Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7350474 | Sailing device A sailing device suitable for a pleasure boat or the like of narrow width which is small in restoring force against traverse tilt. The sailing device is characterized by comprising a sail portion A composed of a backbone, a pair of left and right spars 3a,... | 04/01/2008 |
| 7270067 | Wheel-controlled sails The present invention simplifies sailing providing control of one or more sails with a wheel. The proposed system eliminates the need to control boom-footed sails separately, giving benefits of less gear and rig for short handed sailing. The wheel controlling the sa... | 09/18/2007 |
| 7014142 | Low-drag rotor/wing flap Rotor/wing aircraft having a low-drag flap are disclosed. In one embodiment, a rotor/wing aircraft includes an elongated blade having a body portion and a flap portion. The body portion has first and second edges and includes a non-symmetric portion proximate the se... | 03/21/2006 |
| 6932010 | Sailboat with offset boom A sailboat comprising a hull with a mast has a rotatable strut that supports a continuous boom and holds the boom far enough away from the mast to allow clear air flow over the sail on either tack. The support for the boom at the end of the strut is tubular to allow... | 08/23/2005 |
| 6691632 | Sailing craft stable when airborne A wind propelled vehicle comprising: (a) an assembly of airfoils fixedly joined; (b) all-moveable rudder and horizontal stabilizer, or suitable substitute, for aerodynamic yaw and pitch control; and (c) pontoons and hydrofoils, skis, skates, runners or wh... | 02/17/2004 |
| 6675735 | Hydrofoil sail craft A sailing craft including a single hydrofoil assembly, an aerofoil assembly, and a hull assembly with a rigid beam interconnecting the hydrofoil assembly, the aerofoil assembly, and the hull assembly. The hull is separate and displaced from the hydrofoil ... | 01/13/2004 |
| 6141809 | Wing profile sail A wing profile sail is in the form of a sailcloth which defines an airfoil-shaped space, which is filled with air through openings or one-way closing mechanisms. At the sail's luff (1) there is provided a bag/lung-shaped body which can be filled with air ... | 11/07/2000 |
| 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 |
| 5435259 | Rein-deer kite and its control systems What has been created is a new device that is used to take benefits from the energy of the high altitude winds for purposes of doing work and to produce usable and storable energy such as electricity, compressed air, etc., without using fuel. This device ... | 07/25/1995 |
| 5113775 | Aero hydrofoil sail boat A high-speed, ultrastable, wind propelled watercraft employs an airfoil for propulsion and buoyant hydrofoils for support. A buoyant keel/rudder is rotatably mounted to a boom which horizontally projects from near the base of the airfoil. Both the airfoil... | 05/19/1992 |
| 5063869 | Wing type sailing yacht A wing type sailing yacht is constructed to incorporate the airfoil principle. Such a yacht has a boat hull, a mast, and a sail, including a bow with a bow keel and a stern with a stern keel. Each keel has a buoyancy control fin (9, 10) at its lower end. ... | 11/12/1991 |
| 5046440 | Sail rig and staysail system A sail rig for a sailing vessel or a vessel provided with auxiliary sail propulsion comprises a mast, a continuous yard/boom provided on the mast, a backstay, a main sail located between the mast and the backstay, a forestay and a foresail mounted on the ... | 09/10/1991 |
| 4947775 | Water air interface vehicle A water and air supported vehicle propelled by the wind. The vehicle includes a long narrow hull (30) that displaces water at low speeds and a plurality of hydrolfoils (36) distending from the hull in communication with the water resisting lateral loads a... | 08/14/1990 |
| 4924794 | Sail In its preferred form the present invention comprises an aerofoil sail having tensioned battens and an internal web structure to maintain an aerodynamically efficient shape.... | 05/15/1990 |
| 4848258 | Airfoil sailing system An airfoil system for use on water vessels is described. A plurality of fore and aft symmetrical sails are arranged to form an asymmetrical two surface airfoil. The individual sails may be rotated to allow tacking. The parameters of sail configurations de... | 07/18/1989 |
| 4843987 | Heel counteracting airfoil A wing type airfoil is used to propel a vessel. The airfoil comprises a mast, a counterbalancing airfoil and a driving airfoil. The mast is elongate and has upper and lower portions, the lower portion is adapted to be connected to the vessel and extends u... | 07/04/1989 |
| 4796554 | Sailboat The invention relates to a sailboat in which the hull is defined by cross-sections forming equilateral triangles standing on one tip with convex sides and which continuously decrease in size toward the bow and stern so that the keel line and the side edge... | 01/10/1989 |
| 4708075 | Multi-hull sailboat with fixed airfoils A three hulled sailboat consists of a tripod frame having three downwardly inclined spars which define support points at their distal ends. During the sailing of the boat, one support point is always toward the windward, and the other two support points a... | 11/24/1987 |
| 4703707 | Sails and sailing vessels A sail assembly comprising a mast, spaced apart lateral upper and a lower elongated members fixed to the mast, a track joining first ends of the upper and lower members, two panels of sail material one to each side of the mast connected to the track by ru... | 11/03/1987 |
| 4685410 | Wing sail An airfoil sail system for a boat having a mast is disclosed. The airfoil sail system includes a front airfoil which is pivotal about an axis defined by the mast. The front airfoil has leading and trailing edges, and is generally symmetrical about a verti... | 08/11/1987 |
| 4637331 | Sail and sailing rig A sail and sailing rig smoothes the flow of air past a conventional mast and onto the sail, thereby enhancing the power of the sail. The sail includes a sail body having a mast-enveloping portion located at its luff in the form of a sleeve or a plurality ... | 01/20/1987 |
| 4624203 | Batten structure for a wing sail The invention provides a batten structure which can be placed inside a double sided sail to provide a so-called "wing" sail having an airfoil section which can be close to an ideal airfoil on either tack. The structure includes a central beam which engage... | 11/25/1986 |
| 4562784 | Sailing craft A sailing craft having hydrodynamically shaped catamaran hulls and tapered configuration rudder assemblies attached to each hull. Low draft keels are attached to the fore one-half bottom portions of the hull and a pitch-sensitive variable camber mast and ... | 01/07/1986 |
| 4530301 | Variable camber air-foil for a vessel The present invention entails a variable camber airfoil assembly mounted on a vessel and having a pivotably mounted rigid leading edge member. The rigid leading edge member includes an elongated generally V-shaped member that extends substantially the ent... | 07/23/1985 |
| 4473023 | Relating to wingsail craft and wingsails therefor A wingsail assembly in which the pivoting mounting is situated in line with a strengthened portion of the sail assembly such as a strengthened leading edge of a sail element while still retaining the alignment of the axis of pivoting and the center of pre... | 09/25/1984 |
| 4463699 | Sailing craft A sailing craft having hydrodynamically shaped catamaran hulls and tapered configuration rudder assemblies attached to each hull. Low draft keels are attached to the fore one-half bottom portions of the hull and a pitch-sensitive variable camber mast and ... | 08/07/1984 |
| 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 |
| 4432298 | Hydrofoil sailing craft A hydrofoil sailboat comprises forward and aft surface piercing hydrofoils and an asymmetrical wingsail. Both hydrofoils have an inverted arch configuration and have a cross-section which is approximately a circular segment. The wingsail has a reversible ... | 02/21/1984 |
| 4386574 | Sail assembly of variable profile, reversible and collapsible A sail assembly of variable profile, reversible and collapsible, comprising a mast on which are mounted ribs set apart one from the other, each one being constituted of two flexible laths joined together by hinge members, the ribs being covered with a sup... | 06/07/1983 |
| 4263861 | Sailing craft In a sailing craft, in which the foot of a sail is attached to a yard pivoted on a boom, itself pivoted on the mast, this sail, provided to be of single or double-thickness, preferably comprising a sectioned front edge, restraints are provided for selecti... | 04/28/1981 |
| 4230060 | Sailing system A mast is mounted onto a boat for 360° rotation about its longitudinal axis, relative to the sailboat and the rigging for the mast. The rigging braces the mast against buckling and comprises a masthead, a transverse spreader bar and shrouds. A forwardly ... | 10/28/1980 |
| 3934533 | Aerofoil or hydrofoil A reversible aerofoil or hydrofoil has a central panel with lateral panels hinged thereto. The section of the central panel is symmetrical on either side of a central axis and the lateral panels are of similar section to each other. Either of the lateral ... | 01/27/1976 |
