Bizarre Patents
An aircraft having vertical takeoff and landing capability provided with at least first and second laterally extending paddle wheels rotatable on a central axis perpendicular to the longitudinal axis of the aircraft fuselage and between its nose and tail.
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| Number | Title | Issue Date |
| 7992460 | Drive device A drive device for a hatch of a motor vehicle, wherein a spindle drive is provided with a threaded spindle and a spindle nut mounted on the threaded spindle, by which drive the first fastening element and the housing tube can be driven axially relative to each other... | 08/09/2011 |
| 7421922 | Device for linearly moving a useful mass A device for linearly moving a useful mass is described. Typically, when a large useful mass is moved, relatively large forces are transferred by a spindle or a toothed rack to the corresponding machine or machine frame. These forces can be compensated by moving a c... | 09/09/2008 |
| 6955468 | Linear-motion device and ball screw A linear-motion device has: a linear-motion element fitted on a shaft which moves straight along the shaft; a plurality of balls which are retained in a ball groove formed on the inner side of the linear-motion element and roll over between the ball groove and the s... | 10/18/2005 |
| 5373754 | Ball screw A ball screw that, together with contributing to reduction of the cost of the device wherein it is incorporated as a feed mechanism, eliminates the need for adjustment work performed to maintain the operation state of the object being operated, for exampl... | 12/20/1994 |
| 5337627 | Ball screw A ball screw comprising a screw shaft and a nut into which the screw shaft is screwed through a multiplicity of balls, the screw shaft having thereon a series of alternate threads and grooves changing partly in pitch, a flexible ball receiver provided int... | 08/16/1994 |
| 4898043 | Variable ratio steering mechanism Variable ratio steering mechanism comprising a body in which is rotatably mounted an input shaft, a drive shaft having a longitudinal axis, and coupled to the input shaft so as to be rotatable therewith, an output member slidably mounted in the body, a sc... | 02/06/1990 |
| 4503725 | Bracing device for machine tools A bracing device for machine tools which is formed with a compensation unit having a housing with threaded pins arranged in the housing rotatably displaceable relative thereto with a hydraulic rotary drive being provided for actuating the threaded pins.... | 03/12/1985 |
| 4186615 | Steering gears An improved steering apparatus is utilized to turn a steerable wheel of the vehicle. The apparatus includes an axially movable push rod or force transmitting member which is connected with the steerable wheel of a vehicle. A screw thread is formed on the ... | 02/05/1980 |
