Handheld engine-driven working machine
AssigneeYamabiko Corporation
InventorKunimune KAWAMURA
Life of this patent
Estimating the term…
Abstract
A handheld engine-driven working machine has an AC power supply, a supplying device which supplies fuel and/or air to an engine, a first path and a second path which are connected to the AC power supply in series and connected to each other in parallel, a handle heater for a handle located in the first path, a device heater for the supplying device located in the second path, and a controller located in the second path. The controller includes a temperature switch for the supplying device and a half-wave blocking element connected to the device heater in series. The temperature switch blocks the second path when a temperature of the temperature switch is higher than a predetermined temperature.
Claims8
A handheld engine-driven working machine comprising:
- an AC power supply which supplies an AC power,
- a supplying device which supplies fuel and/or air to an engine,
- a first path and a second path which are connected to the AC power supply in series and connected to each other in parallel,
- a handle heater for a handle, the handle heater being located in the first path,
- a device heater for the supplying device, the device heater being located in the second path, and
- a controller located in the second path,
- wherein the controller includes a temperature switch for the supplying device, and a half-wave blocking element connected to the device heater in series, and
- wherein the temperature switch blocks the second path when a temperature of the temperature switch is higher than a predetermined temperature.
A handheld engine-driven working machine comprising:
- an AC power supply which supplies an AC power,
- a supplying device which supplies fuel and/or air to an engine,
- a first path and a second path which are connected to the AC power supply in series and connected to each other in parallel,
- a handle heater for a handle, the handle heater being located in the first path,
- a device heater for the supplying device, the device heater being located in the second path, and
- a controller located in the second path,
- wherein the controller has a first branch path and a second branch path which are connected to the device heater in series and connected to each other in parallel,
- wherein the controller further has a first temperature switch for the supplying device. a first half-wave blocking element located in the first branch path so as to be connected to the device heater in series, a second temperature switch for the supplying device, and a second half-wave blocking element located in the second branch path so as to be connected to the device heater in series,
- wherein the first half-wave blocking element is arranged in a direction so as to pass only one of the half-waves of the AC power, while the second half-wave blocking element is arranged in a direction so as to pass only the other half-wave of the AC power, and
- wherein the first temperature switch blocks the first branch path when a temperature of the first temperature switch is higher than a first predetermined temperature, while the second temperature switch blocks the second branch path when a temperature of the second temperature switch is higher than a second predetermined temperature, the first predetermined temperature being higher than the second predetermined temperature.
Dependencies are inferred from the claim text.