Class / Patent application number | Description | Number of patent applications / Date published |
092181000 | With fluid passage in piston face | 15 |
20080229923 | Piston, Especially Cooling Channel Piston, Comprising Three Friction-Welded Zones - A piston, especially a cooling channel piston of an internal combustion engine, has an upper part and a lower part which can be produced separately from each other and subsequently be assembled. The upper part has at least three radially peripheral joining webs and the lower part likewise at least three radially peripheral joining webs. During assembly, the webs are put together and connect the upper part firmly to the lower part. | 09-25-2008 |
20080245228 | Shape Detail of a Piston to Avoid Jamming Within a Distorted Bore | 10-09-2008 |
20080271597 | METHODS AND APPARATUS FOR OPERATING AN INTERNAL COMBUSTION ENGINE - A piston assembly for an internal combustion engine is provided. The piston assembly includes at least one connecting rod comprising at least one wall that defines at least one first cooling fluid passage within the connecting rod. The piston assembly also includes at least one piston body including at least one wall coupled to the connecting rod. The piston body wall defines at least one second cooling fluid passage within the piston body that is coupled in flow communication with the first cooling fluid passage. The piston assembly further includes at least one piston pin positioned within the second cooling fluid passage and is coupled to at least a portion of the connecting rod and at least a portion of the piston body. The piston assembly also includes at least one piston crown including at least one wall coupled to the piston body. The piston crown wall defines at least one third cooling fluid passage within the piston crown. The third cooling fluid passage is coupled in flow communication with the second cooling fluid passage. | 11-06-2008 |
20100218673 | PISTON WITH CENTRAL DIRECTIONAL OIL FLOW AND WRIST PIN LUBRICATION FEATURE AND METHOD OF CONSTRUCTION THEREOF - A piston has a piston body extending along a central axis. The piston body has an upper crown portion and a lower crown portion. The upper crown portion has an upper combustion wall and an at least one annular upper rib depending from the upper combustion wall to a free end. The lower crown portion has at least one annular lower rib extending to a free end that is fixed to the at least one upper rib and an inner gallery floor extending radially inwardly relative to the at least one lower rib. The upper crown portion has an upper post depending from the upper combustion wall along the central axis to a free end. The lower crown portion has a lower post extending upwardly from the inner gallery floor along the central axis to a free. Together, the upper post and the lower post form a labyrinth passage. | 09-02-2010 |
20110079142 | Cylinder Phaser Valves - A phaser valve for a piston and cylinder assembly helps to keep a pair of pistons in phase with each other. The phaser valve includes a poppet which is slidable between opposing seats of a valve housing. The poppet includes a head and a stem, both the head and the stem having concave portions which facilitate the flow of hydraulic fluid across the valve. The poppet head has two generally conical ends, so that the head makes a fluid-tight seal with a seat when the head is urged towards either seat. Due to its construction, the phaser valve may be built to fit within a very small space, while still allowing a substantial flow of fluid when the head is not in abutment with one of the seats. | 04-07-2011 |
20110107910 | PISTON WITH BLOW-BY FEATURE AND METHOD OF PREVENTING CATASTROPHIC FAILURE TO AN INTERNAL COMBUSTION ENGINE - A piston and method is provided that inhibits the potential catastrophic damage to an internal combustion engine, thereby reducing the risk of costly damage to the engine. The piston includes a piston body having an upper combustion surface separated from an internal cooling chamber by a wall. The a pocket extends into the upper combustion surface to a closed bottom surface of the wall. A tubular member is disposed in the pocket. The tubular member extends upwardly from the upper surface. Should a valve head drop from its normal operating position, the valve head impacts the tubular member and forms a blow-by through passage extending from the upper combustion surface into the cooling chamber. | 05-12-2011 |
20110232479 | PISTON WITH A DUCT UNDER A GASKET - The invention relates to a piston having a first face, a second face opposite to the first face, a third face connecting said first and second faces together and presenting a groove, and a sealing gasket housed in said groove. The piston includes a duct constituted by a first segment situated inside the piston and connecting said first face to said groove, by a second segment situated inside the piston and connecting said second face to said groove, and by an intermediate segment connecting together said first and second segments and crossing said groove, the walls of said intermediate segment being formed by the walls of said groove and by said sealing gasket in such a manner that said intermediate segment forms a leaktight tube that opens out solely via the first segment and via the second segment, said intermediate segment presenting at least one obstacle suitable for impeding the flow of fluid that flows along said intermediate segment. | 09-29-2011 |
20120279389 | OIL GALLERY PISTON WITH IMPROVED THERMAL CONDUCTIVITY - A method of making a piston with enhanced thermal conductivity. In one embodiment, the method includes providing a piston with an oil gallery, the piston made of a material; and depositing a layer of a material in the oil gallery, the material having a higher thermal conductivity than a thermal conductivity of the piston material. Another aspect of the invention is a piston having enhanced thermal conductivity. | 11-08-2012 |
20120291626 | PISTON FOR AN AIR SPRING OF A HEAVY-DUTY VEHICLE - A piston for an air spring of a heavy-duty vehicle includes a sidewall and a central hub. The sidewall and the central hub are attached to a first bottom plate of the piston. A top plate is removeably attached to a top portion of the sidewall and a top portion of the central hub. A bottom portion of said central hub includes a second bottom plate that is recessed relative to the first bottom plate for attachment to a piston mounting pedestal that is in turn mounted to a beam of a suspension assembly of the heavy-duty vehicle. | 11-22-2012 |
20130213218 | COOLING DUCT PISTON AND METHOD FOR PRODUCING THE SAME - A cooling duct piston ( | 08-22-2013 |
20150020681 | Stroke Piston for a Stroke Piston Compressor for Generating Compressed Air for a Vehicle - A stroke piston for a stroke piston compressor for generating compressed air for a vehicle, such as a commercial vehicle, includes a piston body with a piston floor, a piston skirt with piston skirt walls and pin hubs for receiving a piston pin, and at least two piston rings, which can be inserted into circumferential ring grooves of the piston body. Ridges of the piston body are provided between each two ring grooves and between the piston floor and the first ring groove arranged closest to the piston floor and the ring groove arranged closest to the piston skirt facing away from the other ring groove or grooves. At least one of the ridges is recessed at least over a partial section of its ridge height, which is measured parallel to the axis of the piston body, with at least one recess relative to the diameter of the piston body. | 01-22-2015 |
20100139479 | VARIABLE COMPRESSION RATIO PISTON WITH RATE-SENSITIVE RESPONSE - A hydraulic variable compression ratio (VCR) piston for use in an internal combustion engine. The piston is a two-part piston, in which a gudgeon pin carrier slides within an outer sleeve. A variable volume upper chamber is formed between the top of the gudgeon pin carrier and the end of the outer sleeve. When the upper chamber fills with oil, its volume increases, and the overall piston geometry is longer. This reduces the piston clearance in the cylinder and increases cylinder pressure. At a given maximum cylinder pressure or at a given rate of increase of cylinder pressure, oil from the upper chamber is relieved by using a rate-sensitive pressure relief valve. | 06-10-2010 |
20130305919 | PRODUCTION OF MULTI-PART, JOINED VALVE COMPONENTS IN HYDRAULIC APPLICATIONS WITH JOINT SEALING PROFILES - The invention relates to a valve component, in particular for a piston or a valve, comprising at least one first disk-shaped joining part and at least one second disk-shaped joining part, wherein the first and second joining part each have at least one opening, and wherein once the joining parts have been joined, the opening in the joining parts interacts in such a way that a channel is formed and a fluid medium can flow through the channel. In first and second regions at the joining parts, an at least partially peripheral elevation and/or depression interact with one another in sealing fashion once joined. | 11-21-2013 |
20140060320 | PISTON FOR AN AIR PUMP - A piston for an air pump has a connecting rod and a sealing valve. The connecting rod has a seat. The seat has a groove and a retaining surface. The groove is defined in an outer surface of the seat. The retaining surface is adjacent to the groove. The sealing valve movably engages the seat of the connecting rod and has an engaging ring and a sealing part. The engaging ring has an inwall which extends into the groove and has an engaging surface facing the retaining surface. The sealing part is connected with the inwall of the engaging ring and sealingly covers the through hole. The sealing valve is not prone to deformation and warpage during the operation of the piston to prevent any operating noise problem. | 03-06-2014 |
092182000 | Passage communicates with packing receiving recess | 1 |
20110168014 | Reciprocating Pump Having a Pressure Compensated Piston - A pump including a pressure compensated piston is disclosed. In some embodiments, the pump includes a piston with an annular body and an annular sealing element disposed radially outward of the annular body. The annular body has a radially-facing outer surface adjacent an inner surface of the sealing element and an axially-facing surface with an inlet port. A flowpath extends between the inlet port and the radially-facing outer surface of the annular body. | 07-14-2011 |
092181000 | Passage thru piston to opposite chamber | 3 |
20080229923 | Piston, Especially Cooling Channel Piston, Comprising Three Friction-Welded Zones - A piston, especially a cooling channel piston of an internal combustion engine, has an upper part and a lower part which can be produced separately from each other and subsequently be assembled. The upper part has at least three radially peripheral joining webs and the lower part likewise at least three radially peripheral joining webs. During assembly, the webs are put together and connect the upper part firmly to the lower part. | 09-25-2008 |
20080245228 | Shape Detail of a Piston to Avoid Jamming Within a Distorted Bore | 10-09-2008 |
20080271597 | METHODS AND APPARATUS FOR OPERATING AN INTERNAL COMBUSTION ENGINE - A piston assembly for an internal combustion engine is provided. The piston assembly includes at least one connecting rod comprising at least one wall that defines at least one first cooling fluid passage within the connecting rod. The piston assembly also includes at least one piston body including at least one wall coupled to the connecting rod. The piston body wall defines at least one second cooling fluid passage within the piston body that is coupled in flow communication with the first cooling fluid passage. The piston assembly further includes at least one piston pin positioned within the second cooling fluid passage and is coupled to at least a portion of the connecting rod and at least a portion of the piston body. The piston assembly also includes at least one piston crown including at least one wall coupled to the piston body. The piston crown wall defines at least one third cooling fluid passage within the piston crown. The third cooling fluid passage is coupled in flow communication with the second cooling fluid passage. | 11-06-2008 |
20100218673 | PISTON WITH CENTRAL DIRECTIONAL OIL FLOW AND WRIST PIN LUBRICATION FEATURE AND METHOD OF CONSTRUCTION THEREOF - A piston has a piston body extending along a central axis. The piston body has an upper crown portion and a lower crown portion. The upper crown portion has an upper combustion wall and an at least one annular upper rib depending from the upper combustion wall to a free end. The lower crown portion has at least one annular lower rib extending to a free end that is fixed to the at least one upper rib and an inner gallery floor extending radially inwardly relative to the at least one lower rib. The upper crown portion has an upper post depending from the upper combustion wall along the central axis to a free end. The lower crown portion has a lower post extending upwardly from the inner gallery floor along the central axis to a free. Together, the upper post and the lower post form a labyrinth passage. | 09-02-2010 |
20110079142 | Cylinder Phaser Valves - A phaser valve for a piston and cylinder assembly helps to keep a pair of pistons in phase with each other. The phaser valve includes a poppet which is slidable between opposing seats of a valve housing. The poppet includes a head and a stem, both the head and the stem having concave portions which facilitate the flow of hydraulic fluid across the valve. The poppet head has two generally conical ends, so that the head makes a fluid-tight seal with a seat when the head is urged towards either seat. Due to its construction, the phaser valve may be built to fit within a very small space, while still allowing a substantial flow of fluid when the head is not in abutment with one of the seats. | 04-07-2011 |
20110107910 | PISTON WITH BLOW-BY FEATURE AND METHOD OF PREVENTING CATASTROPHIC FAILURE TO AN INTERNAL COMBUSTION ENGINE - A piston and method is provided that inhibits the potential catastrophic damage to an internal combustion engine, thereby reducing the risk of costly damage to the engine. The piston includes a piston body having an upper combustion surface separated from an internal cooling chamber by a wall. The a pocket extends into the upper combustion surface to a closed bottom surface of the wall. A tubular member is disposed in the pocket. The tubular member extends upwardly from the upper surface. Should a valve head drop from its normal operating position, the valve head impacts the tubular member and forms a blow-by through passage extending from the upper combustion surface into the cooling chamber. | 05-12-2011 |
20110232479 | PISTON WITH A DUCT UNDER A GASKET - The invention relates to a piston having a first face, a second face opposite to the first face, a third face connecting said first and second faces together and presenting a groove, and a sealing gasket housed in said groove. The piston includes a duct constituted by a first segment situated inside the piston and connecting said first face to said groove, by a second segment situated inside the piston and connecting said second face to said groove, and by an intermediate segment connecting together said first and second segments and crossing said groove, the walls of said intermediate segment being formed by the walls of said groove and by said sealing gasket in such a manner that said intermediate segment forms a leaktight tube that opens out solely via the first segment and via the second segment, said intermediate segment presenting at least one obstacle suitable for impeding the flow of fluid that flows along said intermediate segment. | 09-29-2011 |
20120279389 | OIL GALLERY PISTON WITH IMPROVED THERMAL CONDUCTIVITY - A method of making a piston with enhanced thermal conductivity. In one embodiment, the method includes providing a piston with an oil gallery, the piston made of a material; and depositing a layer of a material in the oil gallery, the material having a higher thermal conductivity than a thermal conductivity of the piston material. Another aspect of the invention is a piston having enhanced thermal conductivity. | 11-08-2012 |
20120291626 | PISTON FOR AN AIR SPRING OF A HEAVY-DUTY VEHICLE - A piston for an air spring of a heavy-duty vehicle includes a sidewall and a central hub. The sidewall and the central hub are attached to a first bottom plate of the piston. A top plate is removeably attached to a top portion of the sidewall and a top portion of the central hub. A bottom portion of said central hub includes a second bottom plate that is recessed relative to the first bottom plate for attachment to a piston mounting pedestal that is in turn mounted to a beam of a suspension assembly of the heavy-duty vehicle. | 11-22-2012 |
20130213218 | COOLING DUCT PISTON AND METHOD FOR PRODUCING THE SAME - A cooling duct piston ( | 08-22-2013 |
20150020681 | Stroke Piston for a Stroke Piston Compressor for Generating Compressed Air for a Vehicle - A stroke piston for a stroke piston compressor for generating compressed air for a vehicle, such as a commercial vehicle, includes a piston body with a piston floor, a piston skirt with piston skirt walls and pin hubs for receiving a piston pin, and at least two piston rings, which can be inserted into circumferential ring grooves of the piston body. Ridges of the piston body are provided between each two ring grooves and between the piston floor and the first ring groove arranged closest to the piston floor and the ring groove arranged closest to the piston skirt facing away from the other ring groove or grooves. At least one of the ridges is recessed at least over a partial section of its ridge height, which is measured parallel to the axis of the piston body, with at least one recess relative to the diameter of the piston body. | 01-22-2015 |
20100139479 | VARIABLE COMPRESSION RATIO PISTON WITH RATE-SENSITIVE RESPONSE - A hydraulic variable compression ratio (VCR) piston for use in an internal combustion engine. The piston is a two-part piston, in which a gudgeon pin carrier slides within an outer sleeve. A variable volume upper chamber is formed between the top of the gudgeon pin carrier and the end of the outer sleeve. When the upper chamber fills with oil, its volume increases, and the overall piston geometry is longer. This reduces the piston clearance in the cylinder and increases cylinder pressure. At a given maximum cylinder pressure or at a given rate of increase of cylinder pressure, oil from the upper chamber is relieved by using a rate-sensitive pressure relief valve. | 06-10-2010 |
20130305919 | PRODUCTION OF MULTI-PART, JOINED VALVE COMPONENTS IN HYDRAULIC APPLICATIONS WITH JOINT SEALING PROFILES - The invention relates to a valve component, in particular for a piston or a valve, comprising at least one first disk-shaped joining part and at least one second disk-shaped joining part, wherein the first and second joining part each have at least one opening, and wherein once the joining parts have been joined, the opening in the joining parts interacts in such a way that a channel is formed and a fluid medium can flow through the channel. In first and second regions at the joining parts, an at least partially peripheral elevation and/or depression interact with one another in sealing fashion once joined. | 11-21-2013 |
20140060320 | PISTON FOR AN AIR PUMP - A piston for an air pump has a connecting rod and a sealing valve. The connecting rod has a seat. The seat has a groove and a retaining surface. The groove is defined in an outer surface of the seat. The retaining surface is adjacent to the groove. The sealing valve movably engages the seat of the connecting rod and has an engaging ring and a sealing part. The engaging ring has an inwall which extends into the groove and has an engaging surface facing the retaining surface. The sealing part is connected with the inwall of the engaging ring and sealingly covers the through hole. The sealing valve is not prone to deformation and warpage during the operation of the piston to prevent any operating noise problem. | 03-06-2014 |