Patents by Inventor Yasuo Yamanaka
Yasuo Yamanaka 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: 10385928Abstract: A clutch is comprised of a first clutch member including a plurality of first clutch teeth arranged circumferentially around an axis; and a second clutch member including a plurality of second clutch teeth arranged circumferentially around the axis and engageable with the first clutch teeth, each of the second clutch teeth including an end portion internal or external relative to the axis and a pair of side faces facing each other across the end portion, any of the side faces getting in contact with the first clutch teeth when engaged, each of the pair of side faces including a first face being flat and a second face being continuous to the first face and the end portion and having a slope oblique to the first face, wherein one of the first clutch member and the second clutch member is axially movable relative to the other.Type: GrantFiled: August 3, 2016Date of Patent: August 20, 2019Assignee: GKN Driveline Japan LtdInventors: Yasuo Yamanaka, Hideyuki Inose
-
Patent number: 10308113Abstract: A differential device is provided with an outer case receiving torque; a differential gear set so geared as to allow differential motion between first and second axles; a clutch including an inner case supporting the differential gear set, and a clutch ring drivingly engaged with the outer case to transmit the torque from the outer case and axially movable to disconnectably connect with the inner case, the clutch ring having an end section led out of the outer case; a first spring creating a repulsive force in a disconnecting direction; a second spring creating a repulsive force in a connecting direction; and an actuator including a plunger so disposed as to exert a thrust force axially on the end section of the clutch ring, and a solenoid driving the plunger in a direction to make the clutch ring disconnect from or connect with the inner case.Type: GrantFiled: July 5, 2017Date of Patent: June 4, 2019Assignee: GKN Driveline Japan LtdInventors: Hideyuki Inose, Yasuo Yamanaka, Yasushi Nagamori
-
Patent number: 9797495Abstract: A clutch to be combined with a rotary machine rotating about an axis is comprised of a rotary member including a first face perpendicular to the axis, a first bottom receding in an axial direction from the first face, and plural first clutch teeth being arranged in a circumferential direction and respectively projecting from both the first face and the first bottom; and a clutch member movable in the axial direction relative to the rotary member, the clutch member including a second bottom, plural second clutch teeth being arranged in a circumferential direction and respectively projecting from the second bottom to be respectively engageable with the plural first clutch teeth, and an internal peripheral wall connecting internal ends of the plural second clutch teeth and projecting in the axial direction toward the rotary member.Type: GrantFiled: August 3, 2016Date of Patent: October 24, 2017Assignee: GKN Driveline Japan Ltd.Inventors: Hideyuki Inose, Yasuo Yamanaka, Atsushi Maruyama
-
Publication number: 20170297428Abstract: A differential device is provided with an outer case receiving torque; a differential gear set so geared as to allow differential motion between first and second axles; a clutch including an inner case supporting the differential gear set, and a clutch ring drivingly engaged with the outer case to transmit the torque from the outer case and axially movable to disconnectably connect with the inner case, the clutch ring having an end section led out of the outer case; a first spring creating a repulsive force in a disconnecting direction; a second spring creating a repulsive force in a connecting direction; and an actuator including a plunger so disposed as to exert a thrust force axially on the end section of the clutch ring, and a solenoid driving the plunger in a direction to make the clutch ring disconnect from or connect with the inner case.Type: ApplicationFiled: July 5, 2017Publication date: October 19, 2017Inventors: Hideyuki Inose, Yasuo Yamanaka, Yasushi Nagamori
-
Patent number: 9695922Abstract: A clutch device is comprised of: an end wall rotatable about an axis; an extended wall elongated as a unitary body from a first face of the end wall along the axis to define a circular slot; a clutch including a clutch member movable along the axis and capable of resting on a second face of the end wall; and a solenoid configured to drive the clutch member along the axis, the solenoid including a core conducting a magnetic flux, the core including a fitting portion slidably fitting in the circular slot, an abutment portion projecting radially outward from the fitting portion to abut along the axis on the extended wall, and a back portion projecting outward along the axis from the circular slot and retracting radially inward from the contact portion.Type: GrantFiled: April 11, 2016Date of Patent: July 4, 2017Assignee: GKN Driveline Japan Ltd.Inventors: Yasuo Yamanaka, Atsushi Maruyama
-
Publication number: 20160341257Abstract: A clutch is comprised of a first clutch member including a plurality of first clutch teeth arranged circumferentially around an axis; and a second clutch member including a plurality of second clutch teeth arranged circumferentially around the axis and engageable with the first clutch teeth, each of the second clutch teeth including an end portion internal or external relative to the axis and a pair of side faces facing each other across the end portion, any of the side faces getting in contact with the first clutch teeth when engaged, each of the pair of side faces including a first face being flat and a second face being continuous to the first face and the end portion and having a slope oblique to the first face, wherein one of the first clutch member and the second clutch member is axially movable relative to the other.Type: ApplicationFiled: August 3, 2016Publication date: November 24, 2016Inventors: Yasuo Yamanaka, Hideyuki Inose
-
Publication number: 20160341294Abstract: A clutch to be combined with a rotary machine rotating about an axis is comprised of a rotary member including a first face perpendicular to the axis, a first bottom receding in an axial direction from the first face, and plural first clutch teeth being arranged in a circumferential direction and respectively projecting from both the first face and the first bottom; and a clutch member movable in the axial direction relative to the rotary member, the clutch member including a second bottom, plural second clutch teeth being arranged in a circumferential direction and respectively projecting from the second bottom to be respectively engageable with the plural first clutch teeth, and an internal peripheral wall connecting internal ends of the plural second clutch teeth and projecting in the axial direction toward the rotary member.Type: ApplicationFiled: August 3, 2016Publication date: November 24, 2016Inventors: Hideyuki Inose, Yasuo Yamanaka, Atsushi Maruyama
-
Publication number: 20160223064Abstract: A clutch device is comprised of: an end wall rotatable about an axis; an extended wall elongated as a unitary body from a first face of the end wall along the axis to define a circular slot; a clutch including a clutch member movable along the axis and capable of resting on a second face of the end wall; and a solenoid configured to drive the clutch member along the axis, the solenoid including a core conducting a magnetic flux, the core including a fitting portion slidably fitting in the circular slot, an abutment portion projecting radially outward from the fitting portion to abut along the axis on the extended wall, and a back portion projecting outward along the axis from the circular slot and retracting radially inward from the contact portion.Type: ApplicationFiled: April 11, 2016Publication date: August 4, 2016Inventors: Yasuo Yamanaka, Atsushi Maruyama
-
Patent number: 8926471Abstract: A differential device is comprised of a casing with a first end wall and a side wall forming a corner with the first end wall; a differential gear set including an input gear and first and second side gears that are so meshed with the input gear to allow differential motion between the first and second side gears; and a clutch member being housed in and axially movable in the casing from a first position where the clutch member engages with the first side gear to limit the differential motion to a second position where the clutch member rests on the first end wall and frees the first side gear, the clutch member slidably fitting on the first side gear so as to keep the clutch member concentric with the first side gear.Type: GrantFiled: June 26, 2013Date of Patent: January 6, 2015Assignee: GKN Driveline Japan LtdInventors: Yasuo Yamanaka, Atsushi Maruyama
-
Patent number: 8858384Abstract: A bevel gear used in a differential device for a vehicle is comprised of: a body having an axis, a conical pitch surface around the axis, an opposite surface opposed to the conical pitch surface, and a side surface around the axis; gear teeth formed on the pitch surface, each of the gear teeth having a top land projecting from the pitch surface; and clutch teeth formed on the opposite surface, each of the clutch teeth having a bottom land standing back from the opposite surface, each of the bottom lands of the clutch teeth being aligned with any of the top lands of the gear teeth in a line parallel to the axis.Type: GrantFiled: March 6, 2013Date of Patent: October 14, 2014Assignee: GKN Driveline Japan LtdInventors: Masaaki Fusegi, Yasuo Yamanaka
-
Patent number: 8824035Abstract: A molded plastic part prepared by injecting a resin in a cavity of a die so that a pressure is generated in the resin in the cavity and at least one transfer wall surface of the cavity is transferred to the resin. The plastic part has at least one transferred surface; at least one imperfectly transferred concave portion on a first surface thereof other than the transferred surface; and at least one imperfectly transferred convex portion on the first surface or a second surface thereof other than the transferred surface. The ratio (a)/(b) of the thickness (a) of the plastic part in a direction perpendicular to the transferred surface to the thickness (b) of the plastic part in a direction parallel to the transferred surface is less than 1.Type: GrantFiled: December 6, 2010Date of Patent: September 2, 2014Assignee: Ricoh Company, LimitedInventors: Takamichi Ohhashi, Yasuo Yamanaka, Akio Hirano, Eiichi Hayashi, Go Takahashi, Kan Aoki
-
Patent number: 8796363Abstract: A flame retardant resin composition including: a thermoplastic resin; and a flame retardant, wherein the flame retardant includes a phosphorylated lignin derivative, and wherein the phosphorylated lignin derivative is produced by adding phosphoric acid to a lignin derivative obtained by subjecting a naturally occurring lignin to a predetermined treatment.Type: GrantFiled: February 24, 2012Date of Patent: August 5, 2014Assignee: Ricoh Company, Ltd.Inventors: Tadakatsu Harada, Yasuo Yamanaka, Yasuyuki Matsushita, Kazuhiko Fukushima
-
Patent number: 8749863Abstract: A plastic article is formable by using a metal die having a cavity to accommodate melted resin therein at a given pressure. The plastic article includes a transfer face to which is transferred a face shape of the metal die, a projection disposed at least one face other than the transfer face, an incomplete transfer face having a concave shape disposed at the same face on which the projection is disposed, formed by an incomplete transfer of a face shape of the cavity of the metal die, and an incomplete transfer face having a convex shape disposed at least one face other than the transfer face.Type: GrantFiled: July 11, 2011Date of Patent: June 10, 2014Assignee: Ricoh Company, Ltd.Inventors: Takamichi Ohhashi, Yasuo Yamanaka, Eiichi Hayashi, Go Takahashi
-
Publication number: 20140004988Abstract: A differential device is comprised of a casing with a first end wall and a side wall forming a corner with the first end wall; a differential gear set including an input gear and first and second side gears that are so meshed with the input gear to allow differential motion between the first and second side gears; and a clutch member being housed in and axially movable in the casing from a first position where the clutch member engages with the first side gear to limit the differential motion to a second position where the clutch member rests on the first end wall and frees the first side gear, the clutch member slidably fitting on the first side gear so as to keep the clutch member concentric with the first side gear.Type: ApplicationFiled: June 26, 2013Publication date: January 2, 2014Inventors: Yasuo YAMANAKA, Atsushi Maruyama
-
Publication number: 20130317138Abstract: A flame retardant resin composition including: a thermoplastic resin; and a flame retardant, wherein the flame retardant includes a phosphorylated lignin derivative, and wherein the phosphorylated lignin derivative is produced by adding phosphoric acid to a lignin derivative obtained by subjecting a naturally occurring lignin to a predetermined treatment.Type: ApplicationFiled: February 24, 2012Publication date: November 28, 2013Applicant: RICOH COMPANY ,LTD.Inventors: Tadakatsu Harada, Yasuo Yamanaka, Yasuyuki Matsushita, Kazuhiko Fukushima
-
Publication number: 20130237363Abstract: A bevel gear used in a differential device for a vehicle is comprised of: a body having an axis, a conical pitch surface around the axis, an opposite surface opposed to the conical pitch surface, and a side surface around the axis; gear teeth formed on the pitch surface, each of the gear teeth having a top land projecting from the pitch surface; and clutch teeth formed on the opposite surface, each of the clutch teeth having a bottom land standing back from the opposite surface, each of the bottom lands of the clutch teeth being aligned with any of the top lands of the gear teeth in a line parallel to the axis.Type: ApplicationFiled: March 6, 2013Publication date: September 12, 2013Applicant: GKN Driveline Japan Ltd.Inventors: Masaaki FUSEGI, Yasuo Yamanaka
-
Patent number: 8481618Abstract: A disclosed fire retardant resin composition includes a thermoplastic resin and a fire retardant. The fire retardant is formed of phosphorated polysaccharide that is formed by attaching thiophosphoric acid ester or phosphoric acid ester to a side chain of natural polysaccharide.Type: GrantFiled: June 16, 2009Date of Patent: July 9, 2013Assignee: Ricoh Company, Ltd.Inventors: Tadakatsu Harada, Yasuo Yamanaka, Hidekazu Yaginuma, Yoshiyuki Nishio, Dan Aoki
-
Patent number: 8445628Abstract: Disclosed is a copolymer resin composition including a lactic acid copolymer, the lactic acid copolymer containing monomer units represented by the following chemical formulas [1], [2], and [3], wherein a content of a monomer unit represented by the chemical formula [3] is 50 mol % or more and 95 mol % or less, a weight-average molecular weight of the lactic acid copolymer is 20,000 or more and 1,000,000 or less, and a deflection temperature of the lactic acid copolymer under load is 65° C. or higher and 100° C. or lower at a bending stress of 1.80 MPa.Type: GrantFiled: June 30, 2010Date of Patent: May 21, 2013Assignee: Ricoh Company, Ltd.Inventors: Yasuo Yamanaka, Tadakatsu Harada, Hidekazu Yaginuma, Masanobu Munekata, Kenji Tajima, Yasuharu Satoh, Tokuo Matsushima
-
Publication number: 20120013964Abstract: A plastic article is formable by using a metal die having a cavity to accommodate melted resin therein at a given pressure. The plastic article includes a transfer face to which is transferred a face shape of the metal die, a projection disposed at least one face other than the transfer face, an incomplete transfer face having a concave shape disposed at the same face on which the projection is disposed, formed by an incomplete transfer of a face shape of the cavity of the metal die, and an incomplete transfer face having a convex shape disposed at least one face other than the transfer face.Type: ApplicationFiled: July 11, 2011Publication date: January 19, 2012Inventors: Takamichi Ohhashi, Yasuo Yamanaka, Eiichi Hayashi, Go Takahashi
-
Publication number: 20110164295Abstract: A molded plastic part prepared by injecting a resin in a cavity of a die so that a pressure is generated in the resin in the cavity and at least one transfer wall surface of the cavity is transferred to the resin. The plastic part has at least one transferred surface; at least one imperfectly transferred concave portion on a first surface thereof other than the transferred surface; and at least one imperfectly transferred convex portion on the first surface or a second surface thereof other than the transferred surface. The ratio (a)/(b) of the thickness (a) of the plastic part in a direction perpendicular to the transferred surface to the thickness (b) of the plastic part in a direction parallel to the transferred surface is less than 1.Type: ApplicationFiled: December 6, 2010Publication date: July 7, 2011Inventors: Takamichi OHHASHI, Yasuo Yamanaka, Akio Hirano, Eiichi Hayashi, Go Takahashi, Kan Aoki