Patents Assigned to Daido Metal Company
  • PLAIN BEARING AND BEARING DEVICE
    Publication number: 20130223776
    Abstract: A plain bearing for supporting a crank shaft of an internal combustion engine is provided. The plain bearing is constituted by a pair of semicylindrical members. A crush relief is formed in an inner circumferential surface of the semicylindrical member, and a main cylindrical surface is formed in a region aside from the crush relief. The crush relief includes an outwardly convex curved surface and an inwardly convex curved surface.
    Type: Application
    Filed: February 12, 2013
    Publication date: August 29, 2013
    Applicant: DAIDO METAL COMPANY LTD.
    Inventor: DAIDO METAL COMPANY LTD.
  • SPLIT-TYPE SLIDING BEARING FOR CRANKSHAFT IN INTERNAL COMBUSTION ENGINE AND SPLIT-TYPE SLIDING BEARING DEVICE
    Publication number: 20130209014
    Abstract: A split-type sliding bearing for a crankshaft in an internal combustion engine incorporated in a split-type bearing housing. The sliding bearing consists of a pair of semi-cylindrical bearing bodies combined with each other to form a cylindrical body. The bearing housing has a cylindrical bearing retaining bore and consists of a pair of housing halves. One of the housing halves has a relatively lower stiffness, and the other has a relatively higher stiffness. One of the bearing bodies is held by the housing half having a relatively lower stiffness. The other bearing body is held by the housing half having a relatively higher stiffness. The bearing bodies have an equal outer diameter to each other, and both of the circumferential end parts of one bearing body have a larger thickness than those of the other bearing body prior to incorporation into the housing halves.
    Type: Application
    Filed: January 25, 2013
    Publication date: August 15, 2013
    Applicant: DAIDO METAL COMPANY LTD.
    Inventor: DAIDO METAL COMPANY LTD.
  • Manufacturing method of half bearing and half plain bearing
    Patent number: 8500335
    Abstract: A half plain bearing that has a positioning member with a novel construction, and a manufacturing method of the half plain bearing are proposed. If part of a material from which a bearing body 13 is formed is allowed to escape to outside of a tool with a narrow width when pressed by the tool, an amount of protrusion needed for a positioning member 20 to perform a function thereof (an amount of protrusion from an outer peripheral face of the bearing body) can be ensured while suppressing an amount of deformation of the material from which the bearing body 13 is formed in a circumferential direction thereof. The positioning member 20 of the half plain bearing thus formed has a flat portion 21a and a protrusion portion 22. A tip of the protrusion portion 22 is located on a mating face side with respect to a virtual plane that includes the flat portion 21a.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: August 6, 2013
    Assignee: Daido Metal Company Ltd.
    Inventors: Michitoshi Inagaki, Tsuyoshi Nakashima
  • MAIN BEARING FOR CRANKSHAFT OF INTERNAL COMBUSTION ENGINE
    Publication number: 20130182981
    Abstract: A main bearing for a crankshaft of an internal combustion engine is composed of a pair of semi-cylindrical bearings. An oil groove extending in a circumferential direction is formed on an inner circumferential surface of one semi-cylindrical bearing. The oil groove has the depth gradually decreasing toward a circumferential end surface of the one semi-cylindrical bearing, and defines a circumferential end portion on the circumferential surface without extending to an axial groove formed in a joint portion of the pair of semi-cylindrical bearings. An extension portion of the inner circumferential surface extends between the circumferential end portion and the axial groove, and a plurality of circumferential grooves extending in the circumferential direction is formed on the extension portion from the oil groove to the axial groove over an entire width of the circumferential end portion of the oil groove.
    Type: Application
    Filed: January 11, 2013
    Publication date: July 18, 2013
    Applicant: DAIDO METAL COMPANY LTD.
    Inventor: DAIDO METAL COMPANY LTD.
  • HALVED SLIDING BEARING AND METHOD FOR PRODUCING SAME
    Publication number: 20130163904
    Abstract: A halved sliding bearing (1) has a recess (7) formed in a circumferential direction from an outer peripheral edge of a mating surface (5) of a semi-cylindrical bearing main body (3). To prevent formation of a burr to an inside of the recess (7) during formation of the mating surface (5), an entirety of at least one edge segment of a peripheral edge of the recess (7) opening on a circumferential end surface of a semi-cylindrical member (23) as an unprocessed body of the bearing main body (3), the at least one edge segment intersecting with an axial direction of the member (23), is chamfered. The mating surface is formed by cutting the circumferential end surface such that a cutting blade (31) firstly reaches the chamfered edge in the peripheral edge of the recess (7). Thus, the bearing main body is produced.
    Type: Application
    Filed: April 2, 2012
    Publication date: June 27, 2013
    Applicant: DAIDO METAL COMPANY LTD.
    Inventors: Hiroshi Kaneko, Michitoshi Inagaki, Tsuyoshi Nakashima
  • MAIN BEARING FOR CRANKSHAFT OF INTERNAL COMBUSTION ENGINE
    Publication number: 20130156358
    Abstract: A main bearing for a crankshaft of an internal combustion engine comprises a pair of semi-cylindrical bearings. An oil groove extends on an inner circumferential surface of one semi-cylindrical bearing in a circumferential direction so that the center thereof in an axial direction aligns with that of an inlet opening of a lubricating oil path in a journal section of the crankshaft. The oil groove does not extend up to an axial direction groove formed at a joint portion of the semi-cylindrical bearings so that a separation inner circumferential surface extends between a circumferential direction end portion of the oil groove and the axial direction groove. The length of the separation inner circumferential surface is smaller than that of the inlet opening in the circumferential direction.
    Type: Application
    Filed: December 6, 2012
    Publication date: June 20, 2013
    Applicant: DAIDO METAL COMPANY LTD.
    Inventor: DAIDO METAL COMPANY LTD.
  • Crankshaft bearing for internal combustion engine
    Patent number: 8449193
    Abstract: Disclosed is a crankshaft bearing for an internal combustion engine. At the inner periphery of the semicircular thrust bearing, two impact load receiving projections are projected besides the two tabs. Each of at least the two impact load receiving projections is between each of the two tabs and each of the circumferential end surfaces of the semicircular thrust bearing. The two impact load receiving projections are at line-symmetrical positions with each other with respect to the center line of the semicircular thrust bearing. A height of the impact load receiving projection is set at a dimension such that a top portion of the impact load receiving projection is not in contact with an outer circumferential surface of the semi-cylindrical sliding bearing in a static state in which the pair of semi-cylindrical sliding bearings is assembled into the bearing housing of the crankshaft and restrained.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: May 28, 2013
    Assignee: Daido Metal Company
    Inventors: Aisuke Kuwabara, Takahiko Mizuno
  • SLIDING MEMBER
    Publication number: 20130121628
    Abstract: Slide member is provided with an Al-based bearing alloy layer including Al and Si particles, and DLC layer laminated over Al-based bearing alloy layer. At least some of the Si particles included in Al-based bearing alloy layer are exposed on DLC layer side surface.
    Type: Application
    Filed: July 7, 2011
    Publication date: May 16, 2013
    Applicant: DAIDO METAL COMPANY LTD.
    Inventors: Shigeru Inami, Koji Zushi, Yukihiko Kagohara
  • SLIDING MEMBER
    Publication number: 20130108198
    Abstract: Slide member is provided with an Cu-based bearing alloy layer including hard particles, and DLC layer laminated over Cu-based bearing alloy layer. At least some of the hard particles included in Cu-based bearing alloy layer are exposed on DLC layer side surface.
    Type: Application
    Filed: July 7, 2011
    Publication date: May 2, 2013
    Applicant: DAIDO METAL COMPANY LTD.
    Inventors: Koji Zushi, Shigeru Inami, Yukihiko Kagohara
  • Sliding resin composition
    Patent number: 8420580
    Abstract: A sliding resin composition is provided which hardly seizes by decreasing oil repellency of PTFE to prevent discharging of lubricating oil from sliding surface. That is, by using resin composition 1 where particles of PTFE 3 in the surface of which inorganic compound 4 having oil-absorptivity is embedded are dispersed in synthetic resin 2, the inorganic compound 4 having oil-absorptivity absorbs and retains lubricating oil, and oil repellency of PTFE 3 on the sliding surface can be decreased. Thus, discharging of the lubricating oil from the sliding surface can be inhibited and resin composition 1 hardly seizes.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: April 16, 2013
    Assignee: Daido Metal Company
    Inventors: Hideki Iwata, Seiji Amano
  • Sliding bearing for internal combustion engine and sliding bearing device
    Patent number: 8419285
    Abstract: Disclosed is a sliding bearing consisting of a pair of semi-cylindrical bearings for supporting a crankshaft or a crank pin in an internal combustion engine. The sliding bearing is incorporated in a split-type bearing housing. One of the semi-cylindrical bearings being incorporated in at least one of the pair of housing halves, which one housing half has a relatively higher stiffness, is provided with a number of circumferential grooves on an inner surface of the semi-cylindrical bearing so as to extend circumferentially along the inner surface of the semi-cylindrical bearing. The circumferential grooves existing at least one circumferential end region of the inner surface of the semi-cylindrical bearing have a depth of not less than 10 ?m, the circumferential end region including a circumferential bearing end face orientating a direction opposite to the rotation direction of the shaft or pin.
    Type: Grant
    Filed: November 12, 2009
    Date of Patent: April 16, 2013
    Assignee: Daido Metal Company Ltd.
    Inventors: Osamu Ishigo, Atsushi Okado
  • COPPER-BASED SLIDE MEMBER
    Publication number: 20130089459
    Abstract: In a copper-based slide member in which needle-shaped Mn—Si based compounds are dispersed in a brass structure, 50% or more of a total number of the needle-shaped Mn—Si based compounds having lengths of 50 ?m or more in a major axis direction are constituted of a plurality of small particles. Thereby, even if the needle-shaped Mn—Si based compounds fall off during sliding, the small particles which constitute the needle-shaped Mn—Si based compounds may fall off. Thus, the frequency of falling off of the coarse needle-shaped Mn—Si based compound which damages a shaft and a bearing is decreased. Therefore, seizure hardly occurs.
    Type: Application
    Filed: October 2, 2012
    Publication date: April 11, 2013
    Applicant: DAIDO METAL COMPANY LTD.
    Inventor: DAIDO METAL COMPANY LTD.
  • Sliding resin composition
    Patent number: 8415281
    Abstract: A sliding resin composition is provided which rapidly forms a transfer adhesion film of PTFE on the surface of a counter member at the initial stage of sliding. That is, in the case of using resin composition 1 which is in such a state that particles of PTFE 3 having PTFE film forming agent 4 embedded are dispersed in synthetic resin 2, when the surface of particles of PTFE 3 on the sliding surface of resin composition 1 contacts with the surface of an associated shaft, the PTFE film forming agent 4 is also present at the contact portion, whereby transfer adhesion of PTFE 3 to the surface of the associated shaft is accelerated and thus the time required for decrease of coefficient of friction can be shortened.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: April 9, 2013
    Assignee: Daido Metal Company Ltd.
    Inventor: Hideki Iwata
  • Bearing for connecting rod of internal combustion engine
    Patent number: 8408799
    Abstract: A connecting rod bearing is constituted of a pair of semi-cylindrical bearings I and II. In a state in which the semi-cylindrical bearings are assembled into a cylindrical shape, along two contact surfaces C of circumferential end surfaces, first axial oil grooves E are formed to be located at a central portion in a bearing width direction, and second axial oil grooves F are formed to be located at both sides in the bearing width direction of each of the first axial oil grooves E. One of the first axial oil grooves E and two of the second axial oil grooves F are in relation to communicate with each other. The first axial oil groove E is formed in the range of the wall thickness decreasing region surface A.
    Type: Grant
    Filed: August 12, 2010
    Date of Patent: April 2, 2013
    Assignee: Daido Metal Company Ltd.
    Inventors: Osamu Ishigo, Atsushi Okado
  • CONNECTING ROD BEARING OF INTERNAL COMBUSTION ENGINE
    Publication number: 20130064487
    Abstract: Disclosed is a connecting rod bearing for a crankshaft of an internal combustion engine, the connecting rod bearing comprising a pair of semi-cylindrical bearings. In at least one of the semi-cylindrical bearings, a front side circumferential groove is formed from the front side circumferential end surface, and in the opposed semi-cylindrical bearing, a rear side circumferential groove is formed from the rear side circumferential end surface. A circumferential length of the front side circumferential groove is larger than a circumferential length of the front side crush relief, and a circumferential length of the rear side circumferential groove is smaller than a circumferential length of the rear side crush relief.
    Type: Application
    Filed: August 29, 2012
    Publication date: March 14, 2013
    Applicant: Daido Metal Company Ltd.
    Inventor: Osamu Ishigo
  • CONNECTING ROD BEARING OF INTERNAL COMBUSTION ENGINE
    Publication number: 20130064486
    Abstract: Disclosed is a connecting rod bearing for a crankshaft of an internal combustion engine, the connecting rod bearing comprising a pair of semi-cylindrical bearings. In at least one of the semi-cylindrical bearings, a front side circumferential groove is formed from the front side circumferential end surface, and in the opposed semi-cylindrical bearing, a rear side circumferential groove is formed from the rear side circumferential end surface. In a communicating portion where the front side circumferential groove, the rear side circumferential groove, and the axial groove communicate with one another, a depth of the front side circumferential groove is larger than a depth of the rear side circumferential groove, whereby a step portion in a depth direction of the circumferential grooves is formed.
    Type: Application
    Filed: August 29, 2012
    Publication date: March 14, 2013
    Applicant: Daido Metal Company Ltd.
    Inventor: Osamu Ishigo
  • Sliding bearing used in turbocharger of internal combustion engine
    Patent number: 8388228
    Abstract: Disclosed is a sliding bearing used in turbochargers of internal combustion engines. It is formed with a copper alloy containing, by mass %, 25 to 45% Zn, 0.3 to 2.0% Si, 1.5 to 6.0% Mn, and the balance being Cu and unavoidable impurities. The sliding bearing has a cylindrical shape for supporting a rotating shaft. Crystallized Mn—Si compounds are dispersed in a matrix of the copper alloy, the compounds extending in an axial direction of the rotating shaft on a sliding surface of the sliding bearing. The crystallized Mn—Si compounds have an average inter-grain distance of 20 to 80 ?m. The matrix may contain precipitated Mn—Si compounds as well as the crystallized Mn—Si compounds.
    Type: Grant
    Filed: March 1, 2011
    Date of Patent: March 5, 2013
    Assignee: Daido Metal Company Ltd.
    Inventors: Kazuaki Toda, Shinji Ochi
  • COPPER-BASED SLIDING MATERIAL
    Publication number: 20130052480
    Abstract: A copper-based sliding material including a steel back metal layer and a Cu alloy layer is provided. The Cu alloy layer contains 0.5 to 15 mass % of Sn, 0.2 to 5 mass % of inorganic compound particles and the balance being Cu and unavoidable impurities. The inorganic compound particles are dispersed in a Cu alloy matrix and have an average size of 1 to 10 ?m. A ratio of a true density of the Cu alloy matrix in relation to that of the inorganic compound particles is 0.6 to 1.4 and a ratio of a thermal expansion coefficient of the Cu alloy matrix in relation to that of the inorganic compound particles is 1.5 to 3.0. An average distance between the inorganic compound particles dispersed in the Cu alloy matrix is 5 to 50 ?m.
    Type: Application
    Filed: August 22, 2012
    Publication date: February 28, 2013
    Applicant: Daido Metal Company Ltd.
    Inventors: Kentaro Tujimoto, Kazuaki Toda
  • COPPER-BASED SLIDING MATERIAL
    Publication number: 20130052473
    Abstract: In a copper-based sliding material in which a Cu alloy layer contains 5% to 30% by mass of Bi, and the balance consisting of Cu and an unavoidable impurity, Bi is dispersed as particles of a Bi phase in the Cu alloy layer, and the mass ratio of the particles having a particle size of 2 to 50 ?m and a circularity of 0.1 to 0.7 is 30% or more in the entire Bi phase in the Cu alloy layer, so that the particles of the Bi phase are uniformly dispersed in the Cu alloy layer. Therefore, the particles of the Bi phase in the Cu alloy layer are sequentially exposed to a sliding surface as wear of the sliding material progresses while excessive flow-out of molten Bi is prevented, so that improved seizure resistance is achieved.
    Type: Application
    Filed: August 13, 2012
    Publication date: February 28, 2013
    Applicant: Daido Metal Company Ltd.
    Inventors: Ryo SATO, Takuo Imai, Kentaro Tujimoto
  • Split-type sliding bearing for crankshaft in internal combustion engine
    Patent number: 8382376
    Abstract: A split-type sliding bearing for a crankshaft is formed of a pair of semi-cylindrical bearings halves which are fitted between a pair of housing halves having respectively high and low thermal expansion coefficients, one of the pair of bearing halves being supported on the housing half having a low thermal expansion coefficient, and the other of the pair of bearing halves being supported on the housing half having a high thermal expansion coefficient. The circumferential end zones of the bearing half supported on the housing half having a high thermal expansion coefficient have a thickness which is greater than that of the circumferential end zones of the bearing half supported on the housing half having a low thermal expansion coefficient.
    Type: Grant
    Filed: December 24, 2009
    Date of Patent: February 26, 2013
    Assignee: Daido Metal Company Ltd.
    Inventors: Aisuke Kuwabara, Osamu Ishigo, Yasushi Saito