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| Number | Title | Issue Date |
| 7303045 | Motor vehicle steering device A compact and highly reliable motor vehicle steering device that does not require a spiral flat cable. The motor vehicle steering device includes variable gear ratio system that modifies the transmission ratio of the rotary motions between first steering shaft and s... | 12/04/2007 |
| 7281604 | Electric power steering apparatus An electric power steering apparatus for converting rotation of a steering assist motor into movement of a steering shaft in the axial direction thereof in accordance with steering operation using a ball screw mechanism wherein a female thread groove formed around a... | 10/16/2007 |
| 7240762 | Electric power steering apparatus A gearing radius of a worm wheel is set corresponding to a neighborhood region of a steering neutral position, in such a way as to be relatively large. Thus, backlash is made to be relatively small. This prevents noises from being produced when an automobile travels... | 07/10/2007 |
| 6991062 | Ball screw and wheel steering device having the same A ball screw mechanism comprises a screw shaft, a nut and balls. The nut has a cylindrical portion in the axial middle on the outer peripheral surface thereof that becomes a fitting surface for fitting in a sleeve, and small diameter step portions in the opposite ax... | 01/31/2006 |
| 6965820 | Robust steering-pull torque compensation A controller (32) for a vehicular system (10) that includes a hand-wheel (16) and an electric motor (34) includes a torque-assist function (56) responsive to a signal representing the torque applied to the hand-wheel (16) fo... | 11/15/2005 |
| 6945353 | Variable ratio steering gear A rack (1) and pinion (4) steering gear for a vehicle in which the steering angle ratio varies as a function of at least both the steering wheel angle input by the driver and vehicle speed. The steering gear comprising a rack (1) laterally displ... | 09/20/2005 |
| 6938724 | Motor vehicle steering device The invention provides a compact and highly reliable motor vehicle steering device that does not require a spiral flat cable. The motor vehicle steering device includes variable gear ratio system that modifies the transmission ratio of the rotary motions between fir... | 09/06/2005 |
| 6928894 | Compensated actuator with optimized power An actuator combining mechanical and hydraulic forces includes a cylindrical body and a piston that can slide relative to the cylindrical body. The piston and the cylindrical body are connected by a mechanical system for transmitting mechanical power that constitute... | 08/16/2005 |
| 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 system further comprises a ballnut (66) that is coaxial with the r... | 04/30/2002 |
| 6374693 | Variable steering ratio steering system A variable-ratio steering system includes a steering shaft connected to a manually-operated handle, a ball nut engaging with the steering shaft and a ball-bearing-screw mechanism converting rotary motion of the steering shaft into axial displacement of th... | 04/23/2002 |
| 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 1c 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 large leads can be manufactured. The surface of the ball rollin... | 01/01/2002 |
| 6272947 | Steering shaft centering assembly A steering shaft centering assembly for resisting off-center movement of the steerable wheels of a vehicle and for returning them to a selected center position after each such movement. The centering assembly includes a screw member connected between an i... | 08/14/2001 |
| 6244125 | Movement transforming device and power steering apparatus Two of the three feed rings to beheld in a rotating cylinder are fitted into respective mounting holes, which are formed on both end of the rotating cylinder so as to have circular openings, and are fixed by locking rings so as not to slip off. The center... | 06/12/2001 |
| 6227064 | Power steering apparatus A power steering apparatus is furnished with a rotary cylinder supported by restraining the movement in the axial direction and rotating coaxially with a steering shaft by the transmission of movement from the motor, a feed ring fixed in the rotary cylind... | 05/08/2001 |
| 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) rotatable to effect turning of the steerable wheels (44) of the ve... | 12/26/2000 |
| 6155376 | Electric power steering assembly A steering assembly (10) for turning steerable wheels of a vehicle in response to rotation of a vehicle steering wheel (11) comprises a housing (30) and a member (32) which is movable axially within the housing to effect turning movement of the steerable ... | 12/05/2000 |
| 5941129 | Clamp for motor vehicle steering column A clamp for capturing an adjusted position of a motor vehicle steering column including a stationary bracket having planar sides on opposite sides of the steering column, vertical slots in the planar sides of the stationary bracket, and a rotatably immobi... | 08/24/1999 |
| 5855142 | Retainer for ball screw crossover tube A retainer for a crossover tube of a ball screw between a rack piston and a worm shaft of a motor vehicle power steering gear. The ball screw includes a helical passage between the rack piston and the worm shaft, a U-shaped crossover tube on the rack pist... | 01/05/1999 |
| 5809831 | Electric actuator An electric actuator includes a hollow actuator housing, an electric motor connected to the hollow actuator housing, a feed screw shaft coupled to the drive shaft of the electric motor, for transmitting rotational drive power from the electric motor, and ... | 09/22/1998 |
| 5738181 | Press fit arrangement of a nut member in an enlarged end portion of a hollow shaft In a press fit arrangement of a tubular nut member in an enlarged end portion of a hollow shaft, typically used in an electric power steering device, a region of loose fit is provided in a part of an interface between the tubular nut member and the enlarg... | 04/14/1998 |
| 5713242 | Actuating mechanism for fluid displacement and pressurizing device Actuating mechanism for rapidly and selectively moving a threaded screw and nut member combination into or out of threaded engagement, particularly for use of the screw as a control fluid plunger to pressurize angioplasty balloon catheters, or the like, w... | 02/03/1998 |
| 5341701 | Steering gear for motor vehicle An integral steering gear for a motor vehicle includes a plunger supported on a pitman shaft of the steering gear for linear bodily movement in a plane perpendicular to the centerline of the pitman shaft and a leaf spring between the plunger and the pitma... | 08/30/1994 |
| 5238257 | Rear wheel steering device A rear wheel steering device comprising an input shaft which rotates about an axis oriented from front to rear in response to a steering angle of front wheels, a screw shaft which is united with the input shaft and has an axis eccentrically arranged with ... | 08/24/1993 |
| 5211069 | Steering device The meshing between a rack which moves according to steering operation and a sector gear meshed with the rack is adjusted by the movement of an output shaft in its own axis direction which is united with the sector gear. A through hole is formed along the... | 05/18/1993 |
| 5174407 | Variable ratio steering system A variable ratio steering system on a motor vehicle can vary the ratio of the angle through which the steerable road wheels are steered to the angle through which the steering wheel is turned by the driver. The variable ratio steering system includes an i... | 12/29/1992 |
| 5138896 | Steering gear, especially for motor vehicles A steering gear, especially for motor vehicles, has a steering worm sector shaft (10) including a toothed quadrant and a steering nut (4) displaceable axially by a steering shaft and engaging with the toothed quadrant with a steering rack section (7). To ... | 08/18/1992 |
| 5020812 | Four-wheel steering system in wheeled vehicle In a four-wheel steering system for a wheeled vehicle, a rear-wheel steering mechanism includes an input shaft drivingly connected at its front end to a front-steering wheel mechanism through a mechanical linkage, a lateral relay rod arranged perpendicula... | 06/04/1991 |
| 4924722 | Recirculating ball mechanism Recirculating ball mechanism comprising a body (10), an actuator shaft (16) rotatably mounted within the body (10) and turnable in response to rotation of an input shaft (12), an output piston (18) slidably mounted in the body (10), a bore (22) within the... | 05/15/1990 |
| 4828063 | Mount for steering gear box A steering gear box mount includes a resilient member interposed between a motor vehicle body and a steering gear box for allowing movement of the steering gear box. The mount also has a structure for limiting allowed movement of the steering gear box. Th... | 05/09/1989 |
| 4823898 | Mount for a steering gear box A steering gear box mount includes a resilient member interposed between a motor vehicle body and a steering gear box for allowing movement of the steering gear box. The mount also has a structure for limiting allowed movement of the steering gear box. Th... | 04/25/1989 |
| 4290344 | Gear assembly A gear assembly: a gear assembly which is used in a power assisted steering system of a vehicle. The gear assembly comprises a piston (1) within a cylinder (2), the piston (1) being axially displaceable in response to an input shaft (4). The piston (1) is... | 09/22/1981 |
| 4270405 | Steering mechanism with time derivation A steering mechanism with time derivation wherein a servo member dependent upon an angular velocity of a steering wheel is connected in the manner of a gear system by means of a summing gear mechanism with a servo member dependent on an angle of the steer... | 06/02/1981 |
| 4261248 | Auxiliary power steering system with relief valve control The maximum operating pressure for the fluid servomotor of a fluid power operated steering system is varied as a function of steering displacement by varying the spring prestress bias on a relief valve controlling fluid discharge from the operating chambe... | 04/14/1981 |
| 4255980 | Variable ratio steering gear The tops of the teeth of a sector gear with respect to a plane of rotation of the sector gear are located on an addendum circle which is a single circular arc having a center which is located on a neutral line and which is spaced from the center of rotati... | 03/17/1981 |
| 4249456 | Servo-steering mechanism A servo-steering mechanism with a steering nut threadably movably connected with a steering worm and being supported with respect to the working piston of a servomotor to be rotatable and also axially movable by way of compression springs in directions of... | 02/10/1981 |
| 4228696 | Steering gear for motor vehicles Means for adjusting automatically for backlash caused by wear between the teeth of a steering nut gear rack on a steering shaft worm and the teeth of a steering mechanism gear sector which engages the rack teeth. The invention utilizes a resiliently biase... | 10/21/1980 |
| 4221137 | Ball nut type steering gear In a ball nut type steering gear for a motor vehicle having two trains of balls confined within passageways formed by the helical grooves in a threaded shaft and a ball nut which surrounds the threaded shaft, two major diameter portions disposed in spaced... | 09/09/1980 |
| 4217793 | Rack and pinion type steering gear This invention pertains to a rack and pinion type steering gear for an automobile comprising a housing; a pinion rotatably supported in said housing to receive turning effect from a steering wheel of the automobile; and a rack meshed with the pinion and s... | 08/19/1980 |
| 4217811 | Lash compensator for power steering gear Power steering gear with integral rotary valve for directing hydraulic pressure fluid to and from a piston nut and in which a sector gear actuated plunger provides a drag load on piston nut screw so that the valve body will be grounded and the valve spool... | 08/19/1980 |
| 4186615 | Steering gears An improved steering apparatus is utilized to turn a steerable wheel of the vehicle. The apparatus includes an axially movable push rod or force transmitting member which is connected with the steerable wheel of a vehicle. A screw thread is formed on the ... | 02/05/1980 |
