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| Number | Title | Issue Date |
| 8104174 | Method for producing a piston The invention relates to a piston for a piston-cylinder arrangement, particularly a shock absorber piston, which includes a piston body, that has a circumferential surface. A sealing collar has an outer circumferential surface, an inner circumferential surface, a fi... | 01/31/2012 |
| 7559141 | Torsional vibration damper In order to adapt the damping behavior at a wider range in a process for damping torsional vibrations and in a torsional vibration damper, the length of an elastic element can be changed in dependence on a relative angle between two rotational subassemblies, with th... | 07/14/2009 |
| 7213337 | Method of manufacturing pistons and components thereof, and forging tools A method of manufacturing an entire piston, piston heads for example, especially intended for internal-combustion engines, wherein in an initial manufacturing step a blank that will eventually constitute the piston is preliminarily forged along a prescribed axis, sh... | 05/08/2007 |
| 7182909 | Forging quench Apparatus and methods are provided for cooling workpieces. A cooling gas is directed toward a surface of a workpiece. The cooling gas includes at least a first component that is gaseous at a reference ambient condition and a second component that is a liquid at the ... | 02/27/2007 |
| 7178237 | Piston for a piston-cylinder arrangement, in particular a shock absorber piston The invention relates to a piston for a piston-cylinder arrangement, especially a shock absorber piston, comprising a piston body that is fitted with at least one peripheral web on its peripheral surface, wherein a collar-shaped sealing element made of thermoformabl... | 02/20/2007 |
| 7146724 | Method of Assembling an internal combustion engine This invention provides a method of assembling a modular internal combustion engine. The modular engine includes a cast crankcase having an open top and a closed bottom, a mid-plate, and an extruded cylinder bore block. A pre-assembled crankshaft with bearings, conn... | 12/12/2006 |
| 7137197 | Method of manufacturing a piston having a hollow piston head A method of manufacturing a piston using a swaging tool includes the step of positioning a portion of a first member and a portion of a second member of the piston within a first end of an opening formed through the swaging tool, such that a reduced diameter portion... | 11/21/2006 |
| 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 |
| 7069881 | Cooled ring carrier for a piston The invention relates to a cooled ring carrier that is cast into a piston for internal combustion engines. According to the invention, the zone of the ring carrier facing the cooling channel is coated, thereby preventing air from escaping from the cooling channel th... | 07/04/2006 |
| 7051645 | Piston for an engine A piston for use in an engine. The piston includes a piston head having at least one ring groove. The piston also includes a piston skirt coated with a first thickness of a bronze coating material, and a side panel adjacent the piston skirt that is coated with a sec... | 05/30/2006 |
| 7043835 | Method for centering a workpiece on the cylindrical axis of a bore A method and system for precisely centering a workpiece within a cylindrical bore such that the center of the workpiece is coaxial with the central axis of the bore. An arbor is used within the cylindrical bore to sense and calculate the location of the central axis... | 05/16/2006 |
| 7003952 | Master cylinder and method of producing the same A master cylinder has a cylinder member in the shape of a cylinder, one end of which is closed, and a piston inserted in the cylinder member to form a pressure chamber in the cylinder member. The cylinder member is formed with a port for providing communication betw... | 02/28/2006 |
| 7000526 | Hydraulic piston made from rolled sheet metal, method for its manufacture and intermediate product of the method The invention relates to a cup-shaped hydraulic piston (10) made from rolled sheet metal, which comprises an open end (12), a side wall (16) with a cylindrical outer surface (18) and an inner surface (22), as well as a piston head ... | 02/21/2006 |
| 6973723 | Piston formed by powder metallurgical methods A piston includes a piston structure being unitarily formed in a powder metallurgy process, the piston structure having a crown assembly and a skirt assembly, at least a partial combustion chamber being formed intersecting a piston crown surface during the powder me... | 12/13/2005 |
| 6938603 | Method for the production of a one-piece piston for an internal combustion engine A method for the production of a one piece piston for an internal combustion engine. The piston has a ring shaped cooling channel arranged in an outer region of a piston head. The channel is partially closed off by a circumferential projection structured as an oil g... | 09/06/2005 |
| 6871393 | Apparatus for assembling piston in swash plate type compressor A piston assembling apparatus for a swash plate type compressor has a cylinder block-fixing means; vacuum absorbing means; absorbing angle-maintaining means capable of entering the cylinder bores from under the cylinder block and leaving out of the same; assembly-de... | 03/29/2005 |
| 6779660 | Method and apparatus for installing a prepackaged piston assembly in an engine This invention relates generally to a piston assembly and more specifically to a piston assembly in a prepackaged configuration. The prepackaged piston assembly is ready for immediate installation into an engine or compressor. The piston assembly has a plurality of ... | 08/24/2004 |
| 6687993 | Method for fitting a cylinder assembly into a cylinder housing A method for fitting a cylinder assembly into an internal combustion cylinder housing includes the steps of gripping the connected rod-pin-piston assembly with a gripper or clamp and lowering the connected rod-pin-piston assembly, gripped by the gripper o... | 02/10/2004 |
| 6668452 | Piston-rod scraping ring accommodated in a groove in a dashpot cap, and method of inserting such a ring in such a groove A piston-rod scraping ring (7) of elastic material accommodated in an inward opening groove (9) in a dashpot cap (2) and especially intended to scrape water and dirt off a piston rod (1). The object is to allow the ring to be easily inserted into the groo... | 12/30/2003 |
| 6662709 | Hollow piston for a piston engine and method for producing a hollow piston A hollow piston (1) piston engine including a closed annular cavity (9). Said hollow piston constituted of a first piston part (1a) with a base section (3) from which a joint part (4) extends in one axial direction, and from which a peripheral wall (6) th... | 12/16/2003 |
| 6658713 | Semi-automatic engine piston assembly tool An assembly tool for insertion of engine piston/rod assemblies into an engine cylinder includes a frame, a support arm pivotally carried on the frame, an insertion cylinder carried by the support arm and including an extendable insertion rod having an end... | 12/09/2003 |
| 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 |
| 6555777 | Method of manufacturing bimetal slippers A method of manufacturing male bimetal slippers includes the steps of forming a stem having opposite first and second ends; rigidly affixing a ball on the first end of the stem to form a male slipper body; and capacitance discharge welding a wear pad to t... | 04/29/2003 |
| 6543672 | Method of forming vacuum chamber of control valve for variable capacity compressor A vacuum chamber-forming method for forming a vacuum chamber in a power element of a control valve for a variable capacity compressor through a reduced number of steps. A power element is assembled in the atmospheric air by arranging a disk, a diaphragm, ... | 04/08/2003 |
| 6532655 | Method of manufacturing hollow piston for compressors A method of manufacturing a hollow piston for variable displacement swash plate compressors of air conditioning systems is disclosed. This method produces a desired hollow piston by separately forming a body and a cap and by simply machining the body and ... | 03/18/2003 |
| 6507999 | Method of manufacturing internal combustion engine pistons A piston production method produces an internal combustion engine piston. The method comprises forging a billet from an initial billet comprising an aluminum alloy that comprises silicon, intermetallic particles, and injected hardening particles, the forg... | 01/21/2003 |
| 6495267 | Anodized magnesium or magnesium alloy piston and method for manufacturing the same An anodized magnesium piston including a head and skirt for an internal combustion engine. The piston includes a non-fiber-reinforced, magnesium-based alloy including up to 2.5 percent by weight rare earth metals. The piston further includes an external s... | 12/17/2002 |
| 6467155 | Transfer control system for piston insertion machine A transfer control system for enabling technicians to insert a piston assembly into a cylinder of an engine block. The transfer control system ensures that only one technician at a single time is capable of controlling the insertion of the piston assembly... | 10/22/2002 |
| 6453555 | Method of producing compressor piston A method of producing a piston for a compressor, including the steps of casting a molten material into a die to form a hollow cylindrical head portion of the piston that is open at one of opposite ends thereof and is closed at the other end thereof, such ... | 09/24/2002 |
| 6428909 | Aluminum alloy member and production method thereof To provide an aluminum alloy member having a high machinability while keeping a sufficient mechanical strength and a sufficient wear resistance, and a method of producing the aluminum alloy member. In an aluminum alloy member formed from an aluminum-silic... | 08/06/2002 |
| 6419459 | Pump fluid cylinder mounting assembly A mounting assembly for mounting a pump to a fluid cylinder comprising a tie rod threaded at one end and providing a second end drivingly engageable with a sleeve-like threaded connection for clamping attachment directly into the cylinder block by the dir... | 07/16/2002 |
| 6381842 | Method of producing swash plate type compressor piston A method of producing a hollow piston for a compressor including a head and an engaging portion for engaging a piston reciprocating drive device, at least the head portion being hollow, the method comprising the steps of: forming a cylindrical body member... | 05/07/2002 |
| 6367141 | Method of inserting a piston assembly into a cylinder of an internal combustion engine A method of inserting a piston assembly into a cylinder of an engine block. The method eliminates the need for a technician to individually lift and insert the piston assemblies into the respective cylinders. The method for inserting the piston assembly i... | 04/09/2002 |
| 6318551 | Method and apparatus for installing a prepackaged piston assembly in an engine This invention relates generally to a piston assembly and more specifically to a piston assembly in a prepackaged configuration. The prepackaged piston assembly is ready for immediate installation into an engine or compressor. The piston assembly has a pl... | 11/20/2001 |
| 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 |
| 6112642 | Method and apparatus for making a two piece unitary piston Past pistons have been susceptible to reduced longevity due to increased forces of combustion thereon during operating cycles of an engine. The present two piece unitary piston increases the longevity of pistons used with increased forces of combustion. F... | 09/05/2000 |
| 5992015 | Process for forming composite piston In a method of manufacturing the piston, a first block including first alloy and a second block including a second alloy are press-forged to form a piston. The piston has a head and a skirt, with the head including at least a portion of the first alloy an... | 11/30/1999 |
| 5992016 | Method of controlling the magnetic gap length and the initial stroke length of a pressure surge fuel pump A method of partially fabricating a precisely dimensioned fuel pump wherein selected pump elements are partially assembled before those elements are machined. After machining, the partially assembled elements exhibit enhanced concentricity.... | 11/30/1999 |
| 5913960 | Pistons A method is described of making a piston crown, the method comprises the steps of making a lower crown portion, the lower crown portion also having piston pin bosses, making an upper crown portion which co-operates with the lower crown portion and joining... | 06/22/1999 |
| 5758985 | Apparatus and method for fixing a piston to a piston rod Apparatus and method for joining a piston in a precise leak proof junction on a rod utilizes an axial longitudinally elongated reservoir (A) in a bore within the piston which serves as a receptacle for a bonding agent (B), an annular groove (C) in the pis... | 06/02/1998 |
