The battery-powered backpack blower includes a back support assembly including a back plate configured to permit a user to mount the blower to the user's back, and a volute assembly including a first volute portion and a second volute portion. The backpack blower further includes a housing assembly including a battery assembly and a motor assembly therein, the housing assembly is provided intermediate to the back assembly and the volute assembly.

A power tool includes a housing, a drive motor, an energy source interface, a first switch, a second switch, and a control unit. The energy source interface is used for access to an energy source to provide a power supply for the drive motor. The first switch is disposed on a power supply circuit of the power supply and is capable of controlling the drive motor to rotate in a full power output mode. The second switch is disposed on a power supply circuit of the power supply and is capable of controlling the drive motor to rotate in a variable power mode. The control unit is capable of controlling the drive motor to rotate in the full power output mode when the first switch is turned on and of controlling the drive motor to rotate in a variable power output mode when the second switch is turned on.

A power tool includes a housing, a drive motor, an energy source interface, a first switch, a second switch, and a control unit. The energy source interface is used for access to an energy source to provide a power supply for the drive motor. The first switch is disposed on a power supply circuit of the power supply and is capable of controlling the drive motor to rotate in a full power output mode. The second switch is disposed on a power supply circuit of the power supply and is capable of controlling the drive motor to rotate in a variable power mode. The control unit is capable of controlling the drive motor to rotate in the full power output mode when the first switch is turned on and of controlling the drive motor to rotate in a variable power output mode when the second switch is turned on.

An outlet tube includes a first rib, a second rib, and a channel positioned between the first rib and the second rib. The first rib extends from a surface of the tube. The first rib tapers between a first thickness and a second thickness. The second rib extends from the surface of the tube. The second rib tapers between the first thickness and the second thickness. The channel has a first width between adjacent first thicknesses and a second width between adjacent second thicknesses. The first width is greater than the second width.

An outlet tube includes a first rib, a second rib, and a channel positioned between the first rib and the second rib. The first rib extends from a surface of the tube. The first rib tapers between a first thickness and a second thickness. The second rib extends from the surface of the tube. The second rib tapers between the first thickness and the second thickness. The channel has a first width between adjacent first thicknesses and a second width between adjacent second thicknesses. The first width is greater than the second width.

A combination rake/refuse collector has a rake portion which traps leaves and other debris, a handle portion which contains a hollow tube, a connector portion which connects the hollow tube to a vacuum unit, and a storage/processing container. The vacuum unit and storage processing container are carried via a shoulder harness with two straps on the back of user. The vacuum unit sucks leaves and other debris collected by the rake portion, through the hollow tube and the connector portion, and directs them to the vacuum storage bag where they are shredded and exhausted into the leaf vacuum bag. The handle portion allows the user to direct the rake portion.

Disclosed herein is a power tool that includes a direct current power source, motor, and motor controller. In some embodiments, the power source comprises a battery pack configured to supply current at a nominal voltage in excess of 100 VDC. Embodiments of the tool are configured to operate at a high power at least comparable to tools operating at lower voltages, and to produce noise levels in operation that are less than 65 decibels.

Disclosed herein is a power tool that includes a direct current power source, motor, and motor controller. In some embodiments, the power source comprises a battery pack configured to supply current at a nominal voltage in excess of 100 VDC. Embodiments of the tool are configured to operate at a high power at least comparable to tools operating at lower voltages, and to produce noise levels in operation that are less than 65 decibels.

An electric work machine in one aspect of the present disclosure includes an output shaft, a brushless DC motor, a first positive-side conduction path, a first negative-side conduction path, a first switch device, a manual switch, a rotation sensor, and a controller. The first switch device is on the first positive-side conduction path or the first negative-side conduction path. The controller controls a magnitude of a conduction angle based on an actual rotational frequency and a target rotational frequency of the brushless DC motor.

An electric work machine in one aspect of the present disclosure includes an output shaft, a brushless DC motor, a first positive-side conduction path, a first negative-side conduction path, a first switch device, a manual switch, a rotation sensor, and a controller. The first switch device is on the first positive-side conduction path or the first negative-side conduction path. The controller controls a magnitude of a conduction angle based on an actual rotational frequency and a target rotational frequency of the brushless DC motor.