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| Number | Title | Issue Date |
| 8113105 | Two-part piston for an internal combustion engine A two-part piston for an internal combustion engine has an upper part that has a pin having an outside thread on the underside of its piston crown, and has a lower part that has a crown part, onto which an expansion sleeve that can stretch elastically in the axial d... | 02/14/2012 |
| 7350438 | Connection rod for internal combustion engine An internal combustion engine connecting rod is designed with bolts having a minimum required strength. A strength safety factor Sfa is calculated based on an axial strength limit load FX of the bolt and the maximum load FB to be born by the bo... | 04/01/2008 |
| 7311075 | Split piston for an internal combustion engine The invention relates to a split piston for an internal combustion engine, comprising an upper piece, connected to a lower piece, by means of a screw connection. The screw connection comprises a tubular connector piece, mounted on the underside of the piston upper p... | 12/25/2007 |
| 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 |
| 7219641 | Piston for internal combustion engines The invention relates to a piston for internal combustion engines comprising a lower part which forms the shaft area and also comprising a piston upper part which is connected thereto by means of expandable screws and which forms the bottom and a ring area wherein t... | 05/22/2007 |
| 6453797 | Piston for an internal combustion engine A piston for an internal combustion engine, comprising a piston head (2) and at least one cooling chamber (4) that can be supplied with oil and is arranged underneath the head (2) of the piston, whereby the lower limit of the cooling chamber is formed by ... | 09/24/2002 |
| 6401680 | Bolted articulated piston A piston (20) for an internal combustion engine includes an upper crown (22) and a lower crown (24) that are each fabricated using a same strong material, such as steel and fastened together using a plurality of fasteners (50). The piston (20) provides in... | 06/11/2002 |
| 6260473 | Clamping device for a piston to be mounted Disclosed is a clamping device for a piston to be mounted, said clamping device being actuated mainly in the direction of pressure/counter-pressure, whereby the whole initial pressure is increased, resulting in greater anti-loosening safety. To that end t... | 07/17/2001 |
| 6216585 | Carbon-carbon engine components and method of fabrication An internal combustion engine component assembly including piston, wrist pin, and cylinder sleeve, all constructed of a matching carbon-carbon composite is disclosed. The piston is a two-piece assembly divided in crown and skirt, each fabricated individua... | 04/17/2001 |
| 6135008 | Piston with lubricant-scraping ring and lubricant return ports A piston assembly including a piston having a work surface, a sidewall extending from the work surface, and ports in the sidewall. The piston assembly also includes a flexible lubricant-scraping ring clamped to the piston between the work surface and the ... | 10/24/2000 |
| 6062125 | Piston-cylinder assembly In a piston-cylinder assembly with a shaftless piston, the aim is to improve the lateral guidance of the connecting rod, to reduce edge wear and the seizing tendency in the event of fault during the combustion process. Consequently, the piston has at leas... | 05/16/2000 |
| 5975040 | Piston unit for an internal combustion engine Piston unit for an internal combustion engine, especially for a large diesel engine, comprising at least three main parts located in successive order in the direction of the longitudinal axis of the piston and to be connected to each other. The piston uni... | 11/02/1999 |
| 5921755 | Dry vacuum pump A vacuum pump is provided with at least one cylinder having a cylinder liner and a piston mounted for reciprocating movement within the cylinder liner. The piston is connected to a crankshaft for reciprocating the piston and the piston is provided with a ... | 07/13/1999 |
| 5772412 | Pump incorporating pressure-regulated venting means The invention provides a pump comprising at least one piston (26, 28) movable in a reciprocating manner within a chamber (12), sealing means (32a, 32b) located between the piston (26, 28) and the interior wall of the chamber (12), and venting means (36) f... | 06/30/1998 |
| 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 |
| 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 |
| 5092290 | Engine piston assembly with planar pin mounting surface An internal combustion engine piston assembly is provided wherein the underside of the piston has planar load bearing surfaces disposed perpendicularly to the axis thereof and the ends of the piston pin are provided with mating planar surfaces for fasteni... | 03/03/1992 |
| 5072654 | Piston and bearing assemblies A novel prefinished piston pin insert bearing is described wherein the tight radial clearances required for acceptable bearing function are maintained in spite of the tolerances required for assembly through a unique inner bearing surface geometry and thr... | 12/17/1991 |
| 4932314 | Segmented piston A split piston in an internal combustion engine, having a base rockably secured to the connecting rod, and a detachable ring head which interfaces with the cylinder wall. The detachable ring head is snugly fitted onto a cylindrical extension of the base h... | 06/12/1990 |
| 4928578 | Pistons with bearing members Pistons are described comprising a crown portion and a skirt portion, the crown portion having depending from the underside thereof a boss, the boss having secured thereto at least two bearing members in fixed relationship to the piston body and which bea... | 05/29/1990 |
| 4917003 | Piston to rod mounting assembly A hydraulic cylinder, piston and rod assembly wherein the piston is secured to the rod in an efficient and inexpensive manner. The piston includes a threaded interior which is secured to a corresponding threaded portion on the end of the piston rod. An op... | 04/17/1990 |
| 4798270 | Hydraulically actuated sliding-caliper disc brake An actuator for a hydraulically actuated caliper disc brake having a brake shoe comprises an actuating piston of two-part construction mounted for displacement in a cylinder and acted upon by a pressure fluid. The actuator has a cup-shaped member of cast ... | 01/17/1989 |
| 4727795 | Pistons The height of a piston for an internal combustion engine is reduced by the provision of gudgeon pin bores which intersect or at least partly intersect a ring band extending around the crown. This allows the mass of the piston to be reduced and allows impr... | 03/01/1988 |
| 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 |
| 4667627 | Engine parts and method of producing the same An engine part and a method of producing the same are disclosed. The engine part includes a ceramic member, a metallic member secured to the ceramic member, and a metallic engine part body fixed to the metallic member, wherein the outer peripheral portion... | 05/26/1987 |
| 4651629 | Piston of refractory materials, particularly for compression-ignition engines A piston (2) is of refractory materials, particularly for a compression-ignition engine of the type having a head (4), a skirt (6) and their mutual fastening means. According to the invention, this skirt (6) is formed entirely of a refractory material and... | 03/24/1987 |
| 4603617 | Multi-part plunger piston for internal combustion engines A multi-part plunger piston for internal combustion engines, comprises a piston upper part and lower part which engage one on the other through coinciding annular abutment surfaces. The parts are connected with one another by screws which pass through the... | 08/05/1986 |
| 4577595 | Piston for a reciprocating piston internal combustion engine A piston for a reciprocating piston internal combustion engine, in which the piston top (11) is secured to the wrist pin (14) by way of two support bearings (18) independent of the piston skirt (12). The piston ring carrier (16) connected with the piston ... | 03/25/1986 |
| 4548127 | Piston for internal combustion engine A piston for an internal combustion engine comprising a piston body (1) and a crown portion (3) that are connected by anchoring means comprising elongate members (7,23,26,79,80) that extend from the crown portion (3) into the piston body (1) so as to tran... | 10/22/1985 |
| 4532686 | Method of making a piston bottom A piston bottom for large capacity internal-combustion engines is made by forging a saucer-shaped blank from refractory-forging steel and then in a second forging step transforming the saucer-shaped blank into a cup configuration with a planar rim of the ... | 08/06/1985 |
| 4531269 | Method of assembling an improved heat insulated piston An improved heat insulated piston assembly for an internal combustion engine and a method of assembly. The improved piston assembly includes a piston constructed of a sleeve having an interference fit about a heat insulated core. The core has a first end ... | 07/30/1985 |
| 4433616 | Piston assembly for an internal combustion engine A piston assembly for an internal combustion engine having a rotatable crankshaft. The piston assembly includes a piston body having a concave configured cavity formed in one end and a plurality of recesses formed in its outer circumference. The piston bo... | 02/28/1984 |
| 4375782 | Composite piston for internal combustion engines A composite piston for internal combustion engines having a lower part and an upper part composed of ferrous material and joined together by a centering screw-threaded ring, is provided with the screw-threaded ring which comprises internal screw threads a... | 03/08/1983 |
| 4346646 | Piston for internal combustion engines Piston for internal combustion engines having a piston body consisting of light metal and a crown plate consisting of a metal of lower thermal conductivity which is secured axially to the piston body by means of necked-down screws and centered radially in... | 08/31/1982 |
| 4342291 | Expandable piston motor An internal combustion engine comprises a piston having first and second coaxial parts movable axially relative to each other in the direction of reciprocation of the piston and having a chamber therebetween which varies in volume with the relative moveme... | 08/03/1982 |
| 4185544 | Piston for combustion engines A piston comprising a lower part with a bore having a concave surface against which abuts the convex surface of a head of an expansion socket, the center of curvature of the concave surface lying on the axis of the bore and the head being formed in two ha... | 01/29/1980 |
| 4084553 | Piston and rod assembly with displacement features An improved piston and rod assembly that can be readily disassembled at several places so that the entire assembly need not be necessarily removed from an engine during servicing, and which includes dismantleable bearings around a cross pin about which th... | 04/18/1978 |
| 4083292 | Piston with high top ring location An improved piston assembly comprising a generally cylindrical body having at one end a peripheral shoulder and at the other end a depending skirt, an annular ring groove protection band formed of hard metal and having a peripheral, radially outwardly ope... | 04/11/1978 |
| 4073221 | Light-weight piston assemblies An improved piston assembly including a generally cylindrical piston body having a crown and a depending skirt and being formed of a light-weight metal, an annular ring groove protection band formed of a hard metal disposed about the body adjacent the cro... | 02/14/1978 |
| 4072088 | Light-weight piston assemblies A light weight piston assembly including a piston body formed of a light-weight metal and having a crown and a depending skirt, an annular recess about the end of the body adjacent the crown and opening toward the crown, the portion of the recess immediat... | 02/07/1978 |
