초록 ▼

A vertical take-off and vertical descent aircraft having a vertically extending main air duct extending through the body and having an air inlet at the top and a number of air outlets at the bottom, two oppositely rotatable impellers located in said duct and operable to create a downward thrust of a

A vertical take-off and vertical descent aircraft having a vertically extending main air duct extending through the body and having an air inlet at the top and a number of air outlets at the bottom, two oppositely rotatable impellers located in said duct and operable to create a downward thrust of air, wing ducts extending from an air distributor to spaced apart extremities of the wings and exiting in downward directions for stabilization, a rear air duct at the rear of the body with an air outlet for forward propulsion and directional control, and means for controlling air direction at the outlet of each of the wing ducts and at the bottom outlet duct and at the rear outlet.

대표청구항 ▼

A vertical take-off and vertical descent aircraft having a vertically extending main air duct extending through the body and having an air inlet at the top and a number of air outlets at the bottom, two oppositely rotatable impellers located in said duct and operable to create a downward thrust of a

A vertical take-off and vertical descent aircraft having a vertically extending main air duct extending through the body and having an air inlet at the top and a number of air outlets at the bottom, two oppositely rotatable impellers located in said duct and operable to create a downward thrust of air, wing ducts extending from an air distributor to spaced apart extremities of the wings and exiting in downward directions for stabilization, a rear air duct at the rear of the body with an air outlet for forward propulsion and directional control, and means for controlling air direction at the outlet of each of the wing ducts and at the bottom outlet duct and at the rear outlet. winding mechanism according to claim 12, wherein said rotating guide includes a plurality of number of guide members arranged in side-by-side relationship. 14. The winding mechanism according to claim 13, wherein each guide member is a cylindrical roller. pieces and four corner pieces, each of said side and end pieces of said top rail having a downwardly open channel formed between a pair of channel side walls, said downwardly open channel being fitted over said upper edges of said walls, each of said side pieces and each of said end pieces having holes extending through said downwardly open channel at opposite ends of said piece, each of said corner pieces having a pair of projections, one of said projections engaging one of holes of one of said corner pieces and the other of said projections engaging one of said holes of one of said end pieces, thereby joining one of said end pieces and one of said side pieces. 10. The tote box of claim 9 wherein at least two of said walls have tabs. 11. The tote box of claim 10 wherein at least one of said channel side walls has an inwardly extending hook for engaging said tabs and locking said top rail over said top edge of said box. 12. The tote box of claim 9 wherein said foldable box blank is made of corrugated plastic sheet. 13. The tote box of claim 9 wherein said corner enhancers and said side and end pieces of said top rail are extruded. 14. The tote box of claim 9 wherein said pieces of said top rail have a vertical lip on an outside upper edge thereof for facilitating stacking of a second tote box on top of said tote box. 15. The tote box of claim 9 wherein each of said opposed side walls have an identical first length and each of said opposed end walls have an identical second length, said first length being greater than said second length. 16. A tote box with a self-locking top rail comprising: a box formed from a foldable box blank of a uniform thickness, said box having a bottom, two opposed side walls and two opposed end walls, said side walls and end walls having upper edges defining a top edge of the box, and a top rail extending around the top edge of said box, said top rail comprising two side pieces, two end pieces and four corner pieces, each of said side pieces and each of said end pieces of said top rail having a downwardly open channel defined by a top and a pair of channel side walls extending downwardly from said top, said top of said downwardly open channel having holes formed therein, each of said corner pieces of said top rail having projections for engaging said holes of said side pieces and said end pieces of said top rail in order to lock said pieces of said top rail together. 17. The tote box of claim 16 wherein at least two of said walls of said box each have at least one tab for engaging said top rail. 18. A method of assembling a tote box with a self-locking top rail comprising four corner pieces, two end pieces and two side pieces, each of said corner pieces of said top rail having outer portions with projections, each of said side pieces and each of said end pieces of said top rail having a downwardly open channel defined by a top and two channel side walls, said top of said downwardly open channel having holes therethrough, said method comprising: folding a box blank into a box, said box having a bottom, two opposed side walls and two opposed end walls, said side walls and end walls having upper edges defining a top edge of the box, at least two opposed walls each having at least one tab, locating portions of said side and end walls of said box inside first and second open leg channels of corner enhancers, each of said open leg channels being formed between a pair of leg channel walls, and securing said corner pieces of said top rail over upper portions of said corner enhancers, securing said side and end pieces of said top rail to said corner pieces of said top rail by passing said projections through said holes of said side and end pieces of said top rail, said downwardly open channels of said side and end pieces of said top rail being placed over upper edges of said walls of said box. 19. The method of claim 18 further comprising locking said pieces of said top rail over said upper e