# US 2019/0314943 A1 · Dust collector for electric power tool, electric power tool, and dust collection system

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- Number: US 2019/0314943 A1
- Document ID: US20190314943A1
- Status: Published application
- Kind: A1
- Application number: 16/455,842
- Filed: 2019-06-28
- Published: 2019-10-17
- Earliest claimed: 2016-01-20
- Assignees: Makita Corporation
- Applicants: Makita Corporation
- Inventors: Yoshitaka MACHIDA; Kiyonobu YOSHIKANE
- Web page: https://patentgrep.com/patent/US20190314943A1

## CPC

- B23Q 11/0071: {dust collectors for hand tools}
- B01D 45/16: generated by the winding course of the gas stream {, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes}
- B01D 46/0027: {with additional separating or treating functions}
- B01D 46/10: Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B23Q 11/0046: {by sucking}
- B25F 5/02: Construction of casings, bodies or handles {(B25F5/006, B25F5/008 take precedence)}
- B23Q: DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING (tools of the kind used in lathes or boring machines B23B27/00); MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- B25F: COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR {(machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass B23P23/00 and subgroups)}

## Abstract

A dust collector for an electric power tool includes a main body case, a dust box, a sliding portion, and a dust collecting route. The main body case includes an exhaust port, the main body case being configured to be installed on an electric power tool. The dust box internally includes a filter. The sliding portion is disposed on the main body case. The sliding portion has a front end on which a nozzle with a suction opening is disposed. The sliding portion is slidable in a front-rear direction. The dust collecting route is from the suction opening to the exhaust port passing through the filter. The main body case includes a guiding portion through which the sliding portion passes, and the guiding portion allows the sliding portion to project rearward when the sliding portion slides.

## Claims

### Claim 1

A dust collecting system for an electric power tool, comprising:
an electric power tool including a suction fan housed inside a housing to be rotated by a motor drive, a power-tool-side intake port formed on the housing and communicating with the suction fan, a shutter member provided in the housing and configured to open and close the power-tool-side intake port, in which the electric power tool includes an intake route extending from the power-tool-side intake port to the suction fan; and
a dust collector for an electric power tool, the dust collector including a main body case that is mounted to the electric power tool and that includes a nozzle having a suction opening at a front end, a dust box internally including a filter, a contact member brought in contact with the shutter member, a dust-collector-side exhaust port disposed oppositely to the power-tool-side intake port, in which the dust collector includes a dust collecting route extending from the suction opening to the dust-collector-side exhaust port through the filter, wherein
in a state where the main body case of the dust collector is installed on the housing of the electric power tool, the shutter member with which the contact member is brought contact releases the power-tool-side intake port such that the dust collecting route is communicated with the intake route,
the main body case includes a through hole,
the dust box includes the exhaust port disposed oppositely to the power-tool-side intake port via the through hole and a sealing member configured to seal between the power-tool-side intake port and the dust-collector-side exhaust port in a state where the main body case is installed on the housing, and
the contact member is disposed in an area surrounded by the sealing member.

### Claim 2

A dust collecting system for an electric power tool, comprising:
an electric power tool including a suction fan housed inside a housing to be rotated by a motor drive, a power-tool-side intake port formed on the housing and communicating with the suction fan, a shutter member provided in the housing and configured to open and close the power-tool-side intake port, in which the electric power tool includes an intake route extending from the power-tool-side intake port to the suction fan; and
a dust collector for an electric power tool, the dust collector including a main body case that has a dust-collector-side exhaust port disposed oppositely to the power-tool-side intake port and that is mounted to the electric power tool, a dust box internally including a filter, a nozzle disposed on the main body case and having a suction opening at a front end of the nozzle, a contact member brought in contact with the shutter member, in which the dust collector includes a dust collecting route extending from the suction opening to the dust-collector-side exhaust port through the filter, wherein
in a state where the main body case of the dust collector is installed on the housing of the electric power tool, the shutter member with which the contact member is brought contact releases the power-tool-side intake port such that the dust collecting route is communicated with the intake route,
the main body case includes a scaling member that surrounds the dust-collector-side exhaust port to seal between the power-tool-side intake port and the dust-collector-side exhaust port in a state where the main body case is installed on the housing, and
the contact member is disposed in an area surrounded by the sealing member.

### Claim 3 (depends on 1)

The dust collecting system for the electric power tool according to claim 1, wherein
the contact member is formed as a separate member that is assembled on the dust box.

### Claim 4 (depends on 1)

The dust collecting system for the electric power tool according to claim 1, wherein
the dust box includes a filter housing portion that accommodates a filter and a cap cover that retains the filter in the filter housing portion, and the contact member is provided in the cap cover.

### Claim 5 (depends on 1)

The dust collecting system for the electric power tool according to claim 1, wherein
the shutter member is disposed movably back and forth between an advance position obstructing the power-tool-side intake port and a retreated position opening the power-tool-side intake port, and the contact member is brought in contact with the shutter member, moving to the retreated position to open the power-tool-side intake port.

### Claim 6 (depends on 5)

The dust collecting system for the electric power tool according to claim 5, wherein
air suctioned from the power-tool-side intake port into the housing passes through right and left of the shutter member to reach the suction fan.

### Claim 7 (depends on 1)

The dust collecting system for the electric power tool according to claim 1, wherein
an extended portion is formed integrally with the sealing member to be locked to the contact member, and locking of the contact member prevents the sealing member from falling out from a side of the main body case.

### Claim 8 (depends on 1)

The dust collecting system for the electric power tool according to claim 1, wherein
the main body case includes a first locking portion and a second lock portion,
the first locking portion locking to a first receiving portion disposed on the housing, and the second lock portion being rotated to the side of the main body case in a state where the first locking portion is locked to the first receiving portion so as to be locked to a second receiving portion disposed on the main body case in a mounting position to the main body case.

### Claim 9 (depends on 8)

The dust collecting system for the electric power tool according to claim 8, wherein
the second receiving portion is formed as a pair of locking depressed portions disposed on right and left sides of the power-tool-side intake port, and
the second lock portion is formed as a pair of hooks that are disposed on right and left sides of the dust-collector-side exhaust port, configured to be movable between a lock position locking to the locking depressed portions and a release position unlocking the locking depressed portions, and configured to be biased to the lock position.

### Claim 10 (depends on 9)

The dust collecting system for the electric power tool according to claim 9, wherein
the pair of hooks are configured to be operably movable to the release position simultaneously by one operating unit.