Chain saw

Patent metadata

Field	Value
Publication number	US-10814517-B2
Application number	US-201816157387-A
Country	US
Kind code	B2
Filing date	Oct 11, 2018
Priority date	Oct 13, 2017
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

A chain saw disclosed herein may include a motor configured to rotate a saw chain about a guide bar, a control unit configured to control a voltage applied to the motor, a body housing that houses the motor and the control unit, a battery detachably attached to the body housing, and a top handle provided above the body housing. The control unit may be disposed above the battery. In a rear view of the chain saw in a state where the chain saw is placed on a mount surface, the battery and the control unit may not overlap. In a top view of the chain saw in the state where the chain saw is placed on the mount surface, the battery and the control unit may overlap at least partially.

First claim

What is claimed is:

1. A chain saw comprising
a motor configured to rotate a saw chain about a guide bar of the chain saw;
a control unit configured to control a voltage applied to the motor;
a body housing that houses the motor and the control unit;
a battery detachably attached to the body housing; and
a top handle provided above the body housing,
wherein
the control unit includes an inverter circuit provided with a switching element and a control circuit configured to control operation of the switching element,
the control unit is disposed above the battery,
in a rear view of the chain saw in a state where the chain saw is placed on a mount surface, the battery and the control unit do not overlap, and
in a top view of the chain saw in the state where the chain saw is placed on the mount surface, the battery and the control unit overlap at least partially.

2. The chain saw according to claim 1 , wherein
in the rear view of the chain saw in the state where the chain saw is placed on the mount surface, the top handle and the battery do not overlap, and
in the top view of the chain saw in the state where the chain saw is placed on the mount surface, the top handle and the battery overlap at least partially.

3. The chain saw according to claim 1 , wherein the battery is detachable by being slid in a left-right direction relative to the body housing.

4. The chain saw according to claim 1 , wherein
in the top view of the chain saw in a state where the chain saw is placed on the mount surface, the motor and the battery do not overlap, and the motor and the control unit do not overlap, and
in the rear view of the chain saw in the state where the chain saw is placed on the mount surface, the motor and the battery overlap at least partially, and the motor and the control unit overlap at least partially.

5. The chain saw according to claim 4 , wherein the battery and the control unit are disposed on a rear side relative to the motor.

6. The chain saw according to claim 4 , wherein in the top view of the chain saw in the state where the chain saw is placed on the mount surface, the motor is disposed within a range of 1.2 times a width of the battery in a left-right direction from a center line of the battery in the left-right direction.

7. A chain saw comprising:
a motor configured to rotate a saw chain about a guide bar of the chain saw;
a control unit configured to control a voltage applied to the motor;
a body housing that houses the motor and the control unit;
a battery detachably attached to the body housing; and
a top handle provided above the body housing,
wherein
the control unit includes an inverter circuit provided with a switching element and a control circuit configured to control operation of the switching element,
the control unit is disposed above the battery,
in a rear view the chain saw in a state where the chain saw is placed on a mount surface, the battery and the control unit do not overlap,
in a top view of the chain saw in the state where the chain saw is placed on the mount surface, the battery and the control unit overlap at least partially,
a hand rest is provided in a vicinity of a portion of the body housing where a rear end of the top handle connects to the body housing, and
the control unit is disposed inside the hand rest.

8. The chain saw according to claim 7 , wherein
in the rear view of the chain saw in the state where the chain saw is placed on the mount surface, the top handle and the battery do not overlap, and
in the top view of the chain saw in the state where the chain saw is placed on the mount surface, the top handle and the battery overlap at least partially.

9. The chain saw according to claim 7 , wherein the battery is detachable by being slid in a left-right direction relative to the body housing.

10. The chain saw according to claim 7 , wherein
in the top view of the chain saw in a state where the chain saw is placed on the mount surface, the motor and the battery do not overlap, and the motor and the control unit do not overlap, and
in the rear view of the chain saw in the state where the chain saw is placed on the mount surface, the motor and the battery overlap at least partially, and the motor and the control unit overlap at least partially.

11. The chain saw according to claim 10 , wherein the battery and the control unit are disposed on a rear side relative to the motor.

12. The chain saw according to claim 10 , wherein in the top view of the chain saw in the state where the chain saw is placed on the mount surface, the motor is disposed within a range of 1.2 times a width of the battery in a left-right direction from a center line of the battery in the left-right direction.

Assignees

• Makita Corp

Inventors

• Suzuki Daisuke
• Niiyama Takuma

Classifications

• B27B17/144

  with adjustment by at least one threaded screw · CPC title

• B27B17/08

  Drives or gearings; Devices for swivelling or tilting the chain saw · CPC title

• B27B17/12 Primary

  Lubricating devices specially designed for chain saws · CPC title

• B27B17/0008

  Means for carrying the chain saw, e.g. handles (B27B17/0033 takes precedence) · CPC title

• B27B17/00 Primary

  Chain saws; Equipment therefor {(slotting or mortising machines equipped with chain cutters B27F5/06)} · CPC title