| Patent Number |
Title Of Patent |
Date Issued |
| RE32629 |
Mowing machine with annular inertia shifter |
March 29, 1988 |
| A mowing machine is provided with its cutting head employing one or more flexible cutting lines such as Nylon cords which serve to cut grasses during rotation of the cutting head. The free end portions of the cutting lines extend radially outwardly from a casing through openings in an |
| H885 |
Bearing device for a crankshaft |
February 5, 1991 |
| 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 |
| H749 |
Oil seal |
March 6, 1990 |
| An oil seal disposed between a device having a rotary shaft and the rotary shaft. The oil seal comprises an annular supporting member supported within the fixed structure of the device and an annular elastic sealing member disposed in contact with the outer peripheral surface of the rota |
| H612 |
Mowing apparatus |
April 4, 1989 |
| A mowing apparatus including a casing containing a cord and operative to rotate while an end portion of the cord is drawn out therefrom. The casing is formed with a cord outlet opening in the form of a slot having a major axis oriented in the direction of rotation of the casing. |
| H517 |
Recoil starter device |
September 6, 1988 |
| A recoil starter device for starting an internal combustion engine has a recoil case attached at its one end to a portion of the internal combustion engine and opened at its other end, a shaft having one end rotatably supported by and extended through a wall of the recoil case and th |
| H380 |
Trimmer |
December 1, 1987 |
| A trimmer including a flexible shaft extending through a hollow straight operation rod for transmitting driving power from a prime mover to a gear chamber. A clearance is defined between an inner wall surface of the hollow operation rod and an outer peripheral surface of the flexible |
| H378 |
Spiked bumper |
December 1, 1987 |
| A spiked-bumper mounted to a forward end portion of a main body of a chain saw includes a reference mounting hole formed at one longitudinal end portion of the spiked-bumper, and mounting adjusting holes formed at a longitudinal opposite end portion of the spiked-bumper in positions |
| H294 |
Saw chain guide device for chain saw |
July 7, 1987 |
| A saw chain guide device for a chain saw in which an end face of each of side plates disposed adjacent to a drive sprocket of the saw chain terminates extremely adjacent to a tooth tip circle of the drive sprocket of the saw chain, and an edge portion extending beyond the end face and |
| D522532 |
Internal combustion engine |
June 6, 2006 |
|
| D521528 |
Internal combustion engine |
May 23, 2006 |
|
| D346049 |
Body of power blower |
April 12, 1994 |
|
| D325155 |
Power chainsaw motor housing |
April 7, 1992 |
|
| D302779 |
Cord cutter head for a vegetation trimmer |
August 15, 1989 |
|
| D298039 |
Lawn mower housing |
October 11, 1988 |
|
| D295713 |
Power chainsaw motor housing |
May 17, 1988 |
|
| D286927 |
Power blower sweeper |
November 25, 1986 |
|
| D285848 |
Power blower sweeper |
September 23, 1986 |
|
| D284862 |
Internal combustion engine |
July 29, 1986 |
|
| D268089 |
Chain saw |
March 1, 1983 |
|
| D266587 |
Power blower |
October 19, 1982 |
|
| D264675 |
Blade for power scythe |
June 1, 1982 |
|
| D264042 |
Blade for power scythe |
April 27, 1982 |
|
| D258908 |
Power blower |
April 14, 1981 |
|
| D250745 |
Power scythe |
January 9, 1979 |
|
| 7363886 |
Power unit |
April 29, 2008 |
| To achieve improved cooling in a power unit, a first fan is coupled with an end of a crankshaft of an internal combustion engine to cool at least a cylinder of the internal combustion engine, and a second fan is coupled with another end of the crankshaft to cool at least the cylinder. Th |
| 7322322 |
Stratified-scavenging two-stroke internal combustion engine |
January 29, 2008 |
| In a stratified-scavenging two-stroke internal combustion engine, air-fuel mixture outlets (14b) and air outlets (15b) are provided on either side of a cylinder (3), and the air-fuel mixture outlets (14b) and the air outlets (15b) communicate with a crank chamber (6) via air-fuel mixture |
| 7322114 |
Saw chain tensioning mechanism |
January 29, 2008 |
| A saw chain tensioning mechanism for adjusting the tension in a saw chain extending around a chain guide plate includes a threaded rod member disposed adjacent to a rear end of the chain guide plate and along the longitudinal direction of the chain guide plate, a movable member engaged |
| 7255072 |
Two-stroke internal combustion engine |
August 14, 2007 |
| In a two-stroke internal combustion engine (1) using an internal cooling piston (2), the piston (2) has in-piston scavenging passages (19) defined therein by partition walls (18), and lower-end inlets (20) of the in-piston scavenging passages (19) are opened downward and narrowed in |
| 7243622 |
Two-stroke internal combustion engine |
July 17, 2007 |
| A two-stroke internal combustion engine (1) includes one pair or two pairs of scavenging passageways (31, 32) of reverse flow system where scavenging outlet ports (31b, 32b) are opened to the cylinder bore (10a); the internal combustion engine being characterized in that an external |
| 7182059 |
Oil pump mechanism for lubricating saw chain |
February 27, 2007 |
| An oil pump mechanism is incorporated in a chain saw having a centrifugal clutch and a saw chain adapted to be driven through the centrifugal clutch and activated in synchronization with the centrifugal clutch to supply a lubricating oil to the saw chain. The mechanism includes a cra |
| 7165597 |
Insert core and method for manufacturing a cylinder for internal combustion engine by making use |
January 23, 2007 |
| There is provided a method of cast molding a cylinder for an internal combustion engine by making use of an insert core, which makes it possible to rationally form the chamfered portions at the rim portion, on the cylinder bore side, of the scavenging ports, the suction port and the |
| 7101295 |
Power transmission device and portable power working machine provided with the same |
September 5, 2006 |
| A power transmission device is disclosed which is capable of easily, swiftly and appropriately altering the distance between the axes of a pair of transmission wheels such as pulleys, enabling an endless belt to be kept under constant and appropriate tension without necessitating a t |
| 7086837 |
Centrifugal blower fan |
August 8, 2006 |
| It is the object of the present invention to provide a centrifugal blower fan capable of reducing a noise in an operating rotational speed range without degradation in blawer performance. A centrifugal blower fan comprises a base plate, and a plurality of fan blades arranged on the b |
| 7063061 |
Liquid quantity visual confirmation device and reservoir-forming member |
June 20, 2006 |
| A liquid quantity visual confirmation device comprises a first reservoir-forming member, and a second reservoir-forming member forming a liquid reservoir in combination with the first reservoir-forming member. The second reservoir-forming member is at least partially transparent to a |
| 7055213 |
Power blower having a debris-catching cover |
June 6, 2006 |
| A power blower includes a frame, and a blower mounted on the frame. An air intake port of the blower faces the frame. There is provided an air intake space between the blower and the frame. A debris-catching cover is constructed between the frame side and the blower side in a state in |
| 7011078 |
Two-stroke internal combustion engine |
March 14, 2006 |
| A two-stroke internal combustion engine (1) is provided with one pair or plural pairs of C-shaped scavenging passageways (31, 32) of a reverse flow system where scavenging inlet ports (31a) as well as scavenging outlet ports (31b, 32b) are both opened to a cylinder bore (10a), wherein |
| 7007660 |
Portable power working machine |
March 7, 2006 |
| A portable power working machine is disclosed, which is capable of effectively minimizing the clogging of the air cleaner, thereby dispensing with frequent maintenance. This portable power working machine comprises an air cleaner (30) having a base body case (32) provided with a clea |
| 6994070 |
Portable air blowing working machine |
February 7, 2006 |
| There is provided a portable air blowing working machine capable of obviating frequent operation for the maintenance of air cleaner and hence capable of improving working efficiency. This working machine includes an internal combustion engine having the air cleaner disposed in the ai |
| 6925970 |
Air-cooled four-stroke internal combustion engine |
August 9, 2005 |
| The present invention provides an air-cooled four-stroke internal combustion engine capable of achieving a high degree of cooling. The present invention is directed to an air-cooled four-stroke internal combustion engine including a crankshaft and a fan rotor rotatably driven by the |
| 6918451 |
Brake band and portable trimmer |
July 19, 2005 |
| The present invention relates to a brake band for use with a centrifugal clutch. The brake band is formed in a curved strip shape to be disposed along the outer peripheral surface of a clutch drum of the centrifugal clutch, and is adapted to be tightened around or released from the outer |
| 6901900 |
Recoil starter for backpack type power working machine |
June 7, 2005 |
| A recoil starter for a backpack type power working machine, which is capable of easily performing the starting operation of an internal combustion engine with the working machine being carried on the operator's back. In this recoil starter, the recoil rope and the recoil handle are d |
| 6899158 |
Insert core and method for manufacturing a cylinder for internal combustion engine by making use |
May 31, 2005 |
| There is provided a method for manufacturing a cylinder for an internal combustion engine by making use of an insert core, which makes it possible to manufacture the cylinder by a die casting method such as a high-pressure die casting method at low cost and in high accuracy. The inse |
| 6886520 |
Cylinder for internal combustion engine and method of treating inner surface of the cylinder |
May 3, 2005 |
| A cylinder for an internal combustion engine and a method for treating the inner surface of the cylinder, which enables the inner surface constituting a piston-sliding surface of the cylinder to have a high quality plated layer which is uniform in thickness and smooth in surface at l |
| 6857413 |
Power working machine with internal combustion engine having spark plug |
February 22, 2005 |
| A spark plug guard can be switched between a spark-plug covering position to protect a spark plug and a spark-plug opening position. An operator displaces the spark plug guard from the spark-plug covering position to the spark-plug opening position, thereby obtaining a wide working space |
| 6857163 |
Power blower having a debris-catching filter member |
February 22, 2005 |
| A power blower having a frame, a blower, and a loop-shaped filter member. In an embodiment of the invention, the blower is disposed apart from the frame by an air intake space and has an air intake port facing the frame, and the loop-shaped filter member is disposed around a periphery of |
| 6840207 |
Recoil starter for backpack-type power working machine |
January 11, 2005 |
| A recoil starter for a backpack-type power working machine which is capable of easily and smoothly performed the starting operation even when the working machine is kept on the operator's back irrespective of differences in the operator's build. This recoil starter comprises a recoil gri |
| 6807954 |
Portable power working machine |
October 26, 2004 |
| There is provided a portable power working machine, which is capable of rationally and effectively preventing the generation of the icing without giving rise to early clogging of air cleaner, the malfunction of a internal combustion engine and deterioration of performance. This working |
| 6805531 |
Set of split bodies for forming blower fan through hollow-article injection molding process |
October 19, 2004 |
| A set of split bodies for forming a synthetic-resin blower fan through a hollow-article injection molding process, wherein the blower fan integrally includes a circular base, a cover portion having an air inlet opening at the center thereof, and a plurality of blades. The set of split |
| 6802284 |
Fuel injection device and air-fuel mixture generating device provided with fuel injection device |
October 12, 2004 |
| 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 |
| 6786187 |
Internal combustion engine |
September 7, 2004 |
| An internal combustion engine capable of optimizing the amount of oil in the crank chamber with a simplified structure of lubrication system, in which a U-shaped oil reservoir is formed surrounding and adjacent to a crank chamber. At least one small hole is formed on a partition wall whi |
