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    Antiblow-by piston and seal construction for high temperature applications
    1.
    发明授权
    Antiblow-by piston and seal construction for high temperature applications 失效
    抗冲击活塞和密封结构用于高温应用

    公开(公告)号：US5392692A

    公开(公告)日：1995-02-28

    申请号：US213336

    申请日：1994-03-14

    申请人： V. Durga N. Rao ,  Daniel M. Kabat

    发明人： V. Durga N. Rao ,  Daniel M. Kabat

    IPC分类号： F16J9/16 ,  F16J9/00

    CPC分类号： F16J9/16

    摘要： A piston and ring assembly operative within a cylindrical bore wall to retain fluid to one side of the assembly, comprising a piston having at least one annular stepped groove in the side wall of the piston, the groove being stepped into uppermost and lowermost spaces with the uppermost space having the greatest depth; at least two split compression rings in the groove, effective to each substantially annularly engage the bore wall, the rings having mating surfaces superimposed one upon another and having their split ends out of superimposed alignment, and a solid lubricant that coats essentially all of the groove and constitutes the non-mating surfaces of the superimposed rings. Pressure of the retained fluid forces the rings together to act in unison and seal jointly against both the step and a side of the groove opposite the retained fluid. The solid film lubricant assists in eliminating freezing of the rings against the groove sides, increasing ring fatigue life, enhancing ring tension and reducing engine emissions.

    摘要翻译： 活塞和环组件，其操作在圆柱形孔壁内，以将流体保持在组件的一侧，包括活塞，该活塞在活塞的侧壁中具有至少一个环形阶梯槽，所述凹槽被逐步进入最上部和最下部的空间， 深度最大的最高空间; 凹槽中至少有两个分开的压缩环，其有效地基本上环形地接合孔壁，所述环具有彼此重叠的配合表面，并且其分支端部不叠加对准，并且固体润滑剂基本上涂覆所有凹槽 并且构成叠加环的非配合表面。 保持的流体的压力迫使环在一起以一致地作用并且与保持的流体相对的槽与槽的一侧共同地密封。 固体膜润滑剂有助于消除环相对于槽侧的冻结，增加环疲劳寿命，增强环张力并减少发动机排放。

    Metal encapsulated solid lubricant coating system
    2.
    发明授权
    Metal encapsulated solid lubricant coating system 失效
    金属包封固体润滑剂涂层系统

    公开(公告)号：US5315970A

    公开(公告)日：1994-05-31

    申请号：US125719

    申请日：1993-09-24

    申请人： V. Durga N. Rao ,  Daniel M. Kabat ,  Robert A. Rose

    发明人： V. Durga N. Rao ,  Daniel M. Kabat ,  Robert A. Rose

    IPC分类号： C10M169/04 ,  C23C4/04 ,  F02B75/08 ,  F02F1/10

    CPC分类号： C23C4/04 ,  Y10T29/49272 ,  Y10T428/29 ,  Y10T428/2991

    摘要： An engine block having one or more anti-friction coated cylinder bore walls, comprising: a coating of grains fused to the cylinder bore wall, the grains being comprised of solid lubricant particles encapsulated within a soft metal shell, the shells being fused together to form a network with limited porosity, the solid lubricant comprising at least graphite and MoS.sub.2 ; and wet oil lubrication retained within the porosity of the coating.

    摘要翻译： 一种具有一个或多个抗摩擦涂覆的气缸孔壁的发动机缸体，包括：与气缸孔壁熔合的晶粒涂层，所述颗粒由包封在软金属壳内的固体润滑剂颗粒组成，所述壳体熔合在一起以形成 具有孔隙率有限的网络，所述固体润滑剂至少包含石墨和MoS 2; 并且润滑油润滑保留在涂层的孔隙度内。

    Method of making and using a piston ring assembly
    4.
    发明授权
    Method of making and using a piston ring assembly 失效
    制造和使用活塞环组件的方法

    公开(公告)号：US5430938A

    公开(公告)日：1995-07-11

    申请号：US213399

    申请日：1994-03-14

    申请人： V. Durga N. Rao ,  Daniel M. Kabat

    发明人： V. Durga N. Rao ,  Daniel M. Kabat

    IPC分类号： F16J9/16 ,  F16J9/22 ,  B23P15/00

    CPC分类号： F16J9/16 ,  F16J9/22 ,  Y10T29/49256 ,  Y10T29/49263 ,  Y10T29/49281 ,  Y10T29/49284

    摘要： Method of making a piston ring assembly by providing a metallic (i.e. cast aluminum) piston with a crown and an annular depending side wall; machining a stepped annular groove in the side wall having a total height of at least 4 mm (preferably having a combined total height equal to the groove height less 60 microns or less); fabricating a pair of metallic (i.e. aluminum based) split annular compression rings nestable within said groove and effective to operate together as a superimposed unit to seal against both said step and groove; coating said groove and the non-mating surfaces of said rings with solid film lubricants (i.e. graphite, BN and MoS.sub.2); and inserting said pair of coated rings into said coated groove with their split ends out of superimposed alignment. Also a method of reducing piston ring blow-by for a piston ring assembly in a cylinder bore wall of an internal combustion engine, the wall being bathed with oil drawn from a reservoir comprising providing a machined piston and split compression rings as above and reciprocatingly operating the assembly in the bore wall for carrying out engine operation whereby the rings act in unison due to friction at their mating surfaces and are free to radially adjust as a unit with little or no inhibiting friction while maintaining sealing engagement with the step of the groove, a side of the groove, and the oil film on the bore wall.

    摘要翻译： 通过提供具有冠部和环形悬挂侧壁的金属（即铸铝）活塞来制造活塞环组件的方法; 在侧壁中加工具有至少4mm的总高度（优选地具有等于凹槽高度小于60微米或更小的组合总高度）的阶梯状环形凹槽; 制造可嵌套在所述槽内的一对金属（即铝基）分裂环形压缩环，并有效地作为叠加单元一起操作以密封所述台阶和凹槽; 用固体膜润滑剂（即石墨，BN和MoS2）涂覆所述环的所述槽和非配合表面; 并且将所述一对涂覆的环插入所述涂覆的凹槽中，其分离端部不重叠对准。 还有一种减少内燃机气缸孔壁中的活塞环组件的活塞环窜气的方法，该壁被从油箱中抽出的油沐浴，包括提供如上所述的加工活塞和分离的压缩环，并且往复操作 所述组件在所述孔壁中用于进行发动机操作，由此由于其配合表面处的摩擦而使所述环一起作用，并且在保持与所述凹槽的所述台阶的密封接合的同时，能够以很少的或没有抑制摩擦力的方式自由地进行径向调节， 凹槽的一侧和孔壁上的油膜。

    Method of making an anti-friction coating on metal by plasma spraying powder having a solid lubricant core and fusable metal shell
    5.
    发明授权
    Method of making an anti-friction coating on metal by plasma spraying powder having a solid lubricant core and fusable metal shell 失效
    通过等离子喷涂具有固体润滑剂芯和易熔金属壳的粉末在金属上制备抗摩擦涂层的方法

    公开(公告)号：US5358753A

    公开(公告)日：1994-10-25

    申请号：US133412

    申请日：1993-09-24

    申请人： V. Durga N. Rao ,  Daniel M. Kabat ,  Robert A. Rose

    发明人： V. Durga N. Rao ,  Daniel M. Kabat ,  Robert A. Rose

    IPC分类号： C10M169/04 ,  C23C4/04 ,  B05D1/12

    CPC分类号： C23C4/04 ,  Y10T29/49272 ,  Y10T428/29 ,  Y10T428/2991

    摘要： A method of making an anti-friction coating on a metal surface subject to sliding wear, including the steps of: forming an encapsulated powder having grains made of a core of solid lubricants including at least graphite and MoS.sub.2 (others may include BN, NaF, LiF, CaF.sub.2, and WS.sub.2), and a thin shell of fusable soft metal such as Ni, Co, Fe, Zn, Sn, Mg, or Cu; plasma spraying the powder onto a light metal surface, such as a cylinder bore wall of an internal combustion engine, to form a coating; and finish-smoothing the coating to a uniform thickness of about 25-175 microns. Some core particles may be hard, wear-resistant particles such as SiC, NiCrAl, FeMn, FeCrAl, FeWNiVCr, NiCrMoVW, FeCrMoWV, CoFeNiCrMoWV, NiCrMoV, and CoMoCrVW.

    摘要翻译： 一种在具有滑动磨损的金属表面上制造抗摩擦涂层的方法，包括以下步骤：形成具有由至少包括石墨和MoS 2的固体润滑剂芯制成的颗粒的包封粉末（其它可以包括BN，NaF， LiF，CaF 2和WS 2），以及诸如Ni，Co，Fe，Zn，Sn，Mg或Cu之类的易熔软金属薄壳; 将粉末等离子体喷涂到诸如内燃机的汽缸孔壁的轻金属表面上以形成涂层; 并将涂层整理平整至约25-175微米的均匀厚度。 一些核心颗粒可以是硬的耐磨颗粒，例如SiC，NiCrAl，FeMn，FeCrAl，FeWNiVCr，NiCrMoVW，FeCrMoWV，CoFeNiCrMoWV，NiCrMoV和CoMoCrVW。

    Thermoset polymer/solid lubricant coating system
    6.
    发明授权
    Thermoset polymer/solid lubricant coating system 失效
    热固性聚合物/固体润滑剂涂料体系

    公开(公告)号：US5363821A

    公开(公告)日：1994-11-15

    申请号：US88686

    申请日：1993-07-06

    申请人： V. Durga N. Rao ,  Daniel M. Kabat ,  Brian M. Lizotte

    发明人： V. Durga N. Rao ,  Daniel M. Kabat ,  Brian M. Lizotte

    IPC分类号： F02F1/00 ,  C10M111/04 ,  C10M169/04 ,  C23C4/04 ,  F02B1/04 ,  F02B51/02 ,  F02B77/02 ,  F16J10/00 ,  F16N15/00 ,  F22B5/00

    CPC分类号： F16N15/00 ,  C10M111/04 ,  C23C4/04 ,  F02B77/02 ,  C10M2201/00 ,  C10M2201/003 ,  C10M2201/0403 ,  C10M2201/041 ,  C10M2201/042 ,  C10M2201/0433 ,  C10M2201/053 ,  C10M2201/0603 ,  C10M2201/061 ,  C10M2201/0613 ,  C10M2201/0623 ,  C10M2201/0653 ,  C10M2201/066 ,  C10M2201/0663 ,  C10M2201/0803 ,  C10M2201/0853 ,  C10M2201/0863 ,  C10M2201/0873 ,  C10M2201/1006 ,  C10M2201/1023 ,  C10M2201/1033 ,  C10M2201/1053 ,  C10M2201/123 ,  C10M2201/16 ,  C10M2201/18 ,  C10M2209/00 ,  C10M2209/02 ,  C10M2209/10 ,  C10M2209/1003 ,  C10M2209/101 ,  C10N2240/02 ,  F02B1/04 ,  F02B51/02 ,  Y02T10/126 ,  Y10T29/49272

    摘要： A solid film lubricant system for protecting metal wear interfaces subject to high temperatures and wet lubrications, comprising an oil-attracting solid lubricant mixture with at least two elements selected from the group of graphite, MoS.sub.2 and BN; a support (i.e., hard lands or hard sublayer) for the mixture to loads of at least 10 psi at temperatures of 600.degree.-800.degree. F. while being thermally stable; a thermally stable thermoset polymer matrix adhering the mixture to the support or the wear surface, the polymer having inherent hydrocarbon chemical attraction to form a tenacious oil film of the lubricating oil on the wearing surface. A method of making anti-friction coated surfaces comprising providing a light metal based cylinder surface (i.e., metal base or alloys of aluminum, titanium, or magnesium); exposing nonoxidized metal of the surface; applying a high elastic modulus load-supporting metal layer onto at least portions of the light metal cylinder surface; and simultaneously distributing a solvent-based solid film lubricant mixture and thermoset polymer onto at least portions of the layer at about room temperature to form a coating of desired thickness. An engine block with one or more anti-friction coated cylinder bore surfaces, comprising a hard, load-supporting face on the bore surface; and a coating on the face comprised of an oil-attracting solid lubricant mixture and a thermoset polymer that supports loads of at least 10 psi at temperatures of 600.degree.-800.degree. F. and is stable at such temperatures.

    摘要翻译： 一种用于保护经受高温和湿润润滑的金属磨损界面的固体膜润滑剂系统，包括具有选自石墨MoS 2和BN中的至少两种元素的吸油固体润滑剂混合物; 用于混合物的载体（即硬土或硬亚层）在600-800°F的温度下的载荷至少为10psi，同时热稳定; 将该混合物粘附到载体或耐磨表面上的热稳定的热固性聚合物基体，该聚合物具有固有的碳氢化合物化学吸引力，以在磨损表面上形成润滑油的坚固的油膜。 一种制造抗摩擦涂层表面的方法，包括提供基于轻金属的圆柱体表面（即，金属基体或铝，钛或镁的合金）; 暴露表面的非氧化金属; 在轻金属圆筒表面的至少一部分上施加高弹性模量负载金属层; 并且在大约室温下同时将溶剂基固体膜润滑剂混合物和热固性聚合物分布到该层的至少部分上以形成所需厚度的涂层。 具有一个或多个抗摩擦涂覆的气缸孔表面的发动机缸体，包括孔表面上的硬的负载支撑面; 以及由吸油固体润滑剂混合物和热固性聚合物组成的涂层，其在600-800°F的温度下支持至少10psi的载荷，并且在这样的温度下是稳定的。

    Metal encapsulated solid lubricant coating system
    7.
    发明授权
    Metal encapsulated solid lubricant coating system 失效
    金属包封固体润滑剂涂层系统

    公开(公告)号：US5302450A

    公开(公告)日：1994-04-12

    申请号：US88486

    申请日：1993-07-06

    申请人： V. Durga N. Rao ,  Daniel M. Kabat ,  Robert A. Rose

    发明人： V. Durga N. Rao ,  Daniel M. Kabat ,  Robert A. Rose

    IPC分类号： C10M169/04 ,  C23C4/04 ,  B32B19/00

    CPC分类号： C23C4/04 ,  Y10T29/49272 ,  Y10T428/29 ,  Y10T428/2991

    摘要： A thermally sprayable powder having grains comprising: a core of solid lubricant particles comprised of at least graphite and MoS.sub.2 (others may include Bn, NaF, LiF, CaF.sub.2, and WS.sub.2); and a thin, soft metal shell (Ni, Co, Fe, Zn, Sn, Mg, or Cu) encapsulating such core. Some core particles may also be hard, wear-resistant particles from the group consisting of SiC, NiCrAl, FeMn, FeCrAl, FeWNiVCr, NiCrMoVW, FeCrMoWV, CoFeNiCrMoWV, NiCrMoV, and CoMoCrVW.

    摘要翻译： 一种具有颗粒的可热喷涂粉末，包括：由至少石墨和MoS2组成的固体润滑剂颗粒芯（其它可包括Bn，NaF，LiF，CaF 2和WS 2）; 以及封装这种芯的薄的软金属壳（Ni，Co，Fe，Zn，Sn，Mg或Cu）。 一些核心颗粒也可以是由SiC，NiCrAl，FeMn，FeCrAl，FeWNiVCr，NiCrMoVW，FeCrMoWV，CoFeNiCrMoWV，NiCrMoV和CoMoCrVW组成的组中的硬的耐磨颗粒。

    Ultra low device volume piston system
    8.
    发明授权
    Ultra low device volume piston system 失效
    超低装置体积活塞系统

    公开(公告)号：US5490445A

    公开(公告)日：1996-02-13

    申请号：US213400

    申请日：1994-03-14

    申请人： V. Durga N. Rao ,  David A. Yeager

    发明人： V. Durga N. Rao ,  David A. Yeager

    IPC分类号： F02F3/00 ,  F16J1/08 ,  F16J9/06 ,  F16J9/12 ,  F16J9/20 ,  F16J9/28 ,  F01B31/10 ,  B32B15/18

    CPC分类号： F16J9/206 ,  F16J1/08 ,  F16J9/06 ,  F16J9/12 ,  F16J9/28 ,  F02F3/00 ,  F05C2203/0882

    摘要： A piston and ring assembly operative within a cylindrical bore wall to retain pressurized fluid to one side of the assembly, the piston having a crown and an annular side wall for movement along the bore wall. The assembly comprises a piston having at least on annular groove (the groove having an enlarged height of at least 4 mm) in the side wall of the piston; at least two split compression rings in each such groove effective to each substantially annularly engage the bore wall, the rings having mating superimposed surfaces to facilitate movement of the rings in unison as a result of friction therebetween; a compressed elastomeric ring (constituted of polysilanes, such as silastic with strengtheners) disposed in said groove (having a compression of 10-20% at room temperature), acting between the piston and ring most-remote from said piston crown, to resiliently bias at least the most-remote-ring against the bore wall; a solid film lubricant coating essentially all the sides of said groove; and non-mating surfaces of solid lubricant carried by the rings to effect reduced friction between said rings and groove when being biased by the elastomeric ring.

    摘要翻译： 活塞和环组件在圆柱形孔壁内操作以将加压流体保持在组件的一侧，活塞具有冠部和用于沿着孔壁运动的环形侧壁。 该组件包括活塞，该活塞至少在活塞的侧壁中具有环形槽（该凹槽具有至少4mm的增大高度）; 每个这样的槽中的至少两个分开的压缩环有效地每个至少两个分开的压缩环基本上环形地接合孔壁，所述环具有配合的重叠表面，以便于由于它们之间的摩擦而一致地移动环; 设置在所述凹槽（在室温下具有10-20％的压缩压力）的压缩弹性体环（例如具有强化剂的硅橡胶，例如具有强化剂的硅橡胶），作用在活塞和活塞顶部最远的环之间，以弹性偏压 至少最靠近孔壁的最远的环; 固体膜润滑剂基本上覆盖所述槽的所有侧面; 以及由环承载的固体润滑剂的非配合表面，以在被弹性体环偏压时实现所述环和凹槽之间的摩擦减小。

    Moldable mixture of sacrificial binder and sinterable particulate solids
    9.
    发明授权
    Moldable mixture of sacrificial binder and sinterable particulate solids 失效
    牺牲粘合剂和可烧结颗粒固体的可模制混合物

    公开(公告)号：US4265794A

    公开(公告)日：1981-05-05

    申请号：US65702

    申请日：1979-08-10

    申请人： Robert A. Pett ,  V. Durga N. Rao ,  S. Burhan A. Qaderi

    发明人： Robert A. Pett ,  V. Durga N. Rao ,  S. Burhan A. Qaderi

    IPC分类号： B22F1/00 ,  B22F3/22 ,  C04B35/634 ,  C08L53/02 ,  C08L91/00

    CPC分类号： B22F3/225 ,  B22F1/0059 ,  C04B35/634 ,  C08L53/02 ,  B22F2001/0066 ,  B22F2998/00

    摘要： Improvements in molded articles from sinterable particulate solids, improvements in method for making such articles, and novel sacrificial binders for use in making such articles are disclosed. The sacrificial binders used in this invention comprise block polymers having the structural formulaAB--AB--.eta. Awherein ".eta." is 0 or a positive integer, "A" is a linear or branched polymer that is glassy or crystalline at room temperature and has its softening point in the range of about 80.degree. C. to about 250.degree. C. and "B" is a polymer different from A that behaves as an elastomer at processing temperatures, a plasticizer which may be oil, wax, or oil and wax, and optionally other components.

    摘要翻译： 公开了可烧结颗粒固体的成型制品的改进，制造这种制品的方法的改进，以及用于制造这种制品的新型牺牲粘合剂。 本发明中使用的牺牲性粘合剂包括具有结构式AB-AB-A A的嵌段聚合物，其中“η”为0或正整数，“A”是在室温下为玻璃状或结晶的直链或支链聚合物， 其软化点在约80℃至约250℃的范围内，“B”是不同于在加工温度下作为弹性体的A的聚合物，可以是油，蜡或油和蜡的增塑剂 ，和任选的其它组分。