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6397697 |
Ball screw
In a ball screw according to the present invention, four circulation passages forming a circulation route are respectively arranged in the axial direction of the ball screw. The mounting positions...
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6389915 |
Dual load path ball screw with rod end swivel
A dual drive ball has a ball screw shaft coupled at one end to a gear train and coupled at the other end to a ball screw nut. The ball screw shaft and ball screw nut are connected through...
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6378646 |
Pivotal ballnut connection for a power assisted steering system
The present invention is directed to a power assisted steering system ( 10 ). The power assisted steering system ( 10 ) comprises a rotatable member ( 34 ) capable of rotating about an axis. The...
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6370978 |
Apparatus for converting a rotary motion into an axial motion
An apparatus for converting a rotary motion into an axial motion, is used as overload protection; the force transmitting elements of the conversion apparatus, in the form of a threaded spindle, a...
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6364058 |
Lubricant supply device
A lubricant supply device is to be fitted to a nut member engaging with a screw shaft through rolling members to supply lubricant to the screw shaft along with a relative rotational motion of the...
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6346788 |
Actuator and apparatus for controlling the same
A moving member 18 of an actuator 10 comprises a moving block 50 wherein an opening 48 which allows a driving force transmission shaft 16 to be inserted from the direction perpendicular...
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6334370 |
Ball screwed nut, linearly guiding apparatus using the same, ball screw for steering and method of manufacturing the ball screwed nut
A ball rolling groove 1 c is defined in an inner peripheral surface of A ball screwed nut 1 by a rolling process, not by a grinding process so that a ball screwed nut having small diameters or...
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6318202 |
Transmission for driving the screws of a twin-screw extruder
A transmission for driving the screws of a twin-screw extruder comprises two parallel output shafts (1, 2) of different lengths and rotating in opposite directions, the shorter one of which carries...
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6318201 |
Motor vehicle differential bearing pre-load mechanism
A motor vehicle differential bearing pre-load mechanism which provides for the simultaneous use of a collapsible spacer which plastically deforms and has a close to linear load to deflection band...
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6301986 |
Gear arrangement, especially for a double screw extruder
A gear arrangement, especially for a double screw extruder, has a drive shaft and at least one driven element, wherein the driven element is in active connection, at least indirectly, with two...
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6286383 |
Ball screw device
This invention relates to improvement of a ball screw unit in which a nut member meshes with a screw shaft via a plurality of balls circulating endlessly. The balls are disposed freely rotatably in...
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6282971 |
Ball screw
A ball screw comprises a screw shaft formed on an outer peripheral surface thereof with a spiral ball rolling groove, a nut member having an inner peripheral surface on which a spiral loaded ball...
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6276223 |
Motor-operated cylinder
A motor-operated cylinder is provided, wherein the rotational movement of the output shaft of a motor is converted into a linear movement by a thread mechanism 3, with the least possible load...
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6276225 |
Ball screw assembly
A ball screw assembly includes a screw shaft with a spiral groove, balls along the groove, a nut with the screw shaft relatively rotatable with the balls, and a seal device. A portion of each seal...
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6247846 |
Rolling element and rectilinearly-movable apparatus using the rolling element
A rolling-element hold spacer 9 includes a spherical indent 11 which is formed in either side of a rolling element 7 so as to match the curved surface of the rolling element 7; thick hold sections...
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6240797 |
Linear actuator with anti-reverse-rotation mechanism
A linear actuator includes two axially opposed bearings with built-in one-way clutch assembled in a housing member with respective outer races secured to the housing member such that respective...
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6240798 |
Reinforced anti-backlash nut with graduated thread depth fingers
An anti-backlash nut has flexure members which are continuously biased inwardly against a lead screw by a force-applying sleeve which acts on ramps on the flexure member. The spline means include...
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6237434 |
Ball screw and nut assembly with a nut having a preloaded wiper thread and method of its manufacture and operation
A ball screw and nut linear actuator has a screw and nut with helical grooves and threads providing a helical raceway between them. The raceway has a ball return portion and provides a track for a...
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6220110 |
Oil storing ball recirculation block of leadscrew
Disclosed herein is a leadscrew ball recirculation block with oil storing means wherein an cavity in the ball recirculation block which being not effectively used for circulating balls is utilized...
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6202498 |
Screw with recirculating ball arrangement
An axial displacement arrangement in the form of a ball screw and nut achieves a highly compact configuration by effecting ball recirculation entirely within the ball screw shaft. The ball...
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6186020 |
Device for conversion of rotary into axial movement
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6182506 |
Arrangement for performing a contact pattern test of bevel gears
An arrangement performs a contact pattern test of bevel gears when they are produced. The arrangement includes a testing unit in connection with a machining apparatus, to which testing unit a...
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6178839 |
Ball screw with lubricating grease and seal member of solid lubricating composition
A plurality of balls 3 are disposed for rolling and circulation in a spiral calculation passage defined between a spiral screw groove surface 1a formed on the outer periphery of a screw shaft 1 and...
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6176149 |
Ball screw having spacers
Spacers 26 each of which has a concave surface 27 complementary to the spherical surface of a ball 25 at each end thereof are disposed at areas between the adjacent balls 25, 25. A ball circulation...
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6170351 |
Device for converting a rotational movement into an axial movement
A device for converting a rotary motion into an axial motion has a threaded spindle (1), a nut concentrically surrounding the threaded spindle with a clearance and a plurality of axially parallel...
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6167769 |
Screw mechanism
A screw mechanism having a shaft which is guided in such a way that its reciprocating movement is converted at the output of the screw mechanism into a rotary movement. The shaft has a...
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6164407 |
Electric power steering apparatus
A vehicle steering apparatus (10) for turning steerable wheels (44) of a vehicle comprises a manually rotatable input member (12) to which steering torque is applied, an output member (34)...
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6158557 |
Roller spindle assembly and brake actuator incorporating the same
The invention relates to a roller spindle assembly (2) having a spindle rod (4) and a spindle nut (6) and roller bearings (10). The roller bearings are journalled between the spindle nut (6) and...
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6155717 |
Linear movement device and lubricant supplying device used therefor
The present invention relates to a linear movement device, for example, a linear guide device, a ball screw, a ball spline or the like in which a track shaft and a slide member is engaged movably...
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6135229 |
Driving force transmitting apparatus for four-wheel drive vehicle
A transfer 44 is connected, through a main transmission 42, to an engine 40 disposed in a front side of a vehicle, and a propeller shaft 52 is connected between the transfer 44 and a rear...
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6131479 |
Device for converting rotary motion into axial motion
A device for converting rotary motion into axial motion, having planetary rollers which are driven from a stationary drive housing by a drive shaft. These planetary rollers are held...
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6116107 |
Lead screw piezo nut positioning device and piezo nut positioner assembly thereof
A lead screw piezo nut positioning device includes coupling and driven members and a piezo nut positioner assembly. The coupling member is secured to an external machine part and received about a...
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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...
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6112610 |
Externally insertable self-retaining crossover for ball nut and screw assemblies
A ball nut and screw system provides a helical raceway for load bearing balls disposed to occupy portions of the turns of the helical groove in the nut. The nut has a passage extending generally...
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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....
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6101891 |
Device for converting a rotational movement into an axial movement
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6102576 |
Bearing assembly
A lubrication film 5 is formed of a solid lubricant including PTFE (polytetrafluoroethylene) having a mean molecular weight of not more than 25,000 and a mean particle size of not less than 5 μm...
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6098479 |
Linear actuator and preferred application
The invention concerns a linear actuator for the conversion of a rapid rotational movement with low moment into a slow linear movement with high force. The concept of a special roller drive of...
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6098480 |
Worm gear assembly for drive axle
A drive axle assembly for a vehicle receives input torque from an engine via an input shaft. The input shaft drives a worm which in turn drives a worm gear. The worm gear includes teeth which...
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6095009 |
Ball screw having spacers
In order to provide a ball screw, ball, which allows to reduce the ball's noise and prevent wearing and clogging of ball s without decreasing its loading capacity, without using a ball chain or...
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6092434 |
Ball screw device of ball-circulating-part embedded type
A ball screw device of a ball-circulating-part embedded type includes: a screw shaft having a helical thread groove on an outer peripheral surface thereof; a ball nut having a thread groove...
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6093989 |
Advanced magnetically-stabilized couplings and bearings, for use in mechanical drives
A rotary-arm drive includes a wobble-absorbing magnetic bearing (WAMB). One end of the arm engages a load-carrying surface. The other end rotates with a power-carrying rotary shaft. The arm...
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6092337 |
Vehicle liftgate power operating system
A power operating system for opening and closing a vehicle liftgate has a pair of drive units supported on the vehicle roof and connected to the liftgate for opening and closing the liftgate. Each...
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6093127 |
High lateral offset front differential
A differential assembly for a vehicle having a housing and a differential mechanism rotatably mounted in the housing. The differential mechanism includes a support shaft transversely disposed...
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6089117 |
Ball screw device
A ball screw unit comprising a screw having a helical ball rolling groove on the outer peripheral surface thereof, a nut assembly having a load zone formed of a helical load rolling groove opposing...
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6089116 |
Gearing stage
In a gearing stage, a driving first wheel has a ferromagnetic profiled rib which is circumferential in one thread, whereas a second driven wheel has permanently magnetic profiled ribs which are...
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6082210 |
Ball connecting body and ball screw apparatus using the same
A ball connecting body in which a multiplicity of balls are arranged in a line at a predetermined interval and in a freely rotating manner. The ball connecting body is installed and used in a ball...
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6074170 |
Pressure regulated electric pump
A pressure regulated electric pump is characterized by a positive displacement double acting reciprocating pump driven by an electric motor through a planetary roller screw. A controller senses the...
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6070479 |
Rolling element string and linear guide device and rolling element screw device using the same
The invention provides a rolling element string which can be bent or twisted freely in any direction in use while holding rolling elements such as balls or rollers surely and which can be used in...
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6053065 |
Spindle drive
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