| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 141 | Reciprocating piston | US039808 | 1979-05-17 | US4313368A | 1982-02-02 | Maurice Promeyrat |
| A reciprocating piston used in particular in heat engines and other industrial machines comprises at least one decompression chamber delimited between the bottom of an annular groove and the inner face of the first ring housed in this groove. A split ring of small cross section is movable in this decompression chamber. Additionally the upper bead of the piston presents on its periphery projecting parts and recessed parts, the projecting parts having an initial deameter, before running-in, such that the diametrical clearance when cold, between the periphery of the bead and the bore of the cylinder in which the piston is housed, is substantially equal to half the corresponding usual clearance between conventional upper bead and cylinder. | ||||||
| 142 | Ring manufacture, productive of line contact seal | US47555874 | 1974-06-03 | US3926166A | 1975-12-16 | PACKARD NORMAN M |
| Methods, apparatus, and improved structure having as their common basis the sequence of collapsing a piston ring in a fixture approximating engine bore diameter, and lapping a locality at the side of the ring while so collapsed, until a circumferentially continuous portion--narrow in width and preferably line size--of the side is flat in the range of at least about 10 to 5 light bands. That is, the out-of-flatness of the circumferentially continuous portion, stated another way, is limited to a maximum range equivalent to about 5 to 10 light bands at standard inspection wavelength. One of the broadest methods here disclosed is the use exclusively of rings so carefully made and so lap inspected as above on a percentage basis that the inner peripheral edge at the side has all points thereon in coplanarity to a degree equivalent to the stated range to seal in absolute contact in a substantially continuous sealing ring.
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| 143 | Method of piston ring manufacture | US58809732 | 1932-01-22 | US1977910A | 1934-10-23 | RAY GROVER |
| 144 | Piston and piston ring and process of making the same | US45369221 | 1921-03-19 | US1474024A | 1923-11-13 | COWLES BURTON S |
| 145 | COATED STEEL PISTON RING | US15606093 | 2017-05-26 | US20180340612A1 | 2018-11-29 | Alexander COOPER; Robert PICCARD; Thomas SMITH; Thomas STONG |
| A piston ring is formed from a steel substrate consisting of the carbon in a range of 0.80-0.95 wt. %, silicon in a range of 0.30-0.55 wt. %, manganese in a range of 0.25-0.5 wt. %, phosphorus in a range of up to 0.04 wt. %, sulfur in a range of up to 0.04 wt. %, chromium in a range of 17-18 wt. %, molybdenum in a range of 0.70-1.25 wt. %, vanadium in a range of 0.05-0.15%, the remainder iron. The ring has been through hardened and tempered so that it has a hardness of 46-54 HRC. A coating is then applied via PVD or other suitable methods onto the ring surface to create the finished piston ring. | ||||||
| 146 | PRESSURE RING | US15950744 | 2018-04-11 | US20180299011A1 | 2018-10-18 | Hisashi Ohki; Takashi Koyama; Hiroshi Yaguchi; Yusuke Morita; Takashi Suzuki |
| A pressure ring includes a first pressure ring fitted in a first ring groove of a piston; and a second pressure ring fitted in a second ring groove of the piston, and positioned between the first pressure ring and an oil ring. The second pressure ring is provided with a groove that extends across a surface of the second pressure ring from an inner peripheral side to an outer peripheral side. The groove is configured such that at least one of a width and a depth of the groove becomes larger toward the outer peripheral side from the inner peripheral side. | ||||||
| 147 | Unburned fuel venting in internal combustion engines | US14652761 | 2013-12-20 | US10041438B2 | 2018-08-07 | Karl Stellwagen |
| An internal combustion engine is disclosed. The engine may have a cylinder that defines a combustion chamber for combusting an air/fuel mixture. The engine may also have a piston reciprocally movable within the cylinder between a top dead center (TDC) and a bottom dead center (BDC). The piston may have an uppermost piston ring configured to sealingly contact the cylinder. The engine may have an annular crevice facing the combustion chamber. The crevice may be defined by the cylinder, the piston, and the uppermost piston ring. The engine may also have a flow channel fluidly connected to the combustion chamber. The flow channel may direct unburned air/fuel-mixture out of the combustion chamber. The at least one flow channel may be fluidly connected to the annular crevice for a crank angle range of about 85° to 95° and about 265° to 275° after the top dead center (TDC). | ||||||
| 148 | PISTON RING AND ITS PRODUCTION METHOD | US15744609 | 2016-07-14 | US20180209541A1 | 2018-07-26 | Yuji SHIMA |
| To provide a piston ring free from microwelding to a piston while exhibiting excellent wear resistance in side surfaces, for a long period of use in a high-temperature, high-pressure environment, and its production method, a nitride layer is formed on at least one of upper and lower side surfaces of the piston ring, and then subjected to a phosphate chemical conversion treatment, such that the nitride layer has at least one of granular and vermicular surface forms. | ||||||
| 149 | PISTON RING FOR COMBUSTION ENGINE | US15740064 | 2016-06-29 | US20180187780A1 | 2018-07-05 | Kazunori NATABE; Naoya HONJOU |
| Provided is a piston ring for an internal combustion engine that enables size reduction of a chamfered edge without leading to the chipping, and sufficient size reduction of a flow passage of a blow-by gas in a piston ring gap, thus effectively restraining the blow-by gas from passing through the piston ring gap. A piston ring 1 with a piston ring gap 2 used for an internal combustion engine includes a chamfered edge 3 continuous to at least one of piston ring end faces at the piston ring gap 2 and an outer peripheral surface 1a of the piston ring 1. The chamfered edge 3 has a curved shape. | ||||||
| 150 | COMBINED OIL CONTROL RING | US15564844 | 2016-04-08 | US20180112775A1 | 2018-04-26 | Hiroshi SHIMIZU; Takayuki ICHIKAWA; Kazuya MOCHIDUKI |
| To provide a combined oil control ring comprising a pair of upper and lower side rails and an axially corrugated spacer expander having upper and lower portions for automobile engines, which is capable of keeping an excellent oil-controlling function without sticking between a spacer expander and side rails even in a long period of engine operation, the upper and lower portions of the spacer expander have tabs pushing inner peripheral surfaces of the side rails, projections supporting the side rails, and intermediate portions between the tabs and the projections; and each intermediate portion opposing the side rail has a center-raised bottom having a center-raised shape when viewed along a substantially circumferential direction center-raised shape and a radial direction. | ||||||
| 151 | OIL RING | US15534119 | 2015-12-01 | US20180023702A1 | 2018-01-25 | Daisuke NAKAMURA; Kazuyuki YAMAHATA; Mitsuhiro ADACHI |
| An oil ring (1) includes an oil ring body (10) and a coil expander (20). The oil ring body (10) includes a pair of rail portions (12) each including an end portion of an outer periphery having a land (30) formed protruding radially outward from each rail portion (12). The land (30) includes an upper axial portion (31) and a lower axial portion (32) facing opposite to each other in an axial direction, a tapered portion (33) having one axial end contiguous to the upper axial portion (31) via a first curved portion (35), and a protruding portion (34) having one of axial ends contiguous to the tapered portion (33) and the other axial end contiguous to the lower axial portion (32) via a second curved portion (36). The protruding portion (34) is protruding in a direction perpendicular to the tapered portion (33). | ||||||
| 152 | PISTON RING | US15546648 | 2016-01-12 | US20180017159A1 | 2018-01-18 | Masaaki FUJITA |
| A piston ring includes an annular main body 2 having a side surface 2a and a side surface 2b, and an inner peripheral surface 2c and an outer peripheral surface 2d, wherein in the main body 2, a cutout section 21 is provided in a corner section 31 formed by the side surface 2b and the outer peripheral surface 2d. The cutout section 21 has a first surface 21a and a second surface 21b. An angle θ1 formed by the first surface 21a and the side surface 2b is an obtuse angle, and a corner section 32 formed by the second surface 21b and the outer peripheral surface 2d is located between the side surface 2b and the side surface 2a in a width direction of the main body 2. | ||||||
| 153 | COMBINED OIL CONTROL RING | US15536799 | 2015-12-22 | US20170350508A1 | 2017-12-07 | Takayuki ICHIKAWA; Takuma SEKIYA |
| A combined oil control ring comprising a pair of annular side rails each having a gap, and an axially corrugated spacer expander arranged between the side rails; the corrugated spacer expander having on the inside seating tabs for pushing inner peripheral surfaces of the side rails; the side-rail-pushing surface of each seating tab being provided with a nitrided layer; an entire surface of each spacer expander except for those provided with the nitrided layer being coated with a plating film; and the plating film having Vickers hardness HV0.01 of 300 or less. | ||||||
| 154 | COMBINED OIL RING | US15329282 | 2015-07-22 | US20170227126A1 | 2017-08-10 | Masataka KAWASAKI; Mamoru MIYAMOTO; Hideshi HITOSUGI; Kenji ARAI |
| Provided is a combined oil ring that further reduces engine oil consumption.A combined oil ring attached to an oil ring groove of a piston includes: a pair of upper and lower side rails each formed into a flat annular shape, and having a slide contact part that comes into sliding contact with a cylinder; and a spacer expander arranged between the pair of upper and lower side rails. In at least the upper side rail of the pair of upper and lower side rails, a cross-sectional shape of the slide contact part along an axial direction of the piston is a tapered shape linearly spreading from upper to lower parts of the piston; the tapered shape is at an angle of 5 to 30 degrees with respect to a central axis of the spacer expander, and has a vertex of the tapered shape within 0.15 mm from a lower end of the side rail; and a part closer to the lower end than the vertex is formed into a curved shape having a curvature of R0.01 to 0.5. | ||||||
| 155 | SLIDING ELEMENT | US15385296 | 2016-12-20 | US20170175622A1 | 2017-06-22 | Juliano Avelar Araujo; Eliel Dos Santos Paes |
| A sliding element, for example a piston ring for an internal combustion engine, may include a sliding face, an adhesive layer disposed on the sliding face, and a coating disposed over the adhesive layer. The coating may be composed of an amorphous carbon material. The coating may have a ratio between sp3 bonds and sp2 bonds that indicates a predominance of sp2 bonds. The coating may have a roughness profile including a value of Rpk of ≦0.15 μm and a value of Rz of 0.7≦Rz≦1.5 μm. | ||||||
| 156 | PISTON RING | US15320818 | 2015-06-30 | US20170167609A1 | 2017-06-15 | Noriaki CHIDA; Masataka OKANO |
| Provided is a piston ring (10) comprising a sliding surface (11) covered with a Cr—B—V—N alloy film (3), wherein a B content is within a range of 0.1-1.5 mass % inclusive, a V content is within a range of 0.05-1 mass % inclusive, and a ratio [B content/V content] is within a range greater than 1 and 30 or less, thereby achieving a piston ring (10) having higher wear resistance, cracking resistance, and peeling resistance. This alloy film (3) preferably further includes Ti, the Ti content being within a range greater than 0 mass % and 8 mass % or less. Such a piston ring (10) is preferably mounted on an engine that uses an alcohol fuel or an alcohol-containing fuel. | ||||||
| 157 | Combination of cylinder and piston ring | US14650154 | 2013-12-20 | US09644738B2 | 2017-05-09 | Akira Kunimoto; Masaki Moronuki |
| To provide a combination of a cylinder made of a hypereutectic Al—Si alloy and a hard-carbon-coated piston ring both exhibiting excellent wear resistance, the piston ring is provided with a laminate coating at least on an outer peripheral sliding surface thereof; the laminate coating comprising a metal layer, a metal-containing, hard carbon layer, and a metal-free, hard carbon layer in this order from the substrate side; the laminate coating having Martens' hardness (indentation hardness) HMs of 5-13 GPa, indentation modulus E of 70-200 GPa, and a deformation ratio Rpe of 0.45 or less, which is expressed by a ratio (Wp/We) of plastic deformation energy Wp to elastic deformation energy We; and a ratio (Tmf/Tm) of the thickness Tmf of the metal-free, hard carbon layer to the thickness Tm of the metal-containing, hard carbon layer being 2-8. | ||||||
| 158 | Piston ring for an internal combustion engine | US13768535 | 2013-02-15 | US09500280B2 | 2016-11-22 | Blair Matthew Jenness; Matthew Ryan Pedigo; Troy Kantola |
| A piston ring for sealing a cylinder wall to a piston body is provided. The piston ring includes a ring body of an elastically deformable material which extends substantially circumferentially around an axis and has an inner face that faces the axis. The inner face includes a plurality of axially spaced and radially inwardly extending contact features. The ring body configured to bias the contact features into engagement with the piston body to establish a seal therebetween. At least one of the contact features extends substantially continuously around a circumference for establishing a substantially continuous seal around the piston body, and at least one of the contact features is non-continuous and has at least one recessed area for allowing the passage of oil and gas therethrough. | ||||||
| 159 | PISTON RING | US15025756 | 2014-09-01 | US20160245407A1 | 2016-08-25 | Keiji HONDA; Katsuhiro TSUJI; Masaki MORONUKI; Takuma SEKIYA |
| The present invention provides a piston ring having excellent abrasion resistance to an aluminum alloy cylinder or cylinder liner formed of a mating material and is therefore capable of decreasing abrasion of the mating material. An exemplary piston ring has a hard carbon coating formed on an outer peripheral surface, and the hard carbon coating contains 0.5 atom % or more to less than 5 atom % of tungsten (W). | ||||||
| 160 | Piston ring | US14432238 | 2013-10-02 | US09285032B2 | 2016-03-15 | Hayato Sasaki; Takashi Ono; Toshikatsu Hayashi; Kouhei Sugimoto |
| Disclosed is a piston ring that, in an engine where high temperature is reached in the vicinity of the piston ring, is capable of sustaining an excellent effect of preventing aluminum cohesion over a prolonged period of time. The piston ring having a resin-based coating formed on at least one of an upper surface and a lower surface of a piston ring body, the resin-based coating including a first resin-based coating containing plate-like filler having a mean particle diameter of 2 μm to 20 μm and an aspect ratio of 20 to 200 and a second resin-based coating located under the first resin-based coating and containing hard particles having a mean particle diameter of 0.01 μm to 1 μm. | ||||||
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