed: 01/21/1998
• Issued: 09/07/1999
• Est. Priority Date: 01/21/1998
• Status: Expired due to Term

• Current Assignee: Charles M. Warren, Charles V. Warren
• Original Assignee: Charles M. Warren, Charles V. Warren
• Inventors: Warren, Charles V., Warren, Charles M.
• Primary Examiner(s): Mojica, Virna Lissi
• Application Number:
  US09/009,955
• Time in Patent Office: 594 Days
• Field of Search: 244/1 TD, 244/137.4, 244/138 A, 244/139, 102/384, 102/388
• US Class Current: 244/138.00A
• CPC Class Codes: B64D 1/02 Dropping, ejecting, or releasing articles jettisonable fuel reservoirs B64D37/12
• CPC Class Codes: B64D 19/02 Rotary-wing parachutes

Abstract

An aerial cargo container system for transporting cargo from an aircraft to the ground having a cargo box with a continuous side wall with six rectangular side panels, and rotor blades having stowed positions against alternating box side panels and deployed positions extending outwardly from the box in a generally horizontal plane. Each blade may include a lower panel and an upper panel that has two triangular sections behind the leading edge that forms an aerodynamic camber. The blades are hinged to a rotor hub secured across the top of the box. The upward deployment of the blades is limited by tethers extending from the blades down to a tether attach frame secured across the bottom of the box. The box and blades are preferably formed of corrugated paper or plastic material. The entire unit rotates with the load to create aerodynamic braking and lower cargo to the ground with a minimum of energy being translated to the cargo on impact.

Claims

1. An aerial cargo container comprising:

a) a cargo box having an upper end;

b) a rotor hub affixed across the upper end of said box, said hub includes a plurality of rotor blade hinge point pairs, each pair having a leading hinge point and a trailing hinge point, said leading hinge point being lower than said trailing hinge point; and

c) a plurality of rotor blades having aerodynamic camber, leading and trailing edges, and roots hinged to said rotor blade hinge point pairs, said blades having a stowed position against said box and a deployed position extending outwardly from said box in a generally horizontal plane, said blades being rotatable with said hub and said box.

2. The aerial cargo container delivery system of claim 1, further including tethers to limit the upward movement of said blades upon deployment.

3. The aerial cargo container delivery system of claim 1, further including a deformable plug lid adjacent said lower wall.

4. The aerial cargo container delivery system of claim 1, wherein each of said blades is formed of a corrugated material with a planar lower surface and a cambered upper surface that includes a triangular raised section.

5. The aerial cargo container delivery system of claim 1, further including a tether attach frame across said lower plug lid end wall.

6. The aerial cargo container delivery system of claim 1, wherein said box is constructed of corrugated material.

7. The aerial cargo container system of claim 1, wherein said hub is formed of welded wire or molded plastic.

8. The aerial cargo container delivery system of claim 1, wherein said box has six side panels, and said system has three blades, said blades having stowed positions against alternating side panels.

9. The aerial cargo container delivery system of claim 1, wherein said box includes a lower wall, a tether attach frame across said lower wall, and tethers extending from said blades to said tether attach frame.

10. The aerial cargo container system of claim 1, further including hinge pins extending through said pairs of hinge points and the rotor blade root hinge to attach said blades to said hub.

11. The container of claim 1, wherein each of said blades includes a lower panel and an upper panel, said upper panel including a front segment inclined upward and back from the front edge of the blade, a spar pocket that contains a blade spar, a central segment having a front edge adjacent the rear of the spar pocket, and inclined to the rear and down to a rear edge abutting the lower panel, and a rear segment parallel to the lower panel and having a front edge integral with the rear edge of the center segment and a rear edge integral with the rear edge of the lower panel.

12. The container of claim 1, wherein the upper surface of each of said blades further includes a planar surface behind said trailing triangular section, said planar section being parallel to said lower surface.

13. The container of claim 1, wherein each of said blades if formed from a single sheet.

15. The container of claim 4, wherein the corrugations of said sheet is parallel to the longitudinal axis of said blade.

14. An aerial cargo container comprising:

a) a box having a continuous side wall formed of six rectangular side panels, an upper end wall at one end of said side wall and a lower plug lid end wall at the opposite end of said side wall, said walls being constructed of corrugated material and forming a cargo cavity;

b) three rotor blades having leading and trailing edges, and hinged roots, said blades having a stowed position against alternating side panels of said side walls and a deployed position extending outwardly from said box in a generally horizontal plane, each of said blades including a lower panel and an upper panel, said upper panel including a triangular section;

c) a rotor hub affixed across the upper end wall, said hub including rotor blade hinge point pairs adjacent alternating panels, each pair having a leading hinge point and a trailing hinge point, said leading hinge point being lower than said trailing hinge point said blades being hinged at their roots to said blade hinge point pairs, said blades being rotatable with said hub and said box;

d) a tether attach frame across the lower plug lid wall; and

e) tethers extending from said blades to said tether attach frame.