Oppama Industry Co., Ltd

Oppama Kogyo Kabushiki Kaisha

Other

Kioritz Corporation

Yamabiko Corporation

Yamibiko Corporation

Masao Iwata

Kiyoshige Enomoto

Yoshiki Kitamura

Yoshiaki Hironaka

Norio Kawai

Shigeyuki Suzuki

Toshiyuki Takano

Shigeo Take

Shunsuke Nakamura

Takuo Yoshizaki

Hiroshi Nakata

Fumitake Matsuda

Atsushi Kawahara

Hiromi Watanabe

Michiyasu Kuwano

Kazuhiro Yoneyama

Yuichi Tsuyuki

Kohsuke Watanabe

Naoto Kawahara

Yoshinori Ishikawa

Shigeru Ohtake

An engine-driven working machine including a controller by which a time period until the rotation speed limitation mode is canceled can be shortened. After a throttle valve is moved to a fully-closed position by an operation to allow the engine to finish the fast idling state and while the engine is transited to an idling state, the controller cancels the rotation speed limitation mode by detecting an event in which a cycle period of rotation speed variations of the engine is longer than a cycle period of rotation speed variation in the fast idling state.

Engine driven working machine

Problems: For enhanced safety of a work apparatus with an internal combustion engine, a cutting element is prevented from an accidental run due to an accidental increase of the engine revolution while a throttle control trigger is in a released state. Solution: In an engine start period, a throttle valve () is in a first idling position. The engineat its initial run phase does not increase in revolution because of instability of its running condition. When the running condition begins to stabilize, the revolution rapidly increases. When the engine revolution (Ne) reaches 4,000 rpm or higher, a non-firing control mode is set up. In the non-firing control mode, when the engine revolution reaches or exceeds 4,500 rpm, a non-firing processing is executed (S). A centrifugal clutch () is designed to engage at 5,000 rpm.

Work apparatus with internal combustion engine

A no-contact ignition control device includes a stop switch which maintains a second switching element at the OFF state so that an induced voltage of a trigger coil triggers a first switching element and shortcircuit a generation coil. A surge absorption element is connected in parallel to the stop switch. This configuration prevents intrusion of a surge current into the ignition control circuit caused by static electricity accumulated on the surface of casing covering electronic parts of the ignition control circuit and surely avoid dielectric breakdown of the electronic parts or malfunction of the circuit by the surge current.

Non-contact ignition control device of internal combustion engine

A level adjusting circuit which adjusts input pulses from an antenna to a level suitable for determining the number of engine revolutions, is connected in a circuit that connects the antenna with a determining circuit. An optimum adjustment of the determination level by manual operation allows the pulses inputted to the determining circuit to be precisely determined at all times.

Engine rotating meter

An ignition timing measuring and display device of an internal combustion engine () having a magneto (A) includes a reference RPM signal pulse detector () for detecting a reference RPM signal pulse of the internal combustion engine () and an ignition noise pulse detector () for detecting ignition noise of an electromagnetic wave generated in the vicinity of an ignition plug () when ignition is carried out in the internal combustion engine () and calculates ignition timing generated by the magneto (A) based on the signal pulse and the ignition noise pulse and displays it. Since the ignition timing of the internal combustion engine can be easily monitored, maintenance can be carried out to the internal combustion engine and an ignition device to realize a necessary operating performance of the internal combustion engine.

Ignition timing measuring and display device of internal combustion engine

A rotor core, rotating in the vicinity of a generating coil, comprises a balance weight section and a pair of magnetic poles, provided on opposite sides of the balance weight sectionwith respect to a center of rotation O of the rotor coreto sandwich a magnet, and confronting through a magnetic gap G. A magnet holding sectionfor preventing the magnetflying out through the magnetic gap G due to centrifugal force, is provided integrally contiguous to each of the magnetic poles so as to connect between the two magnetic poles.

Magneto rotor

A fuel injection device mounted on a main body of an air-fuel mixture generating device including an electromagnetic driving-type fuel injection valve for injecting, at predetermined times, fuel into an air-intake passageway of an intake system of an internal combustion engine, and a collision plate operationally coupled to the fuel injection valve adapted to be disposed in the air-intake passageway for enabling the injected fuel to collide therewith.

Fuel injection device and air-fuel mixture generating device provided with fuel injection device

A contactless ignition system is provided with an ignition charge discharge condenser for charging an induced voltage of a generating coil, a first switching element, triggered to conduct when an induced voltage of a trigger coil reaches an initial trigger level, for supplying a voltage charged into the ignition charge discharge condenser into an ignition coil, and a trigger control condenser for charging induced voltages of the generating coil and the trigger coil, and triggering of the first switching element caused by an induced voltage of the trigger coil is inhibited by a second switching element during a specified discharge time following charging of the trigger control condenser.

Contactless ignition system for internal combustion engine

A power supply apparatus for electrostatic charging sprayed liquids from a spraying apparatus and method for same, the apparatus including a rotor having a magnet and magnetic poles, a booster coil assembly facing the rotor, for inducing high voltage AC pulses during the rotation of the rotor, and a rectifier for rectifying the high voltage AC pulses induced by the booster coil assembly to high voltage DC pulses and for supplying the high voltage DC pulses to a charging electrode. The power supply apparatus provides a compact and lightweight power generator system, thus eliminating cumbersome operations such as replacement or recharging of a large battery. In addition, a lighter weight and simplified operation reduces the burden on users and facilitates more efficient spraying.

Power supply apparatus for electrostatic charging and method for same

By inserting a male screw for fixing a ratchet claw into a nut placed on an insert core and the like to prevent rotation, it is possible to eliminate additional screw processing on the insert core, to increase magnetic resistance between a magnet and the insert core provided with the former, to concentrate irradiation of magnetic flux from the second magnet pole toward outside and to fix the magnet and the second magnet pole onto the insert core with screws. Further, by tapering an axial hole of the rotor, it is possible to easily and accurately attach the insert core or the rotor to a crankshaft. Furthermore, by inserting a removal parts of a removal tool into a perforation hole of the rotor, it is possible to realize quick and simple removal of the rotor from the crankshaft.

Magneto electric generator rotor and an implement for removing this rotor

In an electrostatic sprayer, a pulsating voltage developed using a battery or a generator as a power supply is stepped up using a step-up transformer. A resultant high-voltage pulse is rectified and applied to an electrostatic electrode. A spray jetted from a spray nozzle is thus electrified. Herein, the step-up transformer is located near the spray nozzle. Owing to this structure, a high voltage produced by the step-up transformer can be applied to the electrostatic electrode with a loss minimized.

Electrostatic sprayer

A rotor core is provided with a pole piece portion holding a magnet and a balance weight portion, wherein said hub fitting hole is inserted a metal hub having a tapered axis hole and part fitting portion so as to be fixed each other, and said rotor core is coated with synthetic resins, thereby the use of metal can be limited only to parts where mechanical strength is required so that the whole rotor weight can be reduced and can be assembled easily, and be allow various parts can be fitted stably, and the degradation of magnetic properties of the magnet can be prevented.

Rotor of rotating equipment

The operation of a machine, varying with time, is sensed and the signals fed to a micro-computer for processing. The processed signals are stored, varying with time. The stored signals are transmitted to an external computer having display means to display the data, the remaining memory capacity and the holding memory of the storage switches are provided to switch mode of storage of the data, transmission of the data or display.

Growing community of inventors

Yokosuka, Japan

Masao Iwata