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| Number | Title | Issue Date |
| 8082839 | One-piece steel piston A one-piece steel piston that is made from a piston blank that includes a portion that is configured and designed to be displaced to form a cooling gallery and ring belt. The piston blank can be formed by a casting or forging process. The portion that is designed an... | 12/27/2011 |
| 8047123 | Cooling gallery insert for a piston A piston assembly for an internal combustion engine is provided, including a piston and at least one insert. The piston includes an annular recess, a first surface, a ring belt and a skirt. The annular recess is located between the ring belt and the skirt. The inser... | 11/01/2011 |
| 7900551 | Piston for an internal combustion engine A piston for an internal combustion engine has an annular cooling channel provided with oil admission boreholes and oil discharge boreholes, the oil discharge boreholes being oriented in the direction of the bolt hubs for the cooling thereof. ... | 03/08/2011 |
| 7895936 | Piston with a lightweight construction that is subjected to high thermal stress The invention relates to a piston of an internal combustion engine comprising an upper part (1) and a lower part (3) that consist of a respective light metal alloy (15) and to an associated method for increasing the thermal load-bearing capacity... | 03/01/2011 |
| 7762178 | Two-part piston for an internal combustion engine A two-part piston for an internal combustion engine consists of an upper part, a lower part and a circumferential, closed cooling channel radially on the outside and close to the piston crown. The channel is closed off, on its underside, by a cooling channel cover w... | 07/27/2010 |
| 7730828 | Rotor recess with scupper slots and free casting A piston for an internal combustion engine includes a piston head provided with an annular field, and a piston shaft arranged beneath the annular field. The piston shaft has shaft surfaces and a recess surface which is arranged around a bolt borehole and set back in... | 06/08/2010 |
| 7600465 | Piston for an internal combustion engine Disclosed is a piston (1) for a combustion engine, comprising an annular grooved reinforcement (4) that is screwed onto an externally threaded (13) collar (12) located in the piston head area via an internal thread (19) which is mo... | 10/13/2009 |
| 7578229 | Piston produced from a single forged or cast piston blank A piston and method of making a piston which involves providing a single piece piston blank that, after casting or forging, is separated into separate upper and lower portions. The upper portion is machined to develop a piston head having that includes a cooling gal... | 08/25/2009 |
| 7549368 | Light-metal piston having heat pipes The invention relates to a lightweight piston comprising heat pipes. The aim of the invention is to simplify the structure of such a piston while at the same time allowing for an improved heat dissipation from the piston areas subject to heat load while avoiding the... | 06/23/2009 |
| 7533601 | Multi-part piston for a combustion engine A multi-part piston for a combustion engine having a piston upper part and a piston lower part, where the piston upper part has a piston crown and an attachment head on its side facing the piston lower part, and the piston lower part has an attachment element in whi... | 05/19/2009 |
| 7409903 | One-piece piston for an internal combustion engine The invention relates to a one-piece piston (1) for an internal combustion engine comprising an annular cooling channel (6) which is arranged in the edge area of the piston head (4) and closed by a substantially cylindrical embodied in one-piece... | 08/12/2008 |
| 7370627 | Optimized low emission two-stroke internal combustion diesel engine An optimized two-stroke internal combustion diesel engine, suitable for locomotive applications, has been developed to meet the EPA locomotive Tier 2 emission standards. To achieve a low emission target below the EPA Tier 2 standards for NOx (5.5 g/bhp-hr... | 05/13/2008 |
| 7341037 | Engine piston and manufacture An engine piston is manufactured by assembling an outer shell, comprising a crown and tubular side wall in which a ring groove region and skirt are defined, with a plate-like mounting member and bonding them together by brazing or welding. The mounting member is loc... | 03/11/2008 |
| 7325525 | Piston for internal combustion engine A piston includes: in a cross-section that is perpendicular to a piston pin and that includes a center axis of the piston, a great thickness-reduction portion provided to attain a thin thickness as stress applied to the piston on a side without a cavity is small, an... | 02/05/2008 |
| 7308850 | Piston for combustion engine The invention relates to an aluminum piston for a combustion engine having a ring element, which is made of NiResist, is placed in the radially outer edge area of the piston head, and which, together with the base body, forms an annular cooling channel. The ring ele... | 12/18/2007 |
| 7302927 | Two-part piston for an internal combustion engine Proposed is a two-part piston 1 for an internal combustion engine, having an upper part 2 that has a pin 31 having an outside thread 32 on the underside of its piston crown 4, and having a lower part 3, which is connected wi... | 12/04/2007 |
| 7299772 | Cooling gallery fan assembly for a piston A piston for an internal combustion engine defining an axis of motion and including an annular cooling gallery defined within the piston. The cooling gallery extends annularly about the axis of motion of the piston. A plurality of annularly spaced fan blades is posi... | 11/27/2007 |
| 7281466 | Piston coolant gallery A cast piston, for an internal combustion engine or pump has an integral coolant ring gallery, with localized extensions, to achieve a coolant interchange with the gallery upon piston reciprocation. At least a portion of an extension lies generally parallel to the l... | 10/16/2007 |
| 7162990 | Two-part piston for an internal combustion engine A two-part piston for an internal combustion engine, comprising a piston head and a piston skirt connected with the piston head in articulated manner, by way of a piston pin. The piston head has a piston crown that is followed by a cylindrical circumference surface ... | 01/16/2007 |
| 7140291 | Oil-free/oil-less air compressor with an improved seal An oil-free/oil-less air compressor with a piston positioned for reciprocating in a bore, the piston having a first piston ring assembly made from a rigid, high temperature polymer, and a second piston ring assembly comprising a first portion that engages the bore, ... | 11/28/2006 |
| 7134383 | Piston arrangement The invention concerns a piston arrangement having a piston with a piston head and a piston skirt with a circumferential surface, and a connecting rod, which is connected with the piston via a ball joint comprising a ball, and penetrated by an oil supply channel, wh... | 11/14/2006 |
| 7131418 | Cooled piston for an internal combustion engine The invention relates to a cooled piston (1) for an internal combustion engine comprising a cooling duct (2). This cooling duct encircles in an annular manner inside the piston head at the height of the ring part and is closed at its end, which is open... | 11/07/2006 |
| 7107893 | Piston-pin bearing for internal combustion engines A piston-pin bearing for an internal combustion engine wherein a cylindrical piston pin is mounted. The piston-pin bearing has a hub bore that significantly reduces mechanical stress in the piston, results in a longer service life for the piston, and avoids the form... | 09/19/2006 |
| 7104183 | One-piece steel piston A one-piece steel piston that is made from a piston blank that includes a portion that configured and designed to be displaced to form a cooling gallery and ring belt. The piston blank can be formed by a casting or forging process. The portion that is designed and c... | 09/12/2006 |
| 7100494 | Piston arrangement The invention concerns a piston arrangement having a piston with a piston head and a piston skirt and a connecting rod, which is connected with the piston via a ball joint arrangement comprising a ball, the ball being held in the piston by means of a safety element.... | 09/05/2006 |
| 7080610 | Cooled piston consisting of two parts Cooled two-part piston for internal combustion engines having an upper piston part containing the piston ring grooves and piston pin bosses, and a piston skirt connected with the former exclusively by way of a piston pin. The upper piston part has a cooling oil annu... | 07/25/2006 |
| 7005620 | Piston and method of manufacture A piston particularly adapted for heavy-duty diesel engine applications is fabricated from separate parts having circumferentially extending joining surfaces that are heated prior to bonding to an elevated temperature sufficient to enable bonding of the joining surf... | 02/28/2006 |
| 7003878 | Method for producing a ring support with a sheet metal cooling channel welded thereon The invention relates to a method for producing a ring support (1) with a sheet metal cooling channel welded thereon (5), which is transfused later with an aluminium melt for producing a piston. The aim of the invention is to improve the production of ... | 02/28/2006 |
| 6978712 | Variable displacement piston type pump A method of providing variable pumping rate from a piston type pump at a constant drive speed, comprising providing a connecting rod connected to the throw of a crankshaft on one end and to a connecting pin on the other end, constraining said connecting pin to move ... | 12/27/2005 |
| 6973723 | Piston formed by powder metallurgical methods A piston includes a piston structure being unitarily formed in a powder metallurgy process, the piston structure having a crown assembly and a skirt assembly, at least a partial combustion chamber being formed intersecting a piston crown surface during the powder me... | 12/13/2005 |
| 6938537 | Piston for an internal combustion engine A piston for an internal combustion engine which comprises a piston body, and a ring element, which together form a basic piston body. When the ring element is screwed onto the piston body, it forms a ring shaped cooling channel which is closed off in a direction of... | 09/06/2005 |
| 6938604 | Cooling channel cover for a one-piece piston of an internal combustion engine A cooling channel cover for a one-piece piston of an internal combustion engine, the piston having a closed cooling channel that runs around inside the piston crown, at the level of the piston ring band, and a ring-shaped recess provided between the piston ring band... | 09/06/2005 |
| 6920860 | Cooling channel cover for a one-piece piston of an internal combustion engine A cooling channel cover for a one-piece piston of an internal combustion engine, the piston having a closed cooling channel that runs around inside the piston crown, at the level of the piston ring band, and a ring-shaped recess provided between the piston ring band... | 07/26/2005 |
| 6862976 | Monobloc piston A monobloc piston has at least two steel parts welded together to define an inner cooling gallery. An outer ring belt is spaced from an inner annular support wall and is joined by a combustion bowl and a lower wall. A pair of pin bosses have axially aligned pin bore... | 03/08/2005 |
| 6840156 | Piston with cast-in undercrown pins for increased heat dissipation A cast engine piston has a crown with a combustion surface and an undercrown for exposure to crankcase fluids. A plurality of pins extend from the undercrown to increase the surface area of the undercrown. The pins draw heat from the crown and dissipate the heat to ... | 01/11/2005 |
| 6840155 | Multi-axially forged piston A multi-axially forged mono-bloc piston includes a lower crown part forged of steel and including a pair of pin bosses and an integral skirt formed as one piece with the pin bosses 20. The lower crown part is friction welded to an upper crown part to form at ... | 01/11/2005 |
| 6820582 | Cooling channel cover for a one-piece piston of an internal combustion engine A cooling channel cover for a one-piece piston of an internal combustion engine, the piston having a closed cooling channel that runs around inside the piston crown and a ring-shaped recess between the piston ring band and the piston shaft. There is an easy to assem... | 11/23/2004 |
| 6789460 | Multipart cooled piston for a combustion engine A multipart cooled piston for a combustion engine has a piston upper part of steel comprising a combustion bowl and a ring wall with ring belt, and a piston lower part comprising a piston skirt, pin bosses for receiving the piston pin connecting the piston to the co... | 09/14/2004 |
| 6772846 | Method for drilling shaker bores into the cooling channel of a single-part piston A method for drilling shaker bores into a cooling channel of a single-part piston, in which gudgeon-pin bosses each having a gudgeon-pin bore and piston shaft elements are molded onto the piston head via a tie-up substantially extending fully around in the form of a... | 08/10/2004 |
| 6763758 | Multi-part cooled piston for an internal combustion engine A multi-part cooled piston for an internal combustion engine comprises a one-piece piston upper part having a combustion bowl and an annular wall with a piston-ring part, and a one-piece piston lower part having a box-like piston skirt, and bosses to receive the pis... | 07/20/2004 |
