Abstract: A general purpose engine includes: a cooling fan fixed to an engine rotary shaft; a muffler to silence exhaust gases; a muffler covering to cover the muffler; and an auto choke device to control an opening of a choke valve in an air intake passage by the utilization of heat evolved from the muffler. The auto choke device includes: a drive source, which is fitted to the muffler covering in a non-contact fashion to the muffler and exposed to an outer surface of the muffler covering; and a link member to connect between the drive source and the choke valve. The drive source includes a bracket, which is fitted to the muffler covering, and a bimetal fitted inside the bracket. The bracket includes a heat shield extending towards an inner side of the muffler covering, and the heat shield blocks out a cooling wind then flowing towards the bimetal.

Abstract: A general purpose engine includes: a cooling fan fixed to an engine rotary shaft; a muffler to silence exhaust gases; a muffler covering to cover the muffler; and an auto choke device to control an opening of a choke valve in an air intake passage by the utilization of heat evolved from the muffler. The auto choke device includes: a drive source, which is fitted to the muffler covering in a non-contact fashion to the muffler and exposed to an outer surface of the muffler covering; and a link member to connect between the drive source and the choke valve. The drive source includes a bracket, which is fitted to the muffler covering, and a bimetal fitted inside the bracket. The bracket includes a heat shield extending towards an inner side of the muffler covering, and the heat shield blocks out a cooling wind then flowing towards the bimetal.

Abstract: A wood or resin cutting tool with improved durability is provided. The wood or resin cutting tool is composed of a base material made of steel or a cemented carbide alloy, and a coating formed on at least one of the rake face and the clearance face of the cutting tool. The coating includes a periodic structure layer made of chromium oxynitride, in which high oxygen regions having a high concentration of oxygen in the texture and low oxygen regions having a lower concentration of oxygen in the texture than the high oxygen regions periodically exist in the thickness direction of the coating. The periodic structure layer is formed such that the nitrogen concentration periodically turns high and low in the thickness direction of the layer corresponding to the high oxygen regions and the low oxygen regions.

Abstract: The invention suppresses chipping of a cutting edge of a cutting tool while maintaining sharpness of the cutting edge. [Solution] A coating (20) of a replaceable knife (10) of the cutting tool is formed so that either one of a rake-face coating portion (22) that coats a rake face (14) or a clearance-face coating portion (24) that coats a clearance face (16) becomes thicker than the other. The film thickness of the thicker coating portion (22, 24) is set in a range of 0.5 ?m to 15.0 ?m, and a ratio of the film thickness of the thinner coating portion (24, 22) to the film thickness of the thicker coating portion (22, 24) is set in a range of 0.01 to 0.15.

Abstract: The invention suppresses chipping of a cutting edge of a cutting tool while maintaining sharpness of the cutting edge. [Solution] A coating (20) of a replaceable knife (10) of the cutting tool is formed so that either one of a rake-face coating portion (22) that coats a rake face (14) or a clearance-face coating portion (24) that coats a clearance face (16) becomes thicker than the other. The film thickness of the thicker coating portion (22, 24) is set in a range of 0.5 ?m to 15.0 ?m, and a ratio of the film thickness of the thinner coating portion (24, 22) to the film thickness of the thicker coating portion (22, 24) is set in a range of 0.01 to 0.15.

Abstract: A spare blade 25 is a square plate formed of cemented carbide and to be attached to an outer circumferential surface of a cutter 10 for forming a plane. A flat face 28 forming cutting edges is a convex portion 28a slightly bulging in a shape of a lateral surface of a single cone, and a center of the square plate lies on an axis of the convex portion 28a. An entire surface of the spare blade 25 is covered with a diamond coating film having a thickness of 5 to 25 ?m.

Abstract: A wood or resin cutting tool with improved durability is provided. The wood or resin cutting tool is composed of a base material made of steel or a cemented carbide alloy, and a coating formed on at least one of the rake face and the clearance face of the cutting tool. The coating includes a periodic structure layer made of chromium oxynitride, in which high oxygen regions having a high concentration of oxygen in the texture and low oxygen regions having a lower concentration of oxygen in the texture than the high oxygen regions periodically exist in the thickness direction of the coating. The periodic structure layer is formed such that the nitrogen concentration periodically turns high and low in the thickness direction of the layer corresponding to the high oxygen regions and the low oxygen regions.

Abstract: Provided is a wood cutting tool with improved wear resistance and corrosion resistance. A hard fundamental layer (18) of chromium nitride (CrN) is subjected to PVD to be coated on a rake face (16) of a substrate (12) formed of a cemented carbide alloy or a tool steel. The hard fundamental layer (18) has a five-layer structure having a first layer (18a) to a fifth layer (18e) disposed in order from the substrate (12) side. A hard main layer (20) of chromium oxide (Cr2O3) is coated on the outer surface of the fifth layer (18e) of the hard fundamental layer (18). The hard main layer (20), like the hard fundamental layer (18), is formed by PVD. The hard fundamental layer (18) is coated with the hard main layer (20) to suppress corrosion, thereby improving the wear resistance and corrosion resistance of a cemented carbide replaceable knife (10).

Abstract: Provided is a wood cutting tool with improved wear resistance and corrosion resistance. A hard fundamental layer (18) of chromium nitride (CrN) is subjected to PVD to be coated on a rake face (16) of a substrate (12) formed of a cemented carbide alloy or a tool steel. The hard fundamental layer (18) has a five-layer structure having a first layer (18a) to a fifth layer (18e) disposed in order from the substrate (12) side. A hard main layer (20) of chromium oxide (Cr2O3) is coated on the outer surface of the fifth layer (18e) of the hard fundamental layer (18). The hard main layer (20), like the hard fundamental layer (18), is formed by PVD. The hard fundamental layer (18) is coated with the hard main layer (20) to suppress corrosion, thereby improving the wear resistance and corrosion resistance of a cemented carbide replaceable knife (10).

Abstract: A four-wheeled utility vehicle including an engine unit mounted in the utility vehicle; and a vehicle body frame including a frame member that is disposed in the vicinity of the engine unit and is partially movable relative to the engine unit.

Abstract: A four-wheeled utility vehicle including an engine unit mounted in the utility vehicle; and a vehicle body frame including a frame member that is disposed in the vicinity of the engine unit and is partially movable relative to the engine unit.

Abstract: A cover structure for a belt converter facilitating more easily inspecting or replacing a drive belt in a small vehicle in which an obstacle is provided in such a direction as to hinder removal of a cover configured for covering an outer periphery and an outer side face portion of a belt converter.

Abstract: A substantially flat-shaped board type carrier (8) is placed on a carrier frame mounted on the front and/or rear of a straddle type four wheeled all-terrain vehicle. The carrier surface (8A) on which baggage is placed is provided with numerous lateral anti-slip projections (8e) that are parallel to one another and expand outward. Of the parts comprising the carrier frame, at least the front main frame and rear main frame are made of pipe and support the carrier by being fitted into the fitting grooves formed by the ribs on the bottom surface of the carrier.