Cutting device

Patent metadata

Field	Value
Publication number	US-10220457-B2
Application number	US-201615386070-A
Country	US
Kind code	B2
Filing date	Dec 21, 2016
Priority date	Jan 13, 2016
Publication date	Mar 5, 2019
Grant date	Mar 5, 2019

Abstract

A cutting device may include a main body supported on the upper side of a base. The main body includes a rotary blade and a fixed cover partially covering the rotary blade. A handle is attached to the fixed cover and extends rearward therefrom.

First claim

The invention claimed is:

1. A cutting device comprising:
a device body comprising an electric motor, a circular rotary blade configured to be rotatably driven by the electric motor, a fixed cover configured to cover an upper half of the circular rotary blade, a handle including a grip configured to be grasped by a user and a handle support portion extending rearward from the fixed cover in a rearward direction opposite a cutting direction; and
a base configured to support the device body on an upper side of the base,

wherein:
a lower portion of the circular rotary blade protrudes downward from the base, and the protruding lower portion of the circular rotary blade is configured to cut into a workpiece as the cutting device moves in the cutting direction;
the base has a front end opposite to a rear end thereof in the cutting direction;
the handle extends along a direction parallel to a plane of the circular rotary blade and includes a rear portion that projects rearward beyond the rear end of the base;
the grip is disposed at the rear portion of the handle;
the handle is attached to the fixed cover adjacent to a front side of the grip in the direction opposite the cutting direction;
the handle is joined, at least partly, to the fixed cover via the handle support portion;
the handle support portion has a first side spaced from a second side thereof in a direction perpendicular to the cutting direction, the first side facing away from the handle; and
the handle has a first side spaced from a second side thereof in the direction perpendicular to the cutting direction, the first side of the handle having a joining portion pressed against and connected to the second side of the handle support portion.

2. The cutting device according to claim 1 , wherein each of the fixed cover and the handle support portion is formed of metal.

3. The cutting device according to claim 1 , wherein:
the device body further comprises a battery mount portion configured to detachably mount at least one battery pack as a power source for the electric motor;
the battery mount portion is disposed rearward of the electric motor in the direction opposite the cutting direction and extends rearward away from the electric motor; and
the handle extends rearward from a rear portion of the battery mount portion in the direction opposite the cutting direction.

4. The cutting device according to claim 3 , wherein:
the at least one battery pack comprises two battery packs, and
the battery mount portion is configured such that the two battery packs are arranged side-by-side in a direction parallel to the cutting direction when mounted on the battery mount portion.

5. A cutting device comprising:
a device body comprising an electric motor, a circular rotary blade configured to be rotatably driven by the electric motor, a fixed cover configured to cover an upper half of the circular rotary blade, a handle including a grip configured to be grasped by a user and a battery mount portion configured to detachably mount at least one battery pack as a power source for the electric motor; and
a base configured to support the device body on an upper side of the base,

wherein:
a lower portion of the circular rotary blade protrudes downward from the base, and the protruding lower portion of the circular rotary blade is configured to cut into a workpiece as the cutting device moves in a cutting direction;
the base has a front end opposite to a rear end thereof in the cutting direction;
the handle extends along a direction parallel to a plane of the circular rotary blade and includes a rear portion that projects rearward beyond the rear end of the base;
the grip is disposed at the rear portion of the handle;
the handle is attached to the fixed cover adjacent to a front side of the grip in the cutting direction;
the battery mount portion is disposed rearward of the electric motor in the cutting direction and extends rearward away from the electric motor;
the handle extends rearward from a rear portion of the battery mount portion in a rearward direction opposite the cutting direction; and
the battery mount portion directly contacts a portion of the fixed cover between the circular rotary blade and the electric motor in a direction perpendicular to the cutting direction.

6. The cutting device according to claim 5 , further comprising a handle support portion extending rearward from the fixed cover in the direction opposite the cutting direction, wherein the rear portion of the battery mount portion is attached to a rearward portion of the fixed cover via the handle support portion.

7. The cutting device according to claim 6 , wherein the handle comprises a D-shaped handle.

8. The cutting device according to claim 7 , wherein the electric motor includes a motor shaft having a rotational axis extending parallel to a rotational axis of the rotary blade.

9. The cutting device according to claim 5 , wherein:
the at least one battery pack comprises two battery packs, and
the battery mount portion is configured such that the two battery packs are arranged side-by-side in a direction parallel to the cutting direction when mounted on the battery mount portion.

10. A cutting device comprising:
a device body comprising an electric motor, a circular rotary blade configured to be rotatably driven by the electric motor, a fixed cover configured to cover an upper half of the circular rotary blade, a handle including a grip configured to be grasped by a user and a battery mount portion configured to detachably mount two battery packs as a power source for the electric motor; and
a base configured to support the device body on an upper side of the base,

wherein:
a lower portion of the circular rotary blade protrudes downward from the base, and the protruding lower portion of the circular rotary blade is configured to cut into a workpiece as the cutting device moves in a cutting direction;
the base has a front end opposite to a rear end thereof in the cutting direction;
the handle comprises a D-shaped handle including a rear portion that projects rearward beyond the rear end of the base;
the electric motor includes a motor shaft having a rotational axis extending parallel to a rotational axis of the rotary blade;
the battery mount portion is disposed rearward of the electric motor and extends rearward away from the electric motor;
the handle extends rearward from a rear portion of the battery mount portion, and
the battery mount portion is configured such that the two battery packs are arranged side-by-side in a direction parallel to the cutting direction when mounted on the battery mount portion.

11. The cutting device according to claim 10 , wherein the electric motor is a brushless motor.

12. The cutting device according to claim 10 , wherein the battery mount portion is attached to the fixed cover adjacent to a front side of the grip.

13. The cutting device according to claim 10 , wherein the battery mount portion directly contacts a portion of the fixed cover between the circular rotary blade and the electric motor in a direction perpendicular to the cutting direction.

14. A cutting device comprising:
a device body comprising an electric motor, a circular rotary blade rotatably driven by the electric motor, a fixed cover configured to cover an upper half of the circular rotary blade, a handle having a trigger grip portion configured to be grasped by a user while pulling a trigger of the cutting device to operate the cutting device and a battery mount portion configured to detachably mount at least one battery pack as a power source for t

Assignees

• Makita Corp

Inventors

• Kume Sho
• Inayoshi Hirotomo
• Shi Yan

Classifications

• B23D47/00

  Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts (constructional features of these parts per se B23Q; details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F5/00) · CPC title

• B23D45/16 Primary

  Hand-held sawing devices with circular saw blades · CPC title

• B25F5/02

  Construction of casings, bodies or handles {(B25F5/006, B25F5/008 take precedence)} · CPC title

• B23D47/12

  of drives for circular saw blades · CPC title

• B23D29/02 Primary

  Hand-operated metal-shearing devices · CPC title