Abstract: A self-propelled snow remover has a machine body, a snow-removing implement mounted to a front part of the machine body for undergoing rolling and vertical movement relative to the machine body, and an operating unit mounted to a rear part of the machine body. An alignment operating member is mounted to the operating unit for rolling and vertically moving the snow-removing implement. The alignment operating member is disposed on one of opposite sides of a widthwise central line of the machine body. A return operating member is mounted to the operating unit for automatically returning the snow-removing implement to a predetermined reference position. The return operating member is disposed proximate to the alignment operating member at a position closer to the widthwise central line of the machine body than the alignment operating member and further towards the rear part of the machine body than the alignment operating member.

Abstract: An operation lever structure wherein an operation lever is pulled toward a left handle to cause a link to swing-move to thereby operate an operation cable. The operation lever structure is configured so that each of inside and outside rollers are provided to an opposite end of the link. Inside and outside guide holes for movably supporting the inside and outside rollers are formed in each of a pair of inside and outside side walls. A discharge opening is formed in a bottom part of the operation lever for discharging a foreign matter that has entered the operation lever.

Abstract: An operation lever structure wherein an operation lever is pulled toward a left handle to cause a link to swing-move to thereby operate an operation cable. The operation lever structure is configured so that each of inside and outside rollers are provided to an opposite end of the link. Inside and outside guide holes for movably supporting the inside and outside rollers are formed in each of a pair of inside and outside side walls. A discharge opening is formed in a bottom part of the operation lever for discharging a foreign matter that has entered the operation lever.

Abstract: An assist mechanism of a steering apparatus for a working machine includes right and left operational arm members for selectively engaging and disengaging right and left clutches. Right and left cam grooves are formed in the right and left operational arm members, respectively. A bar-shaped member has opposite ends disposed within the right cam groove and the left cam groove, respectively. A compression spring is disposed along a central axis of the bar-shaped member for urging the right and left operational arm members in directions away from each other.

Abstract: A snow removing machine has an auger for plowing and collecting snow, a rotatable blower for throwing snow collected by the auger, and a shooter for guiding the snow thrown by the blower so that the snow reaches a selected point. The blower has a central shaft part and blades extending radially outwardly from the shaft part. Each of the blades has one pair of laterally spaced guide walls projecting from a distal end portion thereof in a direction of rotation of the blower. The pair of guide walls for each of the blades extend divergently from each other towards a distal end of the blade.

Abstract: A self-propelled snow remover having a snow-removing implement mounted to the front of a machine body so as to be capable of lifting, lowering, and rolling. The self-propelled snow remover includes an alignment operating member and a return operating member mounted to an operating unit. The alignment operating member is provided for both rolling and vertically moving the snow-removing implement and is disposed towards a left or right side with respect to a widthwise center of the machine body. The return operating member is operated as the snow-removing implement is returned automatically to a predetermined reference position and is disposed in the vicinity of the alignment operating member.

Abstract: A snow removal machine of this invention has a blower provided in a blower housing for throwing up snow collected by an auger toward a chute. The blower has a plurality of supporting members provided on a drive shaft for rotating the auger and the blower and a plurality of throwing-up blades attached to the respective supporting members. The throwing-up blades are elastically deformable. A vacant space is formed between the supporting members and the throwing-up blades. The vacant space allows deformation of the throwing-up blades in a direction opposite to the rotation direction of the blower.

Abstract: A walk-behind working machine has a traveling unit, a working unit, an engine, and an illumination section disposed forwardly of the engine for projecting light. A cover member collectively covers the engine and the illumination section. The cover member has a light transmitting section for transmitting therethrough light projected by the illumination section. The light transmitting section or a portion of the cover member near the light transmitting section has at least one through-hole through which heat generated by at least one of the engine and the illuminating section is radiated.

Abstract: An assist mechanism of a steering apparatus for a working machine includes right and left operational arm members for selectively engaging and disengaging right and left clutches. Right and left cam grooves are formed in the right and left operational arm members, respectively. A bar-shaped member has opposite ends disposed within the right cam groove and the left cam groove, respectively. A compression spring is disposed along a central axis of the bar-shaped member for urging the right and left operational arm members in directions away from each other.

Abstract: An auger device of a snow removal machine in this invention has left and right augers and left and right driving tines mounted on left and right auger shafts, respectively. Each auger has an outer auger blade, an intermediate auger blade and an inner auger blade each mounted at one end on the left or right auger shaft. The outer auger blade and inner auger blade are arranged along a first helical path. The intermediate auger blade is arranged 180° out of phase with the first helical path. The left and right driving tines bite into snow, thereby serving as anchors for preventing lifting of the left and right augers.

Abstract: A snow removal machine has first and second augers mounted on respective auger shafts. Each of the first and second augers has an outer helical auger blade, an intermediate helical auger blade and an inner helical auger blade. The outer helical auger blade and the inner helical auger blade of each of the first and second augers are disposed along a common first helical path and are spaced-apart from one another along a rotational axis of the corresponding auger shaft. The intermediate helical auger blade of each of the first and second augers is disposed along a second helical path angularly shifted substantially 180 degrees with respect to the first helical path.

Abstract: A snow removing machine includes a snow blower having a plurality of blades extending radially outwardly from a central shaft part. The blade has one pair of laterally spaced guide walls projecting from a distal end portion thereof in a direction of rotation of the blower. The guide walls extend divergently from each other towards a distal end of the blade.

Abstract: Illumination section is provided forwardly of an engine. Cover member collectively covers the engine and illumination section and includes a light transmitting section which passes therethrough light projected by the illumination section and has a through-hole for letting out hot air. Battery is positioned on a blower housing, and the illumination section is provided over the battery. Battery locking member for holding the battery in a battery holder is formed of an insulative resin material, and the illumination section is mounted on the locking member. The locking member is hinged at one end to the holder. Partition wall is provided between the engine and battery for blocking heat transferred from the engine toward the battery.

Abstract: An auger device of a snow removal machine in this invention has left and right augers and left and right driving tines mounted on left and right auger shafts, respectively. Each auger has an outer auger blade, an intermediate auger blade and an inner auger blade each mounted at one end on the left or right auger shaft. The outer auger blade and inner auger blade are arranged along a first helical path. The intermediate auger blade is arranged 180° out of phase with the first helical path. The left and right driving tines bite into snow, thereby serving as anchors for preventing lifting of the left and right augers.

Abstract: A snow removal machine of this invention has a blower provided in a blower housing for throwing up snow collected by an auger toward a chute. The blower has a plurality of supporting members provided on a drive shaft for rotating the auger and the blower and a plurality of throwing-up blades attached to the respective supporting members. The throwing-up blades are elastically deformable. A vacant space is formed between the supporting members and the throwing-up blades. The vacant space allows deformation of the throwing-up blades in a direction opposite to the rotation direction of the blower.

Abstract: An auger device of a snow removal machine includes left and right augers mounted on left and right auger shafts, respectively. Each auger has an outer auger blade, an intermediate auger blade and an inner auger blade each mounted at one end to the left or right auger shaft. The outer auger blade and inner auger blade are positioned along a first helical path. The intermediate auger blade is phase-shifted 180° with respect to the first helical path.

Abstract: A power transmission system for use in a snow-removing machine has a drive shaft having a first end for supporting a snow blower having a forward end and a rearward end. The drive shaft has second end disposed opposite the first end and for extension from the forward end of the snow blower. An auger transmission is connected to the second end of the drive shaft and has an auger shaft for undergoing rotation in accordance with rotation of the drive shaft. An auger is mounted on the auger shaft for rotation therewith. An overload protecting mechanism is disposed between the snow blower and the auger transmission for preventing application of a power overload between the drive shaft and the auger.

Abstract: A snow removing machine has a vehicle body having a body frame, a snow removing section mounted on a front portion of the body frame for removing snow, an operating handle mounted to a rear portion of the body frame and having a first handle portion and a second handle portion, and a pair of grip portions each mounted on a respective one of the first and second handle portions of the operating handle. A forward and aft drive changeover switch is directly mounted on the first handle portion of the operating handle for changing over a traveling direction of the vehicle body. A height control operation lever is directly mounted on the first handle portion of the operating handle for adjusting a height of the snow removing section. A speed control operation lever is directly mounted on the second handle portion of the operating handle for adjusting a traveling speed of the vehicle body.

Abstract: A snow removing machine comprising a forward and aft drivechangeover switch, a height control operation lever for adjusting the height of a snow removing plate, both mounted to one of grip portions, and a speed control operation lever mounted to the other one of the grip portions. Gripping the grip portions with his respective hands, an operator can manipulate the forward and aft drive changeover switch and the height control operation lever by one of his hands and the speed control operation lever by the other one of his hands, thereby making the operator avoid single hand driving of the machine.