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| Number | Title | Issue Date |
| 7793561 | Threaded nut means for a linear drive device A threaded nut is provided for a linear drive having a rotatable spindle. The threaded nut is provided with a main nut, wherein the main nut is intended for being arranged with its internal thread on the external thread of the spindle, and is intended to perform a t... | 09/14/2010 |
| 7458292 | Catch nut A threaded drive has a threaded spindle having a longitudinal axis, a supporting nut which is in a screw engagement with the threaded spindle with a first clearance and which is rotatable relative to the threaded spindle about the longitudinal axis, a catch nut whic... | 12/02/2008 |
| 7278333 | Ball screw device A ball screw device has a screw shaft which has a shaft rolling groove in a spiral shape formed on an outer surface of the screw shaft, a nut which has a nut rolling groove formed on an inner surface of the nut and opposed to the shaft rolling groove, wherein the sc... | 10/09/2007 |
| 7219570 | Long-span lead screw assembly with anti-backlash nut A lead screw assembly having a lead screw rotatable within a hollow tubular portion of a reinforcing rail. A nut engages with threads of the lead screw and is movable along the reinforcing rail. The lead screw includes plurality of first threaded portions having an ... | 05/22/2007 |
| 7143661 | Leadscrew mechanical drive with differential leadscrew follower structure and brake A leadscrew mechanical drive includes a leadscrew having a leadscrew axis and a leadscrew thread with a nonzero leadscrew thread pitch. A leadscrew follower structure is engaged to the leadscrew. The leadscrew follower structure includes a first leadscrew follower a... | 12/05/2006 |
| 7089819 | Linear guide apparatus A ball screw has a screw shaft including a screw groove formed in an outer peripheral surface thereof; a nut including a screw groove formed in an inner peripheral surface thereof and screwed together with the screw shaft through a large number of balls rollably dis... | 08/15/2006 |
| 6880416 | Device for adjusting parts which can move in relation to each other A device for adjusting parts which can move in relation to each other includes: a driveable threaded hollow spindle with inner and outer threads increasing in opposing directions; an inner spindle cooperating with the inner threads and connected to a first fixing de... | 04/19/2005 |
| 6691587 | Actuator Actuators for subsea downhole chokes have tended to include hydraulic pistons which are prone to failure and crude in accuracy. The invention provides an actuator (1) having first and second rotary motors (2, 16) and an output region (3) arranged to engag... | 02/17/2004 |
| 6516680 | Power steering apparatus A power steering apparatus comprises a rotary cylinder supported with its movement in the axial direction restrained and rotated coaxially with the steering shaft by the force a transmitted from the motor for assisting steering, a plurality of feed rings ... | 02/11/2003 |
| 6467362 | Reinforced lead screw with spring biased anti-backlash nut An anti-backlash nut is assembled on a reinforced lead screw for bilateral motion lengthwise of the lead screw as the screw is rotated. A hollow, elongate reinforcing rail extends lengthwise of and surrounds the lead screw. A slot in the rail extends leng... | 10/22/2002 |
| 6422101 | Reinforced lead screw with springless anti-backlash nut An anti-backlash nut assembly is on a reinforced lead screw having a threaded lead screw rotatable about a central axis. A hollow, elongated reinforcing rail extends lengthwise of and surrounding the lead screw. The reinforcing rail has a slot extending l... | 07/23/2002 |
| 5909835 | Gripper feeder for metal strip A gripper feeder for metal strip including on a base one pair of grippers for an engagement of a metal strip to be advanced; members for moving said grippers in a direction parallel to an axis of the strip and in the opposite direction; and means for inde... | 06/08/1999 |
| 5906136 | Ball screw lubricated with oil-containing polymer Nut 2 in threadable engagement with the screw shaft 1 of a feed screw apparatus is fitted with a lubricant supply device 30 which also serves as a seal. This device is made of a lubricant-containing rubber or synthetic resin and has a plurality or project... | 05/25/1999 |
| 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 |
| 5732596 | Anti-backlash nut assembly An anti-backlash nut, movable along a rotatable screw. The nut has internal threads complementary to the threads in the screw. The nut has two nut halves movable as a unit and also rotatable relative to each other on the screw. Means are connected to the ... | 03/31/1998 |
| 5697252 | Preliminary thrusting mechanism for a screw device A preliminary thrusting mechanism for a screw device serves to achieve not only constant position type preliminary thrusting but also constant pressure type preliminary thrusting. The preliminary thrusting mechanism includes as essential components a scre... | 12/16/1997 |
| 5644951 | Feed screw apparatus and precise positioning and fine feed system A feed screw apparatus comprises a fixed member, a feed screw shaft rotatably supported to the fixed member, a nut mounted to the feed screw shaft and a movable member attached to the nut, wherein a force is transferred from the fixed member through the f... | 07/08/1997 |
| 5634376 | Transfer unit A first motor is fitted to a threaded shaft onto which first and second nuts are screwed, a first holder to which a second motor for rotating the first nut is fixed is fitted to the shaft, the first holder is provided with a first bracket to which one end... | 06/03/1997 |
| 5582072 | Preliminary thrusting mechanism for a screw device A preliminary thrusting mechanism for a screw device serves to achieve not only constant position type preliminary thrusting but also constant pressure type preliminary thrusting. The preliminary thrusting mechanism includes as essential components a scre... | 12/10/1996 |
| 5531557 | Drive screw system with nested mobile supports The drive screw system comprises a drive screw and a drive nut adapted for driving a cooperating member such as a vehicle restraining device between the proximal and distal ends of the drive screw. At least one bearing assembly is mounted to a track for s... | 07/02/1996 |
| 5513741 | Proportional spacing mechanism with assisted drive A proportional spacing mechanism proportionally spaces objects from a reference position on a fixed support frame. At least one supplemental drive mechanism assists the proportional spacing mechanism in moving the coupling elements and respective objects ... | 05/07/1996 |
| 5510937 | Apparatus for adjusting intermeshing angle in feed screw mechanism An apparatus for adjusting an intermeshing angle of a pin and feed screw in a mechanism in which rotational movement of a feed screw is converted to a linear movement of the pin. The apparatus includes at least one pin which is in mesh with the feed screw... | 04/23/1996 |
| 5367915 | Automatic pressure control device for a ball screw Varying fluid pressure varies the thickness of an elastic spacer between ball nuts of the ball screw. The spacer thickness determines opposed axial forces applied to the ball nuts. During a high-speed excursion of the screw, pressure in the elastic spacer... | 11/29/1994 |
| 5306136 | Mold clamp driving apparatus In a drive apparatus for a toggle-type mold clamping mechanism of a vertical injection molding machine, a drive motor movably supported on a guide table via rollers moves horizontally following the vertical movement of a ball screw, when a mold is opened ... | 04/26/1994 |
| 5129279 | Flexible robotic limb This invention is a flexible limb capable of changing length, bending in any direction, twisting, and changing cross-sectional size. Its skeletal structural design promotes optimal simplicity of control, ease of construction, lightness, and stiffness.... | 07/14/1992 |
| 4799734 | Linear device for rapidly adjusting and immobilizing a movable part relative to a fixed part This device comprises at least one pair of screw-and-nut elements cooperative with the fixed and movable parts in respect of which elements the screw angle is large enough to ensure that the efficiency of the translation to the rotation is slightly positi... | 01/24/1989 |
| 4730503 | Linear differential mechanism A differential mechanism including a housing, an elongate shaft disposed in the housing which is coupled to an object to be moved with the shaft defining a ring-handed thread along a first portion thereof and a left-handed thread along a second portion th... | 03/15/1988 |
| 4516509 | Office furniture with an adjustable tabletop in modular design for setup at the work place This piece of furniture is designed for setup at the work place in a modular design concept and has an adjustable tabletop. At the rear edge of the tabletop (1) there is at least one bolt (27) with a projecting end which passes through a vertical slit (29... | 05/14/1985 |
