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 |
| 6655228 | Dual directional power feed The present invention discloses a dual directional power feed for use with handheld drills or stationary frame mounted power sources. The device comprises a housing, two pairs of wheel bearings rotatably mounted to the housing, a cap rotatably mounted to ... | 12/02/2003 |
| 6568293 | Linear drive An apparatus for producing linear motion from rotary motion is disclosed comprising a drive rod (10) of circular cross section which is arranged to be rotated at a constant speed in the same direction. A carriage (11) which is arranged to be mounted on th... | 05/27/2003 |
| 6111491 | Magnetic screw A magnetic screw having a screw shaft of magnetic material having thread crests formed on the outer peripheral surface thereof, and a magnetic nut fitted on the outer periphery of the screw shaft. The magnetic nut includes annular permanent magnets magnet... | 08/29/2000 |
| 5990587 | Low friction, high precision actuator In one embodiment, a device for generating ultra-high precision rectilinear movement based on aerostatic suspension and magnetic traction, the device including a nut, a leadscrew, a thrust bearing, a contactless motor, and feedback drive electronics. The ... | 11/23/1999 |
| 5931438 | Displacement adjustment device A displacement adjustment device (100) for at least partly converting a rotation into a translation, comprising: a rotation input member (114) which is bearing-mounted so as to be rotatable but axially secured relative to a frame said rotation input membe... | 08/03/1999 |
| 5832776 | Leadscrew assembly with a no-grooved shaft A leadscrew assembly includes a cylindrical no-grooved shaft and a nut body similar to a conventional ballscrew and nut assembly of internal recirculating steel balls. This newly developed device according to the invention has outstanding features such as... | 11/10/1998 |
| 5751083 | Magnetic screw conveying apparatus A magnetic screw conveying apparatus comprises a rotary shaft 11 rotatably supported, a stepmother 19 for driving the rotary shaft 11 to rotate, a male magnetic screw 15 having magnetized bands with a south pole S and a north pole N alternately magnetized... | 05/12/1998 |
| 5687614 | Magnetic screw device This magnetic screw device comprises a screw shaft made of magnetic material and having thread ridges formed on the outer peripheral surface thereof, and a nut body fitted on the screw shaft with a clearance defined therebetween. The nut body comprises a ... | 11/18/1997 |
| 5634390 | Rotary actuator Disclosed is a rotary actuator utilizing magnetic screws which are stably rotatable at a great torque with little torque variation. The rotary actuator comprising (a) a closed hollow cylinder, a piston sliding within the cylinder, and a rotary shaft which... | 06/03/1997 |
| 5456134 | Magnetic transmission mechanism and applications thereof A transmission mechanism for converting a rotary movement into a translatory movement includes an internal and an external coupling member which have cooperating double thread systems made of a magnetizable material. The external coupling member includes ... | 10/10/1995 |
| 5444348 | Electric jack having a rotation-translation movement conversion system and with energy recovery An electric jack of the type used in robotics having a rotation-translation movement transformation system, at least one electric motor connected to the movement transformation system, means for controlling the electric motor for driving the movement tran... | 08/22/1995 |
| 4141255 | Mechanism for transferring a rotary motion into an axial motion A mechanism for transferring a rotary motion into an axial motion. The assembly includes a shaft having a smooth, cylindrical envelope surface, a retainer enclosing the shaft and rotatable relative the shaft. A plurality of bearing housings with bearing s... | 02/27/1979 |
