Patents by Inventor Keiichi Uemura
Keiichi Uemura 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: 7569959Abstract: A motor has a field body having a number of field poles and an armature body having a number of coils which is placed outside of the above described field body in the radial direction. A commutator secured to the armature body has a number of segments to which the coils are respectively connected. The motor has a power supplying part for supplying a current to the coils and a brush holder which is secured to the field body. The brush holder contains an anode side brush device which makes contact with and slides against the commutator and the power supplying part and a cathode side brush device which makes contact with and slides against the commutator and the power supplying part. Accordingly, the efficiency of use of the coils can be increased.Type: GrantFiled: August 31, 2005Date of Patent: August 4, 2009Assignee: ASMO Co., Ltd.Inventors: Masayuki Kuwano, Shinji Santo, Keiichi Uemura, Toshio Yamamoto
-
Publication number: 20070205685Abstract: A motor has a field body having a number of field poles and an armature body having a number of coils which is placed outside of the above described field body in the radial direction. A commutator secured to the armature body has a number of segments to which the coils are respectively connected. The motor has a power supplying part for supplying a current to the coils and a brush holder which is secured to the field body. The brush holder contains an anode side brush device which makes contact with and slides against the commutator and the power supplying part and a cathode side brush device which makes contact with and slides against the commutator and the power supplying part. Accordingly, the efficiency of use of the coils can be increased.Type: ApplicationFiled: August 31, 2005Publication date: September 6, 2007Applicant: ASMO CO., LTD.Inventors: Masayuki Kuwano, Shinji Santo, Keiichi Uemura, Toshio Yamamoto
-
Patent number: 7254881Abstract: A motor includes a stator having magnets, a rotor having teeth, a commutator secured to the rotor, and brushes. A coil is wound about each tooth. The commutator is connected to the coils. The brushes slidably contact the commutator. The number of the magnets and the number of the teeth are determined such that the resultant of torque vectors that act on the teeth is zero. For example, the number of the magnet is six, and the number of the teeth is eight. As a result, the rotor is prevented from vibrating.Type: GrantFiled: August 30, 2004Date of Patent: August 14, 2007Assignee: Asmo Co., Ltd.Inventors: Kaname Egawa, Toshio Yamamoto, Keiichi Uemura, Yasuhiro Toyama, Shinji Santo, Yoshiyuki Takabe, Takahiro Nakayama
-
Publication number: 20050029894Abstract: A motor includes a stator having magnets, a rotor having teeth, a commutator secured to the rotor, and brushes. A coil is wound about each tooth. The commutator is connected to the coils. The brushes slidably contact the commutator. The number of the magnets and the number of the teeth are determined such that the resultant of torque vectors that act on the teeth is zero. For example, the number of the magnet is six, and the number of the teeth is eight. As a result, the rotor is prevented from vibrating.Type: ApplicationFiled: August 30, 2004Publication date: February 10, 2005Applicant: Asmo Co., Ltd.Inventors: Kaname Egawa, Toshio Yamamoto, Keiichi Uemura, Yasuhiro Toyama, Shinji Santo, Yoshiyuki Takabe, Takahiro Nakayama
-
Patent number: 6819025Abstract: A motor includes a stator having magnets, a rotor having teeth, a commutator secured to the rotor, and brushes. A coil is wound about each tooth. The commutator is connected to the coils. The brushes slidably contact the commutator. The number of the magnets and the number of the teeth are determined such that the resultant of torque vectors that act on the teeth is zero. For example, the number of the magnet is six, and the number of the teeth is eight. As a result, the rotor is prevented from vibrating.Type: GrantFiled: February 28, 2002Date of Patent: November 16, 2004Assignee: Asmo Co., Ltd.Inventors: Kaname Egawa, Toshio Yamamoto, Keiichi Uemura, Yasuhiro Toyama, Shinji Santo, Yoshiyuki Takabe, Takahiro Nakayama
-
Patent number: 6809446Abstract: A yoke housing accommodates an armature having a coil and has a tubular circumferential wall. The yoke housing includes a plurality of pieces, which form the yoke housing, and a fracture portion, which is located along a boundary between the pieces. The fracture portion fractures when a compression force is applied from the outside to break the yoke housing into the pieces.Type: GrantFiled: March 28, 2003Date of Patent: October 26, 2004Assignee: Asmo Co., Ltd.Inventors: Toshio Yamamoto, Tomoyuki Kikuta, Masahiko Komoda, Masayuki Kuwano, Hideki Toida, Keiichi Uemura
-
Patent number: 6803695Abstract: An armature includes a rotary shaft, a core, and a coupling member. The core is formed by using magnetic metal powder and has a tooth. A wire is wound about the tooth. The coupling member has a ductility that is higher than the ductility of the core. The coupling member is located between the core and the rotary shaft. The rotary shaft is press fitted in the coupling member, and the coupling member is press fitted in the core.Type: GrantFiled: March 4, 2003Date of Patent: October 12, 2004Assignee: ASMO Co., Ltd.Inventors: Toshio Yamamoto, Keiichi Uemura, Tomoyuki Kikuta, Masahiko Komoda, Masayuki Kuwano, Hideki Toida
-
Publication number: 20040135446Abstract: A yoke housing accommodates an armature having a coil and has a tubular circumferential wall. The yoke housing includes a plurality of pieces, which form the yoke housing, and a fracture portion, which is located along a boundary between the pieces. The fracture portion fractures when a compression force is applied from the outside to break the yoke housing into the pieces.Type: ApplicationFiled: March 28, 2003Publication date: July 15, 2004Applicant: ASMO CO., LTD.Inventors: Toshio Yamamoto, Tomoyuki Kikuta, Masahiko Komoda, Masayuki Kuwano, Hideki Toida, Keiichi Uemura
-
Publication number: 20030201691Abstract: An armature includes a rotary shaft, a core, and a coupling member. The core is formed by using magnetic metal powder and has a tooth. A wire is wound about the tooth. The coupling member has a ductility that is higher than the ductility of the core. The coupling member is located between the core and the rotary shaft. The rotary shaft is press fitted in the coupling member, and the coupling member is press fitted in the core.Type: ApplicationFiled: March 4, 2003Publication date: October 30, 2003Applicant: ASMO CO., LTD.Inventors: Toshio Yamamoto, Keiichi Uemura, Tomoyuki Kikuta, Masahiko Komoda, Masayuki Kuwano, Hideki Toida
-
Patent number: 6504277Abstract: A rotor of a motor includes an engaging portion that engages an annular portion of a yoke based on movement of a rotatable shaft in a thrust direction to brake the rotatable shaft. There is provided a Belleville spring that limits the movement of the rotatable shaft in the thrust direction to prevent engagement of the engaging portion with the annular portion when a thrust load applied on the rotatable shaft is equal to or smaller than a predetermined value. Furthermore, the Belleville spring allows the movement of the rotatable shaft in the thrust direction to allow the engagement of the engaging portion with the annular portion when the thrust load applied on the rotatable shaft is larger than the predetermined value.Type: GrantFiled: March 9, 2001Date of Patent: January 7, 2003Assignee: Asmo Co., Ltd.Inventors: Keiichi Uemura, Toshio Yamamoto
-
Publication number: 20020121831Abstract: A motor includes a stator having magnets, a rotor having teeth, a commutator secured to the rotor, and brushes. A coil is wound about each tooth. The commutator is connected to the coils. The brushes slidably contact the commutator. The number of the magnets and the number of the teeth are determined such that the resultant of torque vectors that act on the teeth is zero. For example, the number of the magnet is six, and the number of the teeth is eight. As a result, the rotor is prevented from vibrating.Type: ApplicationFiled: February 28, 2002Publication date: September 5, 2002Applicant: Asmo Co., Ltd.Inventors: Kaname Egawa, Toshio Yamamoto, Keiichi Uemura, Yasuhiro Toyama, Shinji Santo, Yoshiyuki Takabe, Takahiro Nakayama
-
Publication number: 20020047407Abstract: A rotor of a motor includes an engaging portion that engages an annular portion of a yoke based on movement of a rotatable shaft in a thrust direction to brake the rotatable shaft. There is provided a Belleville spring that limits the movement of the rotatable shaft in the thrust direction to prevent engagement of the engaging portion with the annular portion when a thrust load applied on the rotatable shaft is equal to or smaller than a predetermined value. Furthermore, the Belleville spring allows the movement of the rotatable shaft in the thrust direction to allow the engagement of the engaging portion with the annular portion when the thrust load applied on the rotatable shaft is larger than the predetermined value.Type: ApplicationFiled: March 9, 2001Publication date: April 25, 2002Inventors: Keiichi Uemura, Toshio Yamamoto
-
Patent number: 6242835Abstract: An armature for a motor has a core, which comprises a plurality of core sheets stacked together in an axial direction. Each sheet has a plurality of teeth having an extended protrusion which covers an armature winding fitted in slots. The extended protrusion may be a pair of bendable long protrusion pieces on each tooth of one sheet, and a pair of bendable short protrusion pieces on each tooth of another sheet stacked adjacently to the one sheet. Alternatively, the extended protrusion may be a pair of long protrusion piece and short protrusion piece on each tooth. The protrusion pieces are bent to cover the armature winding after winding operation, leaving only a narrow slit between the two extended protrusions. The slit is discontinuous in an axial direction of the core. Thus, the armature winding is restricted from slipping out from the slots, and cogging in torque of the motor is reduced.Type: GrantFiled: February 25, 1999Date of Patent: June 5, 2001Assignee: ASMO Co., Ltd.Inventors: Keiichi Uemura, Toshio Yamamoto
-
Patent number: 5938252Abstract: A door member locking/unlocking apparatus comprises a motor for driving an output shaft rotationally, and a latch rotatably hinged in a position to engage with a striker for retaining a door member in a closed state and urged in a direction to disengage from the striker. A first ratchet regulates the latch in a partially latched position and in a fully latched position. A second ratchet turns the latch from the partially latched position to the fully latched position. An engaging pin provided on the first ratchet releases the retention of the latch in the fully latched position by the first ratchet. A cam is arranged to have an axis of rotation in parallel with that of the latch. The cam is rotationally driven by the motor for actuating the second ratchet and the engaging pin.Type: GrantFiled: August 21, 1997Date of Patent: August 17, 1999Assignee: ASMO Co., Ltd.Inventors: Keiichi Uemura, Mitsuhiro Kondo
-
Patent number: 4742280Abstract: A control device for a car wiper apparatus is disclosed, in which the wiper apparatus is driven in forward or reverse directions by the function of an electronic circuit. The control electronic circuit is so configured as to minimize the number of connection brushes for controlling the forward and reverse operations of the wiper motor which reciprocates the wiper blade. The reduced number of the connection brushes, which are arranged in the wiper motor, realizes a compact shape of the wiper motor as a whole. The electronic circuit functions to drive the wiper motor in forward and reverse directions within a predetermined angle thereby to rotate the crank arm connected with the wiper motor and the wiper blade with a small predetermined angle for reciprocal wiping operating, thus making it possible to mount the wiper apparatus in the small internal space of the car.Type: GrantFiled: February 6, 1987Date of Patent: May 3, 1988Assignee: Nippondenso Co., Ltd.Inventors: Toshihiro Ishikawa, Keiichi Uemura, Makoto Aso, Masaaki Fukaya
-
Patent number: 4599546Abstract: A wiper device has a reversible electric motor having an output shaft operatively connected to a reciprocally movable wiper blade. The electric circuit including motor armature is constructed such that, when a wiper switch is on, the motor shaft is reciprocally rotated in alternate directions within a predetermined angular range less than 360.degree. to reciprocally drive the wiper blade and that, when the wiper switch is turned off, the motor shaft is rotated beyond the predetermined angular range to move the wiper blade to a rest position out of its wiping range.Type: GrantFiled: December 26, 1984Date of Patent: July 8, 1986Assignee: Nippondenso Co., Ltd.Inventor: Keiichi Uemura