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Title: US5833174: Billowing rotary kite
[ Derwent Title ]

Country: US United States of America

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10 pages

Inventor: Knight, Carl E.; San Francisco, CA 94116
Knight, JoAnn F.; San Francisco, CA 94116

Assignee: None

Published / Filed: 1998-11-10 / 1996-06-21

Application Number: US1996000667432

IPC Code: Advanced: B64C 31/06;
Core: B64C 31/00;
IPC-7: B64C 31/06;

ECLA Code: A63H27/08B;

U.S. Class: Current: 244/155.A; 244/153.A; 446/217;
Original: 244/155.A; 244/153.A; 446/217;

Field of Search: 244/153 A,153 R,155 A,155 R,33,34 A 446/217,34,36,61,62

Priority Number:
1996-06-21  US1996000667432

Abstract:     An improved billowing rotary kite is provided. The rotary kite includes a hollow, collapsible wind receiving surface. An air inlet end of the wind receiving surface is retained open by a collapsible and adjustable frame affixed to the surface on a leading edge of the inlet end. Air flow through the kite is controlled by a flexible trailing edge at an air outlet end of the surface. The flexible trailing edge comprises a plurality of longitudinal vanes that extend about the air outlet end of the surface. The fully collapsible surface, and collapsible and adjustable frame, provide a rotary kite that is fully collapsible for packaging or stowage purposes. The depth of the frame is adjustable for obtaining the highest possible rotative flight characteristics and rotative diving capabilities of the kite. In flight, air currents pass through the air inlet end of the kite, through the surface along a longitudinal axis thereof, and out the outlet end. As air currents pass through the surface, the currents strike the vanes, which increases the air pressure within the surface, causing the kite to billow. Therefore, air billows the surface to retain the kite's shape, thus obviating the need for a longitudinal frame. The configuration of the vanes also causes the kite to rotate about its longitudinal axis while in flight.

Attorney, Agent or Firm: Hill, Robert Charles ;

Primary / Asst. Examiners: Grant, William;

Maintenance Status: E3 Expired  Check current status

INPADOC Legal Status: Show legal status actions

Family: None

First Claim:
Show all 15 claims
What is claimed is:     1. A billowing rotary kite suitable for flight and rotation in a direction perpendicular to the wind flow comprising:
  • a hollow, symmetrical, collapsible wind receiving surface, the surface having an air inlet end and an air outlet end, and a longitudinal axis;
  • an adjustable and collapsible frame means secured to the air inlet end of the wind receiving surface, the frame means including a central flexible hub with a plurality of connecting members coupling the hub to the air inlet end of the surface; and
  • a plurality of collapsible vanes formed about the periphery of the outlet end of the wind receiving surface along a trailing edge thereof and spatially positioned thereabout, the vanes being configured to induce rotation of the wind receiving surface perpendicular to the longitudinal axis thereof as air currents pass through the surface while the kite is in flight, as air currents pass through the surface, the vanes increasing the air pressure within the hollow wind receiving surface for causing the kite to billow for retaining the shape of the wind receiving surface and for supporting the air outlet end in an open condition.

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Description: Show description

Forward References: Show 11 U.S. patent(s) that reference this one

U.S. References: Go to Result Set: All U.S. references   |  Forward references (11)   |   Backward references (8)   |   Citation Link

Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 4pp US2835462* 1958-05 Martin    
Get PDF - 4pp US3954236  1976-05 Brown   Wind actuated rotatable tubular device
Get PDF - 4pp US4078745  1978-03 Knight   Rotary kite
Get PDF - 10pp US4624648  1986-11 Waters  Catch the Wind Kite Shops, Inc. Aerial toy
Get PDF - 4pp US4685642  1987-08 Schloss   Rotary kite
Get PDF - 4pp US4830313  1989-05 Cheng   Kite with improved structure
Get PDF - 5pp US5234182  1993-08 Renecle   Kite
Get PDF - 7pp US5529266  1996-06 Knight et al.   Kite
  * some details unavailable
Foreign References:
Publication Date IPC Code Assignee   Title
  CA0693597 1964-09       

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