Patents by Inventor Tsuyoshi Itsukaichi
Tsuyoshi Itsukaichi 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: 7842383Abstract: A thermal spraying powder contains granulated and sintered particles of an yttrium-aluminum double oxide formed by granulating and sintering raw-material particles. The crushing strength of the granulated and sintered particles is 15 MPa or more, and 10% particle size of the granulated and sintered particles is 6 ?m or more. The thermal spraying powder is suitable for use in forming a thermal spray coating through plasma spraying.Type: GrantFiled: November 30, 2005Date of Patent: November 30, 2010Assignee: Fujimi IncorporatedInventors: Junya Kitamura, Hiroaki Mizuno, Tsuyoshi Itsukaichi
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Patent number: 7282079Abstract: A thermal spray powder includes cermet particles. Each cermet particle includes tungsten carbide particles having a mean primary particle size of 3 to 9 ?m and metal particles or ceramic particles containing chrome. The mean particle size of the cermet particles is preferably from 2 to 50 ?m and the compression strength of each cermet particle is preferably from 400 to 900 MPa. Such a thermal spray powder enables the formation of a thermal sprayed coating which has both excellent cavitation erosion resistance and slurry erosion resistance.Type: GrantFiled: December 22, 2004Date of Patent: October 16, 2007Assignee: Fujimi IncorporatedInventors: Hiroaki Mizuno, Tsuyoshi Itsukaichi
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Patent number: 7279221Abstract: A thermal spraying powder includes granulated and sintered particles of an yttrium-aluminum double oxide obtained by granulating and sintering a raw powder containing yttrium and aluminum. The total volume of fine pores having a diameter of 6 ?m or less in one gram of the granulated and sintered particles is 0.06 to 0.25 cm3. The thermal spraying powder reliably forms a thermal spray coating that is suitable for use where the thermal spray coating is subjected to a thermal shock in a corrosive atmosphere or an oxidative atmosphere and for use where the thermal spray coating is subjected to a thermal shock in a state where the thermal spray coating contacts a member that has reactivity to a base material.Type: GrantFiled: February 15, 2006Date of Patent: October 9, 2007Assignee: Fujimi IncorporatedInventors: Junya Kitamura, Hiroaki Mizuno, Tsuyoshi Itsukaichi
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Publication number: 20070166478Abstract: A thermal spray powder of the present invention includes particles composed of molybdenum disulfide, and a coating layer provided on the surface of each of the particles. The coating layer is composed of a metal that is softened or melted at a temperature lower than the heat decomposition temperature of the molybdenum disulfide. The coating layer is preferably composed of copper. The thermal spray powder suppresses heat decomposition of the molybdenum disulfide contained in the thermal spray powder during thermal spraying.Type: ApplicationFiled: March 13, 2007Publication date: July 19, 2007Inventors: Tsuyoshi Itsukaichi, Satoru Osawa, Isao Aoki
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Publication number: 20060182969Abstract: A thermal spraying powder includes granulated and sintered particles of an yttrium-aluminum double oxide obtained by granulating and sintering a raw powder containing yttrium and aluminum. The total volume of fine pores having a diameter of 6 ?m or less in one gram of the granulated and sintered particles is 0.06 to 0.25 cm3. The thermal spraying powder reliably forms a thermal spray coating that is suitable for use where the thermal spray coating is subjected to a thermal shock in a corrosive atmosphere or an oxidative atmosphere and for use where the thermal spray coating is subjected to a thermal shock in a state where the thermal spray coating contacts a member that has reactivity to a base material.Type: ApplicationFiled: February 15, 2006Publication date: August 17, 2006Inventors: Junya Kitamura, Hiroaki Mizuno, Tsuyoshi Itsukaichi
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Publication number: 20060134343Abstract: A thermal spraying powder is characterized in that 90% particle size D90 of the thermal spraying powder is 15 ?m or less. The thermal spraying powder is also characterized in that the ratio of the total volume of particles having a particle size of 1 ?m or less to the total volume of all particles in the thermal spraying powder is 2% or less. A value obtained by dividing the bulk density of the thermal spraying powder by the theoretical density of material forming the thermal spraying powder is preferably 0.15 or more. The particle size dispersion index of the thermal spraying powder is preferably 0.7 or less. A thermal spray coating that is dense and has a small surface roughness is reliably formed using the thermal spraying powder.Type: ApplicationFiled: December 19, 2005Publication date: June 22, 2006Inventors: Nobuaki Kato, Satoru Osawa, Tsuyoshi Itsukaichi
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Publication number: 20060116274Abstract: A thermal spraying powder contains granulated and sintered particles of an yttrium-aluminum double oxide formed by granulating and sintering raw-material particles. The crushing strength of the granulated and sintered particles is 15 MPa or more, and 10% particle size of the granulated and sintered particles is 6 ?m or more. The thermal spraying powder is suitable for use in forming a thermal spray coating through plasma spraying.Type: ApplicationFiled: November 30, 2005Publication date: June 1, 2006Inventors: Junya Kitamura, Hiroaki Mizuno, Tsuyoshi Itsukaichi
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Publication number: 20060081090Abstract: A thermal spraying powder contains a chromium-iron based alloy powder that includes carbon. The ratio of the mass of carbon in the alloy powder to the total mass of chromium and iron in the alloy powder is 2% or more. 10% particle size D10 of the alloy powder is preferably 10 ?m or more, and more preferably 15 ?m or more. 50% particle size D50 of the alloy powder is preferably 20 ?m or more. The thermal spraying powder is suitable for use in forming a thermal spray coating through high-velocity flame spraying.Type: ApplicationFiled: October 13, 2005Publication date: April 20, 2006Inventors: Junya Kitamura, Tsuyoshi Itsukaichi, Satoshi Tawada
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Publication number: 20060053967Abstract: A thermal spray powder includes cermet particles. Each cermet particle includes tungsten carbide particles having a mean primary particle size of 3 to 9 ?m and metal particles or ceramic particles containing chrome. The mean particle size of the cermet particles is preferably from 2 to 50 ?m and the compression strength of each cermet particle is preferably from 400 to 900 MPa. Such a thermal spray powder enables the formation of a thermal sprayed coating which has both excellent cavitation erosion resistance and slurry erosion resistance.Type: ApplicationFiled: December 22, 2004Publication date: March 16, 2006Inventors: Hiroaki Mizuno, Tsuyoshi Itsukaichi
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Patent number: 6984255Abstract: The present invention relates to a thermal spraying powder capable of reliably allowing the achievement of a thermal sprayed coating having superior characteristics. A thermal spraying powder according to a first embodiment of the invention includes a predetermined amount of each of molybdenum, boron, cobalt, and chromium. The total content of molybdenum, boron, cobalt, and chromium in the thermal spraying powder is no less than 95% by weight. The primary crystal phase of the thermal spraying powder is multi-element ceramics containing at least one of cobalt and chromium along with molybdenum and boron. A thermal spraying powder according to a second embodiment of the invention includes a predetermined amount of each of molybdenum, boron, nickel, and chromium. The total content of molybdenum, boron, nickel, and chromium in this thermal spraying powder is no less than 95% by weight.Type: GrantFiled: March 26, 2004Date of Patent: January 10, 2006Assignee: Fujimi IncorporatedInventors: Tsuyoshi Itsukaichi, Satoru Osawa
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Publication number: 20050000424Abstract: A thermal spraying method and thermal spraying system of the present invention jets thermal spraying powder supplied from a feeder through a connecting conduit by softening or melting the thermal spraying powder using a thermal spraying machine. By setting the internal atmosphere in the connecting conduit to a negative pressure relative to the atmosphere near the intake end of the connecting conduit, the thermal spraying powder stored in the feeder is suctioned into the intake end of the connecting conduit. The thermal spraying powder suctioned into the intake end of the connecting conduit is carried to the discharge end of the connecting conduit, introduced inside a cylindrical air flow jetted from the nozzle provided in the thermal spraying machine or introduced into a combustion chamber provided in the thermal spraying machine or into the jet nozzle, softened or melted and jetted out.Type: ApplicationFiled: October 15, 2002Publication date: January 6, 2005Inventors: Tsuyoshi Itsukaichi, Satoru Osawa
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Publication number: 20040202861Abstract: A thermal spray powder of the present invention includes particles composed of molybdenum disulfide, and a coating layer provided on the surface of each of the particles. The coating layer is composed of a metal that is softened or melted at a temperature lower than the heat decomposition temperature of the molybdenum disulfide. The coating layer is preferably composed of copper. The thermal spray powder suppresses heat decomposition of the molybdenum disulfide contained in the thermal spray powder during thermal spraying.Type: ApplicationFiled: September 29, 2003Publication date: October 14, 2004Inventors: Tsuyoshi Itsukaichi, Satoru Osawa, Isao Aoki
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Publication number: 20040194662Abstract: The present invention relates to a thermal spraying powder capable of reliably allowing the achievement of a thermal sprayed coating having superior characteristics. A thermal spraying powder according to a first embodiment of the invention includes a predetermined amount of each of molybdenum, boron, cobalt, and chromium. The total content of molybdenum, boron, cobalt, and chromium in the thermal spraying powder is no less than 95% by weight. The primary crystal phase of the thermal spraying powder is multi-element ceramics containing at least one of cobalt and chromium along with molybdenum and boron. A thermal spraying powder according to a second embodiment of the invention includes a predetermined amount of each of molybdenum, boron, nickel, and chromium. The total content of molybdenum, boron, nickel, and chromium in this thermal spraying powder is no less than 95% by weight.Type: ApplicationFiled: March 26, 2004Publication date: October 7, 2004Inventors: Tsuyoshi Itsukaichi, Satoru Osawa
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Publication number: 20040124256Abstract: A thermal spray gun of the present invention is capable of forming a good-quality ceramic spray coating. According to the machine, a flame generated in a combustion chamber of the machine is sent into a passage formed from the combustion chamber and through a discharge port that communicates with the combustion chamber, and then the flame is discharged from the discharge port to outside of the machine. A spray material is fed to the flame passing through the passage so that the spray material can be softened or melted by the flame and can be jetted out. An auxiliary fuel is fed to the flame passing through the passage to increase a temperature of the flame.Type: ApplicationFiled: October 9, 2003Publication date: July 1, 2004Inventors: Tsuyoshi Itsukaichi, Satoru Osawa, Tohru Morishita
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Patent number: 6641917Abstract: A spray powder to be used for forming a coating, which comprises from 80 to 97 wt %, based on the total weight, of a cermet powder and from 3 to 20 wt %, based on the total weight, of a metal powder, wherein the metal powder comprises Cr and Ni in a total amount of at least 90 wt %, based on the total weight of the metal powder, and the content of Cr is from 0 to 55 wt %, based on the total weight of the metal powder.Type: GrantFiled: January 23, 2002Date of Patent: November 4, 2003Assignee: Fujimi IncorporatedInventors: Tsuyoshi Itsukaichi, Satoru Osawa
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Patent number: 6482534Abstract: A spray powder which has a particle size of from 6 to 63 &mgr;m and which comprises from 75 to 95 wt % of a ceramic phase made of a WC powder and at least one chromium carbide powder selected from the group consisting of Cr3C2, Cr7C3 and Cr23C6, and from 5 to 25 wt % of a metal phase made of a Ni or Ni-based alloy powder, wherein the mean particle size of primary particles of the WC powder constituting the ceramic phase is from 5 to 20 &mgr;m, and the mean particle size of primary particles of the chromium carbide powder is from 1 to 10 &mgr;m.Type: GrantFiled: February 13, 2001Date of Patent: November 19, 2002Assignee: Fujimi IncorporatedInventors: Tsuyoshi Itsukaichi, Satoru Osawa
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Patent number: 6478832Abstract: A grinding stone using a metal material as the main material of a bonding material, which comprises: (A) abrasive grains of at least one member selected from the group consisting of diamond, cubic boron nitride, silicon carbide and aluminum oxide, (B) a bonding material made of at least one metal member selected from the group consisting of cobalt, nickel and copper, or a bonding material made of an alloy comprising at least one member selected from the group consisting of cobalt, nickel and copper, and at least one member selected from the group consisting of iron, silver, tin, zinc and tungsten, and (C) amorphous carbon as an adjuvant, wherein the abrasive grains (A) and the amorphous carbon (C) are distributed in the bonding material (B) in a sea-island structure.Type: GrantFiled: December 28, 2000Date of Patent: November 12, 2002Assignee: Fujimi IncorporatedInventors: Shiro Miura, Tsuyoshi Itsukaichi
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Publication number: 20020136894Abstract: A spray powder to be used for forming a coating, which comprises from 80 to 97 wt %, based on the total weight, of a cermet powder and from 3 to 20 wt %, based on the total weight, of a metal powder, wherein the metal powder comprises Cr and Ni in a total amount of at least 90 wt %, based on the total weight of the metal powder, and the content of Cr is from 0 to 55 wt %, based on the total weight of the metal powder.Type: ApplicationFiled: January 23, 2002Publication date: September 26, 2002Applicant: FUJIMI INCORPORATEDInventors: Tsuyoshi Itsukaichi, Satoru Osawa
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Publication number: 20010019742Abstract: A spray powder which has a particle size of from 6 to 63 &mgr;m and which comprises from 75 to 95 wt % of a ceramic phase made of a WC powder and at least one chromium carbide powder selected from the group consisting of Cr3C2, Cr7C3 and Cr23C6, and from 5 to 25 wt % of a metal phase made of a Ni or Ni-based alloy powder, wherein the mean particle size of primary particles of the WC powder constituting the ceramic phase is from 5 to 20 &mgr;m, and the mean particle size of primary particles of the chromium carbide powder is from 1 to 10 &mgr;m.Type: ApplicationFiled: February 13, 2001Publication date: September 6, 2001Applicant: FUJIMI INCORPORATEDInventors: Tsuyoshi Itsukaichi, Satoru Osawa
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Publication number: 20010005664Abstract: A grinding stone using a metal material as the main material of a bonding material, which comprises:Type: ApplicationFiled: December 28, 2000Publication date: June 28, 2001Applicant: FUJIMI INCORPORATEDInventors: Shiro Miura, Tsuyoshi Itsukaichi