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US 12,478,994 B2Granted
Mist blower
AssigneeMakita Corporation
InventorsAkihiro Nakamoto, Masatoshi Ito, Ryoji Zama, Yuki Koide
Life of this patent
Estimating the term…
Abstract
A mist blower in one aspect of the present disclosure includes an air blower, an air feed pipe, a tank, a liquid feed pipe, a nozzle, a first electromagnetic valve, a controller, and a first manual switch. The first electromagnetic valve (i) opens the liquid feed pipe in response to the first electromagnetic valve being activated and (ii) closes the liquid feed pipe in response to the first electromagnetic valve being deactivated. The controller activates or deactivates the air blower and the first electromagnetic valve. The first manual switch (i) is manually moved by a user of the mist blower and (ii) commands the controller to activate or deactivate the air blower based on a movement of the first manual switch.
Claims23
A mist blower comprising:
- an air blower configured (i) to generate or increase an airflow in response to the air blower being activated and (ii) to stop or decrease the airflow in response to the air blower being deactivated, the air blower including:
- an impeller configured to be rotated to thereby generate the airflow;
- and
- an electric motor configured to rotate the impeller;
- an air feed pipe (i) having a first discharge port and (ii) configured to guide the airflow from the air blower to the first discharge port;
- a tank configured to hold a liquid therein;
- a liquid feed pipe (i) having an inflow port and an outflow port and (ii) configured to guide the liquid from the inflow port to the outflow port, the inflow port being connected to the tank;
- a nozzle (i) having a second discharge port and (ii) connected to the outflow port, the second discharge port being arranged in the air feed pipe so as to discharge the liquid in the liquid feed pipe into the air feed pipe by a negative pressure generated by the airflow flowing through the air feed pipe;
- a first electromagnetic valve configured (i) to open the liquid feed pipe in response to the first electromagnetic valve being activated and (ii) to close the liquid feed pipe in response to the first electromagnetic valve being deactivated;
- a controller configured to activate or deactivate the electric motor and the first electromagnetic valve, wherein the controller is programmed to activate the first electromagnetic valve based on an actual rotational frequency of the electric motor having reached a first preset rotational frequency threshold;
- and
- a first manual switch configured to be manually moved by a user of the mist blower, the first manual switch being configured to command the controller to activate or deactivate the air blower based on a movement of the first manual switch.
9 more elements
A mist blower comprising:
- an air blower configured (i) to generate or increase an airflow in response to the air blower being activated and (ii) to stop or decrease the airflow in response to the air blower being deactivated, the air blower including:
- an impeller configured to be rotated to thereby generate the airflow;
- and
- an electric motor configured to rotate the impeller;
- an air feed pipe (i) having a first discharge port and (ii) configured to guide the airflow from the air blower to the first discharge port;
- a tank configured to hold a liquid therein;
- a liquid feed pipe (i) having an inflow port and an outflow port and (ii) configured to guide the liquid from the inflow port to the outflow port, the inflow port being connected to the tank;
- a nozzle (i) having a second discharge port and (ii) connected to the outflow port, the second discharge port being arranged in the air feed pipe so as to discharge the liquid in the liquid feed pipe into the air feed pipe by a negative pressure generated by the airflow flowing through the air feed pipe;
- a first electromagnetic valve configured (i) to open the liquid feed pipe in response to the first electromagnetic valve being activated and (ii) to close the liquid feed pipe in response to the first electromagnetic valve being deactivated;
- a controller configured to activate or deactivate the air blower and the first electromagnetic valve;
- a first manual switch configured to be manually moved by a user of the mist blower, the first manual switch being configured to command the controller to activate or deactivate the air blower based on a movement of the first manual switch;
- a connector configured to be connected to a battery;
- and
- a rotational position sensor configured to detect a rotational position of the electric motor,
- wherein the first electromagnetic valve includes a solenoid,
- wherein the controller is configured (i) to activate the electric motor to thereby activate the air blower and (ii) to deactivate the electric motor to thereby deactivate the air blower,
- wherein the controller is configured to:
- receive an electric power from the battery connected to the connector;
- respectively deliver a first drive current and a second drive current to the electric motor and the solenoid to thereby respectively activate the electric motor and the first electromagnetic valve;
- and
- respectively interrupt the first drive current and the second drive current to thereby respectively deactivate the electric motor and the first electromagnetic valve,
- wherein the controller is configured to activate the first electromagnetic valve based on an actual rotational frequency of the electric motor having reached a first preset rotational frequency threshold, and
- wherein the controller is configured to measure the actual rotational frequency of the electric motor based on the rotational position detected.
20 more elements
Dependencies are inferred from the claim text.