Cylinder Detail Patents (Class 92/169.1)
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Publication number: 20120304851Abstract: A new system of hydraulic and piston cylinders for the lifting of large loads manufactured based on commercial tubes, in which the cylinder tube (1), closed on its lower part possesses a welded and rigid washer (2) on its lower part and inside the aforementioned cylinder. The piston has another rigid washer welded to it (4) at a certain distance from the lower end and on its outer surface. Between the two there is an O-Ring seal (6) of variable geometry that is constructed with an elastomeric, compressable and deformable material of low friction and high elasticity and a free washer. The compression of the O-Ring seal makes up a system that closes, guaranteeing its watertightness.Type: ApplicationFiled: December 10, 2010Publication date: December 6, 2012Applicant: GRUPO DE INGENIERIA OCEANICA, S.L.Inventor: Cesar del Campo y Ruiz de Almodovar
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Publication number: 20120247322Abstract: A method of remanufacturing a cylinder assembly that has a shaft body and a slidable cylinder assembly extending thereover. A plurality of seals extend between the shaft body and the slidable cylinder to provide a plurality of fluid-tight chambers. The shaft body has opposing ends with a first end cap positioned at a first end and a second end cap positioned at a second end thereof. The shaft body is permanently coupled to the end caps to preclude removal thereof. The method requires cutting the shaft body to remove the end caps, and subsequent reattachment.Type: ApplicationFiled: April 2, 2012Publication date: October 4, 2012Inventor: Zbigniew Robert Paul
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Publication number: 20120247321Abstract: A piston compressor with one or more pistons (10). The at least piston (10) is a multi-part piston including at least one first part (12) and a second part (14). The first and second parts are manufactured of different materials.Type: ApplicationFiled: March 26, 2012Publication date: October 4, 2012Applicant: J.P. SAUER & SOHN MASCHINENBAU GMBHInventors: Peter MISSFELDT, Peter DAHMS, Wolfgang WIEGERS
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Patent number: 8277653Abstract: A power recovery chamber is used for a positive-displacement power recovery apparatus in the seawater desalination plant or system. The power recovery chamber includes a cylinder, a piston disposed in the cylinder and capable of being reciprocated in a longitudinal direction of the cylinder, and a piston guide disposed in the cylinder and extending in the longitudinal direction of the cylinder for guiding the piston when the piston is reciprocated in the longitudinal direction of the cylinder. At least a part of an outer circumferential surface of the piston is out of contact with an inner surface of the cylinder, and the piston is brought into contact with the piston guide at a part where the piston guide passes through the piston.Type: GrantFiled: March 31, 2009Date of Patent: October 2, 2012Assignee: Ebara CorporationInventors: Masao Shinoda, Kenichi Hoshino, Akira Goto, Hideki Kanno
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Patent number: 8272316Abstract: A piston-chamber combination comprising an elongate chamber which is bounded by an inner chamber wall, and comprising a piston means in said chamber to be sealingly movable relative to said chamber wall at least between a first and a second longitudinal position of the chamber, said chamber having cross-sections of different cross-sectional areas at the first and second longitudinal positions, and at least substantially continuously differing cross-sectional areas at intermediate longitudinal positions between the first and second longitudinal positions, the cross-sectional area at said second longitudinal position being smaller than the cross-sectional area at said first longitudinal position, said piston means can change dimensions thereby providing for different cross-sectional areas of the piston means adapting the same to said different cross-sectional areas of the chamber during the relative movements of the piston means between the first and second longitudinal positions through said intermediate longiType: GrantFiled: June 7, 2007Date of Patent: September 25, 2012Assignee: NVB International UK Ltd.Inventor: Nicolaas van der Blom
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Publication number: 20120207629Abstract: An air compressor that can take in air at a particular pressure at the input and compress the air such that it exits an output at a much greater pressure until a desired pressure is reached in a piston assembly, at which point, the air compressor can shut off automatically by moving a switch. A tank does not need to be part of the compressor assembly, and thus, the air compressor is capable of determining the pressure and shutting off at the desired pressure regardless of the particular tank that is removeably connected to the air compressor. The switch can be moved to an off position by an arm pivotally connected to a carriage. In addition, the air compressor can utilize a piston assembly having a plurality of stationary o-rings for receiving a piston.Type: ApplicationFiled: December 13, 2011Publication date: August 16, 2012Inventor: Thomas Kotsiopoulos
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Publication number: 20120200020Abstract: An end member for a gas spring assembly includes an end member wall with a first wall portion at least partially defining a substantially-flat surface area in a first plane, a second wall portion at least partially defining an outer peripheral extent of the end member wall and a third wall portion at least partially defining a substantially-flat surface area in a second plane. A valley can extend lengthwise along the third wall portion. A gas spring assembly and method of assembly are also included.Type: ApplicationFiled: October 14, 2009Publication date: August 9, 2012Applicant: FIRESTONE INDUSTRIAL PRODUCTS COMPANY, LLCInventors: Leonardus J. B. Peeters, Machiel G. A. Wentink, Daniel I. Levy, Daniel P. Steele
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Patent number: 8206137Abstract: There is provided a cylinder apparatus consisting of a cylinder, a piston performing reciprocating motion between a top dead point and a bottom dead point with oscillatory movement in the cylinder, wherein the cylinder has an oscillatory distance between the top dead point and the bottom dead point, which is shorter than the oscillatory distance at the top and bottom dead points.Type: GrantFiled: December 1, 2008Date of Patent: June 26, 2012Assignee: Hitachi, Ltd.Inventors: Susumu Sakamoto, Daisuke Takahashi, Junichi Nagasawa
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Publication number: 20120152112Abstract: A cylinder body includes a cylinder hole and a discharge flow passage. The cylinder hole receives a plunger and forms a pressurizing chamber in one axial end portion thereof. The discharge flow passage is connected to the pressurizing chamber and is adapted to guide and discharge the pressurized fuel from the pressurizing chamber to an outside of the housing. A connection opening of the discharge flow passage is formed in a hole wall of the cylinder hole. A pressure is applied to a predetermined prestressing subject area in the hole wall of the cylinder hole and a passage wall of the discharge flow passage through autofrettage to generate a residual compression stress in the predetermined prestressing subject area and thereby to form a prestressed area of a final product. The prestressing subject area includes an inner peripheral edge of the connection opening.Type: ApplicationFiled: November 16, 2011Publication date: June 21, 2012Applicant: DENSO CORPORATIONInventors: Tetsuya YOSHIMURA, Katsumi Mori, Kenichi Niinuma
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Publication number: 20120137875Abstract: A pneumatic motor of the present invention includes a cylinder assembly and a rotor. The cylinder assembly defines a chamber for receiving the rotor, two air passages, and one or several apertures. The air passages are prepared for pressurized air to be input for driving the rotor to rotate in two different rotation conditions. The cylinder assembly has an adjustment mechanism for blocking all of the apertures. Thus, once air is input via one of the air passages, the air has to be released from the other air passage. Therefore, a specific power stage is provided with the pneumatic motor.Type: ApplicationFiled: February 9, 2012Publication date: June 7, 2012Inventors: Tien LIN, Yen-Che Chiang
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Publication number: 20120090461Abstract: There is provided a compressor including a hermetic container storing therein a lubricant, an electric element, and a compression element driven by the electric element, the compression element including a crankshaft, a bearing portion, a cylinder block, a piston, and a joining portion, wherein a cylinder head is tightened and fixed together with a valve component by a bolt to an opening surface side of a compression chamber formed by a cylinder bore and the piston, and a screw hole portion formed in the opening surface side, for fixing the bolt includes a counterbore extending to the vicinity of a boundary between the cylindrical portion and the tapered portion.Type: ApplicationFiled: September 15, 2011Publication date: April 19, 2012Applicant: Panasonic CorporationInventor: Ichiro KITA
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Publication number: 20120090570Abstract: A method for machining, in particular mechanical machining, of at least one exhaust-gas-conducting surface region of an internal combustion engine or crankcase part, in particular at least one cylinder barrel of a crankcase or at least one cylinder barrel of a cylinder sleeve, includes using a surface-condition-changing machining tool. The surface region is produced from a corrodible material and is brought into contact, during the machining through the use of the surface-condition-changing machining tool, with at least one tribochemically activatable substance being activated during the machining in particular as a function of a defined contact pressure of the machining tool and/or as a function of a defined machining temperature, and forms a corrosion-resistant surface as a triboreaction layer with the respective surface region, by tribochemical reaction. A crankcase and a cylinder sleeve formed in this way are also provided.Type: ApplicationFiled: October 14, 2011Publication date: April 19, 2012Applicant: MAN TRUCK & BUS AGInventor: PETER SCHARF
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Publication number: 20120090462Abstract: A steel piston ring and a steel cylinder liner are described which comprise as the main body a steel composition which has good nitridability. The steel composition consists of the following elements: 0-0.5 weight % B, 0.5-1.2 weight % C, 4.0-20.0 weight % Cr, 0-2.0 weight % Cu, 45.30-91.25 weight % Fe, 0.1-3.0 weight % Mn, 0.1-3.0 weight % Mo, 0-0.05 weight % Nb, 2.0-12.0 weight % Ni, 0-0.1 weight % P, 0-0.05 weight % Pb, 0-0.05 weight % S, 2.0-10.0 weight % Si, 0-0.05 weight % Sn, 0.05-2.0 weight % V, 0-0.2 weight % Ti and 0-0.5 weight % W. The steel piston ring and the steel cylinder liner can be manufactured in a casting process using the machinery and technology employed for the manufacture of cast iron parts.Type: ApplicationFiled: March 25, 2010Publication date: April 19, 2012Applicant: FEDERAL-MOGUL BURSCHEID GMBHInventor: Laszlo Pelsoeczy
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Patent number: 8156856Abstract: A hydraulic cylinder includes a cylinder having a shaft hole, a piston inserted into the shaft hole so as to have clearance with respect to an inner circumferential surface of the shaft hole, and seal members arranged in annular grooves formed in an inner circumference of the shaft hole to seal an annular gap between the inner circumference of the shaft hole and the piston, wherein in the hydraulic cylinder in which cavitation could occur in a portion of the clearance accompanying motion of the piston, an expansion part obtained by expanding a portion of a sidewall surface of the annular grooves on an inner circumferential edge side outward from an arrangement area of the seal members is provided to make a distance from a location where cavitation occurs to the seal members longer by a space formed by the expansion part.Type: GrantFiled: January 7, 2009Date of Patent: April 17, 2012Assignee: NOK CorporationInventor: Yoshiyuki Abe
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Patent number: 8151690Abstract: A method of installing annular seals on a plunger. A first step involves positioning an annular seal on a seal installation tool adapted to hold the annular seal in an expanded state. A second step involves positioning the annular seal so that the annular seal overlies a body of a plunger. A third step involves transferring the annular seal from the seal installation tool to a seal groove in the body of the plunger.Type: GrantFiled: July 15, 2008Date of Patent: April 10, 2012Assignee: Fourth Dimension Designs Ltd.Inventor: Murray R. Townsend
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Publication number: 20120031762Abstract: Bubbles can be removed regardless of an individual difference of a pump to fill an electrophoresis medium into a capillary. Of flow passages formed between an inner side surface of a container for accommodating the electrophoresis medium and a side surface of a plunger, one of the flow passages causing an electrophoresis medium to be easily stagnant is formed to have the cross-sectional area larger than the cross-sectional area of the other flow passage on the opposite side. In other words, the flow passage portion causing the electrophoresis medium to be easily stagnant is formed in such a manner as to increase a flow amount of the electrophoresis medium. This can eliminate a region having an extremely small amount of electrophoresis medium flow in the pump.Type: ApplicationFiled: April 6, 2010Publication date: February 9, 2012Inventors: Takashi Gomi, Ryoji Inaba, Taro Nakazawa, Takeshi Ohura, Mari Kotoura
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Patent number: 8109199Abstract: A reciprocating compressor comprises: a cylinder having an oil pocket on an inner circumferential surface of a piston insertion hole for inserting a piston with a predetermined width and depth; and a piston having a bearing portion protruding so as to slidably contact an inner circumferential surface of the piston insertion hole, and inserted into the piston insertion hole of the cylinder, wherein the bearing portion is formed to have a length shorter than that of the oil pocket of the cylinder. Accordingly, a frictional loss between the cylinder and the piston is reduced.Type: GrantFiled: July 23, 2008Date of Patent: February 7, 2012Assignee: LG Electronics Inc.Inventors: Sung-Gi Kim, Dong-Han Kim
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Publication number: 20120024647Abstract: The present invention provides a cylinder apparatus processing method capable of preventing a base shell from bending which otherwise would be caused due to a residual stress generated when the base shell is processed. The cylinder apparatus processing method comprises securely holding an outer diameter of the base shell 1 with a mandrel 5 inserted therethrough with use of a holder die 4, and forming a recess 2 on the base shell 1 by locally applying crush processing (cold working) to an upper position of the base shell 1 with use of a press die 6 and concurrently forming an impression 21 of a bend prevention die 7 at a lower position of the outer diameter of the base shell 1 by a reactive force R to a processing force F applied by the press die 6 and received by the bend prevention die 7.Type: ApplicationFiled: September 23, 2010Publication date: February 2, 2012Inventor: Makoto NISHIMURA
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Publication number: 20120017718Abstract: A robotic musculo-skeletal jointed structure comprising: (a) first and second joint parts coupled together for relative angular movement about a hinge axis there between; (b) an air muscle; (c) spaced first and second attachment sites, being sites respectively located at said joint first and second parts, and about which the tubular braiding, at least, of said air muscle extends to form an endless loop; (d) first and second attachment means respectively located at said first and second air muscle spaced attachment sites, said first attachment means being such as to secure said tubular braiding against lengthwise movement thereof with respect to said joint first part at said first attachment site, and said second attachment means being such as to secure said tubular braiding against lengthwise movement thereof with respect to said joint second part at said second attachment site, the endless tubular braiding being thereby partitioned into first and second tubular braiding segments contiguous with one another aType: ApplicationFiled: January 27, 2010Publication date: January 26, 2012Applicant: THE SHADOW ROBOT COMPANY LIMITEDInventor: Richard Martin Greenhill
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Publication number: 20110303085Abstract: The invention relates to a piston-cylinder assembly, in particular for pneumatic, hydraulic or mechatronic systems, having a cylinder housing (3) and a piston (11), which is coupled to a piston rod, disposed in a cylinder housing (3) and disposed there such that it can move along a longitudinal axis. According to the invention, a measuring device (27) is disposed inside the cylinder housing (3).Type: ApplicationFiled: September 17, 2009Publication date: December 15, 2011Inventors: Mike Heurich, Tino Wiggers
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Publication number: 20110303084Abstract: A gas cylinder actuator with overtravel safety device, comprising a tubular jacket which is closed by a bottom provided with a gas filling valve and at the opposite end by a head portion, which is provided with a hole for the passage of a stem with a piston; the gas cylinder actuator has, on the inner face of the jacket, in the compression chamber, a region in low relief designed to interrupt the seal provided by a gasket of the piston or the head portion, which act against the inner face.Type: ApplicationFiled: March 9, 2010Publication date: December 15, 2011Inventors: Augusto Cappeller, Massimo Fiorese, Daniel Fantinato
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Publication number: 20110283881Abstract: A cylinder block assembly for a hydraulic device. The cylinder block assembly includes a cylinder block with a plurality of piston bores disposed therethrough. Circumferential grooves are disposed around the piston bore such that an elastic bushing may be disposed within the piston bore using a slip fit so that when the elastic material deforms the material deforms into the circumferential groove. By deforming into the circumferential groove the elastic bushing is locked in place and axial movement of the bushing in the bore is prevented.Type: ApplicationFiled: May 24, 2010Publication date: November 24, 2011Applicant: Sauer-Danfoss Inc.Inventors: Eric C. Bretey, Gregory H. Knop
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Publication number: 20110283882Abstract: A linear actuator includes an actuator wall, and the actuator wall includes a first wall layer having an inner surface that defines an actuator chamber. The actuator chamber is configured to accommodate an actuator fluid. The first wall layer is also subjected to a pre-load such that the first wall layer is compressively pre-stressed. The actuator wall further includes a second wall layer disposed outwardly from the first wall layer. The linear actuator further includes a piston supported within the actuator chamber, and the piston is movable in response to the actuator fluid entering and exiting the actuator chamber.Type: ApplicationFiled: May 13, 2011Publication date: November 24, 2011Inventor: Frantz D. Stanford
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Patent number: 8037809Abstract: A piston-and-cylinder assembly, used in cooling sys terns that may include, for example, refrigerators, air-conditioning systems and the like. In order to solve the problems of volumetric loss (or of cooling capacity) of compressors in general, according to the present invention, one foresees configuring the cylinder (11) of the compression chamber in such a manner that the friction will be as low as possible in the phase in which the gas being compresses still does not exert a significant force onto the piston (10) top and will only have a significant effect during the phase in which the gas to be compressed exerts a greater force onto the piston (10), a moment when the volumetric loss impairs the efficiency of the compressor.Type: GrantFiled: July 21, 2006Date of Patent: October 18, 2011Assignee: Whirlpool S.A.Inventors: Egerhardt Graf, Rodrigo Link, Fabio Henrique Klein, Cristiano Rafael Schramm
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Publication number: 20110239858Abstract: Cylinder head made of cast iron has valve seats provided therein. The valve seats include an annular bore provided in the cast-iron material, a nickel-based intermediate layer which is provided thereon and a contact layer which is provided on said intermediate layer. The contact layer has an air-hardening tool steel, wherein said layers are provided in such a manner that an annularly acting compressive stress is present near the free surface of said contact layer. The invention further includes a method for the production thereof.Type: ApplicationFiled: August 3, 2009Publication date: October 6, 2011Inventors: Hendrik Marcel Slot, Sebastiaan Maria Krosse, Johannes Petruz Zijp
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Publication number: 20110239857Abstract: According to one embodiment, there is provide a piston pump, including: a cylinder having a bottomed cylindrical shape; a piston slidable within the cylinder, the cylinder and the piston defining a pressure chamber therebetween; a suction valve unit disposed in a suction passage of the pressure chamber; and a discharge valve unit disposed in a discharge passage of the pressure chamber, wherein the piston includes a cylindrical piston portion and a large diameter piston portion provided to cover one end of the cylindrical piston portion, and wherein the large diameter piston portion includes a working fluid guide groove extending thereinside along the axial direction of the piston.Type: ApplicationFiled: March 28, 2011Publication date: October 6, 2011Applicant: NISSIN KOGYO CO., LTD.Inventor: Masatoshi IYATANI
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Publication number: 20110232478Abstract: The present invention provides a cylinder liner excellent in adhesion and heat conductivity with a cylinder block. The cylinder liner 1 of the present invention is formed from cast iron or steel. The cylinder liner 1 is formed with a thermal sprayed coated film 6 at its outer circumferential surface 3 and top surface 4. As the thermal sprayed material, Al, an Al alloy, Fe, an Fe alloy, Zn, a Zn alloy, Cu, a Cu alloy, etc. is used. The cylinder liner 1 is cast around a cylinder block formed from an aluminum alloy or other light alloy, by insert casting, at its outer circumferential surface 3, top surface 4, and bottom surface 5. The cylinder liner 1 is chamfered at the connecting edges of its top surface 4 and inner circumferential surface 7. The thermal sprayed coated film 6 is preferably formed at the top surface 4 part to extend over the chamfering part.Type: ApplicationFiled: March 8, 2011Publication date: September 29, 2011Applicants: TEIKOKU PISTON RING CO., LTD., TEIPI INDUSTRY CO., LTD.Inventors: Masami Horigome, Giichiro Saito
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Publication number: 20110162521Abstract: An MMC cylinder liner comprises an inner tubular portion and an outer tubular portion. The inner tubular portion includes a metal matrix composite formed of a compact impregnated with an Al—Si alloy wherein the compact is made of a reinforcing material. The outer tubular portion is formed of the Al—Si alloy. The Si concentration of the Al—Si alloy impregnated into the compact of the inner tubular portion is different from the Si concentration of the Al—Si alloy of the outer tubular portion.Type: ApplicationFiled: March 12, 2010Publication date: July 7, 2011Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, CENTRAL MOTOR WHEEL CO., LTD.Inventors: Toshihiro Takami, Manabu Tsukimoto, Junichi Matsudaira, Kunio Kumagai, Ikuo Suzuki, Makoto Fujita
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Publication number: 20110154983Abstract: The present invention relates to a cylinder sleeve (10) having an outer mantle surface (11) that has a surface structure (12, 112, 212). According to the invention, it is provided that the mantle surface (11) is provided with elevations (13, 113, 213; 14, 118, 219), that each elevation (13, 113, 213; 14, 118, 219) has at least one rounded area (16, 116, 216) in the region of its base (B), that some of the elevations (13, 113, 213) have at least one undercut (15, 115, 215), and that at least one elevation (14, 118, 219) without undercut is disposed between two elevations (13, 113, 213) with undercut (15, 115, 215).Type: ApplicationFiled: December 3, 2010Publication date: June 30, 2011Applicant: MAHLE International GmbHInventors: Ulrich Bischofberger, Stefan Gaiselmann
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Publication number: 20110120418Abstract: A pump head suitable for use in a fuel pump for a common rail fuel injection system, comprises a pump head housing defining a plunger bore and a pumping chamber. Fuel is pressurized within the pumping chamber by a plunger reciprocating within the plunger bore. The pump head housing includes an inlet valve arrangement for controlling fuel flow into the pumping chamber. The inlet valve arrangement includes a valve member movable between open and closed positions in response to fuel pressure within a gallery. The gallery communicates with an external chamber defined by a closure means externally mounted to the pump head housing. In use, the gallery communicates with a source of low-pressure fuel via the external chamber. The pump head housing has a projection which locates the closure member on the pump head housing.Type: ApplicationFiled: July 13, 2009Publication date: May 26, 2011Applicant: Delphi Technologies Holding, S.arlInventors: Antonin Cheron, Paul Buckley, Miguel G Calvo
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Publication number: 20110094376Abstract: A cylinder portion is divided into a cylinder main body, and two side cylinders coupled to opposite ends of the cylinder main body. The cylinder main body is configured so that a sample-enclosing capsule in which a sample and a pressure medium are enclosed can be disposed inside the cylinder main body. Pistons for load transmission are disposed at opposite ends of the interior of the cylinder portion; and locking nuts are provided on the outer sides of the positions. The pistons are moved in an axial direction by screwing the locking nuts. With this configuration, a piston cylinder-type high-pressure generating device in which a cylinder having a small outer diameter is formed of a non-magnetic material can generate a high pressure while securing a sample space having a predetermined effective volume.Type: ApplicationFiled: April 14, 2009Publication date: April 28, 2011Applicants: KYUSHU INSTITUTE OF TECHNOLOGY, HMD CORPORATIONInventors: Masaki Mito, Masayoshi Hamada
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Patent number: 7913613Abstract: A piston/cylinder unit comprising a cylinder, a piston which reciprocates in the axial direction of the cylinder between first and second piston positions, and a fluid bearing provided between the piston and the cylinder which supports the piston such as to be axially displaceable in the cylinder and defines the piston-side bearing surface, enclosing the circumference of the piston at least over a part of the axial extension of the piston, whereby the fluid bearing comprises a number of outlet nozzles for the fluid arranged in the inner circumferential wall of the cylinder. The outlet nozzles are arranged such that when the piston is in the second position, first outlet nozzles provide the front or middle region of the piston-side bearing surface relative to the piston longitudinal extension and second outlet nozzles provide the middle region of the piston side bearing surface with pressure fluid.Type: GrantFiled: December 22, 2005Date of Patent: March 29, 2011Assignees: BSH Bosch und Siemens Hausgeraete GmbH, AeroLas GmbHInventors: Michael Muth, Georg Slotta
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Patent number: 7900550Abstract: The present invention relates to a compression chamber unit (1) of an air pump, comprising a cylindrical body part (3) provided with at least one outlet nozzle (4), a number of connecting flanges (6) and a number of connecting bosses (7), wherein the cylindrical body part (3) is an extruded cylinder and a cap (2) is formed with outlet nozzle (4), connecting flanges (6) and connecting bosses (7), where the cap (2) is adapted to engage with a first end part (10) of the cylindrical body part (3). The present invention further more relates to a method for forming a compression chamber unit (1) which method comprises the following steps: the cylindrical body part (3) is extruded, and the cap (2) is moulded onto the cylindrical body part (3).Type: GrantFiled: December 22, 2005Date of Patent: March 8, 2011Assignee: Active Tools International (HK) Ltd.Inventor: Thomas Lætgaard
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Publication number: 20110048226Abstract: A master cylinder includes a cylinder body which an operating fluid is introduced from a reservoir, a piston which is slidably fitted in the cylinder body and defines a pressure chamber inside the cylinder body, a supply pathway which is formed in the cylinder body and supplies the operating fluid from the reservoir to the pressure chamber, a bypass pathway which bypasses the supply pathway and allows the reservoir to communicate with the pressure chamber, and a check valve which is installed in the bypass pathway and opens a valve when the pressure inside the pressure chamber is lower than the pressure of the reservoir.Type: ApplicationFiled: August 27, 2010Publication date: March 3, 2011Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Ryoichi YAGI, Naganori KOSHIMIZU, Takato OGIWARA
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Publication number: 20110048225Abstract: On a protrusion-formation portion of a rod guide, there are provided a first annular protrusion for supporting a radially outer side of a lid body and a second annular protrusion for supporting a radially inner side of the lid body. Accordingly, when an upper end side of an outer cylinder is caulked, the first annular protrusion provided to the rod guide is allowed to sandwich and fix the radially outer side of the lid body between the first annular protrusion and the caulked portion. Further, although the lid body is strongly pressed to the rod guide with use of a presser at the time of caulking the upper end side of the outer cylinder, a pressing force acting onto the lid body can be received by the second annular protrusion. As a result, the lid body is prevented from being permanently deformed. With this structure, the lid body can be formed to have a small thickness dimension.Type: ApplicationFiled: August 31, 2010Publication date: March 3, 2011Inventors: Tadashi YOSHIDA, Masahiro Ashiba
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Publication number: 20110041683Abstract: In a rodless cylinder 1, a band accommodating depression 60 having a transverse inner surface 62 extending along the width of a slit 12 of an inner hole 10 of a tube 2 and a wall surface 64 inclined with respect to the transverse inner surface 62 is formed on each side of the inner opening of the slit 12. In the case where one of the edges of the inner seal band 42 comes into contact with one of the wall surfaces 64, the other edge of the inner seal band 42 comes into contact with the other one of the transverse inner surfaces 62, while at the same time securing a distance I between the inner seal band 42 and an inner opening 58 of the slit 12. Once a fluid is introduced into the tube 2, the inner seal band 42 can be bent toward the slit 12 due to the distance I even in the case where one of the edges of the inner seal band 42 comes into contact with the transverse inner surface 62 and the other edge comes into contact with the wall surface 64.Type: ApplicationFiled: April 27, 2009Publication date: February 24, 2011Inventor: Tsuyoshi Yonezawa
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Publication number: 20110030553Abstract: A hydraulic cylinder comprising: a cylinder body which has an open end with an opening and an edge extending therearound, which cylinder body also has an inner surface; a piston rod; a close-off member which has an insert part, which insert part protrudes in a fitting manner into the open end of the cylinder body, which insert part has an outer circumferential face, wherein the close-off member also has a flange opposing the edge of the cylinder body; coupling means which are operable between the inner surface of the cylinder body and the outer circumferential face of the insert part for securing, in at least one axial direction, the close-off member in the cylinder body, and a clamping ring which is clamped between the flange and the edge at the open end of the cylinder body. The clamping ring is made of a resilient, compressible material, in particular is made of an elastomer. The clamping ring is clamped, when compressed in the axial direction, between the flange and the edge at the open end.Type: ApplicationFiled: March 18, 2009Publication date: February 10, 2011Inventor: Jan Albertus Beumer
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Publication number: 20110023707Abstract: A hydraulic cylinder device includes a cylinder, an axle and two blade units. The cylinder includes a chamber with a cross-sectional shape like a circle overlapping another circle. The axle is inserted through the cylinder. The axle includes two opposite grooves defined therein. Each of blade units includes a blade, a primary roller and a secondary roller. The blade is movably disposed in a related one of the grooves and made with a groove defined in a side close to an internal side of the cylinder. The secondary roller is disposed in the groove. The primary roller is disposed in the groove so that the primary roller is in contact with the secondary roller on one hand and in contact with the cylinder on the other hand.Type: ApplicationFiled: July 31, 2009Publication date: February 3, 2011Inventor: Yu-Hui Liao
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Publication number: 20100326270Abstract: A method of roughening metal surfaces of a workpiece such as a cylinder bore of an internal combustion engine to improve the adhesion of layers thermally sprayed thereon. Uniform grooves are formed in the surface and ridges are arranged between the grooves. The grooves may be formed by a process such as turning, drilling, milling or rolling. The ridges are plastically deformed in order to form undercuts in the grooves, with the degree of plastic deformation of the ridges varying regularly in the longitudinal direction of the grooves. Local deformations are produced in the ridge, and these bring about regular undercuts in the groove. This makes it possible to produce the undercuts in identical dimensions with little effort. Furthermore, since the groove is now not completely constricted by undercuts, it can be filled more effectively with spraying material.Type: ApplicationFiled: June 15, 2010Publication date: December 30, 2010Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventors: Thomas Doerfler, Clemens Maria Verpoort
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Publication number: 20100313746Abstract: A cylinder block has functional surfaces machined by cutting and with at least one cylinder (5) with a coating. To simplify the production of the cylinder block, the cylinder block (1) has an inwardly projecting collar (25, 26) at the end of the cylinder (5) to delimit the cylinder (5) in the axial direction. The side of the collar (25, 26) facing away the from the cylinder (5) constitutes a stop for a suction extraction device (46) that serves for extracting excess coating material by suction.Type: ApplicationFiled: May 19, 2010Publication date: December 16, 2010Applicant: DR. ING. H.C.F. PORSCHE AKTIENGESELLSCHAFTInventors: Michael Paul, Frank Ickinger
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Publication number: 20100301578Abstract: A piston coupled to a piston rod is inserted in a cylinder, and an outer cylinder is disposed around the cylinder so as to define a reservoir therebetween. A separator tube is disposed around the cylinder so as to define an annular passage therebetween. The piston rod is locked and unlocked so that a movement of the piston is prevented and allowed, by closing and opening an electromagnetic open/close valve so as to block and allow a flow of hydraulic fluid through a flow passage between the annular passage and the reservoir. The separator tube has a greater thickness. O-rings are disposed so as to provide seals between the separator tube and the cylinder. The separator tube extends to positions such that the ends of the separator tube overlap a base valve and a rod guide, thereby holding the respective ends of the cylinder. Due to this configuration, it is possible to prevent deformation of the cylinder and the separator tube due to an increase in the hydraulic pressure, and improve the pressure resistance.Type: ApplicationFiled: May 24, 2010Publication date: December 2, 2010Inventors: Kenji NODA, Yoshiaki Totani
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MELT-SOLIDIFIED SUBSTANCE, COPPER ALLOY FOR MELT-SOLIDIFICATION AND METHOD OF MANUFACTURING THE SAME
Publication number: 20100297464Abstract: A melt-solidified substance includes melt-solidified portions formed by welding, build-up spray welding, metallizing or fusing. The melt-solidified portions have the alloy composition containing Zr: 0.0005 to 0.05 mass %, P: 0.01 to 0.34 mass %, Cu: the remainder and satisfying the relationship between the contents of P and Zr, [P]/[Zr]=0.3 to 20, and the mean grain size in the macrostructure after melt-solidification is 300 ?m or less. If Fe and/or Ni are contained in the melt-solidified portion as inevitable impurities, the content of Fe or Ni is restricted to be 0.3 mass % or less when either Fe or Ni is contained, and the total content of Fe and Ni is restricted to be 0.4 mass % or less when both Fe and Ni are contained.Type: ApplicationFiled: September 30, 2005Publication date: November 25, 2010Applicant: SANBO SHINDO KOGYO KABUSHIKI KAISHAInventor: Keiichiro Oishi -
Patent number: 7836816Abstract: A cylinder tube includes a cylinder hole therein through which a piston is displaceably inserted. A head cover and a rod cover are installed respectively into ends of the cylinder hole. Locking rings, each having a bent section, a pair of arm sections that extend from both ends of the bent section, and claw sections disposed on ends of the arm sections, are disposed in the cylinder hole. In addition, the locking rings are installed respectively in the cylinder hole through ring grooves, wherein the head cover and the rod cover are fixed by means of the locking rings.Type: GrantFiled: December 5, 2007Date of Patent: November 23, 2010Assignee: SMC Kabushiki KaishaInventor: Shioto Tokumoto
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Patent number: 7836817Abstract: A pair of recesses is formed on a cylinder hole of a cylinder tube, wherein the recesses are recessed further into the cylinder hole from an inner circumferential surface thereof. Projections that correspond to the recesses are disposed on a head cover and a rod cover, respectively, which are installed into both ends of the cylinder tube. The head cover and the rod cover that are accommodated in the cylinder hole are positioned through abutment of the projections against stepped portions of the recesses.Type: GrantFiled: December 4, 2007Date of Patent: November 23, 2010Assignee: SMC Kabushiki KaishaInventor: Shioto Tokumoto
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Publication number: 20100282073Abstract: Method for manufacturing a crankcase of a piston compressor, wherein the piston compressor is provided with a crankcase which is provided with recesses for therein receiving cylinders and with at least an inlet opening, wherein from a flat sheet at least one substantially rectangular body blank is manufactured provided with the desired cylinder receiving recesses, wherein the body blank is then angle bent in an angle bending machine for forming a body part having a limited number of folds, wherein at least two substantially flat end walls are manufactured from a flat sheet, wherein thereupon the at least one body part and the at least two end walls are positioned with respect to each other using a positioning tool and are connected with each other with a welding robot for forming the crankcase. Also disclosed is a crankcase obtained with the method, and a piston compressor provided with such a crankcase.Type: ApplicationFiled: November 24, 2008Publication date: November 11, 2010Applicant: GRASSO-PRODUCTS B.V.Inventors: George Jan Bon, Jacobus Petrus Maria van Houten, Joseph Johannes Adrianus Maria van den Oetelaar
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Patent number: 7806041Abstract: A cylinder body includes a first guide surface made up from first guide grooves and a first bulging portion, wherein a slide table is displaceably supported on the first guide surface via a guide mechanism. Additionally, guide members of a guide block that constitutes the guide mechanism are inserted into and fixed within the first guide grooves. Further, the cylinder body is equipped with a second guide surface, which is formed with substantially the same shape as the first guide surface. In the event that the first guide surface is oriented upwardly and the slide table is installed thereon, the second guide surface acts as a mounting surface, whereas, in the event that the second guide surface is oriented upwardly and the slide table is installed thereon, the first guide surface acts as the mounting surface.Type: GrantFiled: October 30, 2007Date of Patent: October 5, 2010Assignee: SMC Kabushiki KaishaInventors: Mitsuhiro Someya, Masayuki Hosono, Kouichirou Kanda, Yoshihiro Toshimori
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Publication number: 20100247357Abstract: The object of the invention is to provide a reliable and inexpensive combination of a chamber and a piston to be used in any device where such a combination is needed so that it comply with specific demands towards the operation force for e.g. pumps, specifically manually operated pumps. By a device comprising a chamber and a piston positioned inside the chamber said chamber and said piston relatively movable to each other in a predetermined direction of movement between a first position and a second position of which the cross-section of the chamber in a plane perpendicular to the direction of movement is larger at the first position than at the second position, the change in the cross section of the chamber is essentially continuous between the first position and the second position and the cross-section of the piston in a plane perpendicular to the direction of movement is arranged to adapt itself to the cross-section of the chamber.Type: ApplicationFiled: August 3, 2009Publication date: September 30, 2010Inventor: Nicolaas Van der Blom
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Publication number: 20100229716Abstract: A concentric slave cylinder for a clutch has a housing 12 with a through bore 16. An annular piston 26 is movably disposed in the bore 16 and a release bearing 46 is mounted to the piston. At least at least part of the bore 16 has a non-circular shape in lateral cross-section and the piston 26 has a correspondingly shaped outer periphery so as to be non-rotatable but axially moveable in bore. The non-circular portion of the bore 16 and the outer periphery of the piston 26 may be elliptical or they may be shaped to define three, four or more lobes 72.Type: ApplicationFiled: March 1, 2010Publication date: September 16, 2010Applicant: AP RACING LIMITEDInventor: Jeremy Govan
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Publication number: 20100218672Abstract: A reciprocating piston machine, in particular a swash ring compressor or swash plate compressor, with pistons which are received so as to be movable in a reciprocating manner in cylinder spaces of a cylinder block with a cylinder head made from a material of lower strength such as aluminum material and which are driven by a driving mechanism which is arranged in a driving mechanism housing part made from a material of higher strength such as steel material. The driving mechanism housing part made from the material of higher strength is fastened to the cylinder block which is made from a material of lower strength such as aluminum material.Type: ApplicationFiled: September 13, 2008Publication date: September 2, 2010Inventors: Tilo Schäfer, Jan Hinrichs
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Patent number: 7785084Abstract: A pumping apparatus for pumping a liquid from a source to a target includes a pump having a pump housing and a pump piston. The pump housing defines a central longitudinal bore, a transverse bore communicating with the central bore for conveying a liquid through the pump housing and a liquid reservoir communicating with the central bore and the transverse bore for retaining an amount of the liquid conveyed through the transverse bore. The pump piston is axially and rotatably slidable within the central longitudinal bore for pumping the liquid through the transverse bore.Type: GrantFiled: April 28, 2006Date of Patent: August 31, 2010Assignee: Fluid Metering, Inc.Inventors: David Rawlings, Harry E. Pinkerton, III