Did You Know...
...that the video game, Pong, was invented by a guy who graduated at the bottom of his engineering class? Nolan Bushnell spent more time running the games at a local amusement park than he did on his studies at the University of Utah. His dreams of working for Disney's amusement empire were dashed when the company wouldn't hire him. Taking a boring job, Nolan daydreamed about electronic versions of popular games. He invented Pong, the first video game, and went on to found Atari Co.
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| Number | Title | Issue Date |
| 7337690 | Leadscrew assembly with a wire-wound leadscrew and a spring-pin engagement of a drive nut to the leadscrew A leadscrew assembly includes a leadscrew having an elongated shaft with an outer lateral surface and a rotational axis, and a leadscrew thread formed of a thread wire helically wrapped in spaced-apart turns upon the lateral surface and affixed to the elongated shaf... | 03/04/2008 |
| 7313978 | Linear motion device associated to a worm A linear motion device (10) associated to a worm (14) including a body (12) internally provided with a housing seat for partially receiving a worm having a plurality of grooves, a mobile device (52) for temporary engagement in an exposed ... | 01/01/2008 |
| 7214037 | Retention of ball bearing cartridge for turbomachinery An exemplary housing for a turbocharger includes a substantially cylindrical bore having a longitudinal axis, an inner diameter, a proximate end and a distal end; a counterbore positioned at the distal end, substantially centered on the longitudinal axis and having ... | 05/08/2007 |
| 7152830 | Switch machine improvements A control mechanism for moving switch points on a railroad track, having a drive screw driven by a motor, a traveling block moving along the drive screw to position the switch points, an end stop on the drive screw for limiting movement of the traveling block, a han... | 12/26/2006 |
| 6925900 | Ball screw The ball screw comprises a shaft including a spiral-shaped shaft groove having a semicircular-shaped (Gothic-arch-shaped) section, a nut including a spiral-shaped nut ball groove which corresponds to the shaft groove and has a semicircular-shaped (Gothic-arch-shaped... | 08/09/2005 |
| 6186015 | Ball-nut transmission A ball-nut transmission in which each of the balls used for transferring drive between a shaft member and a nut member are encapsulated between a hemispherical cavity formed in one of the members and a helical groove provided in the other of the members.... | 02/13/2001 |
| 6116109 | Device for converting a rotational movement into a rectilinear movement An apparatus for converting a rotational movement into a rectilinear movement includes a threaded spindle, a nut (8) which surrounds the latter concentrically at a spacing, and a number of rolling bodies which are disposed in the spacing and roll on the t... | 09/12/2000 |
| 5426989 | Method and a device in spindles For carrying out a method to displace an object from a resting position to to a working position or vice verse, a device (1) is arranged comprising a screw (3) with two threads (7, 9) with different pitches and a body (2, 4) with internal threads matching... | 06/27/1995 |
| 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 |
| 5241874 | Ball screw A ball screw incorporates a screw shaft having a plurality of spiral grooves around its circumference. The spiral grooves are engaged by a plurality of balls in assembly units. The balls in each assembly unit are disposed in a plane that is normal to a lo... | 09/07/1993 |
| 5178030 | Non-recirculating rotary ball actuator A rotary ball actuator has a piston mounted within a body consisting of a first portion and a second portion. The piston has helical ramps which cooperate by means of first balls with helical ramps formed within the first portion, and rectilinear ramps wh... | 01/12/1993 |
| 5094118 | Splined ball screw assembly having a nested structure A splined ball screw assembly having a nested structure is provided. A hollow shaft extends into an outer sleeve and a center shaft extends into the hollow portion of the hollow shaft. A ball screw structure is provided at either side of the outer and inn... | 03/10/1992 |
| 5088339 | Limit stop assembly for a screw and nut linear actuator A screw and nut linear actuator has a threaded drive screw. A drive nut is threaded onto the drive screw and is axially translatable thereover by rotating the drive screw relative to the drive nut. The drive nut has a first member translatable along the d... | 02/18/1992 |
| 5022277 | Screw and nut machine A ball screw has a plurality of planar tracks of bearing balls arranged around the inner surface of the nut of a screw and nut machine. The shape of each track is designed to fit around a planar cross-section of the screw threads and each of the plurality... | 06/11/1991 |
| 4920817 | Ball screw with screw cage in raceway ring of nut A ball screw is provided in which the balls coacting with the screw and running in helical threads therein also run in parallel grooves of a raceway ring arranged coaxially about the screw. The grooves extend perpendicularly to the axis of the screw. The ... | 05/01/1990 |
| 4887479 | Ball cage for helical ballspline A ball cage for a helical ballspline of a mechanical movement device comprises a cage in the form of a tubular sleeve adapted to be arranged between a helically threaded inner member and a complimentary helically threaded outer member of the helical balls... | 12/19/1989 |
| 4821592 | Ball cage for a worm-and-nut type drive unit The invention relates to a ball cage consisting of a cylindrical sleeve 1 provided with ball seats 7, 8 intended to receive balls 9, 10 intended to cooperate with a worm 11. The sleeve 1 is intended to be mounted in a cylindrical tube 2. The balls 9, 10 a... | 04/18/1989 |
| 4784114 | Kitchen ventilating system A cooking or ventilating system has an extraction unit connected through an exhaust duct with the outside atmosphere, and a damper which is shiftable between positions operatively opening or closing the exhaust duct. A mechanism for opening and closing th... | 11/15/1988 |
| 4741221 | Feed and rapid return means for machine tools The combination of a lead screw and a multi-ball nut. The balls are disposed around the axis of the lead screw. The balls are mounted on the nut either to be received and retained in the valley of the lead screw thread (whereby rotation of the lead screw ... | 05/03/1988 |
| 4685344 | Helical ball gearing A helical ball gearing for converting axial or linear motion into rotary motion and vice versa. In a helical ball gearing including a rotor having at least one helical groove, a non-rotatable but axial displaceable shaft having at least one helical groove... | 08/11/1987 |
| 4199999 | Ball-type mechanical transmission A low-friction, light-load, low-cost mechanical transmission for converting rotary motion to linear motion, comprising an elongate screw shaft having a rolled thread groove, a multi-part follower nut comprising a sleeve having a through hole constituting ... | 04/29/1980 |
| 4198872 | Mechanical screw transmission A low-friction light-load mechanical transmission for converting between rotary and linear motion, comprising a screw shaft having a helical thread groove, and a nut body having a radially movable socket member in which there is received a thread-engaging... | 04/22/1980 |
