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| Number | Title | Issue Date |
| 7341648 | Method for coating piston rings for internal combustion engine The invention relates to a method for coating piston rings (10) for internal combustion engines, wherein at least the bearing surface of the piston ring is provided with an anti-abrasion and anti-corrosion coating (12) by means of a PVD or electroplati... | 03/11/2008 |
| 7318397 | High efficiency high power internal combustion engine operating in a high compression conversion exchange cycle A piston (10), a spring (15) operatively coupled to a piston, the spring being inside (21) or outside (41) the piston, and if the spring is inside the piston, the diameter of the spring is equal to 0.7 to 0.9, and if it is outside of the ... | 01/15/2008 |
| 7284526 | Ellipsoid roller bearing piston ring An improved piston ring suitable for use in an internal combustion engine is disclosed comprising a plurality of races sized to receive elongate rollers disposed around the circumference thereof. The elongate rollers may be shaped as a prolate ellipsoid or other rou... | 10/23/2007 |
| 7213562 | Piston for a combustion engine and casting method for the production thereof The invention relates to a piston (1), which is comprised of an approximately circular cylindrical upper area (5) and of a lower area (6), having two hubs (7), which are set back toward the piston central axis (8) so that, in the u... | 05/08/2007 |
| 7210399 | Two-part piston for an internal combustion engine A two-part piston for an internal combustion engine has a piston head and a piston skirt. The piston head has a piston crown on the underside of which at least two boss lands, each provided with a head boss and a head boss hole are connected. The piston skirt has at... | 05/01/2007 |
| 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 |
| 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 |
| 6622613 | Multipiece piston A multipiece piston comprises a steel upper part and a lower part which is screwed to the upper part and which contains the hubs. The design of the piston improves the strength of the lower part and its resistance to material defects, and reduces producti... | 09/23/2003 |
| 6609454 | Piston with seal A method of forming a floating piston includes fabricating a piston cup, wherein the piston cup includes a top, a sidewall void of any seal-gripping irregularities, and an open end, and forming an elastomer seal over the sidewall of the piston cup. A floa... | 08/26/2003 |
| 6508162 | Dual alloy piston and method of manufacture A dual alloy metallic piston is made by casting a first alloy into a mold to form a corresponding first portion. Before the first alloy solidifies, a second alloy is cast into the mold to form a corresponding second portion of the piston. The first and se... | 01/21/2003 |
| 6499387 | Unified multi-piece piston and method of manufacture A method of manufacturing a piston for heavy-duty diesel engine applications comprises forming a piston body having a pair of pin bosses, and bonding separately formed skirt portions to the pin bosses. The resultant piston has the separately formed skirt ... | 12/31/2002 |
| 6318243 | Two-piece piston assembly An improved two-piece assembly having a piston skirt and piston crown made from two different materials. The piston assembly attaching to a piston rod without the use of an external bore in the piston skirt.... | 11/20/2001 |
| 6260472 | One-piece integral skirt piston and method of making the same A one-piece piston (20) formed by an upper crown (28) and a lower crown (30) having an integral skirt (24, 26). The upper crown (28) includes an upper surface (32) and a lower surface (34, 42). The lower crown (30) includes an upper surface (50) and two p... | 07/17/2001 |
| 6244161 | High temperature-resistant material for articulated pistons This invention relates to a high temperature-resistant piston head. The piston head includes a first portion formed of a first material of heat-resistant steel alloy and the second portion is formed of a second a material of steel alloy that may be the sa... | 06/12/2001 |
| 6240827 | Composite piston for reciprocating machine A composite piston and method for forming such a piston for a reciprocating machine such as an internal combustion engine. A blank is formed from a pair of dissimilar alloys, one of which has substantially greater properties such as strength or abrasion r... | 06/05/2001 |
| 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 |
| 6209446 | Piston for internal combustion engine and process of making same The present invention is a piston for use in an internal combustion engine and a method of manufacturing the piston. In the method of the present invention, a first block comprising a first alloy and a second block comprising a second alloy are press-forg... | 04/03/2001 |
| 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 |
| 5245913 | Piston of internal combustion engine A piston of an internal combustion engine, arranged to suppress engine noise and vibration while improving the frictional resistance and seizure resistance of a piston skirt. The piston skirt of the piston is formed at its outer peripheral surface with a ... | 09/21/1993 |
| 5193435 | Piston with ceramic load-transmitting pads A piston comprises a crown (12) and a skirt (20). At least a portion of the skirt (20) is formed of a ceramic material injection moulded directly on to the remainder of the skirt (20) or the crown (12). The ceramic material provides a plurality of pads (2... | 03/16/1993 |
| 5158052 | Aluminum alloy piston An abrasion and scuff resistant piston comprises a piston main body of aluminum alloy, a ring groove for retaining a piston ring, an abrasion resistant nickel plate layer covering at least the ring groove, a piston skirt, also of aluminum alloy and an abr... | 10/27/1992 |
| 5092289 | Light alloy piston In a light alloy piston for use in diesel engines for an indirect fuel injection, a body of fibrous material is embedded in the cast piston head and is formed with a shallow combustion recess. In order to improve the conduction of heat outside the portion... | 03/03/1992 |
| 5063894 | Pressure-diecast light-alloy piston for internal combustion engines In a pressure-diecast light-alloy piston for internal combustion engines, which piston comprises shaped fibrous bodies which are partly embedded in at least one of the piston head, ring zone, piston pin bosses and skirt of the piston, which bodies compris... | 11/12/1991 |
| 4955353 | Piston for internal combustion engine A piston head for an internal combustion engine is provided containing a polished nickel plated layer formed in the piston top and an anodized layer formed on at least the lower part of the uppermost piston ring groove in order to reduce the adverse affec... | 09/11/1990 |
| 4939984 | Investment-cast piston crown cap with encapsulated non-metallic insulating core Pistons for internal combustion engines, particularly compression ignition engines. The pistons have insulating crowns and include a crown having a cap thereon, extending over the crown surface area, the crown cap being composed of an iron-based or a nick... | 07/10/1990 |
| 4920864 | Reinforced piston A reinforced lightweight metal piston having fibers within the piston crown to reinforce the crown surface to improve the thermal properties and wear resistance of the crown surface. The reinforcing fibers are embedded in the piston metal using a pressure... | 05/01/1990 |
| 4863807 | Multi-layered thermal insulating piston cap A multi-layered insulating piston cap for cast metal pistons having an insulating, perforated metal sheet layer. A piston cap is provided having a top sheet continuous layer made of a heat and corrosion resistant metal for protecting the piston cap, a sec... | 09/05/1989 |
| 4798770 | Heat resisting and insulating light alloy articles and method of manufacture Light alloy articles comprising a body of light alloy having a composite fiber/light alloy layer, a sprayed heat-resistant alloy layer, and a sprayed ceramic base layer formed on the body in this sequence exhibit improved heat resistance and insulation an... | 01/17/1989 |
| 4790726 | Reciprocatory piston and cylinder machine A reciprocatory piston and cylinder machine particularly suitable for use as a vacuum pump includes a cylinder (17), a cylindrical piston (16) relatively slidably reciprocable within the cylinder (17), and means for substantially sealing the annular space... | 12/13/1988 |
| 4751871 | Multisectional piston with plural ceramic parts and rigidly connected piston rod for use in horizontally opposed piston internal combustion engine A multisectional piston for opposed-piston, slider-crank-drive internal combustion engines. The piston has a ceramic skirt (1), a skirt head (2), and a ceramic piston head (3) with fire land (4). The ceramic piston head is provided with annular groove (6)... | 06/21/1988 |
| 4746582 | Ceramic-metal composite body A ceramic-metal composite body including (a) a ceramic member, (b) a ferrous metal member bonded to the ceramic member, (c) an intermediate metallic member joined to the iron base member, and (d) an aluminum member bonded to the intermediate metallic memb... | 05/24/1988 |
| 4742759 | Ceramic insert cast piston Disclosed herein is a ceramic insert cast piston for an internal combustion engine which includes a head made of ceramic, a metal ring fitted around the peripheral portion of the ceramic head, and a piston body made of a metal by casting a metal around th... | 05/10/1988 |
| 4741253 | Piston for internal combustion engines A piston for internal combustion engines is disclosed, which includes a piston main body of metallic material, and a ceramic piston head member embedded in the top portion of the piston main body. The piston head member is formed on its peripheral surface... | 05/03/1988 |
| 4736676 | Composite piston A composite piston structure is disclosed which provides a simple and reliable means for joining a carbon-carbon or ceramic piston cap 11 with a metallic piston body 13. Attachment is achieved by means of a special geometry which compensates for differenc... | 04/12/1988 |
| 4735128 | Piston A piston for internal combustion engines made of a light alloy and comprising a skirt portion and a head portion, having a ceramic insert adapted on the head portion and connected to same by mechanical locking. The ceramic insert is provided with pores at... | 04/05/1988 |
| 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 |
| 4709621 | Internal combustion engine piston and a method of producing the same Disclosed herein is an internal combustion engine piston having a metal piston body and a piston cap constituted by a plurality of ceramic pieces and fixed to the top portion of the metal piston body, wherein the piston cap is composed of at least one kin... | 12/01/1987 |
| 4679493 | Reinforced pistons A reinforced piston is provided for an internal combustion engine. The uppermost piston ring groove is as close as possible to the crown of the piston. At least the lower surface of the groove is defined by an en-cast insert and overlying this is a portio... | 07/14/1987 |
| 4677901 | Fiber-reinforced piston for internal combustion engines and associated method of construction A fiber-reinforced piston for internal combustion engines, comprising a molded body of inorganic fiber forming a top land and a ring region of the piston. The molded body has a content of granulated fiber having larger particles of a particle diameter les... | 07/07/1987 |
| 4651630 | Thermally insulating pistons for internal combustion engines and method for the manufacture thereof A thermally insulating piston for internal combustion engines is provided on the piston crown or in its dished combustion space portion with a thermally insulating liner which on the side thereof facing the combustion space consists entirely of a ceramic ... | 03/24/1987 |
