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| Number | Title | Issue Date |
| 8176629 | Method for screwing skirt and crown parts of a metal piston together A method for screwing together two metal parts that are spaced apart from one another close to a screw connection element and elastically deformable relative to one another, and for the remainder lie against one another. In order to obtain a firm and secure screw co... | 05/15/2012 |
| 7971355 | Method for attaching a ring element to a piston for an internal combustion engine A method for attaching a ring element to a piston for an internal combustion engine, in which the ring element is screwed onto the piston body by a thread applied to the radially outer surface of a part of the piston crown, a circumferential groove that is open towa... | 07/05/2011 |
| 7721431 | Method of making a piston An engine piston is manufactured by assembling an outer shell, comprising a crown and tubular side wall in which a ring groove region and skirt are defined, with a plate-like mounting member and bonding them together by brazing or welding. The mounting member is loc... | 05/25/2010 |
| 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 |
| 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 |
| 7093529 | Composite piston Devices, piston components, and methods are provided for an improved piston. One embodiment for a piston component includes a base having a side to receive a piston body. A tang is provided to the base and extends outward from the side of the base which is to receiv... | 08/22/2006 |
| 7066132 | Piston with oxidation catalyst Pistons reciprocating in cylinders of a hydrocarbon-fueled internal combustion engine tend to trap air and unburned fuel between the top of the piston head and its enclosing cylinder wall. The circumferential side surface (or land) of the piston head above its upper... | 06/27/2006 |
| 7048098 | Toroidal rotary damper apparatus A toroidal rotary damper apparatus includes a housing having a toroidal inner housing surface and a piston moveable in the housing having a curved outer peripheral piston surface in engagement with the inner housing surface. A fluid barrier is attached to the housin... | 05/23/2006 |
| 7007590 | Device with at least one extension arm or support arm for multi-linked crane shaped extension arms, concrete spreader columns and similar The invention relates to a device with at least one extension arm or support arm for multi-linked crane shaped extension arms, concrete spreader columns and similar, comprising at least one hydraulic differential cylinder for actuating a support arm. The cylinder co... | 03/07/2006 |
| 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 |
| 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 |
| 6789313 | Piston pin lock ring insertion tool and method A piston-pin lock-ring-insertion tool has a ring-insertion tube (1) in ring-insertion relationship to a ring pusher (2). The ring-insertion tube has an inside periphery with a press-close taper (8) that is tapered inwardly from a ring-feeder end... | 09/14/2004 |
| 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 |
| 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 |
| 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 |
| 6530149 | Method for producing hollow piston for compressor by forging A method of producing a hollow piston for a compressor, the piston including a head portion which is slidably fitted in a cylinder bore of the compressor, and an engaging portion which engages a reciprocating drive device of the compressor for reciprocati... | 03/11/2003 |
| 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 |
| 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 |
| 6487773 | Method of making one-piece piston The invention concerns a method of producing a one-part piston which, in the region of the piston ring zone, has a closed cooling duct and a recess between the piston ring zone and the box-shaped piston body. The method comprises the following steps: A pi... | 12/03/2002 |
| 6453554 | Swash plate type compressor piston wherein inner surface of base section of neck portion has as-cast surface area A die-cast piston for a swash plate type compressor including a cylinder block having a cylinder bore, including a generally cylindrical head portion slidably movably received in a cylinder bore formed in a cylinder block of the compressor, and a generall... | 09/24/2002 |
| 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 |
| 6318242 | Filled hydraulic piston and method of making the same The present invention relates to a filled piston assembly for a hydraulic pump or motor. The filled hydraulic piston assembly includes a blank piston body having first and second ends and a cavity or compartment in the piston body extending inwardly from ... | 11/20/2001 |
| 6279455 | 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... | 08/28/2001 |
| 6257121 | Piston with piston rod The piston (1) has a ball receptacle (14) for the rod head (4) of the piston rod (2) of a swash plate compressor. For absorbing particularly high pressures the rod head (4) has a relatively large diameter, so that the ball receptacle (14) extends close to... | 07/10/2001 |
| 6146110 | Swash plate type compressor A swash plate type compressor for refrigerant in a refrigeration cycle of an air conditioning system for an automotive vehicle. The compressor comprises a cylinder block having a plurality of cylinder bores. A plurality of pistons are provided to be respe... | 11/14/2000 |
| 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 |
| 6101713 | Method of calibrating a pre-formed recess A method of calibrating a component having first and second opposite large surfaces and a peripheral surface which interconnects the large surfaces and which is provided with a recess, includes the steps of placing the component in a calibrating die, ther... | 08/15/2000 |
| 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 |
| 5960542 | Method of producing piston for swash plate compressor In order to produce a single headed piston for a swash plate compressor, the following steps are used. First, a shaped block of metal is cast, the block including a plurality of unfinished piston structures which are aligned and integrated, each unfinishe... | 10/05/1999 |
| 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 |
| 5809962 | Method for producing a piston for an internal combustion engine and a piston produced by the method A piston for an internal combustion engine includes an insert defining an air chamber opening into the combustion chamber. The insert is preformed to a desired configuration and the piston cast around the insert thus securing the insert within the structu... | 09/22/1998 |
| 5553378 | Method of manufacturing a piston An improved method of manufacturing a piston is provided. The piston includes a substantially cylindrical member having a first end and a second end. The cylindrical member includes an open cavity extending axially from the second end to adjacent the firs... | 09/10/1996 |
| 5417144 | Power transmission device for linear movements Power transmission device for linear movement, comprising a principal member (2), which is movable along a displacement path, and a housing (1) which presents bearing means (10) for the movement of the member along the displacement path. A guide member (3... | 05/23/1995 |
| 5408916 | Piston having a liner and method for manufacturing same A piston assembly (10) for use in an engine. The piston assembly (10) includes a piston body (12) with a liner (24) covering the interior surface (22) thereof. The liner (24) imbues added strength and dimensional stability during casting, machining, engin... | 04/25/1995 |
| 5359922 | Head of two welded parts for two-piece articulated piston A method to manufacture an articulated piston head wherein the two portions composing the head, i.e. the top portion and the pin boss portion, are formed separately from blanks of forged or cast chromium-molybdenum steel or a low alloy steel, subjected to... | 11/01/1994 |
| 5309818 | Method for the manufacture of a cooled piston A cooled piston head and method of manufacture, the piston head having a closed cooling chamber. In one embodiment, the piston head is formed of a top member, an intermediate member and a pin boss member joined to each other preferably by welding; the top... | 05/10/1994 |
| 5301599 | Pistons with ring groove reinforcing Pistons and a method for their manufacture are described. The piston has at least one piston ring groove reinforcing member being annular in form and having, in cross-section, upper and lower, generally radially extending face portions and a radially inne... | 04/12/1994 |
