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 |
| 7412910 | Mechanism for transforming a rotational movement into a linear movement A mechanism for transforming a rotational movement into a linear movement, comprising a non-deformable nut, that is prevented from rotating but not from axially moving, a radially deformable tubular screw, having freedom of rotation but not of axial movement and hav... | 08/19/2008 |
| 7210369 | Ball screw drive In a ball screw drive comprising a spindle nut (2) that can be disposed on a spindle (1), said spindle nut (2) comprising on an inner periphery, a ball groove (3) that is arranged along a helix and defines a load-bearing channel (6... | 05/01/2007 |
| 6991573 | Steering actuator of independent steer-by-wire system A steering actuator of an independent type steer-by-wire system comprises a housing fixed to a vehicle body and an ultrasonic motor. The ultrasonic motor has a stator internally fixed to the housing and a rotator rotating relative to the stator when an electric curr... | 01/31/2006 |
| 6968753 | Vibration-dampening base for ball-type lead screw of load port transfer system A vibration-dampening base for a ball-type lead screw of a load port transfer system is disclosed. A load port transfer system includes a vertical arm drive motor assembly, a ball-type lead screw, and a vibration-dampening base connecting the vertical arm drive moto... | 11/29/2005 |
| 6823756 | Displacement unit A displacement unit for at least one element to be displaced is provided comprising a drive unit, a transfer element that is caused to move by the drive unit and that comprises a thread or a tooth set, and an engagement element, which engages into the thread or toot... | 11/30/2004 |
| 5913940 | Adjustable preload anti-backlash nut An anti-backlash nut designed to translate along a lead screw in two longitudinal directions is disclosed. The nut has one or more longitudinal flexure members each having one end fixed to the nut and the other one free floating. Internal threads are form... | 06/22/1999 |
| 4974464 | Motorized anti-backlash linear actuator A motorized anti-backlash actuator having an externally threaded rod (18) movable linearly while in rotational engagement with an inwardly threaded anti-backlash nut portion (10) and an armature (8) fixed to the nut and rotatable therewith. A field coil (... | 12/04/1990 |
| 4966045 | Powered six-way seat adjustor and mechanisms therefor A load bearing structural assembly comprising a threaded lead screw having a central axis, the lead screw having a mounting mechanism and an anchor mechanism affixed to one end thereof; the lead screw having mounted thereon a first drive nut having an ope... | 10/30/1990 |
| 4753122 | Screw-nut type mechanism A screw-nut type driving mechanism having a rotatable screw shaft, a nut engaged with the screw shaft and a driven member secured to the nut. The nut has an axially tapered outer surface which is formed with external threads. The driven member has an inte... | 06/28/1988 |
| 4593572 | Lubricated drive mechanism A sealed, precision screw feed device for equipment of the type having a stationary base and a reciprocating carriage member. The device has an elongate tubular housing carrying a shaft with a precision thread, one end of the shaft projecting from one end... | 06/10/1986 |
| 4210033 | Anti-backlash nut An anti-backlash nut is disclosed of the type which undergoes translational movement along a screw in response to relative rotational movement between the nut and screw. This anti-backlash nut has oppositely-directed longitudinal flexure members radially ... | 07/01/1980 |
