# US 10,321,596 B2 · Job-site electric apparatus and method for reducing invasion of foreign matter into job-site electric apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,321,596 B2 - Document ID: US10321596B2 - Status: Granted - Kind: B2 - Application number: 15/718,589 - Filed: 2017-09-28 - Published: 2018-04-05 - Granted: 2019-06-11 - Earliest claimed: 2016-09-30 - Assignees: Makita Corporation - Applicants: Makita Corporation - Inventors: Kazuki Oguchi; Goshi Ishikawa; Nobuaki Kawatani - Web page: https://patentgrep.com/patent/US10321596B2 ## CPC - H05K 5/069: {Other details of the casing, e.g. wall structure, passage for a connector, a cable, a shaft} - G01C 15/00: Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00 - G01D 11/24: Housings {; Casings for instruments} - H01R 13/5205: {Sealing means between cable and housing, e.g. grommet (H01R13/5221 takes precedence)} - H01R 13/5219: {Sealing means between coupling parts, e.g. interfacial seal} - H01R 33/965: Dustproof, splashproof, drip-proof, waterproof, or flameproof holders - H05K 5/0086: {portable, e.g. battery operated apparatus (casings for switching devices H01H9/02)} - H05K 5/0217: {Mechanical details of casings (covers, lids, hoods or members for covering apertures H05K5/03)} - H05K 5/023: {Handles; Grips} - H05K 5/0247: {Electrical details of casings, e.g. terminals, passages for cables or wiring} - G01C 15/004: {Reference lines, planes or sectors} - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - G01C: MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY (measuring liquid level G01F; radio navigation, determining distance or velocity by use of propagation effects, e.g. Doppler effects, propagation time, of radio waves, analogous arrangements using other waves G01S) - G01D: MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR - H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS ## Abstract A job-site electric apparatus in one aspect the present disclosure includes a housing, an operation device, a terminal, a separator, a coupling device, and a sealing portion. The separator is configured to separate the housing into a first area and a second area, and includes a through hole that allows communication between the first area and the second area. The first area includes the operation device. The second area includes the terminal. The coupling device passes through the through hole and electrically couple the terminal to the operation device. The sealing portion seals the through hole through which the coupling device passes. ## Claims ### Claim 1 A job-site electric apparatus comprising: a housing; an operation device configured to operate by receiving supply of electric power; a terminal configured to receive supply of the electric power from a battery pack; a separator configured to separate the housing into a first area and a second area, and including a through hole that allows communication between the first area and the second area, the first area including the operation device, and the second area including the terminal; a coupling device configured to pass through the through hole and electrically couple the terminal to the operation device; and a sealing portion configured to seal the through hole through which the coupling device passes. ### Claim 2 (depends on 1) The job-site electric apparatus according to claim 1, further comprising: a terminal holder configured to hold the terminal, wherein the housing is configured to retain the operation device and the terminal holder. ### Claim 3 (depends on 2) The job-site electric apparatus according to claim 2, wherein the terminal holder is configured to cover a part of the terminal. ### Claim 4 (depends on 2) The job-site electric apparatus according to claim 2, wherein the housing includes a retainer configured to retain the terminal holder at a specified position, and wherein the terminal holder is mounted to the housing by being retained by the retainer. ### Claim 5 (depends on 4) The job-site electric apparatus according to claim 4, wherein the separator includes a combination of a plurality of components. ### Claim 6 (depends on 5) The job-site electric apparatus according to claim 5, wherein the retainer includes a plurality of members, each member being provided to one component of the plurality of components, and wherein the plurality of members are combined to retain the terminal holder at the separator formed by the combination of the plurality of components. ### Claim 7 (depends on 6) The job-site electric apparatus according to claim 6, wherein the plurality of members are arranged in the second area and combined to retain the terminal holder at the separator formed by the combination of the plurality of components. ### Claim 8 (depends on 2) The job-site electric apparatus according to claim 2, wherein the terminal holder is mounted to the housing with some freedom of movement. ### Claim 9 (depends on 2) The job-site electric apparatus according to claim 2, wherein the housing is configured to retain the operation device in the first area and the terminal holder in the second area. ### Claim 10 (depends on 1) The job-site electric apparatus according to claim 1, wherein the coupling device includes a deformable part. ### Claim 11 (depends on 10) The job-site electric apparatus according to claim 10, wherein the deformable part includes a part of a section from the sealing portion to the terminal. ### Claim 12 (depends on 1) The job-site electric apparatus according to claim 1, wherein the housing includes a mounting portion configured to attachably and detachably hold the battery pack. ### Claim 13 (depends on 1) The job-site electric apparatus according to claim 1, wherein the housing includes a cylindrical portion having a substantially cylindrical shape. ### Claim 14 (depends on 13) The job-site electric apparatus according to claim 13, wherein the separator is provided in the housing such that when the housing is projected onto a plane having a normal that coincides with an axis of the cylindrical portion, a part of the separator is positioned inside the cylindrical portion. ### Claim 15 A method for reducing invasion of foreign matter into a job-site electric apparatus, the method comprising: providing a separator in a housing of the job-site electric apparatus so as to separate the housing into a first area and a second area, the first area including an operation device of the job-site electric apparatus configured to operate by receiving supply of electric power, the second area including a terminal configured to receive supply of electric power from a battery pack, and the separator including a through hole that allows communication between the first area and the second area; electrically coupling the terminal to the operation device through the through hole; and sealing the through hole through which the terminal and the operation device are electrically coupled.