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| Number | Title | Issue Date |
| 7165947 | Screw compressor capable of manually adjusting both internal volume ratio and capacity and combined screw compressor unit accommodating variation in suction or discharge pressure A screw compressor is equipped with a manually operated internal volume ratio adjusting slide valve and capacity adjusting slide valve. The compressor is simple in construction, can be produced with low cost, can accommodate decrease in suction pressure, for example... | 01/23/2007 |
| 6881040 | Multi-stage screw compressor unit accommodating high suction pressure and pressure fluctuations and method of operation thereof A multi-stage screw compressor unit and method of operation thereof are provided, which enable operation with high efficiency always even when suction or discharge pressure fluctuates widely, the compressor unit comprising a combination of a compression stage provid... | 04/19/2005 |
| 6659729 | Screw compressor equipment for accommodating low compression ratio and pressure variation and the operation method thereof The invention provides a method of operating a screw compressor equipment without reducing the efficiency, in which a screw compressor 1 of which the internal volume ratio is variable by means of an internal volume ratio control valve is driven by a drivi... | 12/09/2003 |
| 6585801 | Operating method of gas engine accommodating to sour gas and the system thereof The operating system of a gas engine accommodating to sour gas comprises a sour gas compressing and feeding part including a compressor 11 and a gas engine 12, a pre-membrane-treatment 13 for obtaining a compressed gas of proper temperature 13a removed of... | 07/01/2003 |
| 6560058 | Positioning control device, changeable magnetic disc device, and head control method A positioning control device is provided which is capable of avoiding the limit cycle in which the head moves back and forth between two dead zones on both sizes of the center of the target track. When a magnetic head is in the dead zone and the head posi... | 05/06/2003 |
| 6510016 | Head positioning control system for disk drive A positioning control system for a disk drive can reduce static friction of the sliding type actuator to be a cause of degradation of low order spindle rotation synchronization run-out. The positioning control system includes position error detecting mean... | 01/21/2003 |
| 6414812 | Medium replacement type disc apparatus The frequency rectification filter, in principle, measures an amplitude and phase of a particular frequency and compresses the frequency. Accordingly, if no initial value is present, it is necessary to take a time more than one turning cycle. Consequently... | 07/02/2002 |
| 6342987 | Head positioning mechanism for magnetic disk device provided with micro tracking actuator using magnetic force drive control method therefor In a head positioning mechanism has a micro tracking actuator which is between a carriage and a supporting spring for making the supporting spring be rotated relative to the carriage to adjust a position of a magnetic head, the micro tracking actuator has... | 01/29/2002 |
| 6320720 | Head-positioning system with an improved fine tracking actuator control scheme To provide head-positioning system which can control tracking movement of the magnetic head reliably and smoothly with a high speed, enlarging the controllable frequency band of a fine tracking actuator by suppressing interference between the fine trackin... | 11/20/2001 |
| 6202424 | System for compressing contaminated gas The object of the present invention is to provide a compression system to effectively compress contaminated gas containing water and other corrosive substances (natural gas) without suffering any adverse effects caused by toxic substances, including impur... | 03/20/2001 |
| 6061208 | Magnetic disc device with stopper on carriage to limit rotational movement of support spring A head positioning mechanism for a magnetic disc device includes a support spring having one end portion that supports a magnetic head, and the other end portion at which a rotating shaft is disposed. A carriage has one end portion that pivotally supports... | 05/09/2000 |
| 6043957 | Head positioning mechanism for magnetic disk device provided with micro tracking actuator using magnetic force and drive control method therefor In a head positioning mechanism has a micro tracking actuator which is between a carriage and a supporting spring for making the supporting spring be rotated relative to the carriage to adjust a position of a magnetic head, the micro tracking actuator has... | 03/28/2000 |
| 5867342 | Tracking servo system for magnetic disc drive with reduced head-settling time A state variable estimator is operative, in a change-over of a magnetic head, to determine a predicted value of a state variable of a frequency-shaped filter in a follow-up to a track after the change-over based on a current head position of thereof befor... | 02/02/1999 |
| 5465183 | Control system for positioning head in disk device by estimating and correcting actuator parameters based on head position and actuator drive current obtained by vibrating the head A control system rotates disks as information storage media to position a head in a disk drive that records or reproduces data. An actuator swings the head in the radial direction of the disk. Positioning of the head is performed by a servo control system... | 11/07/1995 |
| 4974373 | Abrasive tools An abrasive tool comprises a base and an abrasive powder bonded to the base in the form of a single-layer structure in which the particles do not substantially overlap or rest one upon another. For the bonding purpose the abrasive powder is either dispers... | 12/04/1990 |
