Patents by Inventor Yuichi Tsumagari
Yuichi Tsumagari 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: 20010014293Abstract: In a compressor with a scroll compression mechanism having a stationary scroll and a movable scroll, a bearing through which the movable scroll is rotatably connected to a crank portion is disposed in a bearing box. The bearing box is provided for defining a back side room into which high-pressure refrigerant discharged from a discharge hole of an end plate of the movable scroll is introduced. The back side room is partitioned from the compression room by the end plate of the movable scroll to be opposite to the compression room, and a seal member which is disposed to air-tightly partition the back side room and a suction room of the compressor. Thus, a discharge pressure of refrigerant is applied from a back side of the movable scroll only at a position corresponding to the back side room. Accordingly, it is possible to reduce a compression thrust force without using a pressure adjustment valve.Type: ApplicationFiled: December 21, 2000Publication date: August 16, 2001Inventors: Yuichi Tsumagari, Yoshitaka Akiyama, Kazuhiro Kuroki, Hiroyuki Gennami
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Patent number: 6234768Abstract: Refrigerant passages in a compressor include an upper refrigerant passage and a lower refrigerant passage. The upper refrigerant passage is positioned above a datum line extending through a center of a rotor shaft of a compressor motor and perpendicularly to the rotor shaft, and the lower refrigerant passage is positioned below the datum line. A cross-sectional area of the upper refrigerant passage is larger than that of the lower refrigerant passage. Thus, even when lubricating-oil blocks the lower refrigerant passage, the refrigerant flows through the upper refrigerant passage, thereby reducing the pressure loss of the refrigerant, and preventing the lubricating oil from being caught in the refrigerant and discharged with the refrigerant from the compressor.Type: GrantFiled: November 26, 1999Date of Patent: May 22, 2001Assignee: Denso CorporationInventors: Yoshiaki Harakawa, Masami Sanuki, Yuichi Tsumagari, Kenji Iriyama
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Patent number: 6217297Abstract: An electric motor-driven compressor is positioned closer to the center of gravity of an engine than a compression mechanism, and is mounted in such a manner that an axial direction of an electric motor is parallel to a crank shaft of the engine. Therefore, a vibration force produced by the engine and applied to the electric motor is reduced.Type: GrantFiled: September 10, 1998Date of Patent: April 17, 2001Assignee: Denso CorporationInventors: Yuichi Tsumagari, Masami Sanuki, Toshihiko Muraki, Tetsuya Takechi
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Patent number: 6196817Abstract: A first lubricating oil passage and a second lubricating oil passage, extended from a contacting surface between a partition wall and a fixed scroll are formed in the partition wall (middle housing). A recess for communicating the first lubricating oil passage with the second lubricating oil passage is formed on the fixed scroll. Accordingly, the lubricating oil amount between the first lubricating oil passage and the second lubricating oil passage is easily controlled by adjusting the size of the recess.Type: GrantFiled: November 12, 1999Date of Patent: March 6, 2001Assignees: Denso Corporation, Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Yuichi Tsumagari, Masami Sanuki, Kazuhiro Kuroki, Hiroyuki Gennami
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Patent number: 6158980Abstract: Lubricant oil, separated from compressed fluid and stored in an oil storage chamber formed beneath a motor, is introduced via an internal oil supply passage to an attachment groove formed for installing a main bearing. The lubricant oil passes through the main bearing, and flows toward a compressor. The lubricant oil is also supplied to an oil supply hole formed inside a rotation shaft of the motor via lubricant oil grooves, and lubricates and cools a needle bearing. Accordingly, axial length of housing protruding portion is reduced, and thereby reducing an entire axial length of the electrically-driven compressor apparatus.Type: GrantFiled: June 4, 1999Date of Patent: December 12, 2000Assignees: Denso Corporation, Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Yuichi Tsumagari, Masami Sanuki, Hiroyuki Gennami, Kazuhiro Kuroki
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Patent number: 5920985Abstract: A movable scroll element for a scroll type compressor is produced by a combination of a mold casting process and a machining process. The mold casting process produces a cast product having an end-plate forming portion, a spiral-member-forming portion and a projecting portion for forming a drive power receiving portion. The cast product has an entire outer faces covered with black scale, and the machining process machines the end-plate-forming portion, a spiral member forming portion, the projecting portion by cutting. Nevertheless, at least an outer circumference of the drive power receiving portion, i.e., a boss portion of the movable scroll element is covered with an outermost layer consisting of black scale. Thus, a sufficient mechanical strength of the movable scroll element is obtained even if the wall thickness of the drive power receiving portion, i.e., the boss portion of the movable scroll element, is reduced.Type: GrantFiled: August 4, 1997Date of Patent: July 13, 1999Assignees: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Nippondenso Co., Ltd.Inventors: Tetsuhiko Fukanuma, Yasushi Watanabe, Shinya Yamamoto, Yuichi Tsumagari, Shigeki Iwanami
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Patent number: 5807089Abstract: A scroll type compressor having a housing unit in which a movable scroll element and a stationary scroll element are received in such a relationship that the movable scroll element orbits about the center of the stationary scroll element. The scroll type compressor further having a mechanical reinforced rotation preventing unit for preventing rotation of the movable scroll element about its own axis, and the rotation preventing unit having first stationary pin fixed to an inner end face of the housing unit and second movable pin fixed to an end face of a base plate of the movable scroll element, and a ring engaged with the first and second rings. A thickness T1 between the outer circumference of the first pin and the inner edge of the inner end face of the housing unit is set to be equal to or larger than 2.4 mm. A thickness T2 between the outer circumference of the second pin and the outer circumference of the base plate of the movable scroll element is set to be equal to or larger than 2.7 mm.Type: GrantFiled: June 7, 1996Date of Patent: September 15, 1998Assignees: Nippondenso Co., Ltd., Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Yuichi Tsumagari, Shigeki Iwanami, Shigeru Hisanaga, Yasuhiro Oki, Shinya Yamamoto, Tetsuya Yamaguchi, Shinsuke Aso, Tetsuo Yoshida, Masao Iguchi, Yasushi Watanabe, Izuru Shimizu
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Patent number: 5711659Abstract: A movable scroll element for a scroll type compressor is produced by a combination of a mold casting process and a machining process. The mold casting process produces a cast product having an end-plate forming portion, a spiral-member-forming portion and a projecting portion for forming a drive power receiving portion. The cast product has an entire outer faces covered with black scale, and the machining process machines the end-plate-forming portion, a spiral member forming portion, the projecting portion by cutting. Nevertheless, at least an outer circumference of the drive power receiving portion, i.e., a boss portion of the movable scroll element is covered with an outermost layer consisting of black scale. Thus, a sufficient mechanical strength of the movable scroll element is obtained even if the wall thickness of the drive power receiving portion, i.e., the boss portion of the movable scroll element, is reduced.Type: GrantFiled: July 10, 1996Date of Patent: January 27, 1998Assignees: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Nippondenso Co., Ltd.Inventors: Tetsuhiko Fukanuma, Yasushi Watanabe, Shinya Yamamoto, Yuichi Tsumagari, Shigeki Iwanami
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Patent number: 5641278Abstract: A scroll compressor, having a stationary scroll member, wherein machining of the scroll wall, as well as measurement of the length are easy, and an adjustment of an axial clearance is also easy. The contact surface between an outer wall 8 of the stationary scroll member 5 and a front housing 3 is located on a different plane as that of an end surface 7a of the scroll wall 7 of the stationary scroll member 5.Type: GrantFiled: May 11, 1995Date of Patent: June 24, 1997Assignees: Nippondenso Co., Ltd., Kabushiki Kaisha Tiyoda JidoshokkiInventors: Yuichi Tsumagari, Shinya Yamamoto, Tetsuhiko Fukanuma
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Patent number: 5634781Abstract: A scroll-type compressor comprising mutually mating stationary and movable scrolls for forming a compression chamber. The shell of the compressor comprises a center housing, a front housing, and a rear housing. The stationary scroll is integrally formed with the center housing. The movable scroll is carried by an eccentric shaft portion of a drive shaft which is rotatably supported by the front housing so that the movable scroll can move in an orbit. The rear housing has a first set of bolt holes, and the front housing has a first set of threaded holes for receiving a first set of through bolts which are inserted in the first set of bolt holes from the rear side whereby the center housing is fastened between the front and rear housings by the fastening force of the through bolts.Type: GrantFiled: April 30, 1996Date of Patent: June 3, 1997Assignees: Kabushiki Kaisha Toyoda Jigoshokki Seisakusho, Nippondenso Co., Ltd.Inventors: Tetsuo Yoshida, Tetsuhiko Fukanuma, Masao Iguchi, Yuichi Tsumagari, Yuuji Yamamoto
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Patent number: 5540571Abstract: A scroll-type compressor comprising mutually mating stationary and movable scrolls for forming a compression chamber. The shell of the compressor comprises a center housing, a front housing, and a rear housing. The stationary scroll is integrally formed with the center housing. The movable scroll is carried by an eccentric shaft portion of a drive shaft which is rotatably supported by the front housing so that the movable scroll can move in an orbit. The center housing has a first set of bolt holes, and the front housing has a first set of threaded holes, so that a first set of fastening bolts are inserted in the first set of bolt holes from the rear side and screwed into the first set of threaded holes. Also, the rear housing has a second set of bolt holes, and the center housing has a second set of threaded holes, so that a second set of fastening bolts are inserted in the second set of bolt holes from the rear side and screwed into the second set of threaded holes.Type: GrantFiled: November 9, 1994Date of Patent: July 30, 1996Assignees: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Nippondenso Co., Ltd.Inventors: Tetsuo Yoshida, Tetsuhiko Fukanuma, Masao Iguchi, Yuichi Tsumagari, Yuuji Yamamoto
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Patent number: 5531579Abstract: A scroll type compressor has a fixed scroll in a housing and a movable scroll opposed to the fixed scroll to define a compression chamber with the fixed scroll. Gas introduced into a suction chamber via an inlet is compressed in the compression chamber and then is discharged to a discharge chamber via a discharge port to exhaust the compressed gas from an outlet to the outside of the compressor in accordance with the circular movement of the movable scroll. A part of the discharge chamber is defined in the fixed scroll. An outlet flange protrudes from the fixed scroll. The outlet flange includes the outlet which communicates with the discharge chamber.Type: GrantFiled: January 23, 1995Date of Patent: July 2, 1996Assignees: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Nippondenso Co., Ltd.Inventors: Tetsuhiko Fukanuma, Kunifumi Goto, Yuichi Tsumagari, Shigeki Iwanami