Patents by Inventor Munenori Yamaguchi
Munenori Yamaguchi 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: 7677325Abstract: The invention of this application provides a pneumatic tool with a simple structure. The tool has a tubular housing, a stationary shaft, a first piston slidable along the stationary shaft, a second piston, a tool attachment member drivingly connected to the second piston, a compressed air supply path extending through the stationary shaft to supply compressed air between the first and second pistons, and an air discharge path for discharging the compressed air supplied between the first and second pistons to the outside of the housing when the first and second pistons are separated by a predetermined distance. The compressed air supply path has an axial portion in the stationary shaft and a radial portion, a compressed air inlet recess in the inner wall surface of a shaft sliding hole, and a supply outlet extending forward from the forward end of the compressed air inlet recess and communicating with a portion between the first and second pistons.Type: GrantFiled: July 11, 2006Date of Patent: March 16, 2010Assignee: Nitto Kohki Co., Ltd.Inventors: Kuniaki Shibuya, Munenori Yamaguchi, Yasumasa Suzuki, Takashi Nakajoh
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Publication number: 20090107690Abstract: The invention of this application provides a pneumatic tool with a simple structure. The tool has a tubular housing (50), a stationary shaft (52), a first piston (56) slidable along the stationary shaft, a second piston (58), a tool attachment member (60) drivingly connected to the second piston, a compressed air supply path (70) extending through the stationary shaft to supply compressed air between the first and second pistons, and an air discharge path (76) for discharging the compressed air supplied between the first and second pistons to the outside of the housing when the first and second pistons are separated by a predetermined distance. The compressed air supply path has an axial portion (70a) in the stationary shaft and a radial portion (70b), a compressed air inlet recess (70c) in the inner wall surface of a shaft sliding hole, and a supply outlet (70d) extending forward from the forward end of the compressed air inlet recess and communicating with a portion between the first and second pistons.Type: ApplicationFiled: July 11, 2006Publication date: April 30, 2009Applicant: NITTO KOHKI CO., LTD.Inventors: Kuniaki Shibuya, Munenori Yamaguchi, Yasumasa Suzuki, Takashi Nakajoh
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Patent number: 7121773Abstract: An electric drill apparatus having a low profile is provided which comprises an annular cutter, a motor for rotating the annular cutter, a rotary shaft assembly for rotating the annular cutter attached to its leading end about a rotating, a rotation reduction mechanism disposed between the motor and rotary shaft assembly for transmitting a driving force of the motor to the annular cutter through the rotary shaft assembly, a feed mechanism responsive to an operation of a manual handle, for moving the rotary shaft assembly along with a straight line to advance or retract the annular cutter attached to the rotary shaft assembly with respect to a workpiece, and an adhesion base for securing the electric drill apparatus to the workpiece. The annular cutter has a plurality of cutting blades comprised of cemented carbide tips fixed on its lower end, thereby it is capable of rotating at a high speed.Type: GrantFiled: September 29, 2003Date of Patent: October 17, 2006Assignee: Nitto Kohki Co., Ltd.Inventors: Toshio Mikiya, Keisuke Shimada, Munenori Yamaguchi, Takashi Chiba, Kenji Ohtsuka
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Patent number: 7001117Abstract: A rotary cutting apparatus comprises a rotary shaft assembly having an axis and adapted to hold a cutting tool coaxial with the axis and, a feed mechanism for moving the cutting tool held by the rotary shaft assembly along the axis of the rotary shaft assembly. The rotary shaft assembly comprises a proximal rotary shaft, an intermediate, a distal rotary shaft which are successively telescopically connected, and a cylindrical housing rotatably holding the distal rotary shaft and movable along the axis together with the distal rotary shaft. The feed mechanism comprises a first rack mounted on the cylindrical housing and extending in parallel with the axis of the rotary shaft assembly, a second rack securely mounted on the body in parallel with the first rack; and, a pinion positioned between and engaged with the first and second racks.Type: GrantFiled: September 10, 2003Date of Patent: February 21, 2006Assignee: Nitto Kohki Co., Ltd.Inventors: Toshio Mikiya, Keisuke Shimada, Takashi Chiba, Munenori Yamaguchi, Kenji Ohtsuka
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Publication number: 20050025586Abstract: An electric drill apparatus having a low profile is provided which comprises an annular cutter, a motor for rotating the annular cutter, a rotary shaft assembly for rotating the annular cutter attached to its leading end about a rotating, a rotation reduction mechanism disposed between the motor and rotary shaft assembly for transmitting a driving force of the motor to the annular cutter through the rotary shaft assembly, a feed mechanism responsive to an operation of a manual handle, for moving the rotary shaft assembly along with a straight line to advance or retract the annular cutter attached to the rotary shaft assembly with respect to a workpiece, and an adhesion base for securing the electric drill apparatus to the workpiece. The annular cutter has a plurality of cutting blades comprised of cemented carbide tips fixed on its lower end, thereby it is capable of rotating at a high speed.Type: ApplicationFiled: September 29, 2003Publication date: February 3, 2005Inventors: Toshio Mikiya, Keisuke Shimada, Munenori Yamaguchi, Takashi Chiba, Kenji Ohtsuka
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Publication number: 20040191018Abstract: A rotary cutting apparatus comprises a rotary shaft assembly having an axis and adapted to hold a cutting tool coaxial with the axis and, a feed mechanism for moving the cutting tool held by the rotary shaft assembly along the axis of the rotary shaft assembly. The rotary shaft assembly comprises a proximal rotary shaft, an intermediate, a distal rotary shaft which are successively telescopically connected, and a cylindrical housing rotatably holding the distal rotary shaft and movable along the axis together with the distal rotary shaft. The feed mechanism comprises a first rack mounted on the cylindrical housing and extending in parallel with the axis of the rotary shaft assembly, a second rack securely mounted on the body in parallel with the first rack; and, a pinion positioned between and engaged with the first and second racks.Type: ApplicationFiled: September 10, 2003Publication date: September 30, 2004Applicant: Nitto Kohki Co., Ltd.Inventors: Toshio Mikiya, Keisuke Shimada, Takashi Chiba, Munenori Yamaguchi, Kenji Ohtsuka
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Patent number: 6042311Abstract: A chamfering apparatus for chamfering a work has an adapter which surrounds a tool support, has one end fixed to a casing and the other end projecting from the casing, and is arranged coaxially with the axis of a rotating shaft. This chamfering apparatus includes an eccentric ring rotatably mounted around the adapter, a lock plate rotatably mounted around the eccentric ring, a work guide attached to the lock plate and having a predetermined guide direction to guide a tool support along the work, and keeping means for keeping the angle between the guide direction of the work guide and the output shaft of a motor at a predetermined value when the lock plate and the work guide are translated with respect to the axis of the rotating shaft by rotating the eccentric ring with respect to the adapter.Type: GrantFiled: March 26, 1999Date of Patent: March 28, 2000Assignee: Nitto Kohki Co., Ltd.Inventors: Toshiki Yokoyama, Munenori Yamaguchi, Yasuo Kazama
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Patent number: D384870Type: GrantFiled: August 7, 1996Date of Patent: October 14, 1997Assignee: Nitto Kohki Co., Ltd.Inventor: Munenori Yamaguchi