Patents Issued in December 9, 2003
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Patent number: 6659720Abstract: A centrifugal pump includes a C-shaped sealing assembly including an annular spring disposed between opposing legs of a base member. The spring biases the legs away from one another into sealing positions. In other embodiments, a vertical pump may be provided so as to include an oil recirculation system which enables an oil-based lubricant to be utilized instead of grease. In still other embodiments, the axial location of a pump shaft may be adjusted by rotating a bearing housing relative to the bearing frame where the two are threadedly connected to one another.Type: GrantFiled: July 19, 2002Date of Patent: December 9, 2003Assignee: Environamics CorporationInventor: Robert E. Rockwood
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Patent number: 6659721Abstract: Ceiling fan blades for maximizing air flow at operational speeds of up to approximately 200 revolutions per minute(rpm). The blades have a positive twist at the tip ends of approximately 5 degrees to approximately 10 degrees parallel to the ceiling. The root end of the blades closest to the motor can have a positive twist exceeding that of the tip end and can be approximately 20 to approximately 35 degrees parallel to the ceiling. The ceiling fans can have individual blade lengths of approximately 20 inches and overall spans of up to approximately 52 inches and up to approximately 54 inches. Each embodiment can use three, four, and five blades, with the blades being made of injection molded plastic. and the like. The embodiments can include built in light kit domes.Type: GrantFiled: October 12, 2001Date of Patent: December 9, 2003Assignee: University of Central FloridaInventors: Danny S. Parker, Guan Hua Su, Bart D. Hibbs
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Patent number: 6659722Abstract: The present invention comprises a rotor blade and method of manufacture thereof. The rotor blade of the present invention incorporates a number of novel features in order to increase its reliability and strength while reducing its weight. In certain embodiments, the rotor blade of the present invention incorporates a flexural strap in place of traditional pitch bearings. In certain embodiments, the rotor blade of the present invention is manufactured using a unique fiber placement layup technique to reduce failure modes and maximize the fatigue strength of the part.Type: GrantFiled: October 12, 2001Date of Patent: December 9, 2003Assignee: Bell Helicopter Textron, Inc.Inventors: Ajay Sehgal, Eric C. Boyle, Christopher Finch, Robert S. Thompson
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Patent number: 6659723Abstract: A fan blade configuration for use with a fan in an engine driven generator is disclosed. The invention includes a plurality of fan blade segments fixed to a hub at one end of a rotary shaft. Upon transmission of a driving force to the rotary shaft, the fan blades and hub are rotated to cool the engine driven generator. The fan blades are arranged to extend away from the rotating shaft, and each have a plurality of fins and protrusions molded on opposite sides of the fan blade segments. The fan blade configuration also includes a flexible plate to bias the fan blades against the hub and stabilize the fan blades during rotation.Type: GrantFiled: November 16, 2001Date of Patent: December 9, 2003Assignee: Illinois Tool Works Inc.Inventor: Herbert A. Bankstahl
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Patent number: 6659724Abstract: Front edges 212b of blades 212 are so constituted as to be deviated toward the upstream side in the air stream beyond an axial end surface 211a, as viewed from a direction at right angles to the axial direction of a boss 211, and the blades 212 on the root side thereof are continuous to the axial end surface 211a through smoothly curved surfaces 213. This enables the air to flow from the side of the axial end surface 211a toward the root side of the blades 212. Due to the air flowing from the side of the axial end surface 211a to the root side of the blades 212, therefore, the resistance decreases between the air and the surfaces of the blades 212 on the root side, making it possible to suppress the occurrence of stalling on the root side of the blades 212. The air on the front side of the boss 211 is effectively guided toward the outer direction (toward the blades 212), preventing a drop in the flow rate and in the fan efficiency of a blower 200.Type: GrantFiled: October 7, 2002Date of Patent: December 9, 2003Assignee: Denso CorporationInventors: Kazuhiro Takeuchi, Shinichi Oda, Isao Murai
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Patent number: 6659725Abstract: A vibration damper 46 for a gas turbine engine has convergent friction surfaces 48a and 48b and is located radially inward of the platforms 20a and 20b of two adjacent turbine blades. The angle subtended by the friction surfaces 48a and 48b is smaller than that subtended by the angled faces 22a and 22b associated with the platforms 20a and 20b. The center of mass of the damper 46 lies in a plane bisecting the angle subtended by the friction surfaces 48a and 48b. In use the damper 46 is urged radially outwards by centrifugal force so that at least one of the friction surfaces 48a and 48b makes planar contact with at least one of the angled faces 22a and 22b. Vibrational energy is dissipated by the resultant sliding movement between the friction surfaces 48a and 48b and the angled faces 22a and 22b. A secondary vibration damping mechanism arises from the oscillation of the damper 46 between the platforms 20a and 20b.Type: GrantFiled: March 28, 2002Date of Patent: December 9, 2003Assignee: Rolls-Royce plcInventors: Stuart Yeo, Peter J Goodman
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Patent number: 6659726Abstract: A system for variable speed control of a plurality of motors under variable load demand is provided. The system includes a constant power source and a plurality of motors having electrical circuits with switches to connect with the constant power source. The system further includes a variable speed drive for driving each of the plurality of motors at variable speed, wherein each of the plurality of motors includes a switch to connect with the variable speed drive. Each of the plurality of motors is selectively electrically connected with the variable speed drive and the constant power source via the switches, for driving the each of the plurality of motors at one of variable and constant speed in response to load demands. To prevent short cycling of the motors under situations of increasing system demand, the control algorithm for the electrical switches provides hysteresis by overspeeding one of the motors before switching from variable speed mode to constant speed mode.Type: GrantFiled: December 2, 2002Date of Patent: December 9, 2003Assignee: Carrier CorporationInventor: Steve Holden
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Patent number: 6659727Abstract: An improved control method for a dual mode compressor drive arrangement selectively operates an electric machine coupled to the compressor as a motor or a generator during operation of an engine coupled to the compressor for improved efficiency and performance. The machine is operated as a generator to increase the available power for vehicle electrical loads when compressor operation is not needed or when the engine is driving the compressor. Conversely, the machine is operated as a motor to drive the compressor under heavy engine loading or when the engine speed is outside a desired operating range defined in terms of compressor speed.Type: GrantFiled: September 7, 2001Date of Patent: December 9, 2003Assignee: General Motors CorporationInventors: Gregory Alan Major, George M. Claypole, Lawrence Ziehr, Mark D. Nemesh, Michael J. Miller
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Patent number: 6659728Abstract: An internal gear pump including a stepper motor coupled to a drive shaft that is coupled to a rotor and meshed with an idler is disclosed. A controller is linked to the stepper motor. The stepper motor imparts a stepped rotational movement to the drive shaft wherein a single 360° rotation of the drive shaft comprises a plurality of steps. The controller sends a signal to the stepper motor to rotate the drive shaft a predetermined number of steps, based upon an inputted dispense amount. The signal causes the stepper motor to rotate the drive shaft a predetermined number of steps. The controller calculates the predetermined number of steps based upon the inputted dispense amount using an algorithm that is derived experimentally that defines a relationship between dispense amount and the number of steps required for each dispense amount. The algorithm is unique for each fluid to be pumped.Type: GrantFiled: November 9, 2001Date of Patent: December 9, 2003Assignee: Viking Pump, Inc.Inventors: Matthew D. Bush, Howard E. Koth, Michael R. Crawford
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Patent number: 6659729Abstract: The invention provides a method of operating a screw compressor equipment without reducing the efficiency, in which a screw compressor 1 of which the internal volume ratio is variable by means of an internal volume ratio control valve is driven by a driving machine 2, the discharge side of the compressor 1 is communicated with the suction side of the same by way of a bypass control valve 9 as needed, the internal volume ratio control valve 3 is always controlled to be located at a position calculated so that the internal volume ratio with which the polytropic efficiency is maximum is obtained, and gas flow rate is controlled by controlling the rotation speed under normal conditions and controlled by controlling the bypassing flow rate from the discharge side to the suction side under very low rotation speed.Type: GrantFiled: February 15, 2001Date of Patent: December 9, 2003Assignee: Mayekawa Mfg. Co., Ltd.Inventors: Toshiro Hattori, Katsuyuki Takahashi, Kiyoshi Tanaka
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Patent number: 6659730Abstract: A method and apparatus is provided for supplying both cryogenic liquid and vapor from a storage tank to a pump to reduce the need for venting. The pump is operable to pump cryogenic liquid or a mixture of liquid and vapor. Different operating modes are selectable to control mass flow rate through the pump. With one operating mode a high flow rate is achieved by supplying only cryogenic liquid to the pump. By selecting another operating mode, a lower mass flow rate is achieved by simultaneously supplying liquid and vapor from the storage tank to the pump. The pump preferably has an inducer with at least two chambers and valves for recycling excess fluid within the inducer instead of returning it to the storage tank. The reciprocating pump is preferably double acting such that fluid is discharged from the pump during both extension and retraction strokes.Type: GrantFiled: October 5, 2001Date of Patent: December 9, 2003Assignee: Westport Research Inc.Inventors: Anker Gram, Stephen Duncan Noble
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Patent number: 6659731Abstract: A pressure exchanger for transferring pressure energy from one third flow to a second where two end covers (13, 14), a rotor (11) and a rotor liner (12) are mounted together via a centre bolt (10) in a pressure housing (1) in order to reduce elastic deformation, essentially tensile stress, and to protect the pressure exchanger against impact or shock. One end cover (13) is arranged for inlet of fluid at high pressure and outlet of the same fluid depressurized in a corresponding end cover (14) via a central course in the rotor. The second end cover (14) has in addition an inlet for fluid at low pressure and an outlet for the same fluid under high pressure. A base (2) which is attached with lease pins at the bottom of the pressure housing (1) has external connections (3, 4) and internal passages, which are connect with the inlet (24) of fluid at low pressure together with the outlet (23) for depressurized fluid in the and cover (14).Type: GrantFiled: March 29, 2000Date of Patent: December 9, 2003Assignee: Energy Recovery International, Inc.Inventor: Leif J. Hauge
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Patent number: 6659732Abstract: A supercharging device of a hermetic compressor comprises a suction chamber connected with a suction pipe and a cylinder, the suction chamber formed at lower side of a cylinder block; a suction fan rotatably disposed in the suction chamber; a driving pulley disposed on a lower end of a crankshaft; a driven pulley disposed on a rotating shaft of the suction fan; and a belt connecting the driving pulley and the driven pulley. Accordingly, the suction fan rotates with the crankshaft, and moves the refrigerant in the suction chamber to the cylinder, and thus the amount of the refrigerant drawn into the cylinder is increased and consequently the volume efficiency of the compressor is increased.Type: GrantFiled: November 7, 2001Date of Patent: December 9, 2003Assignee: Samsung Gwangju Electronics Co., Ltd.Inventor: Seung-don Seo
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Patent number: 6659733Abstract: A variable displacement compressor includes a cylinder block and a valve plate connected to the cylinder block. The cylinder block has cylinder bores and a central supporting hole. A piston is housed in each cylinder bore to compress gas. A swash plate is connected to the pistons to convert rotation of the drive shaft into reciprocation of the pistons. A cylindrical body is housed in the supporting hole. A coil spring located in the supporting hole presses the cylindrical body toward the swash plate. The cylindrical body moves axially as the swash plate is inclined. When the swash plate is minimally inclined, the valve plate receives force from the swash plate through the cylindrical body. Therefore, axial forces from the swash plate are not exerted on the drive shaft.Type: GrantFiled: September 25, 2001Date of Patent: December 9, 2003Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Kenji Takenaka, Tetsuhiko Fukanuma, Masahiro Kawaguchi
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Patent number: 6659734Abstract: The invention concerns a pump for pumping a first liquid, called transferred liquid, and comprising a main unit (18) for pumping the transferred liquid actuated by an auxiliary unit (20) pumping a second liquid, called working liquid. The main (18) and auxiliary (20) units are housed in a casing (16) generally cylindrical in shape. The main unit (18) comprises at least two valves (36, 38), for respectively sucking up and delivering the transferred liquid, borne by a valve body (40) housed in the casing (16). Each valve (36, 38) communicates with two chambers, respectively a suction chamber (46) and a delivery chamber (48) for the transferred liquid, defined by opposite surfaces (50, 52) provided in the valve body (40) and the casing (16). Said surfaces (50, 52) comprise two matching shoulders (50E, 52E) pressed against each other so as to form a tight joint plane separating the suction chamber (46) and the delivery chamber (48).Type: GrantFiled: September 27, 2001Date of Patent: December 9, 2003Assignees: Peugeot Citroen Automobiles SA, Siemens Automotive SAInventor: Christian Hervault
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Patent number: 6659735Abstract: A scroll compressor that simplifies the structure of a valve and decrease the size of the entire compressor includes a casing having a first chamber into which a fluid is sucked and a second chamber at which compressed fluid is discharged, a driving unit housed inside the casing to generate a driving force, a compressing unit having a fixed scroll and an orbiting scroll connected to the driving unit by a rotational shaft to compress and discharge the fluid when the driving unit is operated. A valve assembly is rotatively installed to the upper surface of the fixed scroll, opening/closing a discharge hole at which the compressed fluid is discharged and opening/closing a passage connecting the first chamber and the second chamber.Type: GrantFiled: January 30, 2002Date of Patent: December 9, 2003Assignee: LG Electronics Inc.Inventor: Su Chul Kim
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Patent number: 6659736Abstract: A mounting arrangement for a hermetic compressor, comprising a shell (10) formed of a metallic plate and incorporating tubular projections (12) with the upper end (12a) opened to the inside of the shell (10) and with the lower end (12b) closed, fitted and tightly retained, by mechanical deformation of the parts, inside a drawn recess (22) of a respective basic plate (20) to be affixed under the shell (10).Type: GrantFiled: August 2, 2001Date of Patent: December 9, 2003Assignee: Empresa Brasileira de Compressores S.A. -EmbracoInventors: Sérgio Luiz Maganhoto, João Manoel Mendes
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Patent number: 6659737Abstract: A fluid pump includes a pump housing having a housing cavity with an inlet and an outlet. An encapsulated stator assembly is positioned within the housing cavity and at least partially defines a fluid passage from the inlet to the outlet. A polymeric capsule member encloses and seals the encapsulated stator assembly, protecting the motor from, and providing heat transfer to, the working fluid. A stator provides a magnetic field which drives a rotor assembly. The rotor assembly rotates an impeller for pumping fluid from the inlet to the outlet.Type: GrantFiled: February 5, 2001Date of Patent: December 9, 2003Assignee: Engineered Machined Products, Inc.Inventors: Mark Bader, Michael P. Lasecki, Steven Shiverski, Kenneth A. DeGrave, Jeremy S. Carlson
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Patent number: 6659738Abstract: A dynamotor capable of operating as either a motor or a generator is used with both the armature portion and the field portion thereof capable of being rotated. In the case where a pulley operatively interlocked with the output shaft of the prime mover is mounted on the rotary shaft of the armature portion, the drive shaft of the compressor is mounted on the rotating field portion. Once the dynamotor is operated in motor mode, the rotational speed of the compressor is increased to the sum of the input rotational speed and the rotational speed of the dynamotor. The compressor is stopped by disconnecting a power feed circuit. When the input rotational speed is too high, the dynamotor is operated in generator mode. In this way, the rotational speed is reduced in accordance with the generated electric energy.Type: GrantFiled: February 14, 2002Date of Patent: December 9, 2003Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Shigeki Iwanami, Yukio Ogawa, Takashi Inoue, Hironori Asa
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Patent number: 6659739Abstract: The present invention provides an externally mounted assembly for supporting a rotatable shaft member driven by an electric motor. The externally mounted assembly comprises an annularly projected bearing support member disposed on a substantially vertical plane and a bearing member mounted on the bearing support member. Such bearing member is connectable with the rotatable shaft member for supporting such rotatable shaft member thereby reducing extraneous vertical and horizontal movement of such rotatable shaft member while permitting such rotatable shaft member to rotate freely.Type: GrantFiled: September 6, 2002Date of Patent: December 9, 2003Assignee: Westinghouse Air Brake Technologies CorporationInventors: James M. Varney, Brian L. Cunkelman, Walter E. Goettel
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Patent number: 6659740Abstract: A fluid circulator made up of an admission orifice, a pump body and a delivery orifice, the pump body having two rigid walls defining therebetween a circulation space for fluid circulation from the admission to the delivery orifice. A deformable membrane is maintained under tension in the circulation space parallel to the circulation direction and has one edge located near the admission orifice for coupling to a motor generating a periodic excitation force, the circulation space having a cross section perpendicular to the circulation direction which has a size measured along the periodic force direction progressively decreasing from the admission to the delivery orifice.Type: GrantFiled: March 8, 2002Date of Patent: December 9, 2003Inventor: Jean-Baptiste Drevet
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Patent number: 6659741Abstract: A travelling valve assembly for use in a sucker rod activated fluid pump includes: a flow through body member having at least one rounded groove formed in the lower end of a central passageway of the flow through body member; and a downwardly depending member adapted to strike a ball valve of the valve assembly after the ball valve rises off a valve seat member of the valve assembly.Type: GrantFiled: September 28, 2001Date of Patent: December 9, 2003Inventor: Jeffrey D. Spears
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Patent number: 6659742Abstract: A refrigerant compressor includes a front housing, a cylinder block, a rear housing, and a valve plate positioned between the cylinder block and the rear housing, in which the valve plate has a suction hole formed therethrough. The compressor also includes a suction chamber and a suction valve reed formed on the valve plate. The compressor further includes a limiting recess formed within an end of the cylinder block adapted to receive the suction valve reed. The limiting recess includes an arced segment intersecting a center axis of the suction valve reed. Moreover, the portion of the arced segment which intersects the center axis of the suction valve reed has a corresponding tangential line at the point of intersection which forms an oblique angle relative to the center axis of the suction valve reed.Type: GrantFiled: February 28, 2002Date of Patent: December 9, 2003Assignee: Sanden CorporationInventor: Satoshi Oofuchi
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Patent number: 6659743Abstract: The present invention has an object of offering a scroll fluid machine having a multi-stage compressing part which is characterized in that volumes of a sealed spaces is less scattering thereof corresponding to the given angle rotational amount of the revolving scroll driving shaft.Type: GrantFiled: March 7, 2002Date of Patent: December 9, 2003Assignee: Anest Iwata CorporationInventors: Hideyuki Kimura, Atsushi Unami
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Patent number: 6659744Abstract: This invention relates to expansible chamber positive displacement pumps, motors, and engines and includes variable displacement features. It provides a different method of making vane, piston, and roller abutment pumping devices which has benefits in sealing, dynamic and pressure balancing, and increased rotational speeds; resulting in better performance and higher efficiency. Since this is a technology that is parallel to existing technologies, this application is complex.Type: GrantFiled: April 17, 2001Date of Patent: December 9, 2003Inventor: Charles Dow Raymond, Jr.
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Patent number: 6659745Abstract: An object of the present invention is to provide a scroll compressor which can improve the decrease in the compression ratio due to the leakage of compressed gas via a tip clearance between adjacent compression chambers, which can be assembled with fewer processes, and which can be manufactured at a low cost.Type: GrantFiled: July 22, 2002Date of Patent: December 9, 2003Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Katsuhiro Fujita, Makoto Takeuchi
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Patent number: 6659746Abstract: A Roots pump rotates a plurality of rotors by a pair of rotary shafts to draw gas. Each rotary shaft extends through a rear housing member of the Roots pump. An annular shaft seal is fitted around each rotary shaft and is received in a recess formed in the rear housing member. A labyrinth seal is located between an end surface of each shaft seal and the bottom of the associated recess. A resin layer is firmly attached to the end surface of each shaft seal. As a result, oil is reliably prevented from leaking into a pump chamber.Type: GrantFiled: February 26, 2002Date of Patent: December 9, 2003Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Nobuaki Hoshino, Mamoru Kuwahara, Masahiko Okada, Shinya Yamamoto
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Patent number: 6659747Abstract: A Roots pump rotates a plurality of rotors by a pair of rotary shafts to draw gas. Each rotary shaft extends through a rear housing member of the Roots pump. An annular shaft seal is fitted around each rotary shaft and is received in a recess formed in the rear housing member. A labyrinth seal is located between an end surface of each shaft seal and the bottom of the associated recess. This enlarges the diameter of each labyrinth seal, thus preferably preventing oil from leaking to a pump chamber.Type: GrantFiled: February 26, 2002Date of Patent: December 9, 2003Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Shinya Yamamoto, Masahiro Kawaguchi, Satoshi Egashira
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Patent number: 6659748Abstract: An internal geared machine capable of forward and reverse operation in a closed circuit having a pinion and an internal toothed ring gear meshing with the pinion and disposed in a housing. A filling comprising two identical filler pieces fills a sickle-shaped space between the pinion and ring gear and a single stop pin mounted in the housing supports both of the filler pieces by their front ends. A pair of axial discs are seated on the pinion shaft on respective sides of the pinion and axial pressure fields and control fields provide opposing pressures against the axial discs.Type: GrantFiled: April 30, 2002Date of Patent: December 9, 2003Assignee: Voith Turbo GmbH & Co. KGInventors: Franz Arbogast, Günther Nagel
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Patent number: 6659749Abstract: The present invention provides a hermetic or open compressor for hydrocarbon refrigerant having high reliability. According to the present invention, in the compressor using hydrocarbon as refrigerant, synthetic oil such as polyalkylene glycol oil, ester oil or ether oil is used as freezer oil. Sliding member of the compressor includes both a portion made of aluminum material and a portion made of iron material. Therefore, it is possible to realize a compressor having excellent wear resistance and high reliability.Type: GrantFiled: January 17, 2002Date of Patent: December 9, 2003Assignee: Matsushita Electric Industrial Co., LTDInventors: Mototaka Esumi, Osamu Aiba, Shuichi Yamamoto
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Patent number: 6659750Abstract: A mold is provided for forming molded parts having flash seams which are moved to inconspicuous locations. The mold, which is typically used to make blow molded parts, includes two or more mold blocks and removable inserts which allow relocation of flash seams and at the same time allow removal of the finished part from the mold.Type: GrantFiled: November 1, 2000Date of Patent: December 9, 2003Assignee: Omnimold, LLCInventors: Shawn L. Overmyer, Martin Cass
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Patent number: 6659751Abstract: A polymer substrate for radiation-induced graft polymerization in the form of a woven or non-woven fabric that comprises a woven or non-woven fabric composed of polymer fiber and a reinforcement polymer having a greater strength and a slower rate of radiation-induced graft polymerization than said polymer fiber. Also, radiation graft treated stock prepared from said polymer substrate. In another aspect, a radiation graft treated material in the form of a woven or non-woven fabric material that is composed of polymer monofilament fiber of which only the surface has undergone a radiation-induced graft polymerization but of which the center remains unaffected by grafting.Type: GrantFiled: February 9, 2001Date of Patent: December 9, 2003Assignee: Ebara CorporationInventors: Takanobu Sugo, Kunio Fujiwara, Hideo Kawazu, Teruo Masubuchi, Junichi Kanno, Naotoshi Endo, Masaji Akahori
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Patent number: 6659752Abstract: A mold assembly accepts a flexible inserted decoration sheet and molds a cylindrical component to include the inserted decoration sheet. The mold assembly has a female part a male part insertable thereinto such that the component is molded therebetween from an introduced mold material. The female part includes a circular wall, a cylindrical wall, and a pair of demarcating ridges on the cylindrical wall. The pair of ridges accept the inserted decoration therebetween and hold the inserted decoration against the cylindrical wall such that the introduced mold material stays substantially on a side of the inserted decoration opposite the cylindrical wall of the female part.Type: GrantFiled: October 31, 2001Date of Patent: December 9, 2003Assignee: Elster Electrically, LLCInventor: Lars Lindqvist
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Patent number: 6659753Abstract: Injection unit for an injection molding machine to process material, comprising a plasticizing cylinder, a screw, and a screw drive including two electric motors, such that the two motors have an electrically controlled connection to one another, to implement an injection and metering process, such that the two motors can be operated in the same or opposite direction of rotation and with the same or different rotational speed. A space is formed by at least two sleeves which can move relative to one another, and by respectively adjoining plate members, so as to take up lubricating oil, such that the sleeves can slide into one another, and the junctions of the parts which form the space are constructed tight against the environment, at least for lubricants.Type: GrantFiled: December 20, 2001Date of Patent: December 9, 2003Assignee: Battenfeld GmbHInventors: Harald Bleier, Werner Schaffer
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Patent number: 6659754Abstract: In an injection molding device used to inject a thermoset casting resin into a mold wherein the device includes a source of resin, a mold for receiving and curing the resin, a delivery vessel for injecting the resin into the mold, and a conduit in fluid communication between the mold and the delivery vessel, the improvement being a uniquely-configured piston for injecting the resin wherein the moveable end of the piston ram is substantially cone-shaped with the vertex of the ram cone extending toward the distal end of the ram body from which the casting resin is injected through the conduit into the mold. The interior, distal end of the ram body is also substantially cone-shaped, with the vertex of the body cone extending inwardly in opposed relation to the ram cone.Type: GrantFiled: April 8, 2002Date of Patent: December 9, 2003Assignee: Cold Injection Molding, L.T.D.Inventor: Keith A. Smith
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Patent number: 6659755Abstract: This dough shaping machine includes, carried by a frame (12), a station (20) for rolling out dough, a station for rolling up the rolled out dough, a station for shaping the rolled up dough by stretching it and at least one conveyor (14, 16) for transferring the dough from the rolling out station (20) to the rolling up station (24) and the shaping station. Each conveyor (14, 16) constitutes a unitary assembly structurally separate from the frame (12) and is mounted on the latter through removable fixing members (130, 132).Type: GrantFiled: October 16, 1998Date of Patent: December 9, 2003Assignee: Electrolux BakingInventors: Daniel Bonnet, François Garcia, Frédéric Bernhard
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Patent number: 6659756Abstract: A process and apparatus for making densified glass fiber pellets substantially encapsulated in a polymeric shell from chopped segments of multi-filament glass strand is described. The densified pellets may be advantageously produced by hydrating chopped glass strands and then pelletizing them by tumbling in a rotary drum, densifying the resulting pellets by tumbling in a rotating zig-zag or undulating tube, drying the pellets and encapsulating them in a polymeric composition. The resulting pellets exhibit enhanced degradation resistance during bulk storage and handling.Type: GrantFiled: November 13, 2001Date of Patent: December 9, 2003Assignee: Owens Corning Fiberglas Technology, Inc.Inventors: Michael A. Strait, Homer G. Hill, Robert A. Schweizer, Stephen Seng, Leonard J. Adzima
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Patent number: 6659757Abstract: A valve for controlling the flow of a high pressure fluid is provided. The valve provides a reliable way of controlling the flow of high pressure fluids in applications requiring multiple cycles where equipment may be exposed to environmentally harsh conditions, such as high temperatures and pressures.Type: GrantFiled: March 28, 2003Date of Patent: December 9, 2003Assignee: Trexel, Inc.Inventors: Roland Y. Kim, Theodore A. Burnham
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Patent number: 6659758Abstract: A twin sheet forming system and method is used to form a hollow article, such as an automotive fuel tank, from first and second sheets of thermoplastic material. The system includes first and second loading stations, first and second heating stations, and first and second thermoforming stations in an in-line arrangement. The in-line arrangement allows the sheets to be transferred independently between the stations and the separate thermoforming stations allows the sheets to be thermoformed independently. Each of the thermoforming stations includes an upper and lower platen generally in a side by side arrangement for supporting thermoforming tools and plug assists. After heating, the sheets are independently transferred to the thermoforming stations and formed using the thermoforming tools and plug assists. The thermoforming tool and thermoformed piece in one of the thermoforming stations is then transferred to the other station, and the thermoformed pieces are fused together.Type: GrantFiled: January 31, 2002Date of Patent: December 9, 2003Inventors: Lars O. Ekendahl, Georg Posch, Rudolf Landsteiner
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Patent number: 6659759Abstract: A sheet used as a spacer layer is made of photo-curing organic material and thermoplastic organic material, a stamper is pressed on the sheet, and light irradiating is performed after the stamper is stripped.Type: GrantFiled: February 27, 2002Date of Patent: December 9, 2003Assignee: Hitachi, Ltd.Inventors: Yumiko Anzai, Motoyasu Terao
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Patent number: 6659760Abstract: A plastic injection molding machine includes a rod having an end engaged with a slide member located beside the lower mold, and a position block connected to the upper mold. A pin is movably inserted in two respective inclined holes in the position block and the slide member so that the threaded section on the tip end of the rod is moved into the cavity with the movement of the slide member. The rod is located between two side members each have a threaded semi-circular recess. Another threaded section has the same threads of the thread section on the tip end of the rod is engaged with the two threaded semi-circular recesses so that the rod is rotatably withdrawn from the cavity smoothly when the rod is rotated by a motor.Type: GrantFiled: August 10, 2001Date of Patent: December 9, 2003Assignee: Taiwan Green Point Enterprise Co., Ltd.Inventors: Hsueh-Hsin Liao, Chung-Ming Hung
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Patent number: 6659761Abstract: A slider mechanism (1) for an injection mould comprising a core (5) which is insertable into a cavity (20) defined by mould halves (12) of the mould. The slider mechanism (1) has a body (2) which supports the core (5). The invention is characterised by a drive device (3), and a connection (4) between said body (2) and said drive device (3). The connection (4) is adapted to convert a rotary motion of the drive device (3) into a translational motion of the body (2). The invention also concerns an injection mould comprising such a slider mechanism as well as the actual slider.Type: GrantFiled: January 3, 2002Date of Patent: December 9, 2003Assignee: Nolato ABInventor: Lars Persson
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Patent number: 6659762Abstract: An oxy-fuel burner generates a long, luminous, stable and adjustable flame temperature profile flame by incorporating separate, fuel and oxygen jets oriented in a unique geometry. In one preferred embodiment, the fuel is injected horizontally at medium injection velocity (50-200 m/s) while primary oxygen is injected underneath the fuel jet at supersonic velocity (300-500 m/s). The supersonic velocity oxygen jet (20 to 50% required for stoichiometric combustion) entrains fuel and furnaces gases in it's core for the primary flame development over the furnace load. The subsequent mixing of the fuel, primary oxygen and entrained furnace gases establish a low NOx, stable, long and luminous primary flame. The secondary oxidant, preferably air or low purity oxygen (50 to 80% of stoichiometric needs), is injected above the flame using one or more oxygen jets to create an oxy-fuel flame with adjustable flame characteristics.Type: GrantFiled: September 17, 2001Date of Patent: December 9, 2003Assignees: L'Air Liquide - Societe Anonyme a' Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedes Georges Claude, American Air LiquideInventors: Harley A. Borders, Mahendra L. Joshi, Eric Streicher, Thierry Legiret
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Patent number: 6659763Abstract: A lighter includes a housing a housing that forms a fuel reservoir. The housing has a fuel outlet extending from the housing. A valve assembly controls the flow of fuel exiting from the fuel outlet. A flint is mounted on the exterior of the housing for lighting fuel released from the fuel reservoir. A flint actuator includes a spark disk to engage the flint and a driver disk fixedly connected to the spark disk. A third disk is disposed between the driver disk and the spark disk and is freely rotatable therebetween. The third disk has a diameter greater than the driver disk. A plate is disposed between the driver disk and the housing and has a radially outwardly protruding portion between the housing and the driver disk, which is aligned with the driver disk and extends radially outwardly a greater distance than the driver disk from a central axis of the housing.Type: GrantFiled: December 12, 2001Date of Patent: December 9, 2003Assignee: OneWorld Enterprises LimitedInventor: Gary A. Fisher
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Patent number: 6659764Abstract: A palm actuation lighter includes two elongated actuation arms having two opposed outer side gripping surfaces respectively wherein a piezoelectric unit is positioned between the side gripping surfaces. The actuation arms are arranged to compress the piezoelectric unit by a compression force applied on the side gripping surfaces so as to ignite the palm actuation lighter. Therefore, the actuation arms function as a physical barrier to prevent a hand of a child from compressing the piezoelectric unit while an adult is able to compress the actuation arms by using at least two fingers and a thumb of the adult on the side gripping surfaces respectively so as to ignite the palm actuation lighter.Type: GrantFiled: July 16, 2002Date of Patent: December 9, 2003Assignee: Zreative Products Inc.Inventor: Wen Xu
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Patent number: 6659765Abstract: An infrared rays gas burner comprises a main member having a box which has a base seat and a cover, two non-asbestos pads, ceramic planks and guiding device. The non-asbestos pads is mounted the base seat and the ceramic planks rests on the non-asbestos pad and the cover is secured to the base seat with stop portions thereon against the ceramic plank. A gas mixing tube, which works as a Venturi tube, is mounted on the base seat to inject gas into the base seat. The guiding device is mounted in the base seat, which has guiding portions and outlets thereon for spreading the gas injected from the gas mixing tube in the base seat equally.Type: GrantFiled: December 18, 2002Date of Patent: December 9, 2003Assignee: Seven Universe Industrial Co., Ltd.Inventor: Wu Sen-Yu
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Patent number: 6659766Abstract: Self ligating orthodontic brackets include a bracket base and a ligation cover which interacts with the base in order to provide ligation of at least one arch wire associated with the base. The orthodontic brackets may include one or more of the following improved features: (1) a film hinge about which a ligation cover may rotate; (2) a bearing spring or other flexible feature associated with the ligation cover to provide active ligation; (3) a ligation cover that has sufficient flexibility and resilience to facilitate locking and unlocking relative to the base; (4) a spring or spring-like feature that provides resistance to rotation of the ligation cover relative to the base; (5) a bracket base and ligation cover formed from different types of plastic materials; (6) two or more initially open arch wire slots that can be ligated by a single ligation cover; or (7) a safety locking feature that holds the ligation cover more tightly to the bracket in response to increased arch wire pressure.Type: GrantFiled: September 12, 2001Date of Patent: December 9, 2003Inventors: Norbert Abels, Claus H. Backes
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Patent number: 6659767Abstract: Self ligating orthodontic brackets include a bracket base and a ligation cover which interacts with the base in order to provide ligation of at least one arch wire associated with the base. The orthodontic brackets may include one or more of the following improved features: (1) a film hinge about which a ligation cover may rotate; (2) a bearing spring or other flexible feature associated with the ligation cover to provide active ligation; (3) a ligation cover that has sufficient flexibility and resilience to facilitate locking and unlocking relative to the base; (4) a spring or spring-like feature that provides resistance to rotation of the ligation cover relative to the base; (5) a bracket base and ligation cover formed from different types of plastic materials; (6) two or more initially open arch wire slots that can be ligated by a single ligation cover; or (7) a safety locking feature that holds the ligation cover more tightly to the bracket in response to increased arch wire pressure.Type: GrantFiled: September 12, 2001Date of Patent: December 9, 2003Inventors: Norbert Abels, Claus H. Backes
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Patent number: 6659768Abstract: A waste liquid tank B is connected to a cleaning head 60 through a waste tube 25. Squeezing means 61 is provided in a waste flow passage of from an end 60a of the cleaning head 60 to a suction port b of the waste liquid tank B to squeeze the waste flow passage. A pump A is driven with a cleaning head 60 introduced in the oral cavity to suck the residual matter in the oral cavity and to drain it into the waste liquid tank B in order to clean the oral cavity. When the residual matter cannot be sucked with a normal suction force, the waste flow passage is squeezed by the squeezing means 61 to increase the negative pressure in the waste tube 25. Thereafter, the squeeze is released to suck the residual matter at a breath with the increased negative pressure.Type: GrantFiled: April 24, 2001Date of Patent: December 9, 2003Assignee: Ricoh Elemex CorporationInventors: Kazumasa Ito, Hiroshi Ikeda, Shin Yamazaki
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Patent number: 6659769Abstract: A bone spreader for preparing a site for dental prosthesis implantation consists of a relatively flat, wide, blade component and a longitudinal ridge component centrally disposed on one side of the blade component. Penetration of the instrument effects spreading of cortical bone tissue and produces a recess that includes a groove portion within which the root element of a dental implant can be accommodated.Type: GrantFiled: January 25, 2002Date of Patent: December 9, 2003Inventor: Dennis Flanagan