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| Number | Title | Issue Date |
| 7954421 | Lightweight piston A piston has a piston head that is provided with a field of rings and a piston shaft which is disposed thereupon. The piston shaft is equipped with supporting shaft wall sections and rear connecting walls which interconnect the shaft wall sections, have an arched sh... | 06/07/2011 |
| 7086368 | Piston for an internal combustion engine A piston for an internal combustion engine includes a crown, tubular walls extending from the edge of the crown, and a cup portion protruding from the rear surface of the crown and having a concave spherical surface for forming a spherical joint with a spherical sma... | 08/08/2006 |
| 6860190 | Piston for internal combustion engine An engine piston has a crown portion generated about a longitudinal piston axis and, extending axially form the crown, a pair of gudgeon pin bosses defining a pin axis and spaced apart at opposite sides of an orthogonal thrust axis. A circumferentially discontinuous... | 03/01/2005 |
| 6467396 | Light box piston The invention aims at reducing the weight of a box piston having a running surface, the width in the pressure side is different from the width of the running surface on the counterpressure side. To this end, the piston has at least one bent channel that i... | 10/22/2002 |
| 6357341 | Piston of internal combustion engine In a reciprocating piston of an internal combustion engine comprising a piston skirt having a major-thrust-side skirt portion and a minor-thrust-side skirt portion, a projected circumferential width of the minor-thrust-side skirt portion is greater than a... | 03/19/2002 |
| 6286414 | Compact one piece cooled piston and method A compact one piece piston for use in an internal combustion engine has a compression height ("CH") of between 55 percent and 70 percent the piston diameter ("D") and a closed piston cooling gallery defined by a piston ring belt welded at spaced locations... | 09/11/2001 |
| 6152017 | Lightweight piston A piston (10) comprises a piston shaft (16) and an essentially cylindrical upper region (14). The piston shaft (16) essentially comprises two opposite shaft wall portions (16) relative to the pin axis. Two pin hubs (24) are also set back relative to the p... | 11/28/2000 |
| 5713262 | Engine piston having a recess defined in the lower surface of the head A piston, which reciprocates in a cylinder bore of an engine, is supplied with lubricating oil. The piston includes pin bosses provided under a piston head, a symmetrical pair of skirts, and side walls connecting the pin bosses and the skirts. The side wa... | 02/03/1998 |
| 5653204 | Piston assembly retaining device The design and construction of past piston pin assemblies includes a retaining device which adds stress concentration factors to the piston pin assembly, piston skirt or piston crown. The present invention provides a device for retaining the piston assemb... | 08/05/1997 |
| 5492052 | Piston-and-connecting rod assembly A piston-and-control rod assembly includes a hollow piston having a skirt; axially spaced, circumferential piston ring grooves provided in the skirt; a radial crown having an inner face; and a bearing block projecting from a central portion of the inner f... | 02/20/1996 |
| 5379680 | Piston for an internal combustion engine A piston for an internal combustion engine comprising a piston head provided with at least one piston ring groove and a piston body having a piston pin bore, and a compression height of less than 40% of the piston diameter. In order to be able to equalize... | 01/10/1995 |
| 5359922 | Head of two welded parts for two-piece articulated piston A method to manufacture an articulated piston head wherein the two portions composing the head, i.e. the top portion and the pin boss portion, are formed separately from blanks of forged or cast chromium-molybdenum steel or a low alloy steel, subjected to... | 11/01/1994 |
| 5307732 | Piston assembly having a wrist pin bolted therein The design and construction of past piston assemblies having a wrist pin bolted to a connecting rod have excessive weight and structural components, and requires more complex machining techniques and tooling. The present invention overcomes these problem ... | 05/03/1994 |
| 5279268 | Piston assembly with distributed loading and centrally fastened wrist pin The design and construction of past piston assemblies having a wrist pin bolted to a connecting rod had excessive structural components requiring more complex machining procedures and tooling. Additionally, the loading and bolting patterns allowed the wri... | 01/18/1994 |
| 5174193 | Pistons for engines or motors The piston comprises a crown (12), and a skirt 30 made of plastics material secured to the crown. The crown (12) is formed integrally with a depending boss (16) arranged to receive a gudgeon pin (18) by which the piston is connected to a connecting rod (2... | 12/29/1992 |
| 5115726 | Two-piece piston assembly A two-piece, or articulated, piston assembly for internal combustion engines, comprising a head composed of a top portion and a pair of pin bosses integral with it, a skirt portion, and a wrist pin mounted in the pin boss holes. The pin bosses are secured... | 05/26/1992 |
| 5072653 | Piston biased to one side to cover ring gap A piston for a reciprocating machine includes a split piston ring which is located in a circumferential groove in the cylindrical wall of the piston. The piston is adapted to be located in a cylindrical bore so that the piston ring sealingly engages the b... | 12/17/1991 |
| 5063893 | Piston structure for internal combustion engine A piston for an internal combustion engine is provided. This piston includes a piston body which has an upper ring land portion and a skirt portion, pin boss portions formed in the skirt portion into which a piston pin is inserted for attaching the piston... | 11/12/1991 |
| 4909132 | Curved supporting elements for joining piston pin bosses to piston head of internal combustion engine piston In order to achieve less deformation under gas pressure load and also under thermal load, the bottom piece of a piston with ring-carrying barrel is configured as a supporting cone tapering towards the piston pin and connected with the piston pin bosses by... | 03/20/1990 |
| 4843952 | Low-height articulated piston with skirt-overhanging guide portions on head A two-part, low compression height, open-ended hollow skirt-type piston for internal combustion engines has a piston pin creating an articulated connection of the separate skirt and head parts. Guide portions (5) protruding axially in the direction of the... | 07/04/1989 |
| 4730549 | Light-metal reciprocating piston A piston made of cast aluminum base alloy is provided with gudgeon pin bosses which are connected to the piston skirt by means of a frusto-conical strut which has recesses in the skirt and are specially dimensioned to leave large unsupported skirt areas t... | 03/15/1988 |
| 4715267 | Bearing surface for internal combustion engine piston skirt A piston for an internal combustion engine is provided with two separate skirt portions on either side of the gudgeon pin bore. Each skirt portion is the shape of a sector of a cylinder and is cantilevered on a pair of struts connected to the skirt member... | 12/29/1987 |
| 4690038 | Hydraulically actuated piston machine with bearing for connecting piston to piston rod A piston machine, particularly a hydraulically-actuated piston machine, comprises at least one cylinder having an axis, a piston axially slidable in the cylinder and having a piston bottom with an inner surface, a piston rod turnably connected with the pi... | 09/01/1987 |
| 4683808 | Light alloy piston for internal combustion engines A light alloy piston for internal combustion engines has a skirt which is closed at its lower end and at locations disposed adjacent to the bosses on both sides of the horizontal plane through the piston pin is set back so as to form respective recesses. ... | 08/04/1987 |
| 4644853 | Piston and bearing assemblies In a preferred embodiment, a crosshead piston assembly for four-stroke cycle engines includes a novel piston pin bearing assembly having opposed less than semicylindrical insert bearings retained by engagement of arcuately opposite coplanar edge surfaces ... | 02/24/1987 |
| 4548125 | Piston arrangement, particularly for an internal combustion engine A piston arrangement including a hollow piston, a piston pin extending within the piston, an intermediate abutment within the piston supporting the pin between its ends, and a transmission member, e.g., a connecting rod, engaging the pin on each side of t... | 10/22/1985 |
| 4358881 | Method for manufacturing a piston with a separate skirt A method for manufacturing a piston for internal combustion engines, compressors and the like, comprising a head portion articulately connected to a separate skirt portion, wherein the skirt portion comprises a steel tubular part obtained by cutting, bend... | 11/16/1982 |
| 4354426 | Expansion-controlled light alloy piston To provide for separate expansion control actions at the top and bottom edges of the skirt of an expansion-controlled light alloy piston, to prevent a direct propagation of deformation between the top and bottom edges of the skirt and to reduce the skirt ... | 10/19/1982 |
| 4350083 | Heat barrier for refrigeration compressor piston A piston intended for use in refrigeration compressors and other applications wherein a heat barrier is provided in the piston skirt between the head of the piston and the wrist pin. The heat barrier substantially reduces the conduction of heat from the h... | 09/21/1982 |
| 4338858 | Internal combustion engine piston A piston for internal combustion engines, preferably made of aluminum or its alloys, having freely suspended piston pin bosses connected by first ribs to the piston head at points of zero moment and by second ribs to the piston skirt. The piston skirt has... | 07/13/1982 |
| 4256022 | Piston for reciprocating internal combustion engines, typically diesel engines A piston for reciprocating internal combustion engines, especially Diesel engines, is provided having a crown exposed to the heat of combustion gases, a guide member spaced from said crown, a shell connecting said crown and guide member, a ring carrier co... | 03/17/1981 |
| 3971355 | Piston rod-connecting rod interconnections for internal combustion engines A piston has a pair of support members extending away from the piston head offset from a piston ring portion, a piston rod being carried on a connecting rod which is clamped between the support members by a bolt. The bolt is loosely received in a bore in ... | 07/27/1976 |
| 3943908 | One piece piston connected to a connecting rod for high speed four-stroke cycle internal combustion engines A one piece piston connected to a connecting rod, for high speed four-stroke cycle internal combustion engines, in which the piston top has a centrally arranged spherical combustion chamber with a constricted opening while the piston is made of cast iron,... | 03/16/1976 |
