Patents by Inventor Katsuhiko Arai
Katsuhiko Arai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7004734Abstract: An inlet port 15 is divided into a plurality of holes 15a, 15b, 15c, 15 by ribs 61a, 61b, 61c. For example, when liquid refrigerant is compressed within a compression chamber, the inlet valve 21 receives excessive load which is about to bend the inlet valve 21 largely toward the suction chamber side. However, the inlet valve 21 is supported by the ribs 61a, 61b, 61c, and therefore the inlet valve 21 is hardly bent, but the inlet port 21 is positively closed.Type: GrantFiled: January 15, 2001Date of Patent: February 28, 2006Assignee: Zexel Valco Climate Control CorporationInventors: Ryosuke Izawa, Minoru Kanaizuka, Katsuhiko Arai, Katsumi Sakamoto
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Publication number: 20040076535Abstract: An inlet port 15 is divided into a plurality of holes 15a, 15b, 15c, 15 by ribs 61a, 61b, 61c. For example, when liquid refrigerant is compressed within a compression chamber, the inlet valve 21 receives excessive load which is about to bend the inlet valve 21 largely toward the suction chamber side. However, the inlet valve 21 is supported by the ribs 61a, 61b, 61c, and therefore the inlet valve 21 is hardly bent, but the inlet port 21 is positively closed.Type: ApplicationFiled: July 11, 2003Publication date: April 22, 2004Inventors: Ryosuke Izawa, Minoru Kanaizuka, Katsuhiko Arai, Katsumi Sakamoto
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Patent number: 6022199Abstract: A reciprocating compressor is provided. Compression chambers are formed on at least one end of pistons slidably received within respective cylinder bores of a cylinder block. A cylinder head is secured to the cylinder block and has a high-pressure chamber and a low-pressure chamber formed therein. A separating member is arranged between the cylinder block and the cylinder head. The separating member has a valve sheet, a valve plate, a stopper plate. The valve sheet is formed with suction valves and discharge valves. The valve plate is arranged between the valve sheet and the cylinder block, and formed with refrigerant outlet ports and relief holes each opening into a corresponding one of the compression chambers, for communicating with a corresponding one of refrigerant inlet ports formed through the stopper plate when the corresponding suction valve opens.Type: GrantFiled: April 20, 1998Date of Patent: February 8, 2000Assignee: Zexel CorporationInventors: Kiyoshi Yoshii, Katsutoshi Enomoto, Katsuhiko Arai, Hisao Ichikawa
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Patent number: 5943943Abstract: A reciprocating compressor includes a cylinder block, a plurality of cylinder bores extending through the cylinder block, and a plurality of pistons slidably received in the plurality of cylinder bores, respectively. The cylinder block and the pistons are each formed of an aluminum-based material, and each of the plurality of pistons has a peripheral surface thereof covered with a thermal sprayed coating which is formed of a material having a smaller coefficient of linear expansion than one of the aluminum-based material. The thermal sprayed coating covering each of the pistons has at least one slit formed thereacross in a manner such that each of the at least one slit extends from the one end of each of the pistons to the other end of the same whereby part of the peripheral surface of the piston is exposed through the at least one slit.Type: GrantFiled: December 30, 1997Date of Patent: August 31, 1999Assignee: Zexel CorporationInventor: Katsuhiko Arai
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Patent number: 5800147Abstract: There is provided a swash plate compressor which ensures reduction of pulsation of refrigerant gas during operation thereof and at the same time enhances mechanical efficiency of the compressor. Refrigerant gas delivered from front-side compression chambers is introduced into a front-side discharge chamber, and refrigerant gas delivered from rear-side compression chambers is introduced into a rear-side discharge chamber. At least two refrigerant outlet passages each arranged in a fashion parallel with a plurality of cylinder bores which extend longitudinally through a cylinder block communicate the front-side discharge chamber with the rear-side discharge chamber. A discharge port which is formed in a head secured to a front-side end or rear-side end of the cylinder block permits the refrigerant gas within the front-side and rear-side discharge chambers to be discharged out of the head. One of the at least two refrigerant outlet passages is communicated with the discharge port.Type: GrantFiled: April 1, 1997Date of Patent: September 1, 1998Assignee: Zexel CorporationInventors: Katsuhiko Arai, Katsutoshi Enomoto, Kiyoshi Yoshii, Hisao Ichikawa
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Patent number: 5709535Abstract: A reciprocating compressor includes a cylinder block having a plurality of compression chambers formed therein and a cylinder head secured to the cylinder block and having a high-pressure chamber formed therein. A first member is arranged between the cylinder block and the cylinder head and has a plurality of discharge ports formed therethrough for communicating the plurality of compression chambers to the high-pressure chamber. The reciprocating compressor comprises a second member having a plurality of discharge valves formed therewith for opening and closing the plurality of discharge valves, and a third member having a plurality of stoppers formed therewith for each setting a proper limit to resilient deformation of a corresponding one of the plurality of stoppers.Type: GrantFiled: April 17, 1996Date of Patent: January 20, 1998Assignee: Zexel CorporationInventors: Katsutoshi Enomoto, Hisao Ichikawa, Kiyoshi Yoshii, Katsuhiko Arai
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Patent number: 5225960Abstract: Disclosed is a ceramic capacitor of a mono-layer structure or a multi-layer structure, which has characteristic X7R (characteristic B) and which is high in reliability in direct current breakdown voltage at 125.degree. C. and small in size. The ceramic capacitor has a dielectric layer and internal electrodes disposed so as to interpose the dielectric layer. The dielectric layer is composed of a sintered body of ceramic particles whose core sections are made mainly of BaTiO.sub.3 and whose shell sections are made from BaTiO.sub.3 in the form of a solid solution composed of an oxide of one or more than one element selected from Mg, Ca, Sr and Zn and an oxide of one or more than one element selected from Sc, Y, Gd, Dy, Ho, Er, Yb, Tb, Tm and Lu.Type: GrantFiled: March 16, 1992Date of Patent: July 6, 1993Assignee: Taiyo Yuden KabushikigaishaInventors: Hiroshi Kishi, Hiroshi Saito, Hisamitsu Shizuno, Yuji Nishi, Katsuhiko Arai
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Patent number: 5057387Abstract: A lithium cell comprising a negative electrode containing lithium, a positive electrode, and an electrolyte disposed between the positive and negative electrodes is improved in internal resistance and shelf life when the negative electrode is surface treated with a composition containing from more than 1% to 5% by weight of water.Type: GrantFiled: May 16, 1990Date of Patent: October 15, 1991Assignee: Bridgestone CorporationInventors: Yoshitomo Masuda, Masao Ogawa, Katsuhiko Arai, Kinya Suzuki, Tadashi Fuse, Tetsuro Amano
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Patent number: 5026316Abstract: A variable capacity wobble plate compressor includes a drive shaft arranged in a housing, bearings arranged in a portion of a cylinder block of the housing toward a crankcase within the housing for rotatably supporting the drive shaft, and a fixing member inserted into a portion of the cylinder block toward a discharge pressure chamber for fixing discharge valves in place. A high pressure-introducing passage is formed through the fixing member and extends from the discharge pressure chamber to the bearings. The high pressure-introducing passage introduces compression medium having high pressure from the discharge pressure chamber to the bearings so that the compression medium having high pressure leaks through the bearings into the crankcase.Type: GrantFiled: March 28, 1990Date of Patent: June 25, 1991Assignee: Diesel Kiki Co., Ltd.Inventors: Juetsu Kurosawa, Katsuhiko Arai
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Patent number: 4960657Abstract: A lithium cell comprising a negative electrode containing lithium, a positive electrode, and an electrolyte disposed between the positive and negative electrodes is improved in internal resistance and shelf life when the negative electrode is surface treated with water, lithium hydroxide, a PF.sub.6 ion-containing compound, or an AsF.sub.6 ion-containing compound.Type: GrantFiled: February 21, 1989Date of Patent: October 2, 1990Assignee: Bridgestone CorporationInventors: Yoshitomo Masuda, Masao Ogawa, Katsuhiko Arai, Kinya Suzuki, Tadashi Fuse, Tetsuro Amano
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Patent number: 4939050Abstract: An electric cell comprising a positive electrode, a negative electrode, and an electrolyte maintains excellent performance when the positive electrode is an electro-conductive polymer composite including a mesh stainless steel having a wire diameter of about 35-120 .mu.m and an electro-conductive polymer, typically polyaniline, integrally deposited onto the mesh by electrolytic polymerization. A container having the elements received therein is provided with a vent mechanism.Type: GrantFiled: November 10, 1988Date of Patent: July 3, 1990Assignees: Bridgestone Corporation, Seiko Electronic Components, Ltd.Inventors: Shinichi Toyosawa, Isamu Shinoda, Katsuhiko Arai, Toyoo Harada, Yuko Maeda, Hideharu Daifuku, Shigeru Kijima, Kinya Suzuki, Yoshitomo Masuda, Masao Ogawa, Takahiro Kawagoe, Tadashi Fuse, Tetsuro Amano
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Patent number: 4906538Abstract: A non-aqueous secondary cell comprising a positive electrode, a negative electrode and a non-aqueous electrolyte is provided wherein the positive electrode comprises as an active material polyaniline containing 15 to 30% by weight of BF.sub.4.Type: GrantFiled: March 18, 1988Date of Patent: March 6, 1990Assignee: Bridgestone CorporationInventors: Shinichi Toyosawa, Shigeru Kijima, Hideharu Daifuku, Yuko Maeda, Katsuhiko Arai, Takahiro Kawagoe
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Patent number: 4904553Abstract: A polyaniline is highly conductive and less corrosive when it contains up to 7 mol % of benzenoid-ammonium salt state and up to 25 mol % of quinoid-diimine state, based on the total molar amount of the polyaniline.Type: GrantFiled: June 24, 1988Date of Patent: February 27, 1990Assignee: Bridgestone CorporationInventors: Tadashi Nakajima, Shinichi Toyosawa, Shigeru Kijima, Katsuhiko Arai, Yuko Maeda, Masao Ogawa, Takahiro Kawagoe, Yasuhiro Iino, Ryuzo Osawa, Yuichi Ishino
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Patent number: 4747014Abstract: A reduction-reoxidation type semiconductor ceramic capacitor according to the first invention includes: semiconductor ceramic; a reoxidated dielectric layer formed on the surface of the semiconductor ceramic; at least a pair of electrodes formed on the reoxidated dielectric layer; one of the electrodes being formed with an electrical conductor containing one kind or more of metals or metal compounds selected from Zn, Al, Ni, and Sn; one kind or more of metals in extremely small quantities selected from the metals being diffused into the interior of a portion, in contact with said electrode, of the reoxidated dielectric layer.In addition, a method of manufacturing of the reduction-reoxidation type semiconductor ceramic capacitor comprising the steps of: rendering the semiconductor ceramic to a heat treatment at temperature of from 950.degree. to 1200.degree. C.Type: GrantFiled: February 25, 1987Date of Patent: May 24, 1988Assignee: Taiyo Yuden Kabushiki KaishaInventors: Daisuke Kaino, Katsuhiko Arai, Junichi Watanabe, Kazuo Sasazawa
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Patent number: 4742029Abstract: A process for producing a normal sintered cubic silicon carbide which comprises sintering cubic silicon carbide powder made up of crystallites of more than 480 .ANG. in size determined from the reflection in the (4 2 0) plane measured by the powder X-ray diffraction method.Type: GrantFiled: June 18, 1985Date of Patent: May 3, 1988Assignee: Bridgestone CorporationInventors: Yasuo Kurachi, Katsuhiko Arai, Koichi Irako
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Patent number: 4702900Abstract: In a method of producing silicon carbide by heating starting materials comprising siliceous material and carbonaceous material in a non-oxidizing atmosphere, those ingredients contained in gases evolved upon heating and solidified at a low temperature into impurities for silicon carbide are eliminated from the atmosphere during heating.Type: GrantFiled: April 8, 1986Date of Patent: October 27, 1987Assignee: Bridgestone CorporationInventors: Yasuo Kurachi, Katsuhiko Arai, Hiroaki Wada, Yoji Watabe, Sanae Irako
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Patent number: 4393015Abstract: A process for producing urethane-modified polyisocyanurate foams in which a poly(oxyalkylene-oxyethylene)polyether polyol is used as a modifying agent having the number of functional groups and the molecular weight in specific ranges with the equivalent ratio of NCO/OH being in a specific range and containing a specific quantity of ethylene oxide. The use of this modifying agent provides urethane-modified polyisocyanurate foams exhibiting excellent fire resistance and adhesion to an object surface.Type: GrantFiled: January 5, 1982Date of Patent: July 12, 1983Assignee: Bridgestone Tire Co., Ltd.Inventors: Hiroshi Kaneda, Katsuhiko Arai, Akira Suzuki, Takashi Ohashi
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Patent number: 4296170Abstract: A fireproof laminate passing Grade 2 incombustibility according to Japanese Industrial Standard (JIS) A-1321 combustion test is disclosed. The laminate comprises a urethane modified polyisocyanurate foam as a core material and an aluminum foil with a thickness of not less than 0.015 mm as a front surface material piled on the foam through self-adhesion of the foam. When the foam is produced by reacting an organic polyisocyanate with polyols as a modifier in the presence of an isocyanate trimerization catalyst, a blowing agent and other additives, a combination of particular low molecular weight diols with particular high molecular weight polyols is used as the polyol in a special weight ratio and a special total amount per 100 parts by weight of the organic polyisocyanate.Type: GrantFiled: March 6, 1980Date of Patent: October 20, 1981Assignee: Bridgestone Tire Company LimitedInventors: Takashi Ohashi, Toru Okoyama, Katsuhiko Arai
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Patent number: 4292361Abstract: A fireproof laminate passing Grade 2 incombustibility according to Japanese Industrial Standard (JIS) A-1321 combustion test is disclosed. The laminate comprises a urethane modified polyisocyanurate foam as a core material and particular surface materials piled on both sides of the foam through self-adhesion of the foam and has a density of the core material of 0.02-0.04 g/cm.sup.3 and a total thickness of not more than 30 mm.Type: GrantFiled: August 20, 1979Date of Patent: September 29, 1981Assignee: Bridgestone Tire Co., Ltd.Inventors: Takashi Ohashi, Toru Okuyama, Akira Suzuki, Katsuhiko Arai
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Patent number: 4292353Abstract: A laminate having excellent flameproofing and low-smoke development is disclosed. The laminate comprises an urethane modified polyisocyanurate foam as a core material and an aluminum foil or sheet as a surface material piled on at least one surface of the foam through a self-adhesion of the foam and passes Grade 2 incombustibility according to Japanese Industrial Standard (JIS) A-1321 combustion test.Type: GrantFiled: November 13, 1978Date of Patent: September 29, 1981Assignee: Bridgestone Tire Co., Ltd.Inventors: Takashi Ohashi, Toru Okuyama, Akira Suzuki, Katsuhiko Arai, Minoru Kojima, Yoshiko Taniguchi, Masako Yoshida, Ryozo Sakata, Hideki Sugihara, Masashi Dobashi, Hirobumi Ohwada