Electric apparatus

Patent metadata

Field	Value
Publication number	US-9559539-B2
Application number	US-201113823416-A
Country	US
Kind code	B2
Filing date	Aug 25, 2011
Priority date	Oct 8, 2010
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

A rechargeable battery type electric power tool is widely used for a construction work or a horticultural work. A battery of the electric power tool can also be used as a power source of an electric apparatus. Because of this construction, there is provided the electric apparatus that has a function equivalent to that of an AC power source type apparatus.

First claim

The invention claimed is:

1. An electric apparatus having a heat generating function,
wherein,
the electric apparatus is configured to use, as a main power source of the electric apparatus, (1) a battery that has a power capacity to fully power an electric power tool and (2) an ordinary AC power source, whereby the battery is configured to be removable from the electric apparatus and has connectors that mechanically connect with corresponding connections of the electric power tool to fully power the electric power tool;
by use of the heat generating function, water can be boiled with a power supply that can supply power from the battery and alternatively from the AC power source;
the electric apparatus comprises a circuit that can detect current and voltage of the battery;
the electric apparatus has a function of shutting off the power supply of the electric apparatus and stopping operation of the electric apparatus when an output current of more than a predetermined value or an output voltage of less than a predetermined value is detected in the electric apparatus such that both the electric apparatus and the battery are prevented from being damaged by arranging a current detection element in a negative line of the electric apparatus and a voltage detection element between a positive and negative line of the electric apparatus, wherein the electric apparatus is separate from the battery; and
the electric apparatus has a heat retention function by which the power supply is suppressed and water temperature is maintained by the battery after the water is boiled.

2. The electric apparatus according to claim 1 , wherein the electric apparatus is a water boiler that can boil water or a coffee maker that can extract coffee by use of the heat generating function.

3. The electric apparatus according to claim 1 , wherein a plurality of batteries can be used in the electric apparatus, the batteries having a different rated voltages.

4. The electric apparatus according to claim 1 ,
wherein:
a plurality of the batteries can be connected to the electric apparatus in parallel; and
the batteries can be switched to supply power to the electric apparatus.

5. The electric apparatus according to claim 3 , wherein the batteries having different rated voltages can be used in combination.

6. The electric apparatus according to claim 1 , wherein the electric apparatus has a function of suppressing the power supply by use of a switching element when a battery whose rated voltage is over a predetermined value is placed in the electric apparatus.

7. The electric apparatus according to claim 1 , wherein the electric apparatus is provided with a water temperature sensor.

8. The electric apparatus according to claim 1 , wherein a cover for covering the battery is provided.

9. The electric apparatus according to claim 1 , wherein the voltage of the battery is suppressed according to an operating voltage of the heat retention function.

10. The electric apparatus according to claim 1 , wherein when the output voltage of the battery in use becomes less than the predetermined value, another battery is automatically switched to use to operate the electric apparatus.

11. The electric apparatus according to claim 1 , wherein in the heat retention function of the AC power source is turned off and then the battery is used as the power supply.

12. The electric apparatus according to claim 1 , wherein the electric power tool is a device that is separate from the electric apparatus.

Assignees

• Goto Masahiko
• Endo Takayoshi
• Nashimoto Tomonobu
• Makita Corp

Inventors

• Goto Masahiko
• Endo Takayoshi
• Nashimoto Tomonobu

Classifications

• H02J7/0063 Primary

  Electricity · mapped topic

• A47J31/005 Primary

  Portable or compact beverage making apparatus, e.g. for travelling, for use in automotive vehicles · CPC title

• Y10T307/461

  Cross-Sectional Technologies · mapped topic

• Y02E60/10

  Energy storage using batteries · CPC title