Abstract: An edger having a main frame, at least one front wheel fastened in the front portion of the main frame, two rear wheels fastened in the rear portion of the main frame, a rotary blade disposed in the front portion of either side of the main frame and capable of conducting edging, an engine mounted on the main frame and a driving device for operating the rotary blade with the engine, the edger comprising: a supporting arm for supporting the rear wheel positioned opposite to the rotary blade in such a manner that the position of the rear wheel positioned opposite to the rotary blade can be vertically adjusted with respect to the main frame; and a positioning mechanism for positioning the vertical position of the rear wheel disposed between the main frame and the supporting arm.

Abstract: An edger having a driving device for operating a rotary blade, the driving device including a driving pulley; a pulley to be driven; a driving belt arranged between the two pulleys; a swing arm having the center of its swinging motion at a position different from the center of rotation of the driving pulley; a rod slidably supported by the swing arm and supporting the pulley to be driven; a spring for urging the rod in a direction in which the distance between the shafts of the two pulleys is elongated; a drive-side pulley cover and a driven-side pulley cover.

Abstract: An edger having a main frame, at least one front wheel fastened in the front portion of the main frame, two rear wheels fastened in the rear portion of the main frame, a rotary blade disposed in the front portion of either side of the main frame and capable of conducting edging, an engine mounted on the main frame and a driving device for operating the rotary blade with the engine, the edger comprising: a resin cover fastened to a circular flange on the rotary-blade supporting shaft for covering a portion of the rotary blade. A structure for fitting the rotary blade cover includes a thin metal plate having an outer diameter larger than the flange, and fastening members for clamping the inner portion of the cover between the flange and the thin metal plate. Bolt assemblies are provided for fastening the thin metal plate and the cover together at a position outside the flange.

Abstract: An edger is provided having a main frame, at least one front wheel fastened in the front portion of the main frame, two rear wheels fastened in the rear portion of the main frame, a rotary blade disposed in the front portion on either side of the main frame and capable of conducting edging, an engine mounted on the main frame and a driving device for operating the rotary blade with the engine, a supporting arm pivotally connected at its upper end to the main frame and rotatably supporting at its lower end the rear wheel positioned opposite to the rotary blade in such a manner that the position of the rear wheel can be vertically adjusted with respect to the main frame, and a positioning mechanism for physically positioning the vertical position of the rear wheel disposed between the main frame and the supporting arm, the positioning mechanism comprising a securing portion formed in either the main frame or the supporting arm, a securing arm having a plurality of securing steps which can be secured to the secu

Abstract: An edger having a main frame, at least one front wheel fastened in the front portion of the main frame, two rear wheels fastened in the rear portion of the main frame, a rotary blade disposed in the front portion of either side of the main frame and capable of conducting edging, an engine mounted on the main frame and a driving device for operating the rotary blade with the engine, the edger comprising:an operating lever assembly including a first and second lever for controlling the operating position of the rotary blade. The first lever includes a portion to be gripped during operation of the edger, and the second lever includes a position setting mechanism. Both levers are operatively connected together and control the rotary blade via a connection device.

Abstract: An edger having a main frame, at least one front wheel fastened in the front portion of the main frame, two rear wheels fastened in the rear portion of the main fame, a rotary blade disposed in the front portion of either side of the main frame and capable of conducting edging, an engine mounted on the main frame and a driving device for operating the rotary blade with the engine, the edger comprising: a supporting arm for supporting the rear wheel positioned opposite to the rotary blade in such a manner that the position of the rear wheel positioned opposite to the rotary blade can be vertically adjusted with respect to the main frame; and a positioning mechanism for positioning the vertical position of the rear wheel disposed between the main frame and the supporting arm.

Abstract: The present invention relates to an edger with a belt braking device, including a belt driving device and a cutter blade, which are arranged at the side of an edger vehicle. A bearing housing portion of the cutter blade is provided for forward and rearward movement, a belt cover for covering the whole driving belt is fixed to the edger vehicle, and a belt braking device is arranged between the front end of the belt cover and the front driven pulley, whereby performing ON-OFF operation of a clutch and engagement/ disengagement of a brake simultaneously is enabled. In this way, the fixed belt cover can be compact and the operation for changing of working conditions can be simplified.

Abstract: The present invention provides an edger wherein a cutter device is arranged on one side of an edger frame, the position of a front wheel is adjustable, the position of one of the rear wheels situated on the other side of the edger frame is also adjustable, and a mechanism for changing the position of the front wheel as well as changing the position of the rear wheel is performed by a single control lever at the operator's station. With this arrangement, the adjustment of the depth of the cutter and the adjustment for maintaining the edger in a horizontal condition when the edger is driven on a curbstone can be easily effected by the operator.

Abstract: Muffler apparatus including an elongated muffler which is connectable to an engine body via two exhaust pipes. The muffler includes a first expansion chamber which extends along the entire length of the muffler, and the two exhaust pipes are connected separately adjacent opposite ends, or in the vicinity of the ends, of the muffler on the side of the muffler at which the first expansion chamber is located.

Abstract: An improved work vehicle is disclosed in which a vertical shaft V-type engine having vertically supported crankshaft with the pair of right and left cylinders being arranged in V-shape is housed inside the front bonnet that is forwardly downwardly inclined at the top. The work vehicle, while having no less excellent performance in terms of power output, noise, and vibration, provides more increased operability and a wider range of forward visibility than conventional horizontal opposed type engine vehicles.

Abstract: A valve gear adapted for a four-cycle engine. Provided are a groove having such a shape folding around a crank shaft with an intersection as to return back to a starting point in two turns, a cam formed on top faces of both banks of aforesaid groove, a tappet arm projecting sideways from a tappet and elastically engaged with aforesaid cam, and a slider supported by aforesaid tappet arm and slidably fitted into aforesaid groove, and aforesaid tappet arm is guided by aforesaid slider to be given a lift by aforesaid cam provided on the outer circumference of the crank shaft.

Abstract: Disclosed is a valve gear for use in a four-cycle engine which eliminates the necessity of providing a cam shaft. In the valve gear, a guide or guides, each of which is shaped like a closed curve making two rounds of a crank shaft with one intersection on the way, are provided. An air-intake valve and/or exhaust valve are controlled in accordance with the movement of a slider member sliding along the guide or guides.

Abstract: A valve gear adapted for the four-cycle engine comprises guide portions(s) which is formed on the end surface(s) of crankweb(s) of a crankshaft, and has such a shape folding around the crankshaft with an intersection as to return back to a starting point in two turns; and two interlocking mechanisms provided between the guide portion(s) and the intake and exhaust valves in the engine to open the valves by being guided by the guide portion(s).

Abstract: A valve gear adapted for a four-cycle engine having a guide portion formed on the outer surface of an output shaft connected to a crankshaft, and of such a shape folding around the output shaft as to return back to a starting point in two turns, and having interlocking mechanisms provided with portions engaging with the guide portion and moved by the rotation of the crankshaft to open valves. The guide portion, only one in number, is provided on the output shaft connected to the crankshaft, and the interlocking mechanisms for driving intake and exhaust valves are disposed substantially opposite to each other across the output shaft as to engage with aforesaid single guide portion.

Abstract: A valve system for the overhead valve type four-cycle engine disposing the intake and exhaust valves substantially symmetrically to each other with respect to the cylinder center line, wherein the valve stems are so tilted in the cylinder head that the valve bodies are in juxtaposition close to the cylinder center line. Guide cams are disposed around the circumferential surface of the crank shaft, respectively return back to the same starting point while making two turns, and respectively have one projection in the course of the turn, for driving the intake and exhaust valves. Between the guide cams and the respective intake and exhaust valve, a sliding piece, push rod and rocker arm are provided, and the projection on each of aforesaid cam is designed to be placed at such a position as to engage with the sliding piece to the opening timing of the intake and exhaust valves.

Abstract: Disclosed is a valve gear for use in a four-cycle engine which eliminates the necessity of providing a cam shaft. In the valve gear, a guide or guides, each of which is shaped like a closed curve making two rounds of a crank shaft with one intersection on the way, are provided. An air-intake valve and/or exhaust valve are controlled in accordance with the movement of a slider member sliding along the guide or guides.

Abstract: A vertical shaft V-type engine having a vertical crankshaft and a pair of right and left hand cylinders arranged in V-shape, the engine comprising a carburetor arranged within a V-bank defined between both cylinders and an air cleaner arranged upwardly of the carburetor. The engine is also provided with an air fan and the air cleaner is arranged adjacent to a fan housing of the air fan.

Abstract: An engine balancing system for a single-cylinder engine including a single primary balancer and a counterbalancer for reducing rotational vibration, wherein the single primary balancer has an axis of rotation disposed parallel to a crank shaft of the engine and is driven at the same velocity as the crank shaft in a direction opposite to the direction of rotation of the crank shaft. A cylinder of the engine has a center line which deviates from the center axis of the crank shaft and is displaced toward the single primary balancer.

Abstract: An integrated fuel control system for a gasoline engine including a linkage composed of a plurality of pivotable members which enables an operator to effect control of the choking condition of the gasoline engine and the magnitude of its power satisfactorily through a single operating element.