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| Number | Title | Issue Date |
| 7380493 | Compressor A reciprocating compressor is provided that includes a compression chamber inside of a cylinder and a piston inserted therein. The piston includes a head, a skirt extended from a lower end of the head so as to be spaced away from an inside wall of the cylinder, and ... | 06/03/2008 |
| 7331276 | Piston for a two-cycle engine A piston for a two-cycle engine having a piston head and a piston wall in which are disposed wrist pin eyes. At least one undercut is formed between the underside of the piston head and the wrist pin eyes at a distance from the piston head. The undercut extends from... | 02/19/2008 |
| 7302884 | Piston A number of embodiments of a piston may have a shape that provides enhanced piston guidance. In such embodiments, the piston shape may include an axial profile that is configured to provide certain thrust load characteristics. ... | 12/04/2007 |
| 7143685 | Monobloc piston having open floor A monobloc piston assembly has at least two parts fixedly joined together forming a piston body having an oil cooling gallery. The oil cooling gallery is defined by an upper wall, a lower wall, and a pair of radially spaced inner and outer annular walls. A skirt is ... | 12/05/2006 |
| 6990890 | Monobloc piston having open floor A monobloc piston assembly has at least two parts fixedly joined together forming a piston body having an oil cooling gallery. The oil cooling gallery is defined by an upper wall, a lower wall, and a pair of radially spaced inner and outer annular walls. A skirt is ... | 01/31/2006 |
| 6935220 | Contoured piston A piston for use in internal combustion engines or reciprocating compressors such as those utilized in air-brake systems for heavy duty freight vehicles. The body of the piston of the present invention is contoured in manner to reduce the undesirable build-up of oil... | 08/30/2005 |
| 6371009 | Structural matrix for a piston and connecting-rod assembly The present invention, being a continuation-in-part of the Reinforced Wrist-pin, makes use of a traversing reinforcing matrix for the non-mechanical surfaces of the piston and connecting-rod components' assembly. Interposing holes, or spacial impressions,... | 04/16/2002 |
| 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 |
| 5562074 | Piston for internal-combustion engines A piston for an internal-combustion engine has two webs respectively between the piston shaft and the pin eyes displaced toward the inside thereof. In order to achieve sufficient stability and rigidity, as well as a low-wear moldability one of the webs be... | 10/08/1996 |
| 5331932 | Engine piston A piston skirt has narrowed relief sections adjacent piston bosses and between first and second relief sections. The first relief sections extend between a piston head and respective piston bosses whist the second relief sections extend downward from the ... | 07/26/1994 |
| 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 |
| 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 |
| 4913323 | Stepped piston for pressure operated dispensing container A piston is longitudinally slidable within a pressurized container to dispense materials from the container. The piston has a generally annular sidewall and a traverse barrier wall at one end of the sidewall and integral therewith to define a cup-shaped c... | 04/03/1990 |
| 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 |
| 4867119 | Engine piston assembly and forged piston member therefor having a cooling recess Present day diesel engines having aluminum piston assemblies are limited to combustion chamber pressures of approximately 12,410 kPa (1,800 psi) whereas the desire is to increase such pressures up to the 15,170 kPa (2,200 psi) range. To reach such levels ... | 09/19/1989 |
| 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 |
| 4829954 | Method of forming self-sealing piston A spherically-shaped piston is rigidly attached to a connecting rod for reciprocating and tilting motion within a borehole in response to rotation of a crankshaft having an associated crank which is rotatably attached to the connecting rod. Web and ribs a... | 05/16/1989 |
| 4817505 | Piston with stiffening structure for lower skirt regions Pistons are described having improved stiffness of the lower skirt regions to improve piston guidance and oil film distribution. The pistons comprise a crown portion including piston ring grooves and a skirt portion, the skirt portion being divided into a... | 04/04/1989 |
| 4785774 | Piston for an internal combustion engine A piston for an internal combustion engine including a crown, a skirt and bosses. The skirt has a circumferentially extending faucet rib in a lower portion of the skirt and reinforcing ribs which extend in a thrust and thrust-opposing direction of the pis... | 11/22/1988 |
| 4781159 | Composite piston for use in the cylinder of a diesel engine A composite piston for use in the cylinder of a diesel engine has coaxial first and second sections and a piston pin which articulately connects the sections to each other and to the piston pin bushing of the connecting rod. The first section has a round ... | 11/01/1988 |
| 4765292 | Self-sealing piston apparatus A spherically-shaped piston is rigidly attached to a connecting rod for reciprocating and tilting motion within a borehole in response to rotation of a crankshaft having an associated crank which is rotatably attached to the connecting rod. Web and ribs a... | 08/23/1988 |
| 4752995 | Manufacture of pistons A method is disclosed of manufacturing a piston having a skirt on which are formed a plurality of bearing surfaces, each bearing surface being at a predetermined axial position on the skirt, being spaced outwardly of the skirt to a required radial dimensi... | 06/28/1988 |
| 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 |
| 4703875 | Low mass piston for aerosol container An injection-molded piston for an aerosol container has a face portion for contacting and exerting pressure on material to be dispensed, and a thin, flexible skirt depending axially from and circumscribing the face portion for forming an effective seal ag... | 11/03/1987 |
| 4702151 | Pistons A piston comprises a crown (10) and a ring band (11) carried on two gudgeon pin bosses (12a, 12b) by two supports (20). There are upper and lower pairs of struts (21a, 21b, 21c, 21d) on each side of the gudgeon pin bosses, one strut of each pair projectin... | 10/27/1987 |
| 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 |
| 4674399 | Pistons for internal combustion engines A piston for an internal combustion engine has the conventional skirt replaced by top and bottom bearing surfaces spaced apart by a substantial gap of constant width. The top bearing surfaces are connected to the piston crown through the ring band whereas... | 06/23/1987 |
| 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 |
| 4644852 | Actuator having tolerance to ballistic damage An actuator (10) tolerant of ballistic damage thereto includes a piston (25) longitudinally reciprocable within a cylinder (15) and connected to a rod (30), the piston comprising a plurality of longitudinally stiff, circumferentially spaced ribs (35) join... | 02/24/1987 |
| 4581981 | Actuator having tolerance to ballistic damage An actuator (10) tolerant of ballistic damage thereto includes a piston (25) longitudinally reciprocable within a cylinder (15) and connected to a rod (30), the piston comprising a plurality of longitudinally stiff, circumferentially spaced ribs (35) join... | 04/15/1986 |
| 4535682 | Pistons A piston for an engine or motor has a skirt which includes two portions which are urged towards an associated cylinder during the various strokes of the working cycle. Each portion is provided with a bearing surface or surfaces for sliding engagement with... | 08/20/1985 |
| 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 |
| 4274372 | Lightweight piston for internal combustion engines In a cast light-alloy piston having a skirt which is recessed adjacent to the piston pin bosses, the two sides of the skirt are unsymmetrical with respect to the piston pin bosses. For an improved adaptation to the different conditions of operation of the ... | 06/23/1981 |
| 4207808 | Piston for reciprocating internal combustion engines, typically diesel engines An improved piston structure for Diesel and like reciprocating piston engines is provided having a top and foot, a sealing section on said piston connecting said top and foot, a guide section articulatedly connected to said sealing section through trunnio... | 06/17/1980 |
| 4170926 | Fluted core disc brake piston A plastic disc brake piston is disclosed with a novel fluted inner core design, giving a piston with superior structural strength, crack resistance, and improved heat dissipation when used in disc brake assemblies.... | 10/16/1979 |
