With Assembly Or Composite Article Making Patents (Class 29/888.044)
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Patent number: 6871393Abstract: 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-descending means, and elevating/descending for elevating the absorbing angle-maintaining means into the cylinder bores to contact the absorbing angle-maintaining face with a lower end of each of the pistons and for descending the absorbing angle-maintaining means at a rate substantially equal to a descending rate of the assembly-descending means at actuation of the assembly-descending means.Type: GrantFiled: May 21, 2003Date of Patent: March 29, 2005Assignee: Halla Climate Control CorporationInventor: Kiyeon Kim
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Publication number: 20050028364Abstract: The invention relates to a method for producing a piston or piston head with a combustion relief (6) for an internal combustion engine. The aim of the invention is to easily and economically produce pistons having a reduced tendency to scale at the edge of the combustion relief. To this end, the piston is formed from a cylindrical unmachined part (1) made of steel, whereby the rod section has at least one front face (2). The method is characterized by the following steps: A) forming an annulary encircling recess (3) in the front face (2); B) introducing additional material (4) into the recess (3); connecting the additional material (4) to the steel of the unmachined part (1) in an at least partially non-positive manner; C) forging the unmachined part (1), which is formed according to steps A) and B), into a piston blank (5), and; D) machining the piston blank (5) into a piston (10) that is ready to be installed in an internal combustion engine.Type: ApplicationFiled: July 30, 2002Publication date: February 10, 2005Inventor: Wolfgang Issler
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Publication number: 20040194307Abstract: A piston is manufactured with functional recesses (6, 7, 8) thereof formed from property improving material (18b, 18c, 18d). A blank (10) defines a mounting recess (12, 14, 16) and a quantity of said property-improving material (18b, 18c, 18d) is secured within said mounting recess. Said functional recess (6, 7, 8) is machined out of said quantity of property-improving material. The process for securing said property-improving material (18b, 18c, 18d) comprises forming a rod (20, 22, 34) from a material which on plasticisation under heat and pressure forms said property-improving material, inserting an end of the rod into said mounting recess, and rotating said rod in contact with a surface of the mounting recess (12, 14, 16), while applying force to the rod to feed it into the mounting recess.Type: ApplicationFiled: November 24, 2003Publication date: October 7, 2004Inventor: Samantha Isobelle Barnes
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Publication number: 20040194308Abstract: 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 region of the depression edge.Type: ApplicationFiled: December 12, 2003Publication date: October 7, 2004Applicant: Mahle GmbHInventors: Karlheinz Bing, Gerhard Bucher
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Publication number: 20040177503Abstract: A method for the production of a forged piston for an internal combustion engine, having a combustion depression provided on the piston head. The piston is formed from a first cylindrical unmachined part having at least one flat face made of oxidation-resistant steel and a second cylindrical unmachined part having at least one flat face made of hot-forgeable steel, with the same diameters (d), in each instance. The two unmachined parts are formed to produce a piston blank by means of forging, causing the combustion depression to be formed from oxidation-resistant steel. Subsequently the piston blank is finished via machining to produce a piston ready for installation in the internal combustion engine.Type: ApplicationFiled: December 12, 2003Publication date: September 16, 2004Applicant: Mahle GmbHInventors: Karlheinz Bing, Gerhard Bucher
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Publication number: 20040177504Abstract: A method for the production of a forged piston for an internal combustion engine, having a combustion depression provided on the piston head. The piston is formed from a first tube-shaped unmachined part made of oxidation-resistant steel, having at least one join surface, and a second cylindrical unmachined part made of hot-forgeable steel, having at least one join surface. The join surface of the first unmachined part is shrunk onto the join surface of the second unmachined part. The two unmachined parts are formed to produce a piston blank, by means of forging, causing at least the combustion depression to be formed from oxidation-resistant steel. Subsequently the piston blank is finished via machining to produce a piston ready for installation in the internal combustion engine. Simplified and cost-effective production of a piston having a reduced tendency to oxidize at the edge of the depression, and improved protection against wear caused by erosion is achieved.Type: ApplicationFiled: December 12, 2003Publication date: September 16, 2004Applicant: Mahle GmbHInventors: Karlheinz Bing, Gerhard Bucher
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Publication number: 20040177505Abstract: A method for the production of a forged piston for an internal combustion engine, having a combustion depression provided on the piston head. The piston is formed from a first cylindrical unmachined part having at least one flat face made of oxidation-resistant steel and a second cylindrical unmachined part having at least one flat face made of hot-forgeable steel, with the same diameters. The two unmachined parts are formed to produce a piston blank, by means of forging, causing the combustion depression to be formed from oxidation-resistant steel. The piston blank is subsequently finished via machining to produce a piston ready for installation in the internal combustion engine.Type: ApplicationFiled: December 12, 2003Publication date: September 16, 2004Applicant: Mahle GmbHInventors: Karlheinz Bing, Gerhard Bucher
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Patent number: 6779660Abstract: 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 rings preinstalled on a piston member and a sleeve position about the piston member and the plurality of rings maintaining the rings in a compressed position ready for installation into an engine. The piston assembly is lowered into a cylinder bore, the sleeve contacts the top surface of a block and the piston assembly can be easily installed into the cylinder bore without the need for the mechanic to compress the plurality of rings. Thus the present invention reduces time and expense required for rebuilding and engine and increases the quality of the rebuild.Type: GrantFiled: September 21, 2001Date of Patent: August 24, 2004Assignee: Caterpillar IncInventors: Kenneth D. Calvert, Edward R. Gillis, Kevin M. Scott, Houston Weaver, Jr., Michael D. Wesner
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Publication number: 20040040151Abstract: 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 groove and secured there until the overall dashpot is assembled. The groove is accordingly higher at its outer circumference and its inner circumference (12) is deformed, compressing the rim (8) in place.Type: ApplicationFiled: September 2, 2003Publication date: March 4, 2004Applicant: Krupp Bilistein GmbHInventors: Adolf Adrian, Andreas Nevoight
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Patent number: 6687993Abstract: 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 or clamp, onto the head surface of the engine cylinder. The connected rod-pin-piston assembly is then inserted into the engine cylinder being thrust by an actuator passing through the gripper or clamp.Type: GrantFiled: June 19, 2001Date of Patent: February 10, 2004Assignee: RenaultInventors: David Bertin, Emmanuelle Bischoffe
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Patent number: 6668452Abstract: 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 groove and secured there until the overall dashpot is assembled. The groove is accordingly higher at its outer circumference and its inner circumference (12) is deformed, compressing the rim (8) in place.Type: GrantFiled: June 18, 2002Date of Patent: December 30, 2003Assignee: Krupp Bilstein GmbHInventors: Adolf Adrian, Andreas Nevoigt
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Patent number: 6662709Abstract: 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) that delimits the annular cavity (9) on the outside, and a mandrel (7) that delimits the annular cavity (9) on the inside extend, each as one piece, in the other axial direction. The hollow piston is also constituted of a second piston part (1b) having a cover (8) which is connected to the ends of the peripheral wall (6) and of the mandrel (7), said ends facing away from the base section (3). In order to achieve an economical and simple production while ensuring the provision of a stabile construction, the peripheral wall (6) and the mandrel (7) are formed on the base section (3) without machining.Type: GrantFiled: January 4, 2002Date of Patent: December 16, 2003Assignee: Brueninghaus Hydromatik GmbHInventor: Gerhard Beutler
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Patent number: 6658713Abstract: 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 adapted to engage a piston in position for insertion; a positioner for positioning the support arm in an insertion position with the rod end engaging a piston; and a control for actuating the insertion rod to insert a piston/rod assembly into the cylinder. Various additional features of an exemplary embodiment are also disclosed.Type: GrantFiled: October 29, 2002Date of Patent: December 9, 2003Assignee: General Motors CorporationInventors: John W. Wittum, Christopher W. Zwolensky, Gary C. Spence
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Patent number: 6604284Abstract: 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 a body part and cup parts is accommodated in a housing recess 50 of a cassette jig 48 and are conveyed. When the cassette jig 48 is positioned just under a welding chamber 45, the housing recess 50 communicates with the welding chamber 45 and is isolated from the outside air by a sealing material 53. The pressure in the welding chamber 45 is reduced to nearly a vacuum by an exhaust pump 46, and electron beam welding is applied to the coupling portion 67 of the piston assembly 51 in a near vacuum atmosphere. After the electron beam welding, a hollow space 68 in the piston assembly is sealed hermetically and contains a near vacuum atmosphere.Type: GrantFiled: November 15, 2000Date of Patent: August 12, 2003Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Takayuki Kato, Takahiro Sugioka
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Patent number: 6555777Abstract: 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 the second end of the stem. To manufacture female bimetal slippers the method includes forming a slipper body of a first material, the body having opposite first and second ends, the first end having a ball socket formed therein; and capacitance discharge welding a wear pad of a second material to the second end of the body.Type: GrantFiled: January 11, 2002Date of Patent: April 29, 2003Assignee: Sauer-Danfoss Inc.Inventor: Robert J. Stoppek
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Patent number: 6543672Abstract: 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, a disk, a spring and an upper housing on a lower housing, caulking the periphery of the lower housing to the periphery of the upper housing, and then soldering the junction of the upper and lower housings. The assembled power element is placed in a vacuum container, and a small hole formed in the upper housing is subjected to spot welding in the vacuum atmosphere, whereby the small hole is sealed by a weld metal.Type: GrantFiled: June 4, 2001Date of Patent: April 8, 2003Assignee: TGK Co., Ltd.Inventors: Hisatoshi Hirota, Shiniji Saeki, Kouji Habu
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Patent number: 6532655Abstract: 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 the cap prior to simply welding the body and the cap together into a single structure through a frictional welding process. This method thus remarkably simplifies the pre-welding machining process. In the frictional welding process, the body and the cap are welded together into a single structure by simply and relatively rotating the body and the cap while forcing them toward each other under atmospheric air at room temperature. The frictional welding process is thus accomplished using a simple welding machine, thereby reducing the equipment cost while producing the hollow pistons. The frictional welding process is also free from oxidizing the welded portions of a resulting hollow piston, and so the resulting piston does not have micro pores in its structure.Type: GrantFiled: December 17, 1999Date of Patent: March 18, 2003Assignee: Halla Climate Control Corp.Inventors: Hew Nam Ahn, Young Seop Yoon
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Patent number: 6507999Abstract: 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 forging is conducted under at least one of super-plasticity and hot deformation conditions; and heat treating the forged billet. The forging comprises forging at a temperature in a range from about 0.8 Tmelt to about 0.98 Tmelt. The forging also comprises forging at a STRAIN rate in a range from about 5×10−2 s−1 to about 5×10−5 s−1. The piston being formed with a configuration that enables other as parts to be connected to the piston. The initial billet comprises at least one of: coarse grain silicon, intermetallic particles, and injected hardening particles having at least one of a lamellar, comprehensive shape, and fine grain silicon, intermetallic particles, and injected hardening particles being globular in shape.Type: GrantFiled: August 30, 2001Date of Patent: January 21, 2003Assignee: General Electric CompanyInventors: Oscar Akramovich Kaibyshev, Vadim Gennadievich Trifonov
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Patent number: 6495267Abstract: 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 surface, at least a portion of which has a base layer of magnesium fluoride, magnesium oxofluoride, magnesium oxide or a mixture thereof electrochemically anodized thereto.Type: GrantFiled: October 4, 2001Date of Patent: December 17, 2002Assignee: Briggs & Stratton CorporationInventor: Jerry L. Schenkel
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Patent number: 6467155Abstract: 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 into the cylinder of the engine block. The transfer control system has a proximity sensor and a first control system in communication with the proximity sensor. A second control system is in communication with the first control system.Type: GrantFiled: June 29, 2000Date of Patent: October 22, 2002Assignee: Caterpillar IncInventors: James A. Cook, Brad A. Moore, Kevin R. Shaffer, James L. Thien, Robert L. Walters
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Patent number: 6453555Abstract: 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 that an amount of gas included in the material of the head portion is not more than 5 cc per 100 g of the material, closing, with a closure member, the open end of the head portion, and welding the head portion and the closure member to each other by emitting, a plurality of times, a welding beam toward each of a multiplicity of spots on a welding line along which the head portion and the closure member contact each other.Type: GrantFiled: September 20, 2000Date of Patent: September 24, 2002Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Takayuki Kato, Seiji Katayama
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Publication number: 20020112349Abstract: A way to securing screws in assembled pistons, in which the piston crown is joined with a bottom part of the piston by means of tension screws. The screws are secured via an adhesive comprising a mixture of a two-component resin and a solid lubricant or lubricating paste applied to the screw threads or to the contact surface of the screw thread.Type: ApplicationFiled: February 12, 2002Publication date: August 22, 2002Applicant: MAHLE GmbHInventor: Roland Lochmann
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Patent number: 6428909Abstract: 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-silicon alloy by casting, eutectic silicon grains are exposed from at least part of an exposed plane of the aluminum alloy member. A coating layer having a thickness nearly equal to or thinner than a diameter of each of the eutectic silicon grains is formed on the exposed plane from which the eutectic silicon grains are exposed.Type: GrantFiled: February 9, 2001Date of Patent: August 6, 2002Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Hiroyuki Oketani, Hiroyuki Uchida, Shigeyuki Hara, Yuji Marui
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Patent number: 6419459Abstract: 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 direct thread engagement of the connector internally of the cylinder block. The invention eliminates the requirement of machining a fluid cylinder block to provide engageable flanges and form nut pockets, thereby minimizing fabrication time and costs, while increasing strength, stability and alignment accuracy between pump pony rods and plunger assemblies of fluid cylinders generally of the type used for high pressure industrial applications.Type: GrantFiled: October 2, 2000Date of Patent: July 16, 2002Assignee: Gardner Denver, Inc.Inventor: Ronald Norbert Sibbing
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Patent number: 6381842Abstract: 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 having an open end at at least one of its opposite ends, and a closure member closing the open end of the body member, one of the body and closure members having an annular shoulder surface and a circumferential surface which is adjacent to the shoulder surface, the shoulder and circumferential surfaces defining a female corner portion, the other member having a male corner portion corresponding to the female corner portion; and fixing the body and closure members together for engagement of the male and female corner portions, and wherein the step of forming the body and closure members comprises at least one of (a) a step of forming an annular groove at a position of one of the shoulder and circumferential surfaces of the female corner portion, the positionType: GrantFiled: February 13, 2001Date of Patent: May 7, 2002Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Takayuki Kato, Masato Takamatsu, Takahiro Hoshida, Fuminobu Enokijima
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Patent number: 6367141Abstract: 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 into the cylinder aligns the piston assembly with the cylinder and inserts the piston assembly into the cylinder by pivoting the piston assembly from an upright position to a horizontal position, and inserting the piston assembly into the cylinder of the engine block.Type: GrantFiled: June 29, 2000Date of Patent: April 9, 2002Assignee: Caterpillar Inc.Inventors: James A. Cook, Brad A. Moore, Kevin R. Shaffer, James L. Thien, Robert L. Walters
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Patent number: 6318551Abstract: 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 rings preinstalled on a piston member and a sleeve position about the piston member and the plurality of rings maintaining the rings in a compressed position ready for installation into an engine. The piston assembly is lowered into a cylinder bore, the sleeve contacts the top surface of a block and the piston assembly can be easily installed into the cylinder bore without the need for the mechanic to compress the plurality of rings. Thus the present invention reduces time and expense required for rebuilding and engine and increases the quality of the rebuild.Type: GrantFiled: November 10, 1999Date of Patent: November 20, 2001Assignee: Caterpillar Inc.Inventors: Kenneth D. Calvert, Weaver Houston, Jr., Michael D. Wesner
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Patent number: 6266878Abstract: 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 working a blank of metallic material along a first axis between opposing members of a die assembly. With the die assembly still closed after formation of the actuator arms, a pair of hollow piston bodies are formed by extruding the remainder of the blank of metallic material along a second axis. The hollow piston bodies are axially aligned and integrally formed with respective ones of the actuator arms. A piston head is welded to the end of each hollow piston body which is then machined. By separating the actuator arms from one another, a pair of variable displacement compressor pistons having hollow piston bodies axially aligned and integrally formed with respective actuator arms are thus formed.Type: GrantFiled: February 2, 1999Date of Patent: July 31, 2001Assignee: Amcast Industrial CorporationInventors: Robert John Durkin, Steven Lee Worthington