Patents by Inventor Hironori Kurosawa
Hironori Kurosawa 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: 10641322Abstract: A bearing assembly unit (5) includes an outer holder (10) configured with a cylindrical member; an inner holder (20) that is configured with a cylindrical member, and inserted into an inner circumferential surface of the outer holder (10) so as to be movable in an axial direction; and a rolling bearing element (30) which is inserted into an inner circumferential section of the inner holder (20) so as to be fixed at least in a circumferential direction, and into which a shaft (40) is inserted so as to be fixed there; wherein, between the outer holder (10) and the inner holder (20), there is provided a rotation restriction mechanism (12, 22) that prevents a relative rotation between the outer holder (10) and the inner holder (20).Type: GrantFiled: July 30, 2018Date of Patent: May 5, 2020Assignee: NIDEC SANKYO CORPORATIONInventors: Naoya Isaji, Hironori Kurosawa
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Patent number: 10298093Abstract: A tubular motor may include a tubular case, a motor unit provided inside the case, and a first planetary gear unit placed inside the case at an output side in the motor shaft direction with respect to the motor unit. On the motor unit, a concave part may be formed in an output side end surface of an output side end plate section that supports a rotor, at an output side of the rotor. On the first planetary gear unit, a planetary carrier may include a supporting plate that overlaps with planetary gears at an counter-output side in order to support the planetary gears from the counter-output side. The first planetary gear unit may be immediately adjacent to the output side end plate section at an output side.Type: GrantFiled: October 2, 2015Date of Patent: May 21, 2019Assignee: NIDEC SANKYO CORPORATIONInventors: Masaaki Ando, Shinichi Yoshikawa, Goro Nakamura, Hironori Kurosawa, Yuu Akuzawa, Tadashi Takeda, Noburu Ashibe
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Publication number: 20190103785Abstract: A linear-motion rotation drive device includes an output shaft, a rotation drive unit that rotates the output shaft, a linear-motion drive unit that linearly moves the output shaft, and a ball spline bearing coaxially supporting the output shaft to be movable in an axial direction and to transmit rotation of the rotation drive unit to the output shaft. The rotation drive unit is a rotary motor and includes an annular rotor with a larger inner diameter than the ball spline bearing, and a pair of rotor bearings holding the rotor to be rotatable in a direction around the axis at positions spaced apart in the axial direction. The ball spline bearing is fixed to the rotor in a state of having a radial gap between the ball spline bearing and the rotor on an inner circumferential side of the rotor, and the ball spline bearing and the rotor rotate integrally.Type: ApplicationFiled: March 30, 2017Publication date: April 4, 2019Inventor: Hironori KUROSAWA
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Publication number: 20190049230Abstract: Provided is a linear motion and rotation drive apparatus capable of minimizing inertia due to a magnetic scale attached to an output shaft when the output shaft is linearly moved or rotate. A linear motion and rotation drive apparatus (1) includes an output shaft (2), a linear motor (3), a rotational motor (4), a ball spline bearing (5), a magnetic scale (8), a first magnetic detection element (41) configured to detect a linear motion, and a second magnetic detection element (42) configured to detect a rotational motion. The magnetic scale (8) includes a lattice-shaped magnetized pattern (37) in which S poles and N poles are alternately arranged in an axis L direction and S poles and N poles are alternately magnetized in a direction around the axis (L) on a circumferential surface thereof in the direction around an axis (L). The first magnetic detection element (41) and the second magnetic detection element (42) are disposed to face the magnetized pattern (37).Type: ApplicationFiled: September 16, 2016Publication date: February 14, 2019Inventors: Hironori KUROSAWA, Soichi WATANABE, Katsuya MORIYAMA, Fusayoshi ARUGA
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Publication number: 20190032706Abstract: A bearing assembly unit (5) includes an outer holder (10) configured with a cylindrical member; an inner holder (20) that is configured with a cylindrical member, and inserted into an inner circumferential surface of the outer holder (10) so as to be movable in an axial direction; and a rolling bearing element (30) which is inserted into an inner circumferential section of the inner holder (20) so as to be fixed at least in a circumferential direction, and into which a shaft (40) is inserted so as to be fixed there; wherein, between the outer holder (10) and the inner holder (20), there is provided a rotation restriction mechanism (12, 22) that prevents a relative rotation between the outer holder (10) and the inner holder (20).Type: ApplicationFiled: July 30, 2018Publication date: January 31, 2019Applicant: NIDEC SANKYO CORPORATIONInventors: Naoya ISAJI, Hironori KUROSAWA
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Publication number: 20190032707Abstract: The bearing assembly (10) comprises the bearing holder (11) formed of a cylindrical member, the rolling bearings (12, 13) press-fitted and fixed to the inside circumference of the bearing holder (11), the shaft member (14) which is inserted to the inner circumferential side of the rolling bearings (12, 13) and has the hollow portion (14a) at the position thereof opposing the rolling bearings (12, 13) in the radial direction, and the ball members (15, 16) press-fitted to the hollow portion (14a) of the shaft member (14) so as to press the shaft member (14) against the rolling bearings (12, 13) in the radial direction and secure them.Type: ApplicationFiled: July 30, 2018Publication date: January 31, 2019Applicant: NIDEC SANKYO CORPORATIONInventors: Naoya ISAJI, Hironori KUROSAWA
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Publication number: 20170271947Abstract: A tubular motor may include a tubular case, a motor unit provided inside the case, and a first planetary gear unit placed inside the case at an output side in the motor shaft direction with respect to the motor unit. On the motor unit, a concave part may be formed in an output side end surface of an output side end plate section that supports a rotor, at an output side of the rotor. On the first planetary gear unit, a planetary carrier may include a supporting plate that overlaps with planetary gears at an counter-output side in order to support the planetary gears from the counter-output side. The first planetary gear unit may be immediately adjacent to the output side end plate section at an output side.Type: ApplicationFiled: October 2, 2015Publication date: September 21, 2017Inventors: Masaaki ANDO, Shinichi YOSHIKAWA, Goro NAKAMURA, Hironori KUROSAWA, Yuu AKUZAWA, Tadashi TAKEDA, Noburu ASHIBE
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Patent number: 6693733Abstract: A polygonal mirror fixing device comprising a rotary body, to which a polygonal mirror is adapted to be mounted, has a mounting circumferential surface in a center opening of the polygonal mirror and a mounting bottom surface which projects from the mounting circumferential surface in the radially outward direction. A mirror pressing member which is composed of the same material as the polygonal mirror is positioned to have contact with an axial end surface of the polygonal mirror, the other side from the end surface the contacts the mounting bottom surface. A mirror fixing member and a spring member are attached axially to the other side of the mirror pressing member to press the mirror pressing member in the axial direction. By the pressing force of the mirror fixing member in the axial direction, the mirror pressing member is pressed in the axial direction toward the mounting bottom surface so that the polygonal mirror is fixed.Type: GrantFiled: November 15, 2001Date of Patent: February 17, 2004Assignee: Sankyo Seiki Mfg. Co., Ltd.Inventor: Hironori Kurosawa
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Publication number: 20020085294Abstract: A polygonal mirror fixing device comprising a rotary body, to which a polygonal mirror is adapted to be mounted, having a mounting circumferential surface and a mounting bottom surface. The mounting circumferential surface is in a center opening of the polygonal mirror and the mounting bottom surface projects from the mounting circumferential surface in the radially outward direction for having contact with an axial end surface of the polygonal mirror. A mirror fixing member and a spring member are attached axially from the outside of the polygonal mirror to the mounting circumferential surface of the rotary body. By the pressing force of the mirror fixing member in the axial direction, the polygonal mirror is pressed in the axial direction toward the mounting bottom surface so that the polygonal mirror is fixed to the rotary body.Type: ApplicationFiled: November 15, 2001Publication date: July 4, 2002Inventor: Hironori Kurosawa
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Patent number: 6215217Abstract: In a motor 5 in which a thrust bearing 8 using the magnetic force acting between a stator 40 side and a rotor 20 side and a radial bearing 7 using the dynamic pressure generated between the outer peripheral surface 440 of a fixed shaft 44 and the inner peripheral surface of the center hole 21 of the rotor 20 are formed between the stator 40 and the rotor 20, along the axial direction L of the motor shaft between the outer peripheral surface 440 of the fixed shaft 44 and the inner peripheral surface of the center hole 21 of the rotor 20, an annular clearance 70 for generating dynamic pressure between the outer peripheral surface 440 of the fixed shaft 44 and the inner peripheral surface of the center hole 21 of the rotor 20, an annular air chamber 92 for an air damper which communicates with this clearance, and an annular clearance 91 for the air damper which communicates the chamber with the external portion are formed in this order.Type: GrantFiled: January 4, 2000Date of Patent: April 10, 2001Assignee: Kabushiki Kaisha Sankyo Seiki SeisakushoInventor: Hironori Kurosawa
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Patent number: 6155721Abstract: A dynamic-pressure fluid bearing comprises bearing parts formed by a pair of dynamic-pressure surfaces. One of the dynamic-pressure surfaces of the bearing parts is a polyamideimide coating thicker than 3 .mu.m and the other surface is metal. The bearing is particularly applicable to driving motors for polygon mirrors. In addition, a so-called particle removing function is added to one or more of the surfaces of the bearing parts or a position nearby that causes easier removal of dust and other particles accumulated on the parts.Type: GrantFiled: June 8, 1998Date of Patent: December 5, 2000Assignee: Sankyo Seiki Mfg. Co., Ltd.Inventors: Hironori Kurosawa, Tokuhisa Tsutsui, Yasushi Mizusaki, Hiromasa Marumo, Masamichi Hayakawa
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Patent number: 5763967Abstract: A dynamic-pressure fluid bearing comprises bearing parts formed by a pair of dynamic-pressure surfaces. One of the dynamic-pressure surfaces of the bearing parts is a polyamideimide coating thicker than 3 .mu.m and the other surface is metal. The bearing is particularly applicable to driving motors for polygon mirrors.Type: GrantFiled: September 17, 1996Date of Patent: June 9, 1998Assignee: Sankyo Seiki Mfg. Co., Ltd.Inventors: Hironori Kurosawa, Tokuhisa Tsutsui, Yasushi Mizusaki, Hiromasa Marumo