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| Number | Title | Issue Date |
| 7712427 | Apparatus for control of pivoting wing-type sail A steerable wing-type sail system for a wind powered craft. The system includes first and second secondary airfoils and that are spaced outwardly to the sides of the plane of the main wing, and that are positioned rearwardly of the trailing edge of the wing. The sec... | 05/11/2010 |
| 7673576 | Aerodynamic lift enhancement gate valve An aerodynamic lift enhancing gate valve assembly comprising an airfoil blade disposed at a leading edge of a sail, forming a gate between the trailing edge of the airfoil blade and the leading edge of the sail. The airfoil blade captures wind and redirects it over ... | 03/09/2010 |
| 7338011 | Method making it possible to prevent vibration of a rudder of an aircraft and aircraft using this method A method for preventing vibration of a rudder of an aircraft may have, on a lateral aerodynamic surface of the aircraft's rudder, a protruding aerodynamic element capable of generating an aerodynamic effect tending to rotate the rudder about its articulation axis. A... | 03/04/2008 |
| 7278366 | Method and apparatus for increasing sail efficiency A method and apparatus for increasing sail efficiency is disclosed. The apparatus comprises a second sail, disposed in a second plane substantially perpendicular to the first plane, wherein the second sail is disposed proximate a periphery of the first sail. ... | 10/09/2007 |
| 6969160 | Ballistic aerosol marking apparatus A toner gating apparatus for supplying toner through an aperture to a gas channel having a propellant stream. The toner gating apparatus has a traveling wave grid having electrodes. A first gating electrode is located proximate a first side of the aperture. A second... | 11/29/2005 |
| 6926491 | Vertical axis wind turbine with controlled gybing A device for generating electricity in which wind blowing from any direction causes the rotation of sails around a vertical tower. As the sails rotate the sails moving toward the wind are automatically feathered, and the sails moving away from the direction of the w... | 08/09/2005 |
| 6807919 | Mastless kayak sail A mastless sail for use in a two-seat kayak is disclosed. The apparatus is designed with a boomstick feature for supporting and controlling the bottom of the sail. The existing kayak paddles support and control the top of the sail. The apparatus is also designed for... | 10/26/2004 |
| 6684802 | Serrated leech flaps for sails In an improved sail for a sailboat, the trailing edges of a pair of serrated flaps of sailcloth are attached to the trailing edge of the sail, one on each side; the leading portions of corresponding members making up the serrated flaps are not fixed to th... | 02/03/2004 |
| 6170421 | Apparatus for sails A sail envelope has an internal mast or spar and one or more profiles (1) that is or are free to rotate relative to the longitudinal axis of the mast. Each profile has an outer edge in the form of a symmetrical aerofoil upon which the inner sides of the e... | 01/09/2001 |
| 6116178 | Sail A sail has a main sheet mounted to a mast; a leading vane on the other side of said mast from said main sheet and pivotally connected thereto; a trailing vane attached to the longitudinal edge of said main sheet remote from said mast; and an angled dual-l... | 09/12/2000 |
| 6070545 | Sails for sailboats having self-tacking leech flaps In an improved sail for a sailboat, the trailing edges of a pair of flaps of a conventional sail material are attached to the trailing edge of the sail, one on each side; the leading edges of the flaps are not fixed to the sail, but are connected to one a... | 06/06/2000 |
| 5937778 | Sail A sail has a main sheet mounted to a mast; a leading vane on the other side of said mast from said main sheet and pivotally connected thereto; a trailing vane attached to the longitudinal edge of said main sheet remote from said mast; and an angled dual-l... | 08/17/1999 |
| 5732642 | Windsurfer sail device A windsurfer sail with an extendable wind range and easier uphauling capability. Sealable openings on the body of the sail provide for adjustability by the operator.... | 03/31/1998 |
| 5123368 | Laminar air-flow sail Rows of closely spaced apertures are installed in a sail to control boundary layer air flow over a sail to laminar flow type by "bleeding" high energy air from the windward or concave side of the sail through the apertures to the convex or leeward side of... | 06/23/1992 |
| 5074234 | Vortex generators for sails A vortex generator for attachment to the surface of a sail of a sailboat made from a strip of foldable material such as sail cloth or film that has a central member formed of two panels of the strip joined together by pressure sensitive adhesive and a foo... | 12/24/1991 |
| 5031560 | Sail construction A panel construction for bleeding high pressure air from the windward side of a sail to the leeward side of the sail to improve air flow over the leeward side and thereby reduce the heeling component and enhance the thrust component of the aerodynamic for... | 07/16/1991 |
| 4972789 | Mast for sailboats The invention concerns a mast for sailboats, apt to support two distinct sailcloths forming a wing sail. According to the invention, the mast comprises a tubular body which has a cross section divided in two parts by an axis transversal to the longitudina... | 11/27/1990 |
| 4951589 | Mainsail construction facilitating airflow thereover An improved mainsail construction having a barrier extending laterally outward from the mainsail and the mainsail boom to prevent flow of air from the high pressure side to the low pressure side of the sail and thus improve efficiency thereof. The barrier... | 08/28/1990 |
| 4811678 | Sailboat sail with a full-width, full-depth, horizontally outstanding shield located at an intermediate level A sail (1) for sailing-boats which is provided with a shielding device (3) arranged substantially horizontally on the sail (1). The shielding device at least partly bridges the concavity formed on the upwind surface of the sail when the wind fills the sai... | 03/14/1989 |
| 4803939 | Slot-forming foil construction for sailing yachts A slot-forming foil enhances the performance of sailing yachts without jibs. A two-part foil is provided, including a forward foil section and an aft section pivoted to the forward section and having alternate, toggled working positions. In either working... | 02/14/1989 |
| 4669409 | Wind ship propulsion system A sailing rig which comprises a rigid airfoil, with intakes on either side of its front. Air is drawn through the leeward intake into a front compartment, then by fan to a pressurized rear compartment, where it exits via a rearwardly directed jet nozzle o... | 06/02/1987 |
| 4437425 | Air flow direction indicator An airflow direction indicator in accordance with the invention is intended for sailboards, in which the front portion of the sail includes a tunnel which is slipped onto the mast and is rotatable relative thereto when varying the sheeting and curvature o... | 03/20/1984 |
| 4437426 | Wing type air foil assembly The present invention relates to a wing type air foil assembly that is adapted to be utilized by boats or vessels, or even vehicles, that is designed to function in the same general manner as a wind sail for providing driving thrust to the vessel or vehic... | 03/20/1984 |
| 4344377 | Sail craft A device for increasing the motive force of a sail acting on a sail craft and at the same time decrease the risk of having the craft turned bottom up after a capsizing are obtained by fastening to the uppermost portion of the sail (3) a certain amount of ... | 08/17/1982 |
| 4122792 | Aerodynamic device, particularly for sails An aerodynamic device mounted to a mainsail at the area of maximum air activity includes a venturi and a plurality of vertically disposed strips or offsets defining extending fins. The flow axis of the venturi is substantially parallel to the foot of the ... | 10/31/1978 |
