Patents by Inventor Takayasu Saito
Takayasu Saito 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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Publication number: 20070140881Abstract: An object is to provide a high inner pressure type multistage compression rotary compressor capable of avoiding beforehand generation of vane fly of a second rotary compression element and realizing a stabilized operation, the rotary compressor includes a communication path which connects an intermediate pressure region to a region having a low pressure as a suction pressure of a first rotary compression element; and a valve device which opens or closes this communication path, the rotary compressor applies a high pressure as a back pressure of an upper vane, and this valve device opens the communication path in a case where a pressure difference between the intermediate pressure and the low pressure increases a predetermined upper limit value before the intermediate pressure reaches the high pressure.Type: ApplicationFiled: December 14, 2006Publication date: June 21, 2007Applicant: SANYO ELECTRIC CO., LTD.Inventors: Kenzo Matsumoto, Hiroyuki Matsumori, Takashi Sato, Takayasu Saito
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Patent number: 7174725Abstract: There is provided a rotary compressor capable of preventing deterioration of performance following plug fixing carried out to prevent falling-off of a spring member. The rotary compressor comprises a cylinder constituting a rotary compression element, a roller engaged with an eccentric portion formed in a rotary shaft of an electric element, and eccentrically rotated in the cylinder, a vane abutted on the roller to divide an inside of the cylinder into a low pressure chamber side and a high pressure chamber side, a spring member for always pressing the vane to the roller side, a housing portion of the spring member, formed in the cylinder, and opened to the vane side and a hermetically sealed container side, a plug positioned in the hermetically sealed container side of the spring member, and inserted into the housing portion to fit into a gap, and an O ring attached around the plug to seal a part between the plug and the housing portion.Type: GrantFiled: December 30, 2003Date of Patent: February 13, 2007Assignee: Sanyo Electric Co., Ltd.Inventors: Masaya Tadano, Haruhisa Yamasaki, Kenzo Matsumoto, Dai Matsuura, Kazuya Sato, Takayasu Saito, Toshiyuki Ebara, Satoshi Imai, Atsushi Oda, Takashi Sato, Hiroyuki Matsumori
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Patent number: 7168257Abstract: An object of the present invention is to provide a method for manufacturing a multi-stage compression type rotary compressor which can avoid the replacement of parts to be used as much as possible to reduce costs and also which enables easily setting an appropriate displacement volume ratio while preventing the compressor from being increased in size. The gist of the present invention is that an inner diameter of a lower cylinder is altered without altering its thickness (or height), and a displacement volume ratio between first and second rotary compression elements is set to an optimum value in accordance with the alteration.Type: GrantFiled: August 11, 2004Date of Patent: January 30, 2007Assignee: Sanyo, Electric Co., LtdInventors: Kenzo Matsumoto, Haruhisa Yamasaki, Masaya Tadano, Kazuya Sato, Dai Matsuura, Takayasu Saito, Noriyuki Tsuda
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Patent number: 7128540Abstract: There is provided a rotary compressor capable of preventing deterioration of performance following plug fixing carried out to prevent falling-off of a spring member. The rotary compressor comprises a cylinder constituting a rotary compression element, a roller engaged with an eccentric portion formed in a rotary shaft of an electric element, and eccentrically rotated in the cylinder, a vane abutted on the roller to divide an inside of the cylinder into a low pressure chamber side and a high pressure chamber side, a spring member for always pressing the vane to the roller side, a housing portion of the spring member, formed in the cylinder, and opened to the vane side and a hermetically sealed container side, a plug positioned in the hermetically sealed container side of the spring member, and inserted into the housing portion to form a gap, and an O ring attached around the plug to seal a part between the plug and the housing portion.Type: GrantFiled: August 22, 2002Date of Patent: October 31, 2006Assignee: Sanyo Electric Co., Ltd.Inventors: Masaya Tadano, Haruhisa Yamasaki, Kenzo Matsumoto, Dai Matsuura, Kazuya Sato, Takayasu Saito, Toshiyuki Ebara, Satoshi Imai, Atsushi Oda, Takashi Sato, Hiroyuki Matsumori
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Patent number: 7101161Abstract: An object of the present invention is to provide a method for manufacturing a multi-stage compression type rotary compressor which can avoid the replacement of parts to be used as much as possible to reduce costs and also which enables easily setting an appropriate displacement volume ratio while preventing the compressor from being increased in size. The gist of the present invention is that an inner diameter of a lower cylinder is altered without altering its thickness (or height), and a displacement volume ratio between first and second rotary compression elements is set to an optimum value in accordance with the alteration.Type: GrantFiled: August 11, 2004Date of Patent: September 5, 2006Assignee: Sanyo Electric Co., Ltd.Inventors: Kenzo Matsumoto, Haruhisa Yamasaki, Masaya Tadano, Kazuya Sato, Dai Matsuura, Takayasu Saito, Noriyuki Tsuda
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Publication number: 20060168994Abstract: There is provided a rotary compressor capable of preventing deterioration of performance following plug fixing carried out to prevent falling-off of a spring member. The rotary compressor comprises a cylinder constituting a rotary compression element, a roller engaged with an eccentric portion formed in a rotary shaft of an electric element, and eccentrically rotated in the cylinder, a vane abutted on the roller to divide an inside of the cylinder into a low pressure chamber side and a high pressure chamber side, a spring member for always pressing the vane to the roller side, a housing portion of the spring member, formed in the cylinder, and opened to the vane side and a hermetically sealed container side, a plug positioned in the hermetically sealed container side of the spring member, and inserted into the housing portion to fit into a gap, and an O ring attached around the plug to seal a part between the plug and the housing portion.Type: ApplicationFiled: March 17, 2006Publication date: August 3, 2006Applicant: SANYO ELECTRIC CO., LTD.Inventors: Masaya Tadano, Haruhisa Yamasaki, Kenzo Matsumoto, Dai Matsuura, Kazuya Sato, Takayasu Saito, Toshiyuki Ebara, Satoshi Imai, Atsushi Oda, Takashi Sato, Hiroyuki Matsumori
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Patent number: 7008199Abstract: An object of the present invention is to provide a method for manufacturing a multi-stage compression type rotary compressor which can avoid the replacement of parts to be used as much as possible to reduce costs and also which enables easily setting an appropriate displacement volume ratio while preventing the compressor from being increased in size. The gist of the present invention is that an inner diameter of a lower cylinder is altered without altering its thickness (or height), and a displacement volume ratio between first and second rotary compression elements is set to an optimum value in accordance with the alteration.Type: GrantFiled: August 11, 2004Date of Patent: March 7, 2006Assignee: Sanyo Electric Co., Ltd.Inventors: Kenzo Matsumoto, Haruhisa Yamasaki, Masaya Tadano, Kazuya Sato, Dai Matsuura, Takayasu Saito, Noriyuki Tsuda
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Patent number: 6974314Abstract: An object of the present invention is to provide a method for manufacturing a multi-stage compression type rotary compressor which can avoid the replacement of parts to be used as much as possible to reduce costs and also which enables easily setting an appropriate displacement volume ratio while preventing the compressor from being increased in size. The gist of the present invention is that an inner diameter of a lower cylinder is altered without altering its thickness (or height), and a displacement volume ratio between first and second rotary compression elements is set to an optimum value in accordance with the alteration.Type: GrantFiled: August 11, 2004Date of Patent: December 13, 2005Assignee: Sanyo Electric Co., Ltd.Inventors: Kenzo Matsumoto, Haruhisa Yamasaki, Masaya Tadano, Kazuya Sato, Dai Matsuura, Takayasu Saito, Noriyuki Tsuda
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Patent number: 6971849Abstract: A compressor for receiving at least one compression element in a sealed container is provided. The sealed container comprises a container body and a cover member for blocking an opening of the container body, both of which are made of an aluminum material. The cover member is electrically welded to the container body over an entire circumference of the cover member, and thick ribs with a thickness dimension extending from a circumference portion to a central portion are formed with a predetermined pitch on the cover member. In this manner, an increase in the manufacturing cost and a reduction of the workability can be substantially suppressed, while the reliability of the sealed container of the compressor and the aluminum members assembled by arc welding can be substantially improved.Type: GrantFiled: November 20, 2003Date of Patent: December 6, 2005Assignee: SANYO Electric Co., Ltd.Inventors: Takayasu Saito, Hiroyuki Matsumori, Dai Matsuura, Takashi Sato, Toshiyuki Ehara
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Patent number: 6892454Abstract: A method for manufacturing a multi-stage compression type rotary compressor which avoids the replacement of parts to be used as much as possible to reduce costs and also which enables easily setting an appropriate displacement volume ratio between first and second rotary compression elements without increasing the size of the compressor outer housing. This is done by altering the inner diameter of the cylinder of one of the rotary compression elements without altering the thickness (or height) of this cylinder to set a displacement volume ratio between the first and second rotary compression elements to an optimum value in accordance with the alteration.Type: GrantFiled: November 27, 2002Date of Patent: May 17, 2005Assignee: Sanyo Electric Co., Ltd.Inventors: Kenzo Matsumoto, Haruhisa Yamasaki, Masaya Tadano, Kazuya Sato, Dai Matsuura, Takayasu Saito, Noriyuki Tsuda
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Publication number: 20050074354Abstract: An object is to provide a compressor capable of surely preventing leakage of a refrigerant gas from a connection portion between an airtight container and a pipe to the outside at low costs. The compressor comprises an airtight container to which a refrigerant introduction pipe is connected, and a compression element received in the airtight container to discharge the refrigerant into the same. The refrigerant introduction pipe has a cylindrical pipe main body, and a jaw-like flange portion formed in a tip of the pipe main body. A cylindrical connection sleeve is disposed between the refrigerant introduction pipe and the airtight container. A first bolt is disposed to connect the connection sleeve to the airtight container, and a second bolt is disposed to connect the connection sleeve to the flange portion of the refrigerant introduction pipe. The flange portion of the refrigerant introduction pipe hides the first bolt.Type: ApplicationFiled: September 27, 2004Publication date: April 7, 2005Applicant: SANYO ELECTRIC CO., LTD.Inventors: Toshiyuki Ebara, Hiroyuki Matsumori, Takashi Sato, Dai Matsuura, Takayasu Saito
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Publication number: 20050069423Abstract: An object is to provide a rotary compressor capable of reducing an oil discharge amount to the outside, and there is provided a vertical rotary compressor constituted by housing an electromotive element and a rotary compression mechanism section driven by the electromotive element in an airtight container, wherein an oil separation mechanism for centrifugally separating oil in a refrigerant which has been compressed by the rotary compression mechanism section and discharged is disposed in a space between the airtight container and the rotary compression mechanism section in the airtight container.Type: ApplicationFiled: September 22, 2004Publication date: March 31, 2005Applicant: SANYO ELECTRIC CO., LTD.Inventors: Toshiyuki Ebara, Hiroyuki Matsumori, Takashi Sato, Dai Matsuura, Takayasu Saito
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Publication number: 20050069445Abstract: An object is to execute sure oil supplying to a second rotary compression element in a horizontal type compressor equipped with the second rotary compression element in which pressure becomes higher than that in an airtight container. A horizontal type rotary compressor of a multistage compression system comprises a driving element and a compression mechanism section driven by the driving element in a horizontal type airtight container. The compression mechanism section is constituted of first and second rotary compression elements. A refrigerant compressed by the first rotary compression element is discharged into the airtight container, and the discharged refrigerant of intermediate pressure is further compressed by the second rotary compression element to be discharged. A gist is that an oil supply passage is formed in a cylinder of the second rotary compression element 34 to communicate a low-pressure chamber of the cylinder with a bottom part in the airtight container.Type: ApplicationFiled: June 23, 2004Publication date: March 31, 2005Applicant: SANYO ELECTRIC CO., LTD.Inventors: Toshiyuki Ebara, Hiroyuki Matsumori, Takashi Sato, Dai Matsuura, Takayasu Saito
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Publication number: 20050013718Abstract: An object of the present invention is to provide a method for manufacturing a multi-stage compression type rotary compressor which can avoid the replacement of parts to be used as much as possible to reduce costs and also which enables easily setting an appropriate displacement volume ratio while preventing the compressor from being increased in size. The gist of the present invention is that an inner diameter of a lower cylinder is altered without altering its thickness (or height), and a displacement volume ratio between first and second rotary compression elements is set to an optimum value in accordance with the alteration.Type: ApplicationFiled: August 11, 2004Publication date: January 20, 2005Applicant: Sanyo Electric Co., Ltd.Inventors: Kenzo Matsumoto, Haruhisa Yamasaki, Masaya Tadano, Kazuya Sato, Dai Matsuura, Takayasu Saito, Noriyuki Tsuda
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Publication number: 20050008520Abstract: An object of the present invention is to provide a method for manufacturing a multi-stage compression type rotary compressor which can avoid the replacement of parts to be used as much as possible to reduce costs and also which enables easily setting an appropriate displacement volume ratio while preventing the compressor from being increased in size. The gist of the present invention is that an inner diameter of a lower cylinder is altered without altering its thickness (or height), and a displacement volume ratio between first and second rotary compression elements is set to an optimum value in accordance with the alteration.Type: ApplicationFiled: August 11, 2004Publication date: January 13, 2005Applicant: Sanyo Electric Co., Ltd.Inventors: Kenzo Matsumoto, Haruhisa Yamasaki, Masaya Tadano, Kazuya Sato, Dai Matsuura, Takayasu Saito, Noriyuki Tsuda
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Publication number: 20050008442Abstract: An object of the present invention is to provide a method for manufacturing a multi-stage compression type rotary compressor which can avoid the replacement of parts to be used as much as possible to reduce costs and also which enables easily setting an appropriate displacement volume ratio while preventing the compressor from being increased in size. The gist of the present invention is that an inner diameter of a lower cylinder is altered without altering its thickness (or height), and a displacement volume ratio between first and second rotary compression elements is set to an optimum value in accordance with the alteration.Type: ApplicationFiled: August 11, 2004Publication date: January 13, 2005Applicant: Sanyo Electric Co., Ltd.Inventors: Kenzo Matsumoto, Haruhisa Yamasaki, Masaya Tadano, Kazuya Sato, Dai Matsuura, Takayasu Saito, Noriyuki Tsuda
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Publication number: 20050008518Abstract: An object of the present invention is to provide a method for manufacturing a multi-stage compression type rotary compressor which can avoid the replacement of parts to be used as much as possible to reduce costs and also which enables easily setting an appropriate displacement volume ratio while preventing the compressor from being increased in size. The gist of the present invention is that an inner diameter of a lower cylinder is altered without altering its thickness (or height), and a displacement volume ratio between first and second rotary compression elements is set to an optimum value in accordance with the alteration.Type: ApplicationFiled: August 11, 2004Publication date: January 13, 2005Applicant: Sanyo Electric Co., Ltd.Inventors: Kenzo Matsumoto, Haruhisa Yamasaki, Masaya Tadano, Kazuya Sato, Dai Matsuura, Takayasu Saito, Noriyuki Tsuda
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Publication number: 20040165999Abstract: There is provided a rotary compressor capable of preventing deterioration of performance following plug fixing carried out to prevent falling-off of a spring member. The rotary compressor comprises a cylinder constituting a rotary compression element, a roller engaged with an eccentric portion formed in a rotary shaft of an electric element, and eccentrically rotated in the cylinder, a vane abutted on the roller to divide an inside of the cylinder into a low pressure chamber side and a high pressure chamber side, a spring member for always pressing the vane to the roller side, a housing portion of the spring member, formed in the cylinder, and opened to the vane side and a hermetically sealed container side, a plug positioned in the hermetically sealed container side of the spring member, and inserted into the housing portion to fit into a gap, and an O ring attached around the plug to seal a part between the plug and the housing portion.Type: ApplicationFiled: March 2, 2004Publication date: August 26, 2004Applicant: SANYO ELECTRIC CO., LTDInventors: Masaya Tadano, Haruhisa Yamasaki, Kenzo Matsumoto, Dai Matsuura, Kazuya Sato, Takayasu Saito, Toshiyuki Ebara, Satoshi Imai, Atsushi Oda, Takashi Sato, Hiroyuki Matsumori
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Publication number: 20040165998Abstract: There is provided a rotary compressor capable of preventing deterioration of performance following plug fixing carried out to prevent falling-off of a spring member. The rotary compressor comprises a cylinder constituting a rotary compression element, a roller engaged with an eccentric portion formed in a rotary shaft of an electric element, and eccentrically rotated in the cylinder, a vane abutted on the roller to divide an inside of the cylinder into a low pressure chamber side and a high pressure chamber side, a spring member for always pressing the vane to the roller side, a housing portion of the spring member, formed in the cylinder, and opened to the vane side and a hermetically sealed container side, a plug positioned in the hermetically sealed container side of the spring member, and inserted into the housing portion to fit into a gap, and an O ring attached around the plug to seal a part between the plug and the housing portion.Type: ApplicationFiled: March 2, 2004Publication date: August 26, 2004Applicant: SANYO ELECTRIC CO., LTD.Inventors: Masaya Tadano, Haruhisa Yamasaki, Kenzo Matsumoto, Dai Matsuura, Kazuya Sato, Takayasu Saito, Toshiyuki Ebara, Satoshi Imai, Atsushi Oda, Takashi Sato, Hiroyuki Matsumori
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Publication number: 20040154329Abstract: There is provided a rotary compressor capable of preventing deterioration of performance following plug fixing carried out to prevent falling-off of a spring member. The rotary compressor comprises a cylinder constituting a rotary compression element, a roller engaged with an eccentric portion formed in a rotary shaft of an electric element, and eccentrically rotated in the cylinder, a vane abutted on the roller to divide an inside of the cylinder into a low pressure chamber side and a high pressure chamber side, a spring member for always pressing the vane to the roller side, a housing portion of the spring member, formed in the cylinder, and opened to the vane side and a hermetically sealed container side, a plug positioned in the hermetically sealed container side of the spring member, and inserted into the housing portion to fit into a gap, and an O ring attached around the plug to seal a part between the plug and the housing portion.Type: ApplicationFiled: December 30, 2003Publication date: August 12, 2004Applicant: SANYO ELECTRIC CO., LTD.Inventors: Masaya Tadano, Haruhisa Yamasaki, Kenzo Matsumoto, Dai Matsuura, Kazuya Sato, Takayasu Saito, Toshiyuki Ebara, Satoshi Imai, Atsushi Oda, Takashi Sato, Hiroyuki Matsumori