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Nippon Seiko Kabushiki Kaisha Patents
Assignee:
Nippon Seiko Kabushiki Kaisha
Address:
Tokyo, JP
No. of patents:
338
Patents:


1 2 3 4 5 6 7


Patent Number Title Of Patent Date Issued
RE34359 Electric steering apparatus August 31, 1993
An electric steering apparatus which effects position adjustment by electric drive has a screw shaft parallel to upper and lower columns. A nut member rotatably supported by a housing fixed to a bracket is fixed against movement in the axial direction of the screw shaft and threadably
RE33962 Bearing device assembly June 16, 1992
A bearing device assembly includes a water pump shaft supported by a rolling bearing, and a .[.plulley.]. .Iadd.pulley .Iaddend.seat press fitted to one end of the water pump shaft. A recess or recesses in the form of a ring-shaped groove, a spiral-shaped groove, and a groove extendi
RE33884 Under seal assembling structure in linear guide apparatus April 14, 1992
Each of the pair of under seals which are respectively attached to the lower surfaces of the side walls of a slider includes an elongate core metallic plate and a rubber member secured to the core metallic plate and having a lip portion protruding inwardly from the inner edge of the core
RE33304 Automatic seat belt system August 21, 1990
An automatic seat belt system includes a guide rail arranged along a predetermined path within the room of an automobile, a runner provided movably on the guide rail, and a drive member for causing the runner to move in such a way that a webbing fastened to the runner is displaceable
RE32573 Process for producing a ferrofluid, and a composition thereof January 5, 1988
The invention relates to a process for producing a ferrofluid, and a composition thereof. More particularly, fine particles of the ferromagnetic materials such as magnetite, ferrite, iron, cobalt alloy, etc. are dispersed stably and uniformly in one dispersing medium selected out of
D340041 Actuator controller October 5, 1993
D333666 Positioning actuator March 2, 1993
5590225 Plastic holder for bearing December 31, 1996
A plastic holder for a rolling bearing is made of linear-chain polyphenylene sulfide resin, preferably with glass fiber reinforcement.
5332460 Method of manufacturing a seal ring for magnetic fluid seal device July 26, 1994
A seal ring for magnetic fluid seal device, comprising an annular magnet covered with heat activated resin and an annular pole piece stacked and pressed and bonded coaxially with said annular magnet at a temperature higher than heat activated temperature.
5298323 Bearing steel and rolling bearing made thereof March 29, 1994
A long-life bearing steel and a long-life rolling bearing made of the steel are disclosed. In the steel, the number of oxide or oxide-based inclusion particles in a given unit area A of 160 mm.sup.3 with an average particle size of 3 to 30 .mu.m is 80 or less and an abundance of oxide or
5263366 Speed sensing hub unit November 23, 1993
A speed sensing hub unit comprising an axial shaft extending from a constant velocity joint having a male spline, a cylindrical hub having a first flange on an outer peripheral face thereof for supporting a wheel and a female spline on an inner peripheral face thereof which engages with
5259886 Rolling member November 9, 1993
A rolling member used as an outer race, inner race, a ball or roller of a bearing contains a metal flow in the structure formed by plastic working (fold forging). The angle of metal flow determined by a tangent line of the metal flow and the axis of rotation of the rolling member is
5252391 Surface treated sliding or rolling contact element and rolling bearing October 12, 1993
A surface treated sliding or rolling contact element, including a reaction product film of a 0.05 .mu.m to 0.5 .mu.m thickness which has been produced by a chemical treatment of the surface of the sliding or rolling contact element wherein the reaction product film is an inorganic and/or
5251154 Method for measuring accuracy of thread groove and system for the same October 5, 1993
In measuring the accuracy of a thread groove of a ball thread formed in a nut by using an electric micrometer, a displacement of one point on each of a pair of flanks of the thread groove is measured along a longitudinal direction of the thread groove, and a pair of measured data sequenc
5228720 Coupler of collapsible shaft for steering device July 20, 1993
A coupler of a collapsible shaft for a steering device comprises a shaft member having a male serration formed at an end of an outer periphery thereof; a tube member having a female serration for engaging with the male serration groove formed at at least an end of an inner periphery
5222913 Resilient connector for steering shaft June 29, 1993
A resilient connector for a steering shaft connecting a wheel steering system and a steering handle, comprises a flange member connected to a first shaft member extending from the wheel steering system, particularly in such a manner that it can be shifted axially but not rotated with
5218744 Magnet-inclusive component suitable for use in occupant-protecting means for motor vehicle June 15, 1993
A magnet-inclusive component is furnished for use in an occupant protecting system, such as a seat belt system, for a motor vehicle. The component includes a magnet and at least one member located adjacent the magnet. The magnet is molded or cast in situ in the adjacent member, preferabl
5209135 Impact absorbing type steering column device May 11, 1993
In an impact absorbing type steering column device, edges of a flat plate portion provided at an end portion of an energy absorbing member are bent to form bent-over sides which are attached to the outer surface of a steering column to provide a space where the energy absorbing member ca
5204711 Projection exposure device April 20, 1993
In a projection exposure device in which an exposure light from a light source device is transmitted through a mask having a predetermined pattern formed therein and then an image of a mask pattern is focused by a projection lens on an exposure member held by a holding mechanism, an
5203216 Supporting apparatus for supporting pinion shaft in rack-pinion power transmitting system April 20, 1993
A rack-pinion steering mechanism for a vehicle, comprises a housing, a pinion shaft having housed within the housing a pinion and first and second supporting portions respectively disposed to opposite sides of the pinion, and a rack shaft having a rack meshed with the pinion within the
5189353 Resolver system February 23, 1993
A resolver system includes a resolver having an annular rotor, and an annular stator arranged around the annular rotor in spaced relationship thereto. The rotor and the stator are arranged such that the reluctance of a space defined between the rotor and the stator varies with a change i
5188474 Yoke for universal joint February 23, 1993
A universal joint yoke comprises: (a) a generally cylindrical connecting part made by press-forming a metal plate and having internal peripheral serrations, a first end portion at which edges of the metal plate are brought into abutment to form a tubular abutting part, a second end p
5184402 Method of installing roller bearing February 9, 1993
A method of installing a roller bearing using a spacer made of an elastic material and supported in a space defined a plurality of rollers of the roller bearing, which spacer has at least a leading section having a tapered surface progressively reduced in diameter to the leading end of
5183341 Speed sensing bearing unit February 2, 1993
In a speed sensing bearing unit comprising a fixed ring with a pair of outer ring raceways on its inner peripheral surface, a pair of inner rings with inner ring raceways on their outer peripheral surfaces corresponding to the outer ring raceways, a plurality of rolling bodies provided b
5170590 Method of superfinishing a gothic-arch groove December 15, 1992
In superfinishing a Gothic-arch-shaped groove of a nut by using a superfinishing stone attached to the tip end of an oscillation arm while oscillating the superfinishing stone about the oscillation axis and, at the same time, moving the superfinishing stone in the longitudinal direct
5161902 Magnetic sealing device for use between first and second magnetic members which rotate relative November 10, 1992
Installed between a housing and a shaft concentrically disposed with a space having a predetermined radial length therebetween so as to move relative to one another is a sealing device which comprises a ferrofluid seal device comprising a permanent magnet and a pair of pole pieces for
5160166 Limit switch unit and passive seat belt assembly equipped with the same November 3, 1992
A limit switch unit suitable for use in a passive seat belt system of the type that a movable anchor with a webbing connected thereto is moved by a drive member such as a drive wire along a rail between an occupant-restraining position and an occupant-releasing position. The limit sw
5149926 Acceleration sensor September 22, 1992
An acceleration sensor has a spherical inertial mass (2) formed of a magnetic material. A magnet (3) has a holding part (3a) for normally holding the inertial mass (2) seated thereat. A switch changeover member (5) is actuatable by the inertial mass (2) when the inertial mass (2) mov
5149204 Dust seal device of a linear guide apparatus September 22, 1992
A dust seal device of a linear guide apparatus includes a pair of side seals respectively attached to end cap which are in turn attached to opposite ends of a slider main body. Each side seal has an inverted U-shaped and consists of a mandrel formed of a steel plate coated with a syn
5148104 Hub unit with pulse rotor and cover mounted sensor for sensing rotational speed September 15, 1992
A pulse rotor is externally supported and secured on a cylindrical face section formed on a hub. The amount by which this pulse rotor projects from an outer ring member is regulated when the pulse rotor is fitted onto the cylindrical face section for supporting. A sensor is provided on t
5147009 Steering force control apparatus of power steering system September 15, 1992
A steering reaction force generating mechanism for generating a reaction force acting on an input shaft is provided within a cylindrical space of a housing between a lower end portion of the input shaft and an upper end portion of a pinion shaft (output shaft). The steering reaction forc
5145267 Automatic center adjusting roller bearing September 8, 1992
In a double row automatic center adjusting roller bearing at least one of the raceway surfaces of an inner race and an outer race and a rolling surface of a roller is worked to have different surface roughnesses along the axial direction of the roller bearing. For the inner race having a
5143637 Magnetic fluid composition September 1, 1992
A heat-resistant, water-resistant, low-viscosity magnetic fluid and a process for producing same has a dispersion medium made of a low-volatile organic solvent, a low molecular weight dispersant having a lipophilic group and a polar group, the lipophilic group having an affinity for the
5143402 Tilt type steering device September 1, 1992
The tilt position of a steering device can be freely adjusted by changing the engagement position of facing sets of gear teeth. A pair of supporting plates each provided with a circular arc-shaped long hole is attached to the lower part of a steering column, and a shaft is received and f
5139347 Oil leakage preventing structure of a linear guide apparatus August 18, 1992
End caps made from synthetic resin are respectively joined to opposite ends of a slider main body of a linear guide apparatus. Each end cap having a substantially inverted U-shape has a joining end surface formed with curved passages to bring ball rolling grooves of the slider main body
5137375 Rolling bearing August 11, 1992
A rolling bearing having bearing rings and rolling members wherein at least one of the bearing rings and the rolling members essentially consists of an alloy steel which contains carbide-forming elements. The bearing rings and the rolling members are subjected to carburizing or carbo-nit
5137371 Linear guide table system August 11, 1992
A linear guide table system includes a pair of linear guide apparatuses connected in parallel to each other by a common table fixed to upper surfaces of sliders of the pair of linear guide apparatuses. Each slider of the pair of linear guide apparatus has an inverted L1-shaped cross
5135672 Electroconductive magnetic fluid composition and process for producing the same August 4, 1992
An electroconductive magnetic fluid composition is disclosed comprising a low volatility organic solvent as a carrier, a surface active agent having an lipophilic group with a strong affinity for the solvent, fine ferromagnetic particles coated at the surface thereof with the surface
5133608 Linear movement rolling guide apparatus and method of manufacturing bearing roller July 28, 1992
A roller for a bearing used in a linear movement rolling guide apparatus is tumbled after superfinishing the outer peripheral surface so that the surface roughness of the roller in a circumferential direction is in a range from 0.05 to 0.10 micrometers in average roughness on the center
5132856 Motor spindle for hard disc device July 21, 1992
A motor spindle for a hard disk device having a pair of ball bearings each having an inner ring, an outer ring, a plurality of balls, a retainer for slidably holding the balls and having a first seal plate provided with outer and inner edges placed adjacent to the inner peripheral surfac
5129739 Bearing with dynamic pressure grooves and method for manufacturing the same July 14, 1992
A bearing with dynamic pressure grooves includes an outer cylinder made of a metal and a resin sheet bonded to the inner peripheral surface of the outer cylinder. The resin sheet is made of a thermoplastic resin, for example, a polytetra fluoroethylene, as a main component mixed with a
5125256 Method of manufacturing outside ring June 30, 1992
An outside ring manufacturing method comprises a first step of blanking out from a metal sheet a blank with a circular body portion and tongue portions which protrude at several places from the outer peripheral edge of this body portion, a second step of press forming the blank so that t
5124060 Magnetic fluid composition June 23, 1992
A magnetic fluid composition comprising a less volatile organic solvent as a dispersing medium, a dispersing agent having oleophilic groups exhibiting an affinity therewith, fine ferromagnetic particles coated at the surface thereof with the dispersing agent and dispersed in the less
5122780 Fault detection device for occupant protective systems June 16, 1992
A fault detection device for an occupant protective system for use in an automotive vehicle, which has a plurality of squibs connected in parallel with each other. A common signal is generated for actuating the squibs to operate the system when the vehicle undergoes deceleration in exces
5122000 Rolling bearing June 16, 1992
A rolling bearing in which a bearing ring and/or a rolling element comprises an alloy steel wherein the hardness of a surface layer over a thickness corresponding to greater than 2% of a mean diameter of a rolling element is equal to or greater than 60 HRC and the hardness at least of
5114245 Dynamic pressure bearing device May 19, 1992
A dynamic pressure bearing device includes a sleeve and a shaft member which is rotatably fitted into the sleeve. The sleeve is made of an aluminum alloy containing a carbon fiber and has a radial bearing surface formed in an inner peripheral surface and a thrust bearing surface formed
5112139 Roller type linear movement guide bearing May 12, 1992
A linear movement guide bearing including a main body accommodating a pair of side by side roller trains is linearly movable in an axial direction along a raceway surface through rolling of the roller trains. A pair of side protection covers formed of metal plates are attached to the mai
5109720 Feed unit apparatus May 5, 1992
A nut block, which is driven by a feed screw shaft and which is movable axially within a guide rail having a U-shaped cross section, is provided with extending portions extending laterally from both upper side portions thereof. The extending portions are positioned near the upper surface
5108491 Rolling bearing composition April 28, 1992
A rolling bearing comprise a bearing ring having inner and outer rings, and rolling elements. At least one of the inner and outer rings and the rolling elements is formed of a sintered alloy steel and has pores and carbides present therein. The largest one of the pores has a diameter
5104238 Impact resistive linear guide apparatus April 14, 1992
A linear guide apparatus includes an axially extending guide rail having ball rolling grooves formed in both side surfaces, and a slider movably straddling the guide rail and having ball rolling grooves formed in inner surfaces of both side walls. At least one of a clearance between an u
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