Tsutomu Ishikawa
Tsutomu Ishikawa, Gunma JP
Patent application number | Description | Published |
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20110020158 | RECIPROCATING COMPRESSOR - A compressor includes a cylinder block including cylinder bores and pistons within the cylinder bores. A front housing opposes a first cylinder block end face to form a crank chamber accommodating a piston driving mechanism. A valve plate opposes a second cylinder block end face and includes suction and discharge holes. A rear housing includes suction and discharge chambers and opposes the second cylinder block end face with the valve plate there between. Strap-shaped suction valves on the valve plate end face oppose the cylinder block, thereby opening and closing the suction holes at tip portions. Discharge valves on the valve plate end face oppose the rear housing to open and close the discharge holes. Through-bolts join the front housing, the crank chamber, the cylinder block, the valve plate, and the rear housing. The valve plate includes grooves extending from holes accommodating the through-bolts to portions abutting the suction valves. | 01-27-2011 |
20110290348 | Compressor Valve Plate Device - Provided is a specific structure for a compressor valve plate device, which can ensure smooth operation of a suction valve in terms of suction valve sticking force due to lubricant oil, and can be mass-produced at low cost with high efficiency. The compressor valve plate device comprises; a valve plate having a suction hole and a discharge hole; a suction valve; and a discharge valve. At least a part of a gas filling chamber capable of introducing and filling gas with a higher pressure than suction gas pressure in a suction chamber between the valve plate and the suction valve is constituted in the valve plate, while a communication hole communicating with a surface at the valve closing side of the suction valve is provided to the valve plate. At least a part of a gas introduction route for introducing the higher-pressure gas into the communication hole is formed on the discharge valve formed from a thin plate. In addition, a part of the gas introduction route formed on the discharge valve is sealed by a member disposed on a surface facing the discharge valve. | 12-01-2011 |
20110300009 | Method of Processing Contact Portions between Valve Plate and Suction Valve and/or Discharge Valve of Reciprocating Compressor, and Reciprocating Compressor - [Object of the Invention] An object of the present invention is to provide a method for processing contact portions between a valve plate and a suction valve and/or discharge valve of a reciprocating compressor to prevent the suction valve and/or the discharge valve from sticking on the valve plate at the portions contacting the valve plate, the productivity thereof being higher than that of the conventional method. | 12-08-2011 |
Tsutomu Ishikawa, Isesaki-Shi JP
Patent application number | Description | Published |
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20130089445 | Variable-Displacement Compressor - In a swash plate type variable capacity compressor that changes a stroke of a piston by controlling the pressure of a crank chamber | 04-11-2013 |
20130101443 | Variable Capacity Compressor - Lubricating performance and durability of a variable capacity compressor are secured. A first communication hole | 04-25-2013 |
20140377087 | Variable Displacement Compressor - Variable displacement compressor, with center bore | 12-25-2014 |
Tsutomu Ishikawa, Ota-Shi JP
Patent application number | Description | Published |
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20130272903 | Refrigerant Compressor - In a cylinder head | 10-17-2013 |
20130287618 | Refrigerant Compressor - Oil recirculation mechanism includes an oil separation portion (separation chamber | 10-31-2013 |
Tsutomu Ishikawa, Yokohama-Shi JP
Patent application number | Description | Published |
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20130308666 | SEMICONDUCTOR LASER - A semiconductor laser includes: a first reflector that is provided in a gain region and has a sampled grating in which a plurality of segments are combined; and a second reflector that is optically connected to the first reflector and has a sampled grating in which a plurality of segments are combined, the plurality of segments of the first reflector having a short-segment region and a long-segment region, the long-segment region having an optical length that is larger than that of the short-segment region and being positioned closer to the second reflector than at least one of the short-segment region, the optical length of the long-segment region being larger than that of the short-segment region in a range of integral multiple (n≧1) plus-minus 25% of the optical length of the short-segment. | 11-21-2013 |
Tsutomu Ishikawa, Yokohama JP
Patent application number | Description | Published |
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20130039370 | METHOD OF CONTROLLING WAVELENGTH-TUNABLE LASER - A method of controlling a wavelength-tunable laser selecting an oscillation wavelength with a combination of a plurality of wavelength selection portions of which wavelength peak is different from each other, comprising: a first step of confirming a control direction of the wavelength selection portion in a case where a setting value is changed from a first setting value for achieving the first wavelength to a second setting value for achieving the second wavelength; a second step of setting a setting value that is shifted from the second setting value in a direction that is opposite of a pre-determined changing direction on the wavelength selection portion as a prepared setting value, when the control direction confirmed in the first step is opposite to the pre-determined changing direction; and a third step of changing the prepared setting value set in the second step to the second setting value. | 02-14-2013 |