Patents by Inventor Hitoshi Uehara

Hitoshi Uehara 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).

  • Patent number: 10311984
    Abstract: The shaft sealing structure includes a seal ring that has abutment portions formed by dividing the seal ring along the axial direction and that is provided around a main shaft in a ring-like manner; a support member that is provided in the seal ring along the circumferential direction of the main shaft; and a thermoswitch that is connected to the support member between the abutment portions and that presses the support member toward the center of the main shaft when the temperature rises to a temperature higher than that during normal operation, in which the seal ring is fixed at a position separated from the main shaft during the normal operation and is moved by the support member toward the center of the main shaft when the temperature rises to a temperature higher than that during the normal operation.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: June 4, 2019
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Kentarou Saeki, Hidekazu Uehara, Akihiko Umeda, Masaru Sakai, Hiroshi Kuzumi, Yasuhiro Ikeda, Toshihiko Matsuo, Takanobu Otani, Hiroomi Sakuma, Hitoshi Ito, Yasushi Takayama, Tomoki Hanada, Yuji Harada
  • Patent number: 8158716
    Abstract: A hydrolyzable group-containing organohydrogenpolysiloxane is prepared by (A) reacting (a) an organosiloxane with (b) an organosilane or organosiloxane containing a hydrolyzable group, at least one of components (a) and (b) containing hydrosilyl, in the presence of a superstrong acid catalyst, (B) adding an inorganic basic neutralizing agent and/or an adsorbent to the resulting reaction solution, and (C) removing the neutralized and/or adsorbed form of the superstrong acid catalyst. The process proceeds in an essentially non-aqueous system, and the organohydrogenpolysiloxane free of residual acidic catalyst is obtainable at low cost.
    Type: Grant
    Filed: July 16, 2009
    Date of Patent: April 17, 2012
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Masahiro Amemiya, Hitoshi Uehara, Muneo Kudo, Mitsuo Asai
  • Publication number: 20100022705
    Abstract: A hydrolyzable group-containing organohydrogenpolysiloxane is prepared by (A) reacting (a) an organosiloxane with (b) an organosilane or organosiloxane containing a hydrolyzable group, at least one of components (a) and (b) containing hydrosilyl, in the presence of a superstrong acid catalyst, (B) adding an inorganic basic neutralizing agent and/or an adsorbent to the resulting reaction solution, and (C) removing the neutralized and/or adsorbed form of the superstrong acid catalyst. The process proceeds in an essentially non-aqueous system, and the organohydrogenpolysiloxane free of residual acidic catalyst is obtainable at low cost.
    Type: Application
    Filed: July 16, 2009
    Publication date: January 28, 2010
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Masahiro Amemiya, Hitoshi Uehara, Muneo Kudo, Mitsuo Asai
  • Publication number: 20040214015
    Abstract: A hydrosilyl radical-bearing organosilicon compound is applied to a substrate which has been coated with an aliphatic unsaturated hydrocarbon radical-bearing material, whereupon reaction takes place between the coating of aliphatic unsaturated hydrocarbon radical-bearing material and the hydrosilyl radical-bearing organosilicon compound. A fully durable functional coating is formed on the substrate surface. The method can modify surfaces of plastics, metals, ceramics, pottery and glass substrates for imparting functions such as water repellent, hydrophilic, anti-staining or electroconductive properties thereto.
    Type: Application
    Filed: April 27, 2004
    Publication date: October 28, 2004
    Inventors: Mitsuo Asai, Hitoshi Uehara, Masaki Tanaka, Kazutaka Kamitani
  • Patent number: 6780514
    Abstract: An optical communication device substrate made of ceramic or glass-ceramic having a negative thermal expansion coefficient in the range of −10 to −120×10−7/° C. in a temperature range of −40 to 100° C., treated with a solution containing at least one organic silicon compound selected from the group consisting of siloxane compounds and silazane compounds.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: August 24, 2004
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventors: Satoru Yoshihara, Takahiro Matano, Akihiko Sakamoto, Mitsuo Asai, Hitoshi Uehara
  • Patent number: 6652640
    Abstract: A surface treating agent is comprised of the reaction product obtained by reacting with ammonia a mixture of (A) an organosilicon compound having a fluorinated organic group and (B) an organosilicon compound having a hydrolyzable group. Substrates treated therewith exhibit high water and oil repellency and allow sticking contaminants to be effectively wiped off.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: November 25, 2003
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Mitsuo Asai, Hitoshi Uehara
  • Publication number: 20030103754
    Abstract: An optical communication device substrate made of ceramic or glass-ceramic having a negative thermal expansion coefficient in the range of −10 to −120×10−7/° C. in a temperature range of −40 to 100° C., treated with a solution containing at least one organic silicon compound selected from the group consisting of siloxane compounds and silazane compounds.
    Type: Application
    Filed: August 7, 2002
    Publication date: June 5, 2003
    Applicant: Nippon Electric Glass Co., Ltd.
    Inventors: Satoru Yoshihara, Takahiro Matano, Akihiko Sakamoto, Mitsuo Asai, Hitoshi Uehara
  • Publication number: 20020020326
    Abstract: A surface treating agent is comprised of the reaction product obtained by reacting with ammonia a mixture of (A) an organosilicon compound having a fluorinated organic group and (B) an organosilicon compound having a hydrolyzable group. Substrates treated therewith exhibit high water and oil repellency and allow sticking contaminants to be effectively wiped off.
    Type: Application
    Filed: June 29, 2001
    Publication date: February 21, 2002
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Mitsuo Asai, Hitoshi Uehara
  • Patent number: 6140451
    Abstract: A composition comprising a trifunctional polysilazane and a polysiloxane having at least one hydrolyzable group and an optional fluoroalkyl group is effective for treating substrates to render their surface water repellent, oil repellent, and anti-fouling.
    Type: Grant
    Filed: October 16, 1998
    Date of Patent: October 31, 2000
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Mitsuo Asai, Hitoshi Uehara
  • Patent number: 5599893
    Abstract: A hydrolyzate resulting from co-hydrolysis of a perfluoroalkyl group-containing organic silicon compound and a hydrolyzable group-containing methylpolysiloxane compound in a hydrophilic solvent is blended with an organopolysiloxane and a strong acid to constitute a water repellent composition which is effective for imparting water repellency and facilitating falling of water droplets and thus imparting excellent water repellency and stain-proofness to a surface of an article treated therewith.
    Type: Grant
    Filed: August 11, 1995
    Date of Patent: February 4, 1997
    Assignee: Shin-Etsu Co., Ltd.
    Inventors: Mitsuo Asai, Hitoshi Uehara, Ichiro Ono, Hiroaki Kobayashi, Jun Kawaguchi, Satoshi Shiiki, Kazuishi Mitani
  • Patent number: 5489328
    Abstract: A hydrolyzate resulting from co-hydrolysis of a perfluoroalkyl group-containing organic silicon compound and a hydrolyzable group-containing methylpolysiloxane compound in a hydrophilic solvent and water constitutes a water repellent agent which is effective for imparting water repellency and facilitating falling of water droplets and thus imparting excellent water repellency and stain-proofness to a surface of an article treated therewith.
    Type: Grant
    Filed: January 30, 1995
    Date of Patent: February 6, 1996
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Ichiro Ono, Hitoshi Uehara, Shoji Ichinohe
  • Patent number: 5049617
    Abstract: Organopolysiloxane compounds represented by the following general formula (I), which can fully achieve their effects as functional group when introduced as cross-linking groups into moisture cross-linkable polymers: ##STR1## (wherein R' represents methyl group or hydrogen atom; R.sup.2 represents methyl group or ethyl group; m represents an integer from 1 to 3; n represents an integer from 3 to 50; k represents 1 or 2 and l represents 2 or 3).
    Type: Grant
    Filed: September 26, 1989
    Date of Patent: September 17, 1991
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Hiroshi Yoshioka, Ichiro Ono, Hitoshi Uehara
  • Patent number: 4753976
    Abstract: The rubber composition without formulating a carbon black filler has a remarkably low Mooney viscosity and still is capable of giving a rubber vulcanizate having excellent mechanical properties. The rubber composition comprises, in addition to natural rubber or a diene-based synthetic rubber and a non-carbon inorganic filler, a specific poly(dialkoxysiloxane) terminated at each molecular chain end with a polysulfide linkage-containing group of the formula (RO).sub.3 Si--R.sup.1 --S.sub.x -- R.sup.1 --bonded to the terminal silicon atom, in which R is an alkyl group, e.g. methyl and ethyl, R.sup.1 is a divalent hydrocarbon group, e.g. --CH.sub.2 CH.sub.2 CH.sub.2 13 , and x is a positive integer of 2 to 6 or, typically, 4.
    Type: Grant
    Filed: August 22, 1986
    Date of Patent: June 28, 1988
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Hiroshi Yoshioka, Ichiro Ono, Hitoshi Uehara
  • Patent number: 4709065
    Abstract: The novel organosilicon compound of the invention has two polysulfide linkages in a molecule and is represented by the general formula(R.sup.1 O).sub.3 Si--R.sup.2 --S.sub.x --R.sup.3 --S.sub.x --R.sup.2 --Si(OR.sup.1).sub.3,in which R.sup.1 is an alkyl group having from 1 to 4 carbon atoms, R.sup.2 is a divalent hydrocarbon group having from 1 to 10 carbon atoms, R.sup.3 is a divalent hydrocarbon group having from 2 to 10 carbon atoms or a divalent hydrocarbon group additionally containing one or more of the linking units of the formula --O-- or --CO--O-- in the structure and X is a positive integer of from 2 to 6. The compound is useful as an additive in a rubber composition based on natural rubber or a diene-based synthetic rubber and a non-carbon inorganic filler to greatly improve the mechanical properties of the vulcanizate without increasing the Mooney viscosity of the unvulcanized rubber composition.
    Type: Grant
    Filed: September 19, 1986
    Date of Patent: November 24, 1987
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Hiroshi Yoshioka, Ichiro Ono, Hitoshi Uehara