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| Number | Title | Issue Date |
| 7337539 | Method for production of a coolable annular support for internally cooled piston rings A method of producing a coolable annular support for internally cooled piston rings and comprising an annular body, a cooling channel plate and respective tubular bodies or plate-shaped bodies disposed on or in openings of the plate. End portions of legs of the cool... | 03/04/2008 |
| 7127813 | Method for the production of pistons having depression edge armoring, for internal combustion engines A method for the production of pistons having depression edge armoring for internal combustion engines, in which a more heat-resistant armoring ring, in comparison with a forged piston blank having a combustion depression, is connected with the piston blank in the r... | 10/31/2006 |
| 7093529 | Composite piston Devices, piston components, and methods are provided for an improved piston. One embodiment for a piston component includes a base having a side to receive a piston body. A tang is provided to the base and extends outward from the side of the base which is to receiv... | 08/22/2006 |
| 7024982 | Combination of piston and piston ring A combination of piston and piston ring includes a piston having a piston ring groove in which at least the groove portion of the piston is made of steel, a piston ring made of cast iron and fitted into the piston ring groove, and a hard coat film formed to at least... | 04/11/2006 |
| 6604284 | Manufacturing method of piston with a hollow space for compressor A method of manufacturing a piston for a compressor and a piston manufacturing machine, with which a hollow piston that can remain light while in operation after being built into a compressor can be produced, are provided. A piston assembly 51 comprising ... | 08/12/2003 |
| 6550138 | Piston pin assembly A method for reducing the incidence of piston pin failure by providing a retainer assembly for piston pin plugs such that the plugs cannot be removed or shaken lose during operation. A plastic rod is inserted into the piston pin, and the rod is ultrasonic... | 04/22/2003 |
| 6266878 | Process for producing variable displacement compressor pistons having hollow piston bodies and integral actuator rods Variable displacement pistons are produced wherein hollow piston bodies are integrally formed with associated actuator arms to ensure proper alignment of the bodies and rods. The process utilizes a two-axis press to first form a pair of actuator arms by w... | 07/31/2001 |
| 5743012 | Piston and piston ring A method of reducing wear between the radial faces of a piston ring and the radial faces of the co-operating piston ring groove in an aluminium alloy piston is described. The method comprises the steps of locally alloying the region in which the piston ri... | 04/28/1998 |
| 4971003 | Piston of aluminum alloy for internal combustion engines A fiber reinforced wire set along the edge of an open combustion chamber, which is provided in the piston head of a piston, is remelted with the edge of the combustion chamber, and solidified in order to reinforce the edge of the combustion chamber.... | 11/20/1990 |
| 4651631 | Manufacture of pistons A piston is formed in two parts. The main part is formed by gravity die casting from aluminum or aluminum alloy and a second part of the piston is formed by a squeeze casting process to produce a material which is stronger and more resistant than the grav... | 03/24/1987 |
| 4360956 | Piston having at least one piston ring groove A piston made of an aluminum alloy has at least one piston ring groove defined by two side walls and a bottom wall. At least one preferably both side walls of the piston ring groove(s) are formed or defined by a zone, which has been hardened by an energy ... | 11/30/1982 |
| 4125926 | Method of making aluminum piston with reinforced piston ring groove An aluminum piston for use in heavy duty internal combustion engines is disclosed, in which the grooves for receiving the piston rings are formed in stainless steel inserts fusion bonded directly to the aluminum without an intermediate metallic layer othe... | 11/21/1978 |
