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Sankyo Seiki Mfg. Co., Ltd. Patents
Assignee:
Sankyo Seiki Mfg. Co., Ltd.
Address:
Nagano, JP
No. of patents:
254
Patents:


1 2 3 4 5 6


Patent Number Title Of Patent Date Issued
D368069 Combined electric motor and bracket March 19, 1996
D364375 Small electric motor November 21, 1995
D359476 Circuit board with mounting flange June 20, 1995
7095148 Motor with improved rotary shaft supporting structure August 22, 2006
A stepping motor includes a rotor with a permanent magnet, a rotary shaft extending from the rotor and a stator placed around the rotor. The stepping motor comprises a stator core placed on one end section in a motor axial line direction of the stator, a bearing plate that includes a
7052386 Curved surface cutting processing method May 30, 2006
A curved surface cutting method in which a surface of a material is cut by a bite to form a specified curved surface, a cutting edge of the bite is provided with a flat section and corner sections at both ends of the flat section; the posture of the cutting edge of the bite is adjusted s
7035507 Manufacturing method for optical element April 25, 2006
A manufacturing method for an optical element includes providing a base member for an optical element and a cutting tool from which a blade tip part protrudes, forming an inspecting groove on a surface of the base member by the blade tip part of the cutting tool by relatively moving the
7027377 Optical head device and objective lens April 11, 2006
An optical head device that converges first and second laser beams having different wavelengths on recording surfaces of first and second optical recording media through a single light converging optical system including an objective lens for recording or reproducing data on the reco
7005758 Hydraulic power generating device February 28, 2006
A hydraulic power generating device includes a main body case forming a flow passage provided with a water wheel chamber between a fluid inlet port and a fluid outlet port, a cover covering the main body case, a water wheel for power generation disposed in the water wheel chamber, a
7000836 Method of self-testing IC card readers February 21, 2006
A method of self-testing an IC card reader. The IC card reader communicates data with an IC card. The IC card reader sends the result of the communication to a higher level apparatus. Before the higher level apparatus issues an IC card execution command, the IC card is activated so a
6991163 Card reader January 31, 2006
A card reader that transports a card having a magnetic strip with a drive means to read and write information on the card that includes prehead for detecting the insertion of the card by searching the presence of the magnetic information recorded on the magnetic strip, and a card detecti
6990992 Damper device January 31, 2006
A damper device includes a first baffle capable of opening or closing a first opening portion by turning about its axis and a second baffle capable of opening or closing a second opening portion by turning about its axis. A common drive source for driving the first baffle and the sec
6984975 Magnetic displacement sensor for sensing the position of an object January 10, 2006
A displacement sensor for sensing the relative position of an object to be detcted is provided. The displacement sensor includes a core body having a core center portion and core end portions that are continuously formed on both sides of the core center portion. Magnetizing coils and det
6981688 Flow control device January 3, 2006
A flow control device includes an opening part through which an upstream side of a fluid flow passage is in communication with a downstream side of the fluid flow passage. A valve element closes the opening part and includes a large flow rate controlling valve element capable of adjustin
6967586 Bearing test method, bearing test device, bearing monitoring device and storage device November 22, 2005
A bearing test method and a bearing test device are provided for bearings in which a non-contact state is maintained between a shaft element and a bearing element in a normal rotation state. In addition, a motor bearing monitoring device is provided to detect an abnormality in a motor or
6967421 Core for motor, motor furnished to the core and method for manufacturing the motor November 22, 2005
A motor includes a core having a common connection section formed in a ring shape, a plurality of salient pole sections that protrude and extend radially from the common connection section, each of the salient pole sections defining a common connection section side adjacent to the common
6962443 Fluid dynamic pressure bearing apparatus November 8, 2005
A fluid dynamic pressure bearing apparatus includes a radial dynamic pressure bearing formed in a gap portion between a bearing member and a shaft member. The apparatus also includes a thrust dynamic pressure bearing having a first thrust bearing portion formed between a top surface
6962320 Flow control device November 8, 2005
A flow control device includes a wall part partitioning an upstream side and a downstream side of a flow passage for fluid, an aperture part formed on the wall part, a sheet shaped valve element which changes from a closed state in which the sheet shaped valve element extends along the w
6961297 Optical head device November 1, 2005
The present invention provides for a optical head device having a beam-guiding optical device to bring beams of different wavelengths which are emitted by separate light sources together onto the same optical axis or to guide the beams onto a common photo receiving device. The beam-g
6956306 Linear actuator, and pump device and compressor device using the same October 18, 2005
A linear actuator includes an inner yoke, an outer yoke and a coil for generating a magnetic field between the outer yoke and the inner yoke. The outer yoke includes a first facing portion facing the inner yoke and a second facing portion which faces the inner yoke. An insulating coil
6955469 Dynamic pressure bearing device October 18, 2005
A dynamic pressure bearing device includes a dynamic pressure bearing member, a rotary member that is rotatable with respect to the dynamic pressure bearing member, a thrust dynamic pressure bearing section provided in a thrust opposing region that is between an end surface in an axi
6951473 IC card reader October 4, 2005
An IC card reader comprising a contact head holding body which is given a force in the card discharge direction and makes contact with an IC card at the insertion of the card. The card reader also comprises a card latch lever that is operated between an open mode, in which an IC card can
6951424 Motor with axially moveable bearing member October 4, 2005
A motor includes a rotor section with a rotor shaft having an end section, and a stator section including a yoke section disposed opposite the rotor section. The motor is also equipped with a bearing assembly having a bearing member that includes a main bearing section with a recess sect
6941413 Nonvolatile memory, its data updating method, and card reader equipped with such nonvolatile mem September 6, 2005
A method for updating data in a nonvolatile memory is provided. The method comprises the steps of writing in a RAM data stored in a data writing region of the non-volatile memory, updating the data in the RAM, updating a data error detection region in the RAM based on the data updated,
6939047 Dynamic pressure bearing device September 6, 2005
A dynamic pressure bearing device includes a rotary shaft, a dynamic pressure bearing member for supporting the rotary shaft, two radial dynamic pressure bearing parts and a thrust dynamic pressure bearing part formed between the dynamic pressure bearing member and the rotary shaft,
6936940 Motor with resin base plate August 30, 2005
A motor includes a stator and a rotor having drive permanent magnets and a rotary shaft. The stator supports a core with coils wound thereon and includes a base plate. The base plate is formed with a resin, and is composed of a core supporting section that supports the core, a shaft
6935611 Motor control device for flow control device August 30, 2005
A motor control device for a flow control device includes an opening part through which an upstream side of a fluid flow passage is in communication with a downstream side of the fluid flow passage, a valve element that controls a flow of a fluid which passes through the opening part, a
6933631 Stepping motor August 23, 2005
A stepping motor includes a pair of drive coils arranged to sandwich a magnetic rotor in the axial direction of a rotor shaft in order to decrease the motor size. The drive coils are configured to be annular around the rotor shaft that extends in both directions from the magnetic rot
6926250 Valve driving device August 9, 2005
A valve driving device includes a plurality of valve bodies that are simultaneously driven. Driven gears are disposed symmetrically with respect to an axis of the a common gear. Rubber valve bodies which are separate from the driven gears are disposed on the lower surfaces of the dri
6921995 Motor July 26, 2005
A motor comprises a casing made of magnetic material for housing a rotor and a coil wherein side surfaces of the casing have openings. The openings are closed by the magnetic plates that are thinner than the thickness of the material of the casing.
6918408 Valve driving device July 19, 2005
A valve driving device comprises a main case having one or more inlet pipes through which a fluid flows in from an external compressor and two or more outlet pipes through which the fluid flows out and also having built-in valve elements to open and close openings that are portions of a
6896143 Electrolytic machining method, method for manufacturing dynamic pressure bearing devices, and dy May 24, 2005
An electrolytic machining method for electrolytically machining a workpiece is provided. The method uses a masking member having through-hole patterns that correspond to the shapes of concave parts to be formed in the workpiece. The masking member is brought in contact with a machining
6891307 Motor with a plurality of pole teeth May 10, 2005
A motor includes a plurality of core assemblies forming three phases, and a plurality of coil windings provided on the respective core assemblies, wherein one of the coil windings is wound in a coil winding direction opposite to a coil winding direction of the coil windings on other of t
6885121 Controlled radial magnetic bearing April 26, 2005
The flux densities formed by plural electromagnet poles M1 to M12 which are arranged at a predetermined interval in a circumferential direction of a rotary body 1 at the same position in an axial direction of the rotary body 1 are gradually changed in the circumferential direction of the
6880802 Valve device April 19, 2005
A valve device having a novel vale seat plate is provided. The valve seat plate has an inlet opening, an outlet opening, a front side and a back side. A sealing case covers the front side and inlet and outlet pipes are attached to the back side to communicate respectively with the inlet
6879077 Motor, motor stator and method for manufacturing the same April 12, 2005
A motor has a stator core having a plurality of salient poles and stator coils wound on the salient poles, respectively, each of the stator coils having a common side coil end part and a coil winding part. The common side coil end part of each of the stator coils extends radially outward
6877716 Motor-operated damper device April 12, 2005
A motor-operated damper device includes a baffle driving device equipped with a motor, a baffle that is driven by the baffle driving device, a frame defining an opening section that is closed and opened by the baffle, the opening section having a peripheral edge section, and a buffer mem
6873591 Two-wavelength optical pickup device with step-like diffraction element March 29, 2005
An optical pickup device is equipped with a first light source that emits first light, a second light source that emits second light having a wavelength different from a wavelength of the first light, and a diffraction element that deflects the first light or the second light to matc
6873068 Stepping motor March 29, 2005
A stepping motor includes a stator whose outer diameter is 8 mm or less and a rotor having a magnet disposed opposing to the stator. The stator has a core with pole teeth formed therein. The ratio between the thickness of the pole teeth formed in the core in the radial direction on the s
6865900 Temperature control method for refrigerator March 15, 2005
A temperature control method for a refrigerator includes providing a valve device, in which an inflow port where a refrigerant flows into, at least two outflow ports having a first outflow port and a second outflow port where the refrigerant flows out, and a valve element for performing
6861776 Stator structure of motor March 1, 2005
A stator structure of a motor includes a stator assembly having a coil bobbin on which coil windings are wound, terminal pins affixed to the coil bobbin, a substrate having a wiring pattern and affixed to the terminal pins, and a connector member that is equipped with connector pins for
6859319 Optical element, mold for molding optical element and optical pickup device February 22, 2005
An optical element including a binary blaze grating formed thereon, wherein the binary blaze grating is formed so as to have step differences formed by a number of levels produced by mechanical processing. The number of levels is equal to or more than 5 and the height of the step differe
6856469 Lens driving device February 15, 2005
A lens driving device includes a moving body equipped with a lens and a driving magnet attached to the lens, and a fixed body that is equipped with a driving coil that forms together with the driving magnet a magnetic circuit and moves the moving body in an optical axis direction of the
6853808 Camera and portable equipment with camera February 8, 2005
A camera includes a lens driving device and an image obtaining device. The lens driving device is formed from a lens holder that holds a lens and a driving device that moves the lens holder in an optical axis of the lens, wherein the lens holder is intermittently stoppable at least at tw
6853608 Optical pickup apparatus and method of manufacturing the same February 8, 2005
An optical pickup apparatus has an objective lens that converges a laser beam on an optical recording medium and a lens holder that retains objective lens. The optical pickup apparatus also has a base member, four linear members having base ends supported by the base member and distal
6853100 Linear actuator and a pump apparatus and compressor apparatus using same February 8, 2005
A linear actuator includes a first yoke part, a second yoke part opposing the first yoke part from a direction perpendicular to the axial direction thereof, an intermediate yoke part forming a first gap and a second gap, a coil disposed within a space delineated by the intermediate yoke
6851015 Method of overwriting data in nonvolatile memory and a control apparatus used for the method February 1, 2005
In a nonvolatile memory such as flash memory where data is stored sector by sector, a method of overwriting a data sector is provided. The old data to be overwritten in a data sector along with its error detection code are initially saved to a backup region which is also in a non-volatil
6844995 Head protection device and a card reader having the head protection device January 18, 2005
A head protection device in a data recording circuit is disclosed in which write-current of a given level that corresponds to a high or low level of coercive force of the magnetic recording portion of a recording medium is provided as an output and supplied to a magnetic head for data re
6840355 Rotary damper device January 11, 2005
A rotary damper device includes a case in which a viscous fluid is filled and sealed, a rotation shaft relatively rotatably supported by the case, a rotation vane formed protruded from the rotation shaft, and a check valve mounted on a tip part of the rotation vane. A passage where the v
6837622 Dynamic pressure bearing apparatus January 4, 2005
A dynamic pressure bearing apparatus provides a configuration in which the label on which desired data is visibly printed is arranged in a manner that the label does not overlap with a cover plate at least in the area where the label faces the rotary shaft in the shaft direction where th
6836050 Terminal structures for motor with brush to connect motor to external circuit December 28, 2004
A motor with brush includes a rotor having a rotary shaft and a commutator retained at the rotary shaft, two brush sections each having a plane surface in an axial direction of the rotor and in sliding contact with the commutator, and two brush terminals that are integral with the brush
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