Patents by Inventor Tomohiro Wakita
Tomohiro Wakita 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: 11744792Abstract: A solid soap containing, (A) 77 to 91 mass % of an alkali metal salt of a saturated fatty acid having an even number of carbon atoms from 12 to 18, (B) 0.005 to 1 mass % of an alkali metal salt of a saturated fatty acid having an odd number of carbon atoms from 13 to 17, (C) 0.5 to 5 mass % of glycerol, and (D) 5 to 18 mass % of water.Type: GrantFiled: January 16, 2020Date of Patent: September 5, 2023Assignee: NOF CORPORATIONInventors: Dai Murakami, Tomohiro Wakita
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Publication number: 20220110857Abstract: A solid soap containing, (A) 77 to 91 mass % of an alkali metal salt of a saturated fatty acid having an even number of carbon atoms from 12 to 18, (B) 0.005 to 1 mass % of an alkali metal salt of a saturated fatty acid having an odd number of carbon atoms from 13 to 17, (C) 0.5 to 5 mass % of glycerol, and (D) 5 to 18 mass % of water.Type: ApplicationFiled: January 16, 2020Publication date: April 14, 2022Inventors: Dai Murakami, Tomohiro Wakita
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Patent number: 8117959Abstract: A swash plate includes a boss, which is mounted on the drive shaft, and a plate portion, which extends from the boss to be inclined with respect to the drive shaft. A rotary valve includes a suction passage, which sequentially connects cylinder bores in a suction stroke via an associated guide passage. An introduction guide communicates with the shaft bore to introduce the refrigerant gas in the swash plate chamber to the rotary valve. The introduction guide faces the boss and extends in the radial direction from the shaft bore beyond the boss. Therefore, suction efficiency of refrigerant gas from the swash plate chamber to the cylinder bore has improved.Type: GrantFiled: March 30, 2007Date of Patent: February 21, 2012Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Tomohiro Wakita, Mitsuyo Ishikawa, Jun Kondo, Takeshi Aoki, Shinichi Sato, Shinsuke Asou, Masashi Oda, Kazushige Murao
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Patent number: 7841840Abstract: A mechanism for drawing in refrigerant to front compression chambers (28a) of a double-headed piston type compressor differs from a mechanism for drawing in refrigerant to rear compression chambers (29a). More specifically, the mechanism for drawing in refrigerant to the front compression chambers (28a) include suction valves (18a) configured by flap valves. The mechanism for drawing in refrigerant to the rear compression chambers (29a) is configured by a rotary valve (35). Thus, pulsation of the compressor is reduced, so that the generation of noise is suppressed. As a result, a quiet compressor is achieved.Type: GrantFiled: October 17, 2006Date of Patent: November 30, 2010Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Shinichi Sato, Masahiro Kawaguchi, Jun Kondo, Takeshi Aoki, Tomohiro Wakita, Mitsuyo Ishikawa, Akio Saiki
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Publication number: 20090238697Abstract: A mechanism for drawing in refrigerant to front compression chambers (28a) of a double-headed piston type compressor differs from a mechanism for drawing in refrigerant to rear compression chambers (29a). More specifically, the mechanism for drawing in refrigerant to the front compression chambers (28a) include suction valves (18a) configured by flap valves. The mechanism for drawing in refrigerant to the rear compression chambers (29a) is configured by a rotary valve (35). Thus, pulsation of the compressor is reduced, so that the generation of noise is suppressed. As a result, a quiet compressor is achieved.Type: ApplicationFiled: October 17, 2006Publication date: September 24, 2009Inventors: Shinichi Sato, Masahiro Kawaguchi, Jun Kondo, Takeshi Aoki, Tomohiro Wakita, Mitsuyo Ishikawa, Akio Saiki
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Publication number: 20070292279Abstract: A swash plate includes a boss, which is mounted on the drive shaft, and a plate portion, which extends from the boss to be inclined with respect to the drive shaft. A rotary valve includes a suction passage, which sequentially connects cylinder bores in a suction stroke via an associated guide passage. An introduction guide communicates with the shaft bore to introduce the refrigerant gas in the swash plate chamber to the rotary valve. The introduction guide faces the boss and extends in the radial direction from the shaft bore beyond the boss. Therefore, suction efficiency of refrigerant gas from the swash plate chamber to the cylinder bore has improved.Type: ApplicationFiled: March 30, 2007Publication date: December 20, 2007Applicant: Kabushiki Kaisha Toyota JidoshokkiInventors: Tomohiro Wakita, Mitsuyo Ishikawa, Jun Kondo, Takeshi Aoki, Shinichi Sato, Shinsuke Asou, Masashi Oda, Kazushige Murao
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Patent number: 6923626Abstract: A variable displacement compressor has a housing, a drive shaft, a rotor, a swash plate, a piston and a decelerating mechanism. The housing includes a cylinder bore and supports the drive shaft. The rotor is secured to the drive shaft. The swash plate is operatively connected to the rotor and the drive shaft so as to rotate therewith and varies its inclination angle relative to the drive shaft. The piston is connected to the swash plate so as to reciprocate in the cylinder bore with rotation of the swash plate. A stroke of the piston varies in accordance with the inclination angle of the swash plate. The deceleration mechanism between the rotor and the swash plate decelerates the inclination speed of the swash plate in a range from a near maximum inclination angle to the maximum inclination angle when the swash plate inclines to increase the stroke of the piston.Type: GrantFiled: August 1, 2002Date of Patent: August 2, 2005Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Masaki Ota, Tomohiro Wakita, Tomoji Tarutani, Hirotaka Kurakake, Yoshinobu Ishigaki, Kazuhiro Nomura, Yoshinori Inoue, Satoshi Umemura, Kazuhiko Minami
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Publication number: 20050058551Abstract: A variable displacement compressor includes a swash plate guiding member that rotates integrally with and inclines relative to a drive shaft, a swash plate supported by the guiding member, and a piston engaged with the swash plate via a shoe. A clutch is located between the guiding member and the swash plate. The clutch is switched between an engaged state, where the clutch permits the guiding member and the swash plate to rotate integrally, and a disengaged state, where the clutch permits the guiding member and the swash plate to rotate relative to each other. Therefore, the compressor is capable of switching between a state where improving the displacement controllability is prioritized and a state where reduction of mechanical loss between the swash plate and the shoes is prioritized.Type: ApplicationFiled: September 3, 2004Publication date: March 17, 2005Inventors: Tomohiro Wakita, Osamu Nakayama, Kiyohiko Sakakibara, Hiroaki Kayukawa, Tetsuhiko Fukanuma, Yoshio Taneda, Tsuyoshi Yamaguchi
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Patent number: 6629823Abstract: Compressor are taught that may include a suction port to draw refrigerant and a discharge port to discharge compressed refrigerant. A driving shaft is disposed within a compressor driving chamber. A swash plate is inclinably and slidably coupled to the driving shaft. The swash plate rotates together with the driving shaft at an inclination angle with respect to a plane perpendicular to the rotational axis of the driving shaft. A cylinder bore is disposed adjacent to the compressor driving chamber. A piston is disposed within the cylinder bore and an end portion of the piston is connected to a peripheral edge of the swash plate by a shoe. Preferably, the piston reciprocates within the cylinder bore to compress the refrigerant in response to rotation of the inclined swash plate. A rotor is connected to the driving shaft. A hinge mechanism connects the swash plate with the rotor and transmits torque from the driving shaft to the swash plate regardless of the inclination angle of the swash plate.Type: GrantFiled: April 17, 2001Date of Patent: October 7, 2003Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Masaki Ota, Tomoji Tarutani, Tomohiro Wakita, Kenta Nishimura, Yoshinori Inoue, Masafumi Ito
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Publication number: 20030026708Abstract: A variable displacement compressor has a housing, a drive shaft, a rotor, a swash plate, a piston and a decelerating mechanism. The housing includes a cylinder bore and supports the drive shaft. The rotor is secured to the drive shaft. The swash plate is operatively connected to the rotor and the drive shaft so as to rotate therewith and varies its inclination angle relative to the drive shaft. The piston is connected to the swash plate so as to reciprocate in the cylinder bore with rotation of the swash plate. A stroke of the piston varies in accordance with the inclination angle of the swash plate. The decelerating mechanism between the rotor and the swash plate decelerates the inclination speed of the swash plate in a range from a close maximum inclination angle to the maximum inclination angle when the swash plate inclines to increase the stroke of the piston.Type: ApplicationFiled: August 1, 2002Publication date: February 6, 2003Inventors: Masaki Ota, Tomohiro Wakita, Tomoji Tarutani, Hirotaka Kurakake, Yoshinobu Ishigaki, Kazuhiro Nomura, Yoshinori Inoue, Satoshi Umemura, Kazuhiko Minami
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Patent number: 6511296Abstract: A lug plate 11 is secured to a drive shaft 7 which is rotatably supported in a housing so as to rotate together with the drive shaft, and a swash plate 12 is operatively connected to the lug plate through a hinge mechanism so as to rotate together with the lug plate and so as to vary an angle with respect to the drive shaft 7. Pistons 17 which are received in cylinder bores la so as to reciprocally move are operatively connected to the swash plate 12, so that not only can a refrigerant be introduced and discharged in accordance with the rotation of the drive shaft 7, but also the stroke of the pistons 17 can be varied by varying the angle of the swash plate 12. A front radial bearing 9B is provided on the outer periphery of a boss portion 11A of the lug plate 11 and a coil spring 16 to bias the swash plate 12 is received in a spring receiving portion 11C formed in the lug plate 11 on the rear side thereof.Type: GrantFiled: April 12, 2001Date of Patent: January 28, 2003Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Masaki Ota, Tomoji Tarutani, Ken Suitou, Tomohiro Wakita, Yoshinori Inoue, Hirotaka Kurakake
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Patent number: 6499975Abstract: A variable displacement compressor 10 includes a wall 1a that seals a cylinder bore 14, and is integrally formed with a cylinder block 1. A rear plate 5 having a plate-like shape is fastened via a gasket 6 to a location that extends to the inner rear side of a wall 1a. Suction valves 40 and discharge valves 44 are disposed within the wall 1a.Type: GrantFiled: April 10, 2001Date of Patent: December 31, 2002Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Masaki Ota, Tomoji Tarutani, Tomohiro Wakita, Taku Adaniya, Ryo Matsubara, Yoshikazu Fukutani
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Publication number: 20020170425Abstract: A method of producing a shoe for a swash plate type compressor, said shoe being disposed between a swash plate and a piston of said swash plate type compressor, the method comprising: a forming step of forming a steel blank into a shoe product including an end product shoe and a pre size-adjusted shoe; and a nitriding step of effecting a nitriding treatment on said shoe product; and wherein a quenching treatment is not effected after said forming step.Type: ApplicationFiled: May 20, 2002Publication date: November 21, 2002Inventors: Tomoji Tarutani, Tomohiro Wakita, Hirotaka Kurakake, Hidenori Iida, Naoki Usui, Masaki Ota, Osamu Hiramatsu, Kiyoshi Narukawa, Yoshinori Inoue
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Patent number: 6454545Abstract: In the present compressor, a retainer is prevented from being deformed without impairing the sealing performance of a metal gasket provided between a covering member for closing a compression chamber of a cylinder block assembly and a discharge valve forming plate. A discharge valve forming plate is provided between a valve plate having at least one discharge port through which a fluid compressed in a compression chamber of a cylinder block assembly is discharged into a discharge chamber of a housing and the cylinder block assembly. A retainer for restricting the magnitude of opening of a discharge valve is integrally formed in a metal gasket which is provided between the discharge valve forming plate and the housing. The housing is provided with a restricting section at a position corresponding to a proximal portion of a rising portion of the retainer for restricting the proximal portion of the top surface of a rising portion.Type: GrantFiled: November 18, 1997Date of Patent: September 24, 2002Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Hayato Ikeda, Noriyuki Shintoku, Tomohiro Wakita, Keishi Nakagaki
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Patent number: 6364629Abstract: A valve structure includes a central valve plate having a valve hole, and a flexible valve element having a root portion lying on the central valve plate and a bendable portion to open and close the valve hole. A retainer element has a retaining surface to restrict deformation of the valve element when it is bent toward the retainer element to open the valve hole. The profile is expressed in a two-dimensional coordinate system (x, y), and the freely bent shape is represented by coordinates (x, f(x)) obtained by pushing the valve element at an abscissa position corresponding to the center of the valve element. The retaining surface has a profile containing a coordinate (x′, f(x′)−K) so that the profile is displaced toward the central valve plate with respect to a freely bent shape of the valve element.Type: GrantFiled: March 28, 2000Date of Patent: April 2, 2002Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Noriyuki Shintoku, Tomohiro Wakita, Hirofumi Sato, Mitsuyo Ishikawa
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Publication number: 20010033798Abstract: A lug plate 11 is secured to a drive shaft 7 which is rotatably supported in a housing so as to rotate together with the drive shaft, and a swash plate 12 is operatively connected to the lug plate through a hinge mechanism so as to rotate together with the lug plate and so as to vary an angle with respect to the drive shaft 7. Pistons 17 which are received in cylinder bores la so as to reciprocally move are operatively connected to the swash plate 12, so that not only can a refrigerant be introduced and discharged in accordance with the rotation of the drive shaft 7, but also the stroke of the pistons 17 can be varied by varying the angle of the swash plate 12. A front radial bearing 9B is provided on the outer periphery of a boss portion 11A of the lug plate 11 and a coil spring 16 to bias the swash plate 12 is received in a spring receiving portion 11C formed in the lug plate 11 on the rear side thereof.Type: ApplicationFiled: April 12, 2001Publication date: October 25, 2001Inventors: Masaki Ota, Tomoji Tarutani, Ken Suitou, Tomohiro Wakita, Yoshinori Inoue, Hirotaka Kurakake
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Publication number: 20010031205Abstract: Compressor are taught that may include a suction port to draw refrigerant and a discharge port to discharge compressed refrigerant. A driving shaft is disposed within a compressor driving chamber. A swash plate is inclinably and slidably coupled to the driving shaft. The swash plate rotates together with the driving shaft at an inclination angle with respect to a plane perpendicular to the rotational axis of the driving shaft. A cylinder bore is disposed adjacent to the compressor driving chamber. A piston is disposed within the cylinder bore and an end portion of the piston is connected to a peripheral edge of the swash plate by a shoe. Preferably, the piston reciprocates within the cylinder bore to compress the refrigerant in response to rotation of the inclined swash plate. A rotor is connected to the driving shaft. A hinge mechanism connects the swash plate with the rotor and transmits torque from the driving shaft to the swash plate regardless of the inclination angle of the swash plate.Type: ApplicationFiled: April 17, 2001Publication date: October 18, 2001Inventors: Masaki Ota, Tomoji Tarutani, Tomohiro Wakita, Kenta Nishimura, Yoshinori Inoue, Masafumi Ito
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Publication number: 20010028856Abstract: A variable displacement compressor 10 comprises a wall 1a that seals a cylinder bore 14, and is integrally formed with a cylinder block 1. A rear plate 5 having a plate-like shape is fastened via a gasket 6 to a location that extends to the inner rear side of a wall 1a. Suction valves 40 and discharge valves 44 are disposed within the wall 1a.Type: ApplicationFiled: April 10, 2001Publication date: October 11, 2001Inventors: Masaki Ota, Tomoji Tarutani, Tomohiro Wakita, Taku Adaniya, Ryo Matsubara, Yoshikazu Fukutani
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Patent number: 6250648Abstract: A metallic base gasket coated with elastic membrane having an outer sealing portion for sealing an outer circumference of a refrigerant compressor and an inner sealing portion for sealing boundaries between high and low pressure regions within the compressor, the outer and inner sealing portions being formed in an elastically deformable ridge, and at least one section of the ridge of the inner sealing portion being trifurcatedly connected to a portion of the ridge of the outer sealing portion to have a geometrical arrangement in which apex lines of the connected three ridges are equiangularly spaced apart from one another with respect to the center of the trifurcated connection of the ridges. The gasket may have an extended flat or curved face portion at the trifurcatedly connected ridges to permit the apexes of the connected ridges lie in the extended flat or curved face portion.Type: GrantFiled: March 27, 2000Date of Patent: June 26, 2001Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Hayato Ikeda, Noriyuki Shintoku, Keishi Nakagaki, Tomohiro Wakita
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Patent number: 6186514Abstract: A gasket having a surface thereof coated with an elastic membrane and adapted to be interposed, together with a valve plate and a discharge valve member, between a cylinder block and a housing of a refrigerant compressor under compression. The gasket includes an outer sealing portion for sealing an outer circumference of the compressor against an atmospheric environment therearound, and an inner sealing portion, connected to the outer sealing portion, for sealing between a high pressure region and a low pressure region within the compressor. Each of the outer and inner sealing portions includes in its entirety a deformable ridge which is shaped as a convexly curved projection with an apex line continuously extending along a length of the each outer and inner sealing portion. When the gasket is located in a proper position in the compressor, the apex lines of the ridges of the respective sealing portions are abutted to the front or rear housing of the compressor.Type: GrantFiled: January 5, 1998Date of Patent: February 13, 2001Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Hayato Ikeda, Noriyuki Shintoku, Keishi Nakagaki, Tomohiro Wakita