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| Number | Title | Issue Date |
| 7250221 | Method of producing clad metal products A method of producing a clad metal ingot suitable for rolling to form a clad metal sheet, and the clad metal ingot so produced. The method involves providing a solid core ingot having an upper side with a rolling face thereon having cavities extending inwardly into ... | 07/31/2007 |
| 7188841 | Secondary piston seal A secondary seal is provided for an internal combustion engine having a piston, cylinder bore, ring seal, secondary seal, and leak path. Forces are applied from the combustion side of the piston through a cylinder gap and a leak path to the secondary seal. The secon... | 03/13/2007 |
| 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 |
| 6838196 | Nickel-aluminide based wear resistant material for piston rings A piston ring comprises a coating of a wear-resistant composite composition, particularly intended for high temperature applications. The wear-resistant composite composition comprises a ceramic compound and at least 50 volume %, based on the total volume of the wea... | 01/04/2005 |
| 5598763 | Flutter free piston ring assembly A piston and ring assembly operative within a cylindrical bore wall to retain fluid to one side. The piston has a side wall for movement along the cylindrical wall and has one or more spaced grooves in the side wall, each groove defining a pair of interio... | 02/04/1997 |
| 5490445 | Ultra low device volume piston system A piston and ring assembly operative within a cylindrical bore wall to retain pressurized fluid to one side of the assembly, the piston having a crown and an annular side wall for movement along the bore wall. The assembly comprises a piston having at lea... | 02/13/1996 |
| 5443919 | Slide member A slide member includes a surface layer having a slide surface for sliding on a mating member, wherein the surface layer has metal crystals belonging to a cubic system with a crystal plane of high atomic density directed toward the slide surface and form ... | 08/22/1995 |
| 5443920 | Slide member A slide member includes a surface layer having a slide surface for sliding on a mating member, wherein the surface layer has metal crystals belonging to a cubic system with a crystal plane of high atomic density directed toward the slide surface and form ... | 08/22/1995 |
| 5392692 | Antiblow-by piston and seal construction for high temperature applications A piston and ring assembly operative within a cylindrical bore wall to retain fluid to one side of the assembly, comprising a piston having at least one annular stepped groove in the side wall of the piston, the groove being stepped into uppermost and low... | 02/28/1995 |
| 4899702 | Aluminum alloy piston and piston-ring assembly treated to suppress agglutination of the piston alloy to a piston-ring A piston and piston-ring assembly includes a piston and piston-rings located in piston-ring grooves formed in the piston. Such a kind of surface hardening treatment as is accompanied by an increase in surface roughness, such as alumite treatment, is appli... | 02/13/1990 |
| 4643079 | Iron piston having selectively hardened ring groove A cast iron piston characterized by a pearlitic matrix microstructure comprises a ring groove defined by opposed faces that are selectively hardened adjacent the piston side wall. The hardened surfaces are characterized by a martensitic matrix microstruct... | 02/17/1987 |
| 4599936 | Integral strut and piston groove protector An integral strut and groove protector assembly is provided for incorporation within a light metal piston. The assembly includes a ring groove protector, an expansion control strut, and a connecting member connecting the groove protector and strut. All ar... | 07/15/1986 |
| 4432313 | Aluminum base material with hard facing deposit An aluminum base material with a hard facing deposit which shows extremely good hot hardness properties when subjected to high operating temperatures. The invention provides a hard facing deposit which shows a hot hardness of at least 100 BHN at 600° F.,... | 02/21/1984 |
| 4387627 | Piston ring groove reinforcement A piston having a piston ring groove which is bounded on at least one side by a reinforcing element. The reinforcing element is provided with at least one recess into which material of the piston extends to establish a bond between the reinforcing element... | 06/14/1983 |
| 4364159 | Method for manufacturing a forged piston with reinforced ring groove The method effects a tight fit of a ferrous ring reinforcement at the head end of an aluminum alloy piston which tight fit remains during use of the piston. The procedural steps of the preferred method include: providing an aluminum alloy piston slug with... | 12/21/1982 |
| 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 |
| 4233490 | Method of reinforcing aluminium alloy piston ring groove Disclosed is a method of reinforcing an aluminium alloy piston ring groove wherein the piston body is fused to a certain depth around the periphery thereof in the zone where the ring groove is to be cut, with simultaneous introduction of an alloying addit... | 11/11/1980 |
| 4129309 | Austenitic cast iron This invention provides an austenitic cast iron especially suitable for reinforcements in aluminium pistons and containing 2-6% Ni, 1.8 to 4.0% C, 1-3% Si, 6-12% Mn, 5-7% Cu, less than 0.08% Cr, 0.3 to 2% Al and 0.05 to 0.3% Ti.... | 12/12/1978 |
| 4128250 | Pistons and piston rings An annular reinforcement for piston ring grooves, the reinforcement being provided with inclined bores so that when the reinforcement is built into the piston and the bores are filled with material integral with the piston, movement of the reinforcement b... | 12/05/1978 |
| 4079661 | Piston construction An improved piston construction comprising a piston body having a crown and a depending skirt, a peripheral groove about the body intermediate the crown and the skirt closely adjacent the crown, a grooved insert band in the groove and adapted to receive a... | 03/21/1978 |
| 4074616 | Aluminum piston with steel reinforced piston ring grooves 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... | 02/21/1978 |
