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公开(公告)号：US09869235B2
公开(公告)日：2018-01-16
申请号：US14850452
申请日：2015-09-10
Applicant: MAKITA CORPORATION
Inventor： Yoshiaki Takayanagi
IPC: F02B25/14 , F02B25/20 , F02F3/24 , F02B25/22 , F02B43/02 , F02F7/00 , F02B33/04 , F02B33/30 , F02M35/10 , F02B75/02
CPC classification number: F02B25/20 , F02B25/14 , F02B25/22 , F02B33/04 , F02B33/30 , F02B43/02 , F02B75/02 , F02B2075/025 , F02B2700/037 , F02F3/24 , F02F7/0036 , F02M35/1017 , F02M35/10275
Abstract: A stratified scavenging two-stroke engine includes a first scavenging passage that extends from a first scavenging intake that opens to the inside of the crankcase to a scavenging port that opens to the inside of a cylinder, and a second scavenging passage that branches from the first scavenging passage and extends to a second scavenging intake that opens to the inside of the crankcase. An air passage is provided to supply air for pre-scavenging into the first scavenging passage at a position closer to the first scavenging intake than a position at which the second scavenging passage branches from the first scavenging passage. A first check valve inhibits a flow of air from the first scavenging passage during an upward stroke of the piston, and a second check valve inhibits a flow of air and a gaseous mixture from the first scavenging passage during a downward stroke of the piston.
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公开(公告)号：US09249716B2
公开(公告)日：2016-02-02
申请号：US14280962
申请日：2014-05-19
Applicant: MAKITA CORPORATION
Inventor： Yoshiaki Takayanagi
CPC classification number: F02B25/06 , F02B25/16 , F02B25/22 , F02B75/02 , F02B2075/025
Abstract: A two-stroke engine is provided with a scavenging passage that extends between a scavenging intake that opens into a crankcase and a scavenging port that opens into a cylinder, and an air passage that is connected to an intermediate position of a scavenging passage for introducing air into the scavenging passage. A first check valve that is disposed within a section of a scavenging passage between a scavenging intake and the intermediate position. A second check valve that is disposed within the air passage. The section of the scavenging passage between the intermediate position and the scavenging intake, the air passage, and a mixture gas passage are arranged in a substantially same direction with respect to a longitudinal axis of the cylinder.
Abstract translation: 二冲程发动机设有扫气通道，该通风通道在通向曲轴箱的扫气入口与通向气缸的扫气口之间延伸;以及空气通道，其连接到用于引入空气的扫气通道的中间位置 进入清扫通道。 第一止回阀，设置在扫气通道的清扫进气口和中间位置之间的一段内。 设置在空气通道内的第二止回阀。 中间位置与扫气入口，空气通道和混合气体通道之间的扫气通道的截面相对于气缸的纵向轴线大致相同的方向排列。
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公开(公告)号：US09903397B2
公开(公告)日：2018-02-27
申请号：US14818685
申请日：2015-08-05
Applicant: MAKITA CORPORATION
Inventor： Yoshiaki Takayanagi , Hiroki Nagase
Abstract: The present invention relates to an oil pump for use in and attached to a device (e.g., chain saw) having an oil-supplied portion requiring an oil supply. An oil pump supplies lubricating oil to a guide groove of a guide bar in such a manner that a plunger having a gear portion meshing with a drive worm provided on a chain saw reciprocally moves in a pump body while rotating. Two guide pins for positioning an oil pump when attaching the oil pump to a chain saw body are provided on an attachment surface of the pump body to the chain saw body. The two guide pins are spaced apart in an axial direction of the plunger, each disposed on a centerline of a transverse cross section of the plunger.
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Patent Agency Ranking
公开(公告)号：US09573208B2
公开(公告)日：2017-02-21
申请号：US14203995
申请日：2014-03-11
Applicant: MAKITA CORPORATION
Inventor： Yoshiaki Takayanagi , Masashi Sugiyama
CPC classification number: B23D57/023
Abstract: A portable working machine includes a working machine body, bolt members erected on the working machine body, a cover member configured to be attachable to and detachable from the working machine body, in which the cover member has through-holes through which the bolt members are inserted when attaching the cover member, fixing members configured to be fastened to the bolt members to fix the cover member attached to the working machine body, and a holding member attached to an outer surface of the cover member with a predetermined gap space between the holding member and the outer surface of the cover member, in which the holding member is configured to retain the fixing members on an outer side of the outer surface of the cover member when a fastening of the fixing members to the bolt members is released to prevent the fixing members from dropping off the cover member.
Abstract translation: 一种便携式作业机械，包括工作机体，竖立在作业机体上的螺栓构件，构造成可附接到作业机体上并从工作机体拆卸的盖构件，其中，盖构件具有通孔，螺栓构件 当安装所述盖构件时插入，所述固定构件被构造成紧固到所述螺栓构件以固定安装在所述作业机体上的所述盖构件;以及保持构件，其在所述保持构件的外表面之间具有预定的间隙空间， 构件和外壳的外表面，其中当将固定构件紧固到螺栓构件时，保持构件被构造成将固定构件保持在盖构件的外表面的外侧上，以防止 固定构件从盖构件脱落。
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公开(公告)号：US09206736B2
公开(公告)日：2015-12-08
申请号：US14100465
申请日：2013-12-09
Applicant: MAKITA CORPORATION
Inventor： Yoshiaki Takayanagi , Hideyuki Nakadachi , Kohei Oda
CPC classification number: F02B25/20 , F02B25/14 , F02B25/22 , F02B33/04 , F02B33/30 , F02B43/02 , F02B75/02 , F02B2075/025 , F02B2700/037 , F02F3/24 , F02F7/0036 , F02M35/1017 , F02M35/10275
Abstract: A stratified scavenging two-stroke engine includes a first scavenging passage that extends from a first scavenging intake that opens to the inside of the crankcase to a first scavenging port that opens to the inside of a cylinder, and a second scavenging passage that extends from a second scavenging intake that opens to the inside of the crankcase to a second scavenging port that opens to the inside of the cylinder. The first and second passages are formed so as to communicate with each other via a communicating portion. An air passage is connected to the first passage at a position closer to the first scavenging intake than the communicating portion. A first check valve inhibits a flow from the first passage to the inside of the crankcase, and a second check valve inhibits a flow from the first passage through the air passage to the outside.
Abstract translation: 分层扫气二冲程发动机包括：第一扫气通道，其从开口到曲轴箱内部的第一扫气入口延伸到通向气缸内部的第一扫气口;以及第二扫气通道，其从一 第二清扫入口，其向曲轴箱内部通向到通向气缸内部的第二扫气口。 第一通道和第二通道形成为经由连通部分彼此连通。 空气通道与第一通道连通，在比第一通气部分靠近第一扫气入口的位置处。 第一止回阀阻止从第一通道到曲轴箱内部的流动，并且第二止回阀阻止从第一通道通过空气通道到外部的流动。
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公开(公告)号：US10759570B2
公开(公告)日：2020-09-01
申请号：US16131422
申请日：2018-09-14
Applicant: MAKITA CORPORATION
Inventor： Yoshiaki Takayanagi
Abstract: The present invention relates to a tank cap including a lever member that is constrained from moving to the standing position contrary to the intention of the operator. The tank cap comprises a slide member disposed in the cap body so as to be adjacent to the lever member, and provided with a cam contact portion that is to come into contact with a cam portion of the lever member, and a coil spring disposed between the slide member and the bottom of the cap body. The resilience of the coil spring causes the cam contact portion to press the cam portion and retains the retracted position.
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公开(公告)号：US09718208B2
公开(公告)日：2017-08-01
申请号：US14220283
申请日：2014-03-20
Applicant: MAKITA CORPORATION
Inventor： Yoshiaki Takayanagi , Masashi Sugiyama
IPC: B27B17/14
CPC classification number: B27B17/14
Abstract: In a chain saw, an operating shaft member axially rotated by a manual operation of a rotating lever is disposed so that an axial direction thereof may be inclined against an attaching surface of a guide bar in which a saw chain is wound around a circumference thereof, a driving bevel gear attached to an end portion of the operating shaft member meshes with a driven bevel gear attached to an end portion of a rotating shaft member, and the rotating shaft member is axially rotated. Thus, the guide bar is moved in a longitudinal direction thereof to adjust tension of the saw chain.
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公开(公告)号：US09676115B2
公开(公告)日：2017-06-13
申请号：US14220271
申请日：2014-03-20
Applicant: MAKITA CORPORATION
Inventor： Yoshiaki Takayanagi , Masashi Sugiyama
IPC: B27B17/14
CPC classification number: B27B17/14
Abstract: To provide an operation lever including a first lever that has a base end portion swingably supported to a peripheral portion of a nut member for fastening a guide bar in a chain saw, and a second lever that is engaged with the first lever in a manner slidable in an axial direction. The operation lever can be placed in a receiving portion of the nut member with an axial length thereof shortened, and can be manipulated to rotate the nut member by being gripped on an outer end portion of the second lever in a state in which the operation lever is lifted out from the receiving portion and the axial length is lengthened. Thus, a sufficient fastening force for the guide bar can be obtained, and operability can be improved.
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