US 10,668,644 B2Granted

Portable cutting devices

AssigneeMakita Corporation

InventorsKatsumi Okouchi, Yohei Ogino

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Abstract

The dust proof circular saw has a main body with a rotating disc cutter blade and a cover fixed to the body to cover a blade outer radial periphery part. The body is supported by a base such that an angle of the body in the up-down and right-left directions can be adjusted at a base upper side. A further blade outer radial periphery is covered by an auxiliary cover. The auxiliary cover covers a gap between the fixed cover and the base. The auxiliary cover is moved by a mechanism relative to the body in accordance with an angle of the circular saw main body relative to the base in the up-down direction. The auxiliary cover is pivotally connected to the base, and is pivoted around a laterally tilting support shaft in the right-left direction by an interlock mechanism in accordance with a body angle in the right-left direction.

Claims9

Dependent claims

A portable cutting device comprising:

a cutting device main body having a motor;
a disc cutter blade that is rotated by the motor;
a fixed cover that is fixed to the cutting device main body to cover a part of an outer radial periphery of the disc cutter blade;
a base configured to support the cutting device main body such that an angle of the cutting device main body in an up-down direction relative to the base can be adjusted above the base to adjust the extent to which the disc cutter blade projects in a downward direction beneath the base, wherein the base also supports the cutting device main body such that an angle in a right-left direction of the cutting device main body relative to the base can be adjusted to adjust a tilting angle of the disc cutter blade in the right-left direction;
an auxiliary cover (1) configured to cover an outer radial periphery of the disc cutter blade between the fixed cover and the base and (2) that includes (a) an angular guide that is attached to the base and (b) a dust cover that connects the angular guide and the cutting device main body;
a laterally tilting support shaft configured to pivotally connect the auxiliary cover to the base such that the auxiliary cover can pivot around the laterally tilting support shaft relative to the base in the right-left direction in accordance with the angle of the cutting device main body in the right-left direction;
and
an auxiliary cover moving mechanism that includes (1) a vertically elongated cam surface formed by the dust cover and (2) a cam follower comprising a pin protruding from the cutting device main body that interacts with the cam surface as the pin moves along the cam surface so that the dust cover is movably connected in the up-down and front-rear directions to the cutting device main body;
the cam surface includes a recessed portion of a rear edge of the dust cover in front-to-rear edge of the dust cover in a front-to-rear direction;
and
the pin movably abuts the recessed portion of the cam surface.

8 more elements

A portable cutting device comprising:

a cutting device main body having a motor;
a disc cutter blade that is rotated by the motor;
a fixed cover that is fixed to the cutting device main body to cover a part of an outer radial periphery of the disc cutter blade;
a base configured to support the cutting device main body such that an angle of the cutting device main body in an up-down direction relative to the base can be adjusted above the base, to adjust the extent to which the disc cutter blade projects in a downward direction beneath the base, wherein the base also supports the cutting device main body such that an angle in a right-left direction of the cutting device main body relative to the base can be adjusted to adjust a tilting angle of the disc cutter blade in the right-left direction;
an auxiliary cover (1) movably attached to the fixed cover to cover an outer radial periphery of the disc cutter blade between the fixed cover and the base in a cutting direction and (2) that includes (a) an angular guide that is attached to the base and (b) a dust cover that connects the angular guide and the cutting device main body;
and
an auxiliary cover moving mechanism that includes (1) a vertically elongated cam surface formed by the dust cover and (2) a cam follower comprising a pin protruding from the cutting device main body that interacts with the cam surface as the pin moves along the cam surface;
the cam surface includes a recessed portion of a rear edge of the dust cover in a front-to-rear direction;
and
the pin movably abuts the recessed portion of the cam surface.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/677,609Filed 15 Aug 2017
Priority: JP 2016-1707281 Sep 2016
Published: US 2018/0056543 A11 Mar 2018
Granted: 2 Jun 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

B27G 19/04
For circular saws: for manually-operated power-driven circular saws
B23D 47/12
Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts: of drives…
B23Q 5/10
Rotary shafts, e.g. working-spindles: driven essentially by electrical means
B27B 27/04
Guide fences or stops for timber in saw mills or sawing machines; Measuring equipment thereon: arranged perpendicularly to the plane of the saw blade