Patent application number | Description | Published |
20100094587 | SLEEVE CONE QUALITY MEASUREMENT SYSTEM AND METHOD - A metrology system for measuring a cone angle, a cone straightness, and a cone quality of a sample and method of using the metrology system are disclosed. The system includes a rotary stage, one or more workpiece fixtures that hold the samples in the rotary stage, and a number of different sized measurement devices. The measuring devices are positioned next to the rotary stage and measure the samples using contact. The rotary stage is free to rotate when the measuring devices are in a non-measuring state. The invention also includes a processor that collects data from the measurement devices and calculates the cone angle, the cone straightness, and the cone quality of each sample based on the data. | 04-15-2010 |
20130071053 | Fluid dynamic bearing with non-linear damping - Thus, if a shock or other disturbance to a disc stack spindle bearing assembly occurs that tilts the bearing assembly, the resulting motion is both a tilting, and a motion which is axial. If a shock axially moves the hub assembly, only an axial motion occurs. Thus the system has a non-linear behavior. Pursuant to this invention, when a tilting disturbance occurs, and some of it is dissipated in a net axial movement at a different frequency, energy is subtracted out of the system with motion that is not linearly related to the disturbance was that created it. | 03-21-2013 |
20130193958 | SPINDLE FORCE ACTUATOR - An apparatus includes a circuit, a code modulator, and an actuator. The circuit is operable to detect displacements of a rotating object while in motion. The circuit is operable to detect a position of the displacements and to generate a signal associated therewith. The code modulator is operable to generate a modulated signal based on the position and the displacements. The actuator is operable to apply a force to the rotating object, wherein the force is based on the modulated signal. | 08-01-2013 |
20130241323 | STATOR ASSEMBLY SUPPORT - Provided herein is an apparatus, having a cylindrical structure extending from a base; a stator assembly having a stator ring and a plurality of stator teeth extending from an outer diameter of the stator ring; and a stator assembly support having a supporting means for supporting at least one of the stator ring or the plurality of stator teeth, wherein the stator assembly support is configured to dampen mechanical vibrations in the base. | 09-19-2013 |
20140077822 | NOISE MEASUREMENT FOR MEASURED DISPLACEMENT - An apparatus including a first plurality of electrodes and a second plurality of electrodes is disclosed. Each electrode of the first plurality of electrodes is configured to measure an electric field associated with a position of a moving object. The second plurality of electrodes is disposed further away from the moving object in comparison to the first plurality of electrodes. The second plurality of electrodes is configured to measure a signal associated with ambient noise. | 03-20-2014 |
20140078616 | FLUID DYNAMIC MOTOR WITH REDUCED VIBRATIONS - An apparatus includes a hub, a first disk, a second disk, and a spacer. The hub is supported for relative rotation about a stationary component. The first disk is mounted to the hub with a first dynamic resonance mode associated therewith. The second disk is mounted to the hub with a second dynamic resonance mode associated therewith. The spacer is positioned between the first disk and the second disk, wherein the spacer is operable to cause the first dynamic resonance mode to be different from the second dynamic resonance mode. | 03-20-2014 |
20140139237 | OFFSET REDUCTION FOR DISPLACEMENT SENSOR - A device including a displacement measurement circuitry and a charge adjuster circuitry is disclosed. The displacement measurement circuitry may be configured to measure displacement associated with a rotating object. The charge adjuster circuitry is coupled to the displacement measurement circuitry. The charge adjuster circuitry is configured to measure an offset associated with ambient noise in the device over time. The charge adjuster circuitry is further configured to adjust sensors of the displacement measurement circuitry to reduce the measured offset. | 05-22-2014 |
20140293479 | LOCKING DISK CLAMP - Provided herein is an apparatus, including a plurality of teeth extending from an outer perimeter of an annular disk clamp to an inner perimeter of the annular disk clamp and an annular groove in an outer perimeter of a hub, wherein the plurality of teeth do not engage the annular groove of the hub when the disk clamp is unlocked into an unlocked form, and wherein the plurality of teeth engage the annular groove of the hub when the annular disk clamp is locked into a locked form, clamping at least one disk onto the hub at a mounting point for the at least one disk. | 10-02-2014 |
20140293480 | NOTCHED DISK CLAMP - Provided herein is an apparatus, including a plurality of disk clamp notches spaced about an outer lip of an annular disk clamp; an annular groove in an outer perimeter of a hub; and a mounting point on the hub for at least one disk, wherein the annular disk clamp occupies the annular groove of the hub, clamping the at least one disk onto the hub at the mounting point for the at least one disk. | 10-02-2014 |
20140293483 | DISK CLAMP AND LOCK - Provided herein is an apparatus, including a clamping means for clamping at least one disk onto a hub at a mounting point on the hub for the at least one disk, wherein the clamping means is configured to sit wholly above the at least one disk; a seat in an outer perimeter of the hub configured to receive the clamping means; and a locking means for locking the clamping means onto the hub. | 10-02-2014 |
20140293484 | DISK CLAMP WITH FLANGES - Provided herein is an apparatus, including a plurality of flanges extending to form an inner perimeter of an inner opening of an annular disk clamp; and an annular groove in an outer perimeter of a hub configured to receive the plurality of flanges of the annular disk clamp, wherein the disk clamp is seated above at least one disk when clamping the at least one disk onto the hub at a mounting point for the at least one disk. | 10-02-2014 |
20140307989 | GROOVED THRUST BEARING - Provided herein is an apparatus, including an inner component, wherein the inner component includes a thrust plate; an outer component, wherein the inner component and the outer component are positioned for relative rotation, and wherein the inner component and the outer component are positioned to form at least one bearing having a groove pattern that imparts a predetermined direction to the rotational motion of the inner component and the outer component; and a gas inlet operable to receive a pressurized gas. | 10-16-2014 |
20140369630 | FLUID DYNAMIC BEARING RESERVOIR - Disclosed herein is an apparatus that includes a fluid dynamic bearing defined in a gap between an inner component and an outer component. In some instances, the inner component and the outer component are configured for relative rotation. In some instances, the apparatus further includes a fluid reservoir configured to supply a fluid to the fluid dynamic bearing and the fluid reservoir is defined by shearless surfaces. | 12-18-2014 |
20140369631 | BEARING GAP DETERMINED DEPTH AND WIDTH - Provided herein, is an apparatus that includes a fluid dynamic bearing defined in a gap between a stationary component and a rotatable component. The fluid dynamic bearing includes a first portion of the gap at an axial end of the fluid dynamic bearing, and a second portion of the gap. The first portion of the gap is narrower than the second portion of the gap. A groove in the fluid dynamic bearing on the stationary component or the rotatable component includes a portion of a predetermined width or a predetermined depth. The portion of the predetermined width or predetermined depth is selected based on the first gap or the second gap. | 12-18-2014 |
20150061438 | MAGNET CO-FORMED TO BACK IRON - An apparatus includes a hub. The apparatus also includes a back iron that is coupled to the hub. In addition, a magnetic annulus is co-formed to the back iron. | 03-05-2015 |
20150139574 | RADIAL CHANNEL WITH FLUID RESERVOIR - Provided is an apparatus, including a stationary component; a rotatable component, wherein the stationary component and the rotatable component are positioned for relative rotation; a first sealing means positioned in a radial channel at a first axial end of the rotatable component; a second sealing means positioned in an axial channel at a second axial end of the rotatable component; and a fluid reservoir adjacent to the first sealing means and extending radially outward from the first sealing means, wherein the fluid reservoir is positioned radially outward from the pump seal, and wherein the fluid reservoir extends radially outward from the pump seal. | 05-21-2015 |
20150162046 | APPARATUS WITH REPULSIVE FORCE BETWEEN STATIONARY AND ROTATABLE COMPONENTS - Provided herein, is an apparatus that includes a fluid dynamic bearing, a hub, and an induction housing. The fluid dynamic bearing is defined by a stationary component and a rotatable component. The hub is configured to rotate relative to the stationary component. A current is induced within the induction housing resulting from the relative rotation. The induced current creates a repulsive force between the stationary component and the hub. | 06-11-2015 |
Patent application number | Description | Published |
20120224184 | OPTICAL DETECTOR FOR DETECTING OPTICAL SIGNAL BEAMS, METHOD TO DETECT OPTICAL SIGNALS, AND USE OF AN OPTICAL DETECTOR TO DETECT OPTICAL SIGNALS - An optical detector for detecting an optical signal beam (OSB) modulated in a way that it includes an in-phase and/or a quadrature component, includes: a polarisation beam splitter arranged to split the OSB into two polarised OSBs; a non-polarisation beam splitter arranged to further split each of the two polarised OSBs into two split polarised OSBs; at least one birefringent element providing a phase shift, the birefringent element being arranged in a path of at least one polarised OSB and/or in a path of at least one split polarised OSB so that an in-phase and quadrature phase offset between two split polarised OSBs originating from the same polarised OSB is formed in output signal beams; and at least two detection means arranged to receive at least one output signal beam that includes a in-phase and/or quadrature component of the OSB. | 09-06-2012 |
20120321240 | ELECTRO-OPTICAL DEVICE AND METHOD FOR PROCESSING AN OPTICAL SIGNAL - An electro-optical device for processing an optical signal, comprises an electrode that is arranged and designed so that the optical signal at least partially intrudes the electrode when the optical signal is processed in the electro-optical device. An insulator is arranged adjacent to the electrode so that one face of the electrode contacts the insulator. A gate is arranged so that a voltage is applicable between the electrode and the gate such that a charge layer is induced on the face of the electrode that is contacting the insulator. | 12-20-2012 |
20130221550 | Method for producing photonic wire bonds - A method for making optical connections with optical waveguides includes mounting the optical waveguides or a device comprising the optical waveguides, on a component carrier. A partial region of the optical waveguides is embedded in a volume of resist material. Positions of the optical waveguides to be connected are detected with reference to a coordinate system using a measuring system. Favorable, three-dimensional geometries are determined for optical waveguide structures for connecting the optical waveguides to each other at predetermined connecting locations and the optical waveguide structure geometries are converted to a machine-readable dataset. The optical waveguide geometries in the volume of the resist material are three-dimensionally structured using a direct-writing lithography device operating on the basis of the machine-readable dataset. The structured resist material is treated using physical or chemical methods to form at least one optical waveguide structure having ends connected to predetermined connecting locations of the optical waveguides. | 08-29-2013 |
20130223788 | Photonic wire bonds - An optical arrangement includes a plurality of planar substrates with at least one planar integrated optical waveguide on each planar substrate. At least one optical waveguide structure has at least one end connected via an optical connecting structure to one of the planar integrated optical waveguides. The optical waveguide structure is positioned at least partly outside the integration plane for the planar integrated optical waveguide and a refractive index contrast between a core region and a cladding region of the optical waveguide structure is at least 0.01. | 08-29-2013 |
20130234698 | Integrated optical circuit and method for measuring current as well as sensor module and measuring device - In an integrated optical circuit, light from a light source is polarized and coupled to a first and second strip waveguide. A waveguide coupling element couples the two optical signals from the two strip waveguides to different polarization modes of an optical fiber line. The optical fiber line is connected to a measuring head, which reflects the optical signal and in which a phase difference between the two optical partial signals is modulated in a magnetic field. In the waveguide coupling element, the reflected signal is split into two optical partial signals having the same polarization and the phase difference between the two partial signals is determined. A phase modulator device provides for closed-loop operation. Compared to fiber-optical concepts, the number of splices is reduced. | 09-12-2013 |
20150049340 | OPTICAL COHERENCE TOMOGRAPHY WITH AN EXTENDED DYNAMIC RANGE - The invention lies in the field of optical metrology and relates to optical coherence tomography (OCT). In particular, the invention relates to an apparatus and a method for the depth-dependent adaptation of the dynamic range of an OCT system to the profile of the backscattered power to be measured. The dynamic range of the measuring method can therefore be decoupled from the dynamic range of the analogue/digital converter used. The invention is used, in particular, in the characterization of strongly scattering or strongly absorbing biological or technical samples. | 02-19-2015 |
20150070685 | MULTISCALE DISTANCE MEASUREMENT WITH FREQUENCY COMBS - The invention relates to a method and a corresponding apparatus for measuring distance and optionally speed, in particular for multiscale distance measurement. The method comprises generating a first and a second frequency comb signal ( | 03-12-2015 |