Patents Assigned to Kioritz Corporation
  • Auto-carrying system
    Patent number: 5029665
    Abstract: An auto-carrying system has a self-propelled vehicle and a mobile carrier capable of carrying the vehicle such that the vehicle can run onto and off the carrier. Sensor actuating poles are arranged along the path of movement of the carrier, while sensors capable of generating signals for controlling the running of the vehicle are carried by the vehicle such that they can engage with the sensor actuating poles during the movement of the carrier so as to control the running operation of the vehicle.
    Type: Grant
    Filed: January 10, 1990
    Date of Patent: July 9, 1991
    Assignee: Kioritz Corporation
    Inventor: Nori Harada
  • Chain saw
    Patent number: 5029561
    Abstract: A chain saw provided an internal combustion engine having a recoil-type starter. The chain saw has a step provided on the machine frame of the chain saw and adapted to be stepped down by at least a portion of the user's foot when the user operates the starter for starting the engine.
    Type: Grant
    Filed: May 3, 1990
    Date of Patent: July 9, 1991
    Assignee: Kioritz Corporation
    Inventor: Hiroaki Koga
  • Power work-machine
    Patent number: 5014835
    Abstract: A power work-machine having a clutch drum of a centrifugal clutch provided on one end of the output shaft has a plurality of peripheral notches formed on its axially extended outer end portion and a dog clutch provided on the drive shaft of a work-machine attachment has clutch claws engaging with the individual peripheral notches.
    Type: Grant
    Filed: April 6, 1990
    Date of Patent: May 14, 1991
    Assignee: Kioritz Corporation
    Inventors: Akira Nagashima, Hiroaki Koga
  • 2-cycle uni-flow spark-ignition engine
    Patent number: 4995350
    Abstract: A 2-cycle uni-flow spark-ignition engine has an annular scavenging chamber which is communicated with a crank chamber and which is connected to scavenging ports which are opened in an end period of downward stroking of a piston. A fluid introduced into the crank chamber is pre-compressed by the downward stroking of the engine and is discharged into a cylinder chamber through the annular scavenging chamber and the scavenging ports to form a uni-flow of scavenging fluid with a swirl above the piston. The engine has an exhaust valve provided on a cylinder head and normally opened by being driven with a predetermined force exerted by driving coiled spring towards the inside of the cylinder chamber.
    Type: Grant
    Filed: September 12, 1989
    Date of Patent: February 26, 1991
    Assignee: Kioritz Corporation
    Inventors: Seiichiro Kumagai, Michikata Kono, Masakazu Okai, Hisashi Inaga
  • Flywheel mounting device for internal combustion engine
    Patent number: 4993865
    Abstract: Disclosed is a flywheel mounting device for an internal combustion engine in which a keyway extends along the tapered surface of a flywheel in the axial direction from the small diameter end portion thereof and terminates at an intermediate portion thereof, so that the tapered surfaces of the crank shaft and the flywheel are closely fitted together over the entire periphery thereof at the large diameter end portions thereof.
    Type: Grant
    Filed: April 22, 1987
    Date of Patent: February 19, 1991
    Assignee: Kioritz Corporation
    Inventor: Akira Nagashima
  • Power working machine
    Patent number: 4979306
    Abstract: A power working machine having a main body case in which a prime mover is housed, a front handle and a rear handle which handles are gripped by the operator. The front handle has a flat cross-sectional shape reduced in thickness in a direction in which the front handle faces the main body case while being increased in width generally in the longitudinal direction of the machine body.
    Type: Grant
    Filed: January 5, 1990
    Date of Patent: December 25, 1990
    Assignee: Kioritz Corporation
    Inventors: Hiroaki Koga, Akira Nagashima
  • Two-stroke-cycle uniflow spark-ignition engine
    Patent number: 4977875
    Abstract: A two-stroke-cycle uniflow spark-ignition engine. A fluid sucked and pressurized by a compressor driven by the engine is delivered to an annular scavenging chamber formed in a cylinder around the entire circumference thereof, so as to be accumulated therein. The fluid within the annular scavenging chamber is discharged therefrom, through a plurality of scavenging ports formed in the cylinder and capable of opening into a cylinder chamber toward the end of a descending stroke of a piston, and/or into a recess which is above the piston, the discharged fluid serving as a scavenging fluid that flows generating a swirling uniflow. A mixture compressed within the cylinder chamber during an ascending stroke of the piston is ignited by an ignition plug for combustion.
    Type: Grant
    Filed: April 18, 1989
    Date of Patent: December 18, 1990
    Assignee: Kioritz Corporation
    Inventors: Seiichiro Kumagai, Michikata Kono, Masakazu Okai, Hisashi Inaga
  • Cover for rotary blade of power pruner
    Patent number: 4972586
    Abstract: A cover for a rotary blade of a power pruner having a grip portion connected to a transmission shaft for transmitting the torque of an internal combustion engine, and a rotary blade for pruning being disposed at the front end of the grip portion. The rotary blade cover has a cover portion facing at least a portion of a cutting edge of the rotary blade on the side of the grip portion and partially covering the upper and lower surfaces and the outer peripheral edge of the rotary blade so as to form a cavity in which a rotary air flow is formed.
    Type: Grant
    Filed: June 28, 1989
    Date of Patent: November 27, 1990
    Assignee: Kioritz Corporation
    Inventors: Isao Matsumoto, Tethumi Inomata
  • Method for producing cylinder having scavenging passages for two-cycle internal combustion engine
    Patent number: 4970769
    Abstract: A method for manufacturing a cylinder having scavenging passages for a two-cycle internal combustion engine is disclosed which comprises the steps of forming bulged portions protruded radially outwardly in a portion of a cylindrical liner, and surrounding the liner by casting through a high pressure diecast method, thereby form a main part of the cylinder.
    Type: Grant
    Filed: April 18, 1989
    Date of Patent: November 20, 1990
    Assignee: Kioritz Corporation
    Inventors: Hiroshi Iesato, Kazuyuki Nishiwaki, Kazumasa Okano, Isao Masuda, Akira Sageshima, Minoru Yonekawa
  • Piston for two-cycle internal combustion engine
    Patent number: 4964382
    Abstract: The present invention provides a piston for a two-cycle internal combustion engine in which a hole is disposed at a position upwardly remote from a lower end of a skirt portion, which position corresponds to a position of an inlet port.
    Type: Grant
    Filed: September 28, 1989
    Date of Patent: October 23, 1990
    Assignee: Kioritz Corporation
    Inventor: Satoru Kikuchi
  • Centrifugal clutch
    Patent number: 4960194
    Abstract: Disclosed is a centrifugal clutch of the type that includes a driving side member, a driven side member and a plurality of clutch shoes each having one end connected to the driving side member, the other end being capable of being friction-engaged with the driven side member, the driving side member and the clutch shoes being integrally formed using a high specific gravity resin type composite material.
    Type: Grant
    Filed: February 8, 1989
    Date of Patent: October 2, 1990
    Assignee: Kioritz Corporation
    Inventors: Akira Sageshima, Tadashi Ozaki, Hirozi Kawasaki, Isao Masuda
  • Connector tank means for cap for mouth of tank
    Patent number: 4958745
    Abstract: A connector for a cap applied to a mouth of a tank including an engaging member having an annular portion formed of elastic material connected to one end of an elongated portion, and a plurality of beam-like portions formed integrally with the annular portion and arranged substantially in the form of a letter V in the annular portion.
    Type: Grant
    Filed: July 2, 1987
    Date of Patent: September 25, 1990
    Assignee: Kioritz Corporation
    Inventors: Isao Masuda, Toshio Taomo, Fujio Sasaki
  • Portable work machine
    Patent number: 4953526
    Abstract: A portable work machine equipped with an internal combustion engine. A starting pressure reducing device is mounted on a cylinder of the engine for reducing, at starting of the engine, pressure within a combustion chamber defined in the cylinder. A hole is formed at a portion of an engine cover which is within reach of a finger of a hand holding a handle, and is closed by a flexible cap. An actuating portion of the starting pressure reducing device is disposed inside the cap.
    Type: Grant
    Filed: September 11, 1989
    Date of Patent: September 4, 1990
    Assignee: Kioritz Corporation
    Inventors: Yoshiaki Hironaka, Tatsuhiko Matsubayashi, Yoshikiyo Kamata, Takanobu Tasaki
  • Spring clutch
    Patent number: 4949826
    Abstract: A spring clutch where an input shaft and output shaft are connected and disconnected with each other through a coil spring. The coil spring is secured at one end to the output shaft and is freely disposed over the input shaft at its other end. A centrifugally responsive pawl is mounted to engage the coil spring at the end disposed about the input shaft when said input shaft is rotated at or above a predetermined speed to cause said coil to be wound and tightened about the coil spring, thereby connecting the input and output shaft.
    Type: Grant
    Filed: August 8, 1989
    Date of Patent: August 21, 1990
    Assignee: Kioritz Corporation
    Inventor: Masao Ohkanda
  • Oil seal
    Patent number: 4949981
    Abstract: An oil seal is disclosed in which an axially extending annular portion is formed at a radially inward edge of either one of a support member and a sealing member. An annular elastic sealing member extends from a free end of the axially extending portion in a radially inward direction and in an axial direction opposite to the extending direction of the axially extending portion, thus forming a sealing portion for sealing an outer circumferential surface of the rotary shaft.
    Type: Grant
    Filed: April 5, 1989
    Date of Patent: August 21, 1990
    Assignee: Kioritz Corporation
    Inventor: Akira Nagashima
  • Extendable/retractable operational sleeve
    Patent number: 4944711
    Abstract: An extendable/retractable operational sleeve is composed of a main sleeve portion and a movable sleeve portion movable in the axial direction in a telescopic manner relative to the main sleeve portion. A stop member for limiting outward separation of the movable sleeve portion of the operational sleeve is integrally formed with a bearing for supporting a main transmission shaft.
    Type: Grant
    Filed: February 22, 1989
    Date of Patent: July 31, 1990
    Assignee: Kioritz Corporation
    Inventors: Yoshiaki Hironaka, Isao Matsumoto
  • Centrifugal clutch
    Patent number: 4942952
    Abstract: A centrifugal clutch is disclosed in which a clutch boss rotatably supported to a drive side fixture has in its center an axial center hole. A clutch drum shaft has an inner end portion having an outer diameter somewhat smaller than an inner diameter of the center hole of the clutch boss. The inner end portion of the clutch drum shaft is arranged in the center hole of the clutch boss with a clearance. The driven side fixture and the drive side fixture are adjustable in relative position to each other.
    Type: Grant
    Filed: May 22, 1989
    Date of Patent: July 24, 1990
    Assignee: Kioritz Corporation
    Inventor: Yoshikiyo Kamata
  • Portable powered working machine
    Patent number: 4936271
    Abstract: A portable powered working machine such as a chain saw has a casing, a hollow grip formed integrally with the casing and extending from a front portion to a rear portion of the upper wall of the casing. An internal combustion engine is disposed in the casing such that its crankshaft extends transversely of the casing, the internal combustion engine having a cylinder arranged horizontally in a rear portion of the casing and a crankcase disposed in a front portion of the casing. A carburetor is disposed on a front side of the crankcase, while an air cleaner disposed in a rear portion of the grip. A communication pipe extends through the grip portion in the longitudinal direction thereof and connected between the air cleaner and the carburetor so as to form an air passage.
    Type: Grant
    Filed: June 9, 1989
    Date of Patent: June 26, 1990
    Assignee: Kioritz Corporation
    Inventors: Akira Nagashima, Hiroaki Koga, Tsutomu Ogata
  • Two-cycle internal combustion engine
    Patent number: 4934345
    Abstract: A two-cycle internal combustion engine comprising a cylinder including an exhaust outlet and scavenging paths formed in the inner wall thereof, and a piston including openings formed in its peripheral wall at positions near respective piston-pin bosses thereof, the respective upper ends of the scavenging paths serving as scavenging ports which are opened and closed through reciprocating movement of the piston and the openings being so arranged as to communicate with the scavenging paths at positions nearer to the exhaust outlet of the cylinder.
    Type: Grant
    Filed: May 15, 1989
    Date of Patent: June 19, 1990
    Assignee: Kioritz Corporation
    Inventors: Takashi Fukuoka, Mitsujiro Mochizuka, Masakuni Hiroshima
  • Bearing device for a crankshaft
    Patent number: H885
    Abstract: Disclosed is a bearing device for crankshaft wherein the cross sectional configuration of a ball-rolling groove of the inner race is so formed as to permit the ball-rolling groove to have a radius of curvature greater than the radius of the rolling ball, thereby to provide a clearance between the rolling ball and the ball-rolling groove permitting the rolling ball to be moved from one side to the other side of a central vertical line of the ball received by the outer race.
    Type: Grant
    Filed: November 14, 1985
    Date of Patent: February 5, 1991
    Assignee: Kioritz Corporation
    Inventor: Akira Nagashima