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31. 发明专利

GB0329264D0 Iron based sintered body and method for producing the same 未知
公开(公告)号：GB0329264D0
公开(公告)日：2004-01-21
申请号：GB0329264
申请日：2003-12-18
申请人： NIPPON PISTON RING CO LTD , FUJI HEAVY IND LTD
IPC分类号： F02F1/00 , B22D19/00 , B22F3/11 , B22F3/24 , B22F7/08 , B32B15/01 , C22C33/02 , C22C38/00 , C22C38/10 , C22C38/12 , C22C38/16 , C22C38/58 , C23C8/18
摘要： An iron based sintered body suitable for being enveloped in a light metal alloy such as an aluminum alloy by casting, and a method for producing the same. A mixed powder is prepared by mixing an iron based powder, a copper powder and a graphite powder blended so that the Cu content and the C content are 5 to 40% by mass and 0.5 to 2.5% by mass, respectively, in the mixed powder. A lubricant powder and a fine particle powder for improving machinability may be further added in the mixed powder. Then, the mixed powder is filled into a mold formed to a green compact, and is sintered into a sintered body so that the sintered body has a desired average thermal expansion coefficient. The surface of the sintered body may be adjusted to have a surface roughness Rz of 10 to 100 mum optionally by applying a shot blast treatment or by a shot blast treatment and an additional steam treatment. This process permits the sintered body to be enhanced in adhesive property and bonding strength while being improved in enveloping casting property when the sintered body is enveloped in the light metal alloy by casting. A martesitic stainless steel powder or ferritic stainless steel powder may be used instead of the pure iron powder, or Cr, Mo and W powders may be further blended.

32. 发明专利

SE0301634L 未知
公开(公告)号：SE0301634L
公开(公告)日：2003-12-13
申请号：SE0301634
申请日：2003-06-05
申请人： NIPPON PISTON RING CO LTD
发明人： AMANO HIDEKI , OMIYA TAKAO
IPC分类号： F02F5/00 , C23C4/04 , C23C4/08 , F16C20060101 , F16J9/26

33. 发明专利

DE10312627A1 未知
公开(公告)号：DE10312627A1
公开(公告)日：2003-10-23
申请号：DE10312627
申请日：2003-03-21
申请人： NIPPON PISTON RING CO LTD
发明人： MASUYAMA TETSUO , MATSUSHIMA NOBUYUKI
IPC分类号： F02F5/00 , F16J9/06 , F16J9/14
摘要： The present invention provides a piston ring comprising a piston ring main body and an expander ring arranged on an inner peripheral surface thereof, the expander ring comprising two oil expander rings, one of which is housed in a space in a spiral of the other. The expander ring is formed so that the pressing force in the diameter expanding direction is larger in a high temperature state than in a low temperature state. The expander comprises two different kinds of expander members. One of these expander members has the same functions as those of a conventional expander, and the other is a member in which there occurs a change in tension in the diametral direction with temperature. As a result, the pressing force of the master expander member having the same effects as those of the conventional expander is made variable.

34. 发明专利

FR2837895A1 未知
公开(公告)号：FR2837895A1
公开(公告)日：2003-10-03
申请号：FR0304103
申请日：2003-04-02
申请人： NIPPON PISTON RING CO LTD
发明人： MATSUYAMA TESTUO , MATSUSHIMA NOBUYUKI
IPC分类号： F02F5/00 , F16J9/06 , F16J9/14 , F16J9/08
摘要： The present invention provides a piston ring comprising a piston ring main body and an expander ring arranged on an inner peripheral surface thereof, the expander ring comprising two oil expander rings, one of which is housed in a space in a spiral of the other. The expander ring is formed so that the pressing force in the diameter expanding direction is larger in a high temperature state than in a low temperature state. The expander comprises two different kinds of expander members. One of these expander members has the same functions as those of a conventional expander, and the other is a member in which there occurs a change in tension in the diametral direction with temperature. As a result, the pressing force of the master expander member having the same effects as those of the conventional expander is made variable.

35. 发明专利

DE19548931C2 未知
公开(公告)号：DE19548931C2
公开(公告)日：2003-07-10
申请号：DE19548931
申请日：1995-12-27
申请人： NIPPON PISTON RING CO LTD
发明人： ONODA MOTONOBU , OGAWA KATSUAKI , SHIMIZU KAZUO
IPC分类号： F02F5/00 , C23C14/06 , C23C14/14 , F16J9/26
摘要： According to an embodiment of the present invention a piston ring for internal combustion engines for use with a piston and a cylinder, is provided that has an external circumferential sliding surface adapted to slid against the internal wall of the cylinder. The piston ring has an ion-plating deposition layer formed over the externtal circumferential sliding surface, the deposition layer having pores and being made of a mixture of a first chromium nitride of CrN type and a second chromium nitride of Cr 2 N type. The mixing ratios in the mixture are more than 45.5 and less than 98.0 weight percent for the first chromium nitride and the balance portion for the second chromium nitride. According to another embodiment of the present invention, a piston ring for internal combustion engines for use with a piston and a cylinder, is provided that has an external circumferential sliding surface adapted to slid against the internal wall of the cylinder. The piston ring having an ion-plating deposition layer formed over the external circumferential sliding surface thereof, the deposition layer having pores and being made of a mixture of a first chromium nitride of CrN type, a second chromium nitride of Cr 2 N type, and metallic chromium. The mixing ratios in the mixture are more than 45.0 and less than 98.0 weight percent for the first chromium nitride, more than 0.5 and not more than 15.0 weight percent for the metallic chromium, and the balance portion for the second chromium nitride. According to a further embodiment of the present invention, the ion-plating deposition layer formed over the external circumferential sliding surface of the piston ring, made of the mixture described in the above embodiments, is formed to have porosity of more than 0.5 and not more than 20.0 percent.

36. 发明专利

DE10026721C2 未知
公开(公告)号：DE10026721C2
公开(公告)日：2003-06-18
申请号：DE10026721
申请日：2000-05-30
申请人： NIPPON PISTON RING CO LTD
发明人： TAKAHASHI TERUO , OSHIGE HIROSHI
IPC分类号： C22C33/02 , C22C38/00 , C23C8/50 , F01L3/02 , F01L3/22 , B22F7/00
摘要： An internal combustion engine includes, in combination, an intake side valve system and an exhaust side valve system. Each of the valve systems comprises a valve seat and a valve member to be assembled with the valve seat, in which the valve seat has a base member including a matrix of iron-base sintered alloy and a dispersed Si-Cr-Mo-Co group intermetallic compound powder, the intermetailic compound powder having a hardness of Hv600 to Hv1000 and an average particle diameter of 20 to 70 mum, the matrix being contained at 10 to 50 mass % with reference to total mass of the base member, and the valve member has a base member including a matrix of martensitic steel and a nitriding diffusion layer formed to a valve face of the base member, the nitriding diffusion layer having a hardness of more than Hv500 and a thickness of more than 20 mum.

37. 发明专利

SE0301634D0 未知
公开(公告)号：SE0301634D0
公开(公告)日：2003-06-05
申请号：SE0301634
申请日：2003-06-05
申请人： NIPPON PISTON RING CO LTD
发明人： AMANO HIDEKI , OMIYA TAKAO
IPC分类号： F02F5/00 , C23C4/04 , C23C4/08 , F16C20060101 , F16J9/26 , F16C

38. 发明专利

DE10252795A1 未知
公开(公告)号：DE10252795A1
公开(公告)日：2003-06-05
申请号：DE10252795
申请日：2002-11-13
申请人： NIPPON PISTON RING CO LTD
发明人： TAKAHASHI AKIRA , TAKAHASHI KAZUTOMO
IPC分类号： F16J9/06 , F16J9/16 , F02F5/00
摘要： A combined steel oil control ring is provided which has steel side rails and a steel spacer expander. The spacer expander includes ear portions for contacting the side rails. The ear portions are substantially equally spaced with respect to each other along the internal circumferential portion of the spacer expander. The ear portions have radially external circumferential surfaces adapted to press the side rails radially outwardly by using the resilient force caused by the spacer expander. The spacer expander has up-and-down contours formed circumferentially along the radially external circumferential surface, for preventing the side rails from circumferentially rotating relatively to the spacer expander. The up-and-down contours each include at least two axially extending groove regions and at least three axially extending flat regions. The groove regions and flat regions are dimensioned to extend the life span of the contours and the dies.

39. 发明专利

SE0300825D0 未知
公开(公告)号：SE0300825D0
公开(公告)日：2003-03-25
申请号：SE0300825
申请日：2003-03-25
申请人： NIPPON PISTON RING CO LTD
发明人： ISHIKAWA YOSHIKI , ANZAI FUJIO
IPC分类号： B24B33/02 , C23C26/00 , F02F1/00 , F02F1/20 , F16J
摘要： A cylinder liner for use in an internal combustion engine has an inner peripheral surface at which a surface treatment layer is formed upon water vapor treatment. The surface treatment layer has a surface configuration capable of providing excellent lubrication oil retaining function and initial break-in property as well as capable of being machined easily. The treatment surface of the cylinder liner has a plateau configuration providing a surface roughness Rz of 0.8 to 5.9 mum, and the plateau configuration is defined under DIN4776 by a reduced peak height Rpk of not more than 0.64 mum, a core roughness depth Rk of 0.05 to 1.8 mum, and a reduced valley depth Rvk of 0.15 to 3.3 mum. For grinding to the surface, a honing machine employs a grindstone containing metal bonded diamond grains at high density. Diamond grain size is not less than 4000.

40. 发明专利

DE4227293C2 未知
公开(公告)号：DE4227293C2
公开(公告)日：2002-11-07
申请号：DE4227293
申请日：1992-08-18
申请人： NIPPON PISTON RING CO LTD
发明人： TOMII HIROYASU , KANEKO YUKIO
IPC分类号： F16D3/26 , F16D1/08 , F16D3/04 , F16D3/40 , F16D3/74 , F16D3/28
摘要： A Cardan-type universal joint has a pair of joint bodies (11) each having a cylindrical hub (12) for securing thereto a rotary shaft (10), and a cross-shaped member (15) for connecting the pair of joint bodies together. Each of the hubs has at least one first slit, or escape slit, (20) formed therein radially inwardly from the circumference thereof having a sector shape with a sectoral angle of not less than 180 degrees and being disposed on a plane intersecting the axis of the shaft at an angle, thereby enabling the joint body to elastically deform in a spring-like manner.

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