公开(公告)号：US20240391077A1

公开(公告)日：2024-11-28

申请号：US18662391

申请日：2024-05-13

Applicant: MAKITA CORPORATION

Inventor： Kiyonobu YOSHIKANE ,  Mizuki YAMAMOTO ,  Yoshitaka MACHIDA ,  Yusuke TAKANO

IPC: B25D11/04 ,  B25D11/06 ,  B25F5/00

Abstract: A hammer drill includes a boss sleeve rotatably and externally mounted to an intermediate shaft separately from the intermediate shaft. The boss sleeve includes a rod coupled to a rear end of a piston cylinder via a swash bearing. The boss sleeve is configured to rotate to convert a rotation of the intermediate shaft into a reciprocating motion in a front-rear direction of the rod and transmit the reciprocating motion to the piston cylinder. The hammer drill includes a second clutch disposed at the intermediate shaft. By performing a switch operation of a slide position of the second clutch, a hammer mode in which the second clutch is engaged with the boss sleeve to reciprocate the piston cylinder back and forth and another operation mode are selectable. The boss sleeve is rotatably cantilevered not to be in contact with the intermediate shaft by an inner housing via a bearing.

公开(公告)号：US20220250225A1

公开(公告)日：2022-08-11

申请号：US17575776

申请日：2022-01-14

Applicant: MAKITA CORPORATION

Inventor： Kiyonobu YOSHIKANE ,  Mizuki YAMAMOTO

IPC: B25D17/04

Abstract: An objective is to provide a technique to securely protect the striking tool even when the striking tool inadvertently falls down. A striking tool including a rotating shaft relatively rotatably connect a main body with a handle, a first elastic member reducing transmitting of vibration from the main body to the handle in a case that the handle relatively rotates to the main body, wherein the handle includes a battery mounting portion to which battery to drive the motor is attachable and the handle is arranged to relatively move to the main body across the rotating shaft, and an adjuster such that the relative movement amount of the handle to the main body in a predetermined direction is adjusted to be larger than the relative movement amount in a direction other than the predetermined direction.

公开(公告)号：US20220314414A1

公开(公告)日：2022-10-06

申请号：US17701074

申请日：2022-03-22

Applicant: MAKITA CORPORATION

Inventor： Kiyonobu YOSHIKANE ,  Mizuki YAMAMOTO

IPC: B25D17/08 ,  B23B31/107

Abstract: Two balls can reliably retract for smooth insertion of a tip tool into a tool holder. A hammer drill includes a tool holder, two balls in reception holes in the tool holder, a guide washer urging the balls forward in the reception holes with a coil spring, a pressure ring adjacent to a front of the guide washer, and an operation sleeve allowing the pressure ring to move backward and forward between locked and unlocked positions of the two balls. The guide washer includes, on its front surface, a projection toward the pressure ring to cause, with the pressure ring at the locked position, the guide washer to be inclined with respect to an axis of the tool holder for a first ball to move more backward than a second ball.

公开(公告)号：US20190314971A1

公开(公告)日：2019-10-17

申请号：US16289004

申请日：2019-02-28

Applicant: MAKITA CORPORATION

Inventor： Kiyonobu YOSHIKANE ,  Yoshiro TADA ,  Mizuki YAMAMOTO

IPC: B25D17/24 ,  B25D11/04 ,  B25D11/06

Abstract: An impact tool includes a tubular tool holder, a hammering mechanism, a resistor, and a biasing member. An impact element moves forward and rearward in conjunction with a piston. An intermediate element is housed movable back and forth between the impact element and a tip tool. The intermediate element abuts on a rear end of the tip tool to indirectly transmit a striking force from the impact element to the tip tool in a normal striking. The resistor is configured to abut on at least one of the intermediate element and the tip tool to apply a resistance to a front-rear movement of at least one of the intermediate element and the tip tool in a non-striking state. The biasing member disposed on the tool holder biases the resistor to a side of at least one of the intermediate element and the tip tool.

公开(公告)号：US20240326214A1

公开(公告)日：2024-10-03

申请号：US18406941

申请日：2024-01-08

Applicant: MAKITA CORPORATION

Inventor： Mizuki YAMAMOTO ,  Yoshitaka MACHIDA

IPC: B25D17/04 ,  B25D16/00

CPC classification number: B25D17/04 ,  B25D16/00

Abstract: A power tool can receive two different auxiliary handles in a replaceable manner. A power tool includes a tool body, a main handle, a cylindrical handle mount to which a first auxiliary handle or a second auxiliary handle is attachable and having a groove, the first auxiliary handle, and the second auxiliary handle. The first auxiliary handle includes an arc-shaped first band, a band holder that changes the diameter of the first band, and a first protrusion engageable with the groove. The second auxiliary handle includes an arc-shaped second band having a cutout in an axial direction, a fastener that changes the diameter of the second band, and a second protrusion engageable with the groove.

公开(公告)号：US20240149422A1

公开(公告)日：2024-05-09

申请号：US18380398

申请日：2023-10-16

Applicant: MAKITA CORPORATION

Inventor： Yoshitaka MACHIDA ,  Yusuke TAKANO ,  Takumi SUGISAKA ,  Mizuki YAMAMOTO ,  Makoto CHIKARAISHI

IPC: B25D17/04

CPC classification number: B25D17/043 ,  B25D16/006

Abstract: A reciprocating tool includes a body housing, a handle member and an elastic member. A first one of the body housing and the handle member includes a first coupling part, while a second one includes a second coupling part. The first coupling part includes an internal space, and an opening that communicates with the internal space and an outside space of the first coupling part. At least a portion of the second coupling part protrudes into the internal space through the opening and is movable relative to the first coupling part in the front-rear direction within the opening. The elastic member is disposed in the internal space and is configured to bias the first coupling part and the second coupling part such that the body housing and the handle member are biased away from each other in the front-rear direction.

公开(公告)号：US20230321776A1

公开(公告)日：2023-10-12

申请号：US18167554

申请日：2023-02-10

Applicant: MAKITA CORPORATION

Inventor： Mizuki YAMAMOTO ,  Yoshitaka MACHIDA ,  Kiyonobu YOSHIKANE

IPC: B23Q11/00 ,  B25D17/20

CPC classification number: B23Q11/0046 ,  B25D17/20 ,  B23Q11/0071 ,  B25D2217/0065

Abstract: A dust collection cup allows a bit tip to be viewable without being detached or replaced. A dust collection cup is attachable to a front cylindrical portion of a hammer drill. The dust collection cup in an attached state allows a bit attached to the front cylindrical portion to extend through the dust collection cup. The dust collection cup includes an attachment attachable to the front cylindrical portion, and a body connectable to the attachment. The body includes an extendable unit including at least a portion in an axial direction retaining a predetermined length.

公开(公告)号：US20200331135A1

公开(公告)日：2020-10-22

申请号：US16809636

申请日：2020-03-05

Applicant: MAKITA CORPORATION

Inventor： Kiyonobu YOSHIKANE ,  Mizuki YAMAMOTO

IPC: B25D11/04 ,  B25D11/06

Abstract: A striking tool restricting movement of an intermediate member toward a striker reliably prevents no-load strokes. A hammer drill includes a cylindrical tool holder holding a tip tool, a motor, a piston that reciprocate with rotation from the motor, a striker that reciprocate in cooperation with the piston, an intermediate member reciprocably accommodated in the tool holder between the striker and the tip tool and in contact with a rear end of the tip tool at a normal strike to indirectly transmit a strike from the striker to the tip tool, and at least two ring members that move in a front-rear direction accommodated in the tool holder at a front of the intermediate member between the tool holder and the intermediate member. At least one ring member is made of metal.