Abstract: A lawn mower includes a main body portion and a lawn collecting container arranged at a rear of the main body portion and connected with the main body portion which can be freely disassembled and assembled relative to the main body portion. A cylindrical housing part is formed on the main body portion and provided with an opening at a bottom part of the main body portion, and a mowing blade is housed in the housing part. When the lawn collecting container is removed from the main body portion and the main body portion is vertical with a rear part of the main body portion is configured as a lower side, the lawn collecting container can be mounted to the bottom part, part of the lawn collecting container enters the housing part from the bottom part, and an inner surface of the housing part can support the lawn collecting container.

Abstract: To provide a vacuum cleaner capable of effectively preventing damage to a fan and a fan case without significantly decreasing the suction force. The vacuum cleaner includes a suction portion, a centrifugal separation portion, and a first collection portion that are provided on an upstream side of a fan stored in a fan case; and a second collection portion provided on a downstream side of the fan. The vacuum cleaner is configured to, with rotation of the fan, separate a part of air introduced into the centrifugal separation portion via the suction portion to the first collection portion side, thereby collecting sucked objects contained in the air into the first collection portion, and separate another part of the air introduced into the centrifugal separation portion to the fan side, thereby collecting sucked objects contained in the air into the second collection portion.

Abstract: A shoulder harness for a portable work machine comprises a back member that is to be located on a back of an operator, said back member including a main frame, to which a downward extension frame connected with a waist belt is detachably attached; right and left shoulder belts that respectively extend from right and left upper end portions of said back member; a joint buckle that is to be located on a chest of said operator, distal ends of said right and left shoulder belts being connected to said joint buckle; a hip pad that is to be located on a side of a waist of said operator, and is provided with a locking device, to which a work machine is connected; a relay member that is located above said locking device, and is connected to said locking device by a hanging member; a rear suspension belt that is connected to said relay member and said back member; and a front suspension belt that is connected to said relay member and said joint buckle.

Abstract: A shoulder harness for a portable work machine comprises a back member that is to be located on a back of an operator, said back member including a main frame, to which a downward extension frame connected with a waist belt is detachably attached; right and left shoulder belts that respectively extend from right and left upper end portions of said back member; a joint buckle that is to be located on a chest of said operator, distal ends of said right and left shoulder belts being connected to said joint buckle; a hip pad that is to be located on a side of a waist of said operator, and is provided with a locking device, to which a work machine is connected; a relay member that is located above said locking device, and is connected to said locking device by a hanging member; a rear suspension belt that is connected to said relay member and said back member; and a front suspension belt that is connected to said relay member and said joint buckle.

Abstract: A shoulder harness includes a harness network (102) composed of right and left shoulder belts (104) and a side-fitting belt (114) for fitting on the left side of an operator's chest and joining at one end with front ends of the shoulder belts (104) on a stomach area of the operator. The shoulder harness further includes an intermediary member (120) connected to the harness network (102) via a holding member (122) and supporting a hook (108) for retaining a working machine. The right and left shoulder belts (104) are shaped asymmetric such that a shoulder-fitting portion (110Le) of the left shoulder belt (104Le) curves or slants toward the working machine retained on the hanging element (108).

Abstract: A shoulder harness includes a harness network (102) composed of right and left shoulder belts (104) and a side-fitting belt (114) for fitting on the left side of an operator's chest and joining at one end with front ends of the shoulder belts (104) on a stomach area of the operator. The shoulder harness further includes an intermediary member (120) connected to the harness network (102) via a holding member (122) and supporting a hook (108) for retaining a working machine. The right and left shoulder belts (104) are shaped asymmetric such that a shoulder-fitting portion (110Le) of the left shoulder belt (104Le) curves or slants toward the working machine retained on the hanging element (108).

Abstract: 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 a scavenging introducing passageway (40) for introducing an air-fuel mixture (K) from a crank chamber (18) into the scavenging inlet ports (31a) is provided between the cylinder bore and the piston adapted to reciprocatively move up and down in the cylinder bore (10a), and an effective opening area of the scavenging inlet ports (31a) is gradually decreased due to the piston (20) in the course of descending stroke of the piston (20).

Abstract: 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 a scavenging introducing passageway (40) for introducing an air-fuel mixture (K) from a crank chamber (18) into the scavenging inlet ports (31a) is provided between the cylinder bore and the piston adapted to reciprocatively move up and down in the cylinder bore (10a), and an effective opening area of the scavenging inlet ports (31a) is gradually decreased due to the piston (20) in the course of descending stroke of the piston (20).