Directed placement of data in a redundant data storage system
Granted: January 24, 2012
Patent Number:
8103628
A data processing apparatus, comprising a metadata store storing information about files that are stored in a distributed data storage system, and comprising a class database; one or more processing units; logic configured for receiving and storing in the class database a definition of a class of data storage servers comprising one or more subclasses each comprising one or more server selection criteria; associating the class with one or more directories of the data storage system; in…
Methods and sytems for the destruction of perfluorinated compounds
Granted: December 20, 2011
Patent Number:
8080226
Methods and systems for the destruction of one or more PFCs in a gas stream are provided. The gas stream can come from semiconductor processing, for example. The PFCs in the gas stream are reacted with steam in the presence of a catalyst to fragment the PFCs into other compounds that are readily removed from the gas stream. The catalyst comprises gallium, and can additionally comprise zirconium oxide. The gas stream can also be pre-treated prior to reacting the PFCs with steam to remove…
Methods and system for efficient data transfer over hybrid fiber coax infrastructure
Granted: November 22, 2011
Patent Number:
8064479
The invention is directed to a method for providing client-server data transfer over a Hybrid Fiber Coax network, comprising interfacing, at a client, a channel, wherein the channel is one of a video channel and a DOCSIS channel, intercepting a content request made from an end-user computing device, notifying a server of a relevant intercepted message via one of using an interactive channel and tagging the request, selecting content sent by the server over the channel, processing the…
Method for manufacturing rigid internal gear of wave gear device
Granted: November 8, 2011
Patent Number:
8051566
A method for manufacturing a rigid internal gear of a wave gear device in which an internally toothed portion formed with internal teeth and a gear main body portion are joined integrally, the method including preforming an internal teeth-forming ring or disc for forming the internally toothed portion by using a first aluminum alloy powder; manufacturing a forging in which the internal teeth-forming ring or disc is placed in a forging die and is integrally formed on its outer side with…
Method for adjusting galvano scanner system
Granted: November 8, 2011
Patent Number:
8054521
In a galvano scanner system (1), a light position detection unit (30) is mounted so as to match the scanning center of the workpiece surface (7), the light position detection unit being provided with a two-dimensional light position sensor (32) disposed in the center and four one-dimensional light position sensors (33(1)) to (33(4)) concyclically disposed at equal angles about the center of the two-dimensional light position sensor. An origin position command is given to galvano scanners…
Method for optimizing the forward error correction scheme
Granted: October 11, 2011
Patent Number:
8037392
The present invention relates to a method for optimizing the FEC scheme comprising the steps of (a) receiving a batch of data packets designated for transmission; (b) choosing a number of divisors having no common denominators in accordance with the said batch of data packets; (c) organizing into blocks said batch of data packets a number of times in accordance with the number of divisors using said divisors; and (d) creating a FEC packet for each of said blocks.
Method for setting gear tooth profile in flat wave gear device on side where gears have same number of teeth
Granted: October 4, 2011
Patent Number:
8028603
In a flat wave gear device in which a flexible externally toothed gear and the rigid internally toothed gear have the same number of teeth, an arcuate tooth profile is imparted to a flexible externally toothed gear, a contact point C between tooth profiles of a flexible externally toothed gear and a D-side rigid internally toothed gear is determined from an arc center A of the arcuate tooth profile of the flexible externally toothed gear and from a momentary center S of relative movement…
Method for adjusting drive characteristics of scanner driver of galvanometric scanner
Granted: October 4, 2011
Patent Number:
8031385
A scanner driver of a galvanometric scanner system includes an analog drive circuit; a control unit 31 for storing and holding optimized data formed from combinations of optimal values of circuit constants set in advance in accordance with a plurality of drive modes of a galvanometric scanner; and an electronic trimmer for changing the circuit constants of the analog drive circuit. The control unit selects one of the optimized data in accordance with an external input, and sets or…
Four wave mixing suppression
Granted: October 4, 2011
Patent Number:
8032029
Methods, systems and computer program products for countering the effects of four wave mixing are described. In one implementation, a controller can be used to shift an operating wavelength of an optical transmitter away from a zero-dispersion wavelength through which signals of the optical transmitter are transmitted. The controller can perform the shifting process while allowing sufficient margin for division multiplexing and minimal dispersion. The controller may determine an…
Ball screw/nut type linear actuator
Granted: September 20, 2011
Patent Number:
8020462
A ball screw/nut type linear actuator (1) where a ball nut (32) moves in forward-backward directions by rotation of a ball screw shaft (31) connected to a motor (22), wherein the ball screw shaft (31) is connected and fixed, in a small diameter hollow section (22c) of the motor shaft (22), to the motor shaft so that a part of the locus of the movement of the ball nut (32) also enters into a large diameter hollow section (22a) of the motor shaft (22). The construction eliminates the need…
Method of fastening gear and structure of the same
Granted: September 20, 2011
Patent Number:
8020299
In a fastening method of press-fitting and fixing an axial end section of a second-stage pinion (1) into a circular opening (21) of a first-stage planetary carrier (2), first press-fitting external teeth (13a), which have an addendum circle larger than an addendum circle of the other pinion part and has a sharp tooth top, are generated through manufacturing of tooth-cutting at an outer circumferential section of the axial end portion of the second-stage pinion (1). Then, a press-fit bore…
Wave generator, wave gear device, and method of preventing reduction in efficiency of wave gear device
Granted: September 6, 2011
Patent Number:
8011273
A wave generator (4) of a wave gear device (1) is formed from a material in which only the minor axis-side portions (51, 52), which include the two end portions (51a, 52a) of an elliptical minor axis Lmin, has a larger coefficient of linear expansion than the other portions. When the temperature of a rigid cam plate (5) increases during high-speed rotational input, the minor axis-side portions (51, 52) thermally expand considerably more than the other portions do, and balls (10) other…
Method for compensating for angular transmission error of an actuator
Granted: September 6, 2011
Patent Number:
8013560
The non-linear elastic deformation component included in the angular transmission error of an actuator provided with a wave gear drive is a component of the angular transmission error occurring due to elastic deformation of a flexible externally-toothed gear when the direction of rotation of the motor shaft changes. This component can be analyzed by driving the motor in a sine-wave shape. A model of the non-linear elastic deformation component (non-linear model) obtained from the…
Multiple-rotation absolute-value encoder of geared motor
Granted: August 9, 2011
Patent Number:
7994749
A multiple-rotation absolute-value encoder of a geared motor, wherein the geared motor (10) reduces the rotational speed of a motor shaft (12) and takes it out from a gear shaft (14) to drive a machine device (15) in an operating range corresponding to two rotations of the gear shaft (14). The multiple-rotation absolute-value encoder (20) fitted to the geared motor (10) is made up of a gear shaft absolute value encoder (30) for detecting the absolute position of the gear shaft (14) and a…
Drive control method for galvano-scanner
Granted: July 19, 2011
Patent Number:
7982933
A galvano-scanner system (1) has a position-controlling microcomputer (31) mounted on a scanner driver (3) of a galvano scanner (2), wherein a position detection signals outputted from a positional sensor (14) of the galvano-scanner (2) are sampled, the current position of the galvano-scanner (2) is updated on the basis of sampling results, when movement distance amount command data are input, the movement distance amount command data are converted to an address change amount for the…
Real time bit rate switching for internet protocol television
Granted: July 12, 2011
Patent Number:
7979885
A method, apparatus and computer program product are provided for delivering television programming to a subscriber. In one aspect the method includes receiving one or more channels of program content, and encoding each channel a plurality of times, each time at a different rate producing multiple rate encoded signals for each channel. The method can further include transmitting the multiple rate encoded signals to a central office over a network, determining an available bandwidth of a…
Finger joint mechanism
Granted: June 28, 2011
Patent Number:
7966907
A finger joint mechanism (1) having two wave gear reduction drives (20, 30) disposed coaxially with each other, in which rotational force of a motor (40) is transmitted to a rotation input shaft (13) common to the drive gears through a driving bevel gear (42) and a driven bevel gear (43). Output shafts (11, 12) are formed integrally with bosses (24, 34) of the cup-like flexible external gears (22, 32) of the wave gear drives (20, 30), and mounting arms (9, 10) of a rotating member (3)…
Power-off electromagnetic brake
Granted: June 21, 2011
Patent Number:
7963374
The power-off electromagnetic brake (2) attracts an armature that is pressed by a spring force to a rotating member by a magnetic attraction force that is generated by energizing an exciting coil, and brake force that is acting on the rotating member is released. A voltage control circuit (12) continuously energizes the exciting coil for a fixed length of time and generates a considerable magnetic attraction force in order to attract the armature to a yoke when a brake power source (14)…
Finger unit for robot hand and method of assembling the same
Granted: June 14, 2011
Patent Number:
7959199
A multi-joint finger unit (1) has first and second joint sections (3, 5) constructed by using bevel gears. In each joint section (3, 5), the section where a driving bevel gear (10, 44) and a driven bevel gear (14, 56) mesh with each other and also a bearing section of a joint shaft (15, 57) are assembled in a tubular housing (13, 51) whose forward end is closed. Rear end openings (13A, 52) of the tubular housings (13, 51) are closed by a tubular housing (7) at a finger root and a tubular…
Roll rotation mechanism
Granted: June 7, 2011
Patent Number:
7955005
In a roll rotation mechanism (1) for continuously causing a film-rolling roll to rotate at a constant rate, an Oldham coupling (4) is interposed in a transmission path between a wave gear reduction mechanism (3) and a roll (10). The Oldham coupling (4) forms a connection between a gear rotation output shaft (34) and a roll rotation shaft (11) in a state in which latitude of movement ? is present about a central axis line (4a). When a roll (10) is continuously rotated at a constant rate,…
