Abstract: 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 grip which is attached to a distal end portion of a recoil rope extended out of the main body of the recoil starter, wherein the recoil grip is designed such that it can be anchored to a recoil grip-supporting member to be positioned close to an operator's waist and that it can be pulled out in front of the operator from the recoil grip-supporting member. The recoil grip-supporting member is made optionally alterable in position.

Abstract: A recoil starter having a driving member and a driven member, wherein the driving member further includes recoiling unidirectional rotating means. The recoiling unidirectional rotating means includes a movable locking claw member which is supported by one of the rope reel and the interlocking rotor in such a manner that it is rotatable therewith and movable in a direction along the rotational axis thereof, an urging member for urging the movable locking claw member toward the other of the rope reel and the interlocking rotor, and an engaging member mounted on the other of the rope reel and the interlocking rotor.

Abstract: 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 grip which is attached to a distal end portion of a recoil rope extended out of the main body of the recoil starter, wherein the recoil grip is designed such that it can be anchored to a recoil grip-supporting member to be positioned close to an operator's waist and that it can be pulled out in front of the operator from the recoil grip-supporting member. The recoil grip-supporting member is made optionally alterable in position.

Abstract: A starter that is capable of minimizing fluctuations in the pulling force of a starter rope so as to make it possible to perform a smooth pulling operation when starting an internal combustion engine includes a driving section (A), a driven section (B), and a buffering/power-accumulating device (15) interposed between the driving section (A) and the driven section (B).

Abstract: A recoil starter having a driving member and a driven member, wherein the driving member further includes recoiling unidirectional rotating means. The recoiling unidirectional rotating means includes a movable locking claw member which is supported by one of the rope reel and the interlocking rotor in such a manner that it is rotatable therewith and movable in a direction along the rotational axis thereof, an urging member for urging the movable locking claw member toward the other of the rope reel and the interlocking rotor, and an engaging member mounted on the other of the rope reel and the interlocking rotor.

Abstract: A vacuum apparatus has a recessed portion which is provided at an appropriate position of a fan casing. When incoming materials frequently pass through the fan casing, the recessed portion wears more quickly than the rest of the inner surface of the fan casing. Hence, a user of the vacuum apparatus can easily know when to replace the fan casing by visually checking the recessed portion from outside the fan casing.

Abstract: A disk cleaner includes a polishing member which is adapted to be rotated while being engaged with a surface of the disk, thereby to polish the surface of the disk. The polishing member is disposed such that the rotational axis of the polishing member is kept perpendicular to the surface of the disk, thereby to cause the disk to rotate in one direction due to a frictional force between the polishing member and the surface of the disk. The rotational axis of the polishing member is spaced apart from a rotational axis of the disk in the radial direction of the disk, whereby only part of the polishing member engages the surface of the disk.

Abstract: A vacuum apparatus has a recessed portion which is provided at an appropriate position of a fan casing. When incoming materials frequently pass through the fan casing, the recessed portion wears more quickly than the rest of the inner surface of the fan casing. Hence, a user of the vacuum apparatus can easily know when to replace the fan casing by visually checking the recessed portion from outside the fan casing.

Abstract: A disk cleaner includes a polishing member which is adapted to be rotated while being engaged with a surface of the disk, thereby to polish the surface of the disk. The polishing member is disposed such that the rotational axis of the polishing member is kept perpendicular to the surface of the disk, thereby to cause the disk to rotate in one direction due to a frictional force between the polishing member and the surface of the disk. The rotational axis of the polishing member is spaced apart from a rotational axis of the disk in the radial direction of the disk, whereby only part of the polishing member engages the surface of the disk.

Abstract: A power working machine has a noise level display device which enables the noise level of the machine to be easily recognized with the naked eyes. When compressed air that is pressurized and delivered by a blower fan is delivered to an air-ejecting pipe, a noise level proportional to the magnitude of the force of the ejected air flow is indicated by the noise level display device, which is mounted on the air-ejecting pipe.

Abstract: For removing a scratch or stain from a surface of a disk such as a CD, a disk cleaner/scourer/polisher device has a scouring member such as a buff. The disk is rotated about its axis, and the buff is pressed against the surface of the disk and rotated also with the axis of rotation of the buff being perpendicular to the surface of the disk, scouring is uniform and does not impair surface flatness. Changing between scouring members, between scratch removal and polishing is facilitated by a lifting mechanism for selectively pressing the corresponding scouring member against the surface.

Abstract: A hand lever apparatus (throttle lever) (10) is provided which has an automatic restoring function (automatic idle rotation opening position restoring function) to cope with an accident and which can perform normal operation lightly and swiftly. The hand lever apparatus (10) has a rotationally operable operating lever (30) and a toggle mechanism (T). The operating lever (30) is operated to actuate, through the toggle mechanism (T), a cable (20) connected to a driven member (CV) so as to pull the cable (20).

Abstract: A hand lever apparatus (throttle lever) is provided which has the automatic restoring function (automatic idle rotation opening position restoring function) to cope with accidents and steadily hold a desired operation position (intermediate opening position of a throttle valve). The hand lever apparatus has a rotationally operable main lever (30) and a sub-lever (40) rotationally operated to pull a cable (10a) connected to a driven member (CV). The main lever (30) has a brake plate (34). By pressing the brake plate (34) against an operating portion (42) of the sub-lever (40), rotation of the sub-lever (40) is regulated to hold the sub-lever (40) in a position.

Abstract: A hand lever device is adapted so that a throttle valve as a driven member can be adjusted appropriately in its degree of opening via a cable and kept at a desired degree of opening and yet immediately returned to the minimum degree of opening. The throttle valve can be brought to the degree of opening at which it had stood before it was returned to the minimum opening degree without the necessity of readjustment. The hand lever device comprises a main lever (30) and a sub-lever (60) which ice pivotally operated, wherein the sub-lever (60) is adapted to draw a cable (20) connected to a driven member (CV) via a pulley (50), and wherein the pulley (50) is moved by the main lever (30).

Abstract: A hand lever device is disclosed which is adapted so that a throttle valve as a driven member can be adjusted appropriately in its degree of opening via a cable and kept at a desired degree of opening and yet immediately returned to the minimum degree of opening to ensure high safety. Thus, fatigue of an operator's fingers can be diminished. Also, the throttle valve is enabled to be brought to the degree of opening at which it had stood before it was returned to the minimum degree of opening without the necessity of readjustment. The hand lever device comprises an eccentric cam shaft (40) including a supporting shaft portion (42) and a pivot pin portion (41, 43) having pivotal axis (0b) eccentric to axis (0a) of the supporting shaft portion (42), a main lever (30) pivotally fitted on the supporting shaft portion (42), and a sub-lever (50) fixed to the pivot pin portion (41). The main lever (30) and sub-lever (50) are pivotally operated to draw a cable (20) connected to a driven member (CV).

Abstract: The present invent provides an improvement in the handling and operation of portable working machines, particularly in a loop front handle and an operation lever adjacent to the handle for easy operation. An operation lever mechanism for a handle according to the present invention includes: a rotatably supported body; a swingable operation lever pivotally supported by the rotatably supported body; and an operating portion movable in a direction along an axis X--X of the rotatably supported body, the operating portion connected to a swinging end of the operation lever, wherein the rotation axis X--X of the rotatably supported body is situated so as to encompass a virtual center X of a loop handle or a point adjacent to the center X, and the grip portions of second swinging end of the swingable operation lever rotate and move along an arc of the loop handle.

Abstract: A hand lever device is disclosed for adjusting the degree of openness of a throttle valve via a cable and kept at a desired opening degree and yet immediately returned to a minimum degree of opening to ensure high safety, thereby diminishing fatigue of fingers, and ensuring a desired level of operation. The hand lever device comprises a main lever (3) and a sub-lever (50) is attached to a wind-up tractive member (60) which draws a cable (20) connected to a driven member (CV) in such a manner that one end portion of the cable (20) is wound up thereon, and a torsion coil spring (40) is used as a brake operated by the main lever (30) for braking the wind-up tractive member (60) in order to hold the sub-lever (50) immobilized at any pivotally operated position.

Abstract: A portable electric working machine of the present invention includes a motor case portion housing an electric motor, a working portion driven by the electric motor, a handle connected to the motor case portion or the working portion and a power source switch disposed within a grip portion of the handle. Electric power is supplied to the electric motor through the power source switch. A spark-preventing capacitor accommodated within the motor case portion is interposed between a pair of terminals of the electric motor. The portable electric working machine of the present invention does not require a large-sized grip portion of a handle, and can prevent a locking of contacts of a power source switch due to contact transition by preventing sparking between the contacts so that a small-sized microswitch can be used.

Abstract: An elongated operating shaft supporting a tool at one end, a drive motor at its other end, and transmission means extending through said shaft to drive said tool is provided with a control handle for adjusting the holding and guiding the position and orientation of said tool. The control handle is formed of a unitary body having a handgrip section and an attachment section, which is provided with a hole into which the supporting shaft is inserted and which is formed with sufficient clearance to permit said handle body to be rocked to and fro along the longitudinal axis of the shaft. Spring means is mounted for biasing said handle body along an axis having an inclined position with respect to the longitudinal axis of the shaft so that said surface of the shaft is contacted by the surface of the hole at at least two opposed points, thereby to normally lock the handle body in said inclined position.

Abstract: A power working machine in which maintenance work is improved by having the heads of case fastening and motor fastening screws covered by the gasket provided between the mount base and the transmission cover. This prevents dirt load grease from clogging the heads of such screws. The transmission cover is also provided with through holes for the motor fastening screws and the case fastening screws, respectively.