Forming Helical Or Threaded Product Patents (Class 249/59)
  • Patent number: 11318660
    Abstract: Tooling for use in forming a variable taper component is provided. The tooling includes an inner mandrel and an outer mandrel disposed around the inner mandrel. The inner mandrel includes a master insert defining opposed tapered edge faces, an external surface having a variable taper and a plurality of recesses configured to receive at least a portion of the variable taper component, and a tapered internal surface. The inner mandrel also includes a plurality of interlocking pieces arranged concentrically around the master insert, and a tapered inner sleeve disposed against the tapered internal surfaces of the plurality of interlocking pieces and the master insert. The outer mandrel defines a corresponding plurality of recesses configured to receive at least a portion of the variable taper component, wherein a maximum width of the interlocking pieces and the master insert is smaller than a minimum width of ends of the variable taper component.
    Type: Grant
    Filed: November 13, 2019
    Date of Patent: May 3, 2022
    Assignee: Ford Global Technologies, LLC
    Inventors: David Anthony Wagner, Jeff Michael Hatt, Gerald J. Heath
  • Patent number: 10974872
    Abstract: A method and an apparatus form aluminium screw capsules with a safety ring made of synthetic plastics for tamperproof closing of containers. An aluminium capsule body is inserted into a moulding cavity of a mould conformed and arranged for the overmoulding of a safety ring on an edge of an annular wall of the capsule body. An annular sealing zone is defined for the synthetic plastic material between a first surface of the capsule body and a mould first portion inserted into the central cavity of the capsule body to form a safety ring anchored to the capsule body.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: April 13, 2021
    Inventor: Danilo Albonetti
  • Patent number: 10953580
    Abstract: In order to provide a sprue-bush which is capable of suitably cooling a melt raw resin in a raw resin-flow path as a whole, there is provided a sprue-bush, comprising a raw resin-flow path and a cooling medium-flow path located around the raw resin-flow path, wherein a width dimension of the raw-resin flow path gradually becomes larger toward a downstream side-end surface of the sprue-bush, and wherein the downstream side-end surface of the sprue-bush is a heat transfer surface.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: March 23, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Shinya Watanabe, Satoshi Abe, Kenichi Tanaka, Mikio Mori, Yoshiyuki Uchinono
  • Patent number: 10869983
    Abstract: An angular interlock for a swivel feature formed using injection molding techniques is described herein. In one exemplary embodiment, the swivel feature is used for a conduit for delivering breathing therapy to a patient, and includes an outer swivel component and an inner swivel component formed using a two-shot molding technique. The outer swivel component is formed first out of a material, such as polycarbonate, having a low shrink rate, whereas the inner swivel component is formed of a material, such as polypropylene, having a high shrink rate. The material for the inner swivel component is injected into the formed outer swivel component and allowed to cool, creating a clearance. The outer swivel component includes an angular interlock protrusion that allows the inner swivel component to be formed without creating an interface about the angular interlock protrusion, which typically occurs with standard rectangular interlocks.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: December 22, 2020
    Assignee: Koninklijke Philips N.V.
    Inventor: Richard Thomas Haibach
  • Patent number: 10843424
    Abstract: An injection molded lens, to which the hot runner according to an embodiment of the present invention includes: a primary sprue; a primary runner which has a central portion connected to the primary sprue and an extension portion extending radially from the central portion; a secondary sprue of which one end is connected to the extension portion of the primary runner; a secondary runner which has a top thereof connected to the other end of the secondary sprue, has an annular shape and a thin plate shape, and has a plurality of protrusions formed on an outer circumference thereof; a plurality of gates which are connected to ends of the plurality of protrusions of the secondary runner; and a plurality of cavities connected to the plurality of gates.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: November 24, 2020
    Assignee: FOUNDATION FOR RESEARCH AND BUSINESS, SEOUL NATIONAL UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventor: Keun Park
  • Patent number: 10647041
    Abstract: A threaded mold decoupling system includes at least one unscrewing assembly configured to remove a molded article a threaded core of an injection mold, an elevator assembly, and a driving element disposed in operative communication with the at least one unscrewing assembly and with the elevator assembly. The driving element is configured to actuate the at least one unscrewing assembly to rotate a molded article about a longitudinal axis of the threaded core and actuate the elevator assembly to linearly translate the molded article along the longitudinal axis of the threaded core.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: May 12, 2020
    Assignee: NyproMold Inc.
    Inventor: Tuan H. Nguyen
  • Patent number: 10617780
    Abstract: A cleaning device for LADs, and other such threaded devices, comprising a cap and a cleaning agent. The cap comprises a casing having an opening to an interior cavity. A threaded coupling mechanism is located on the inner surface of the casing proximate the opening. The coupling mechanism has retention features that provide localized pressure points on the threads of the LAD to accommodate thread variance and reduce the chance of premature disengagement.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: April 14, 2020
    Assignee: 3M Innovative Properties Company
    Inventors: Alan R. Dombrowski, Timothy C. McFarland, John C. Detloff
  • Patent number: 10495842
    Abstract: A lens barrel includes a holding cylinder configured to hold an optical system, a cam cylinder, and a driving unit. At least part of each of the plurality of rotating members except the first rotating member is located inside an inner diameter of the cam cylinder and on an object side of an end of the cam cylinder on an image pickup surface side. The second rotating member is located closest to the object among the plurality of rotating members except the first rotating member, and on a rotating direction side of the cam cylinder where the cam cylinder moves to the object side relative to the first rotating member.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: December 3, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Daisuke Shiraishi
  • Patent number: 10272599
    Abstract: A mold can form a one-piece container closure by injection molding. The closure may have a base portion that inwardly defines an opening centered about a base portion longitudinal axis and a hinged cap that is linked to the base portion by an outside hinge member. The hinge member may have two opposite ends that are respectively connected to the base portion and the cap, thus defining an elongated hinge member therebetween. A mold may include two parts which respectively define two internal cavities facing each other along a longitudinal axis of alignment that coincides with the base portion longitudinal axis. The two mold parts my be movable along the longitudinal axis of alignment between a closed position where they define together a mold jointing plane and an open position where they are spaced apart from each other for demolding the closure.
    Type: Grant
    Filed: May 5, 2016
    Date of Patent: April 30, 2019
    Assignee: Nestec S.A.
    Inventor: Jean-Paul Cerveny
  • Patent number: 10226887
    Abstract: The mold apparatus (1) includes: the stationary mold (12) of the mold main body (2) that molds the main body part (81); the rotary core (20) that molds the undercut part (82) and mold releases by rotationally moving in a direction separating from the undercut part (82); and the restricting core (40) that restricts movement of the rotary core (20) sandwiching between the stationary mold (12) and rotary core (20) during molding, and releases restriction of the rotary core (20) by moving in a direction exiting from between the stationary mold (12) and rotary core (20) during mold release of the rotary core (20) from the undercut part (82).
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: March 12, 2019
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Tomoyuki Uchi, Hiroshi Matsushima, Takashi Abe
  • Patent number: 10213945
    Abstract: A threaded mold decoupling system includes at least one unscrewing assembly rotatably coupled to a mounting plate and disposed in proximity to a threaded core of an injection mold, an elevator assembly having a first elevator element rotatably coupled to the mounting plate and a second elevator element connected to a fixed plate, the fixed plate opposing the mounting plate, and a driving assembly disposed in operative communication with the at least one unscrewing assembly and with the first elevator element of the elevator assembly. The driving assembly is configured to actuate the at least one unscrewing assembly to rotate a molded article about a longitudinal axis of the threaded core and actuate the first elevator element relative to the second elevator element to linearly translate the mounting plate relative to the fixed plate and to translate the molded article along the longitudinal axis of the threaded core.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: February 26, 2019
    Assignee: NYPROMOLD, INC.
    Inventor: Tuan H. Nguyen
  • Patent number: 10207946
    Abstract: An optical element molding mold set includes a first mold and a second mold that are opposite to each other, and a third mold that is located on an outer periphery of a cavity between the first mold and the second mold, and an inner peripheral surface of the third mold has different friction coefficients between one side and another side in an opposite direction of the first mold and the second mold.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: February 19, 2019
    Assignee: OLYMPUS CORPORATION
    Inventor: Norio Nakaya
  • Patent number: 10102931
    Abstract: A connecting device including a nut, a screw, a body having a bore for screwing the screw to the nut through the bore with the screw abutting an abutment surface of the body, a screw locking device for preventing loosening of the screw. According to one aspect of the invention, the locking device is adapted for axially retaining the screw into the body after unscrewing the screw.
    Type: Grant
    Filed: September 14, 2009
    Date of Patent: October 16, 2018
    Assignee: AREVA NP
    Inventors: Erhard Friedrich, Gregor Munsterjohann, Bernd Block
  • Patent number: 9925705
    Abstract: Fixed side molding dies are removed from fixed side molding dies insertion hole portions in accordance with the disconnection in the connection/disconnection while maintaining a contact state that a second transfer portion is in contact with a portion other than a fixed side optical functional surface of each molded article at the time of mold opening of a fixed die and a movable die. Thereby a first transfer portion is released from the fixed side optical functional surface.
    Type: Grant
    Filed: August 13, 2014
    Date of Patent: March 27, 2018
    Assignee: Olympus Corporation
    Inventor: Yoshitaka Otsuka
  • Patent number: 9498906
    Abstract: A mold head assembly and associated method maintains a lid in a closed position relative to a cap body while a molded cap assembly is removed from a threaded core in a mold cavity. The mold head assembly includes a first member, a second member configured for receipt opposite the associated mold cap assembly and mounted to the first member for limited relative movement therebetween, and a biasing member interposed between the first and second members for urging the second member toward the mold cavity. Particularly, a compliant head assembly engages the molded cap or lid and biasing springs urge a plate, the lid, and the cap base toward the mold cavity in a direction generally opposite that of the motion of a stripping sleeve relative to a thread core.
    Type: Grant
    Filed: January 9, 2014
    Date of Patent: November 22, 2016
    Assignee: CREATIVE EDGE DESIGN GROUP LTD.
    Inventors: Gregory M. Soehnlen, Daniel P. Soehnlen, William R. Soehnlen
  • Patent number: 8944796
    Abstract: A method of forming a mesh by a molding a link element around other link elements to form a mesh in which the interlinking link elements are formed as continuous unjoined loops by a molding process. An apparatus for forming a mesh including a plurality of first cavities for accommodating first link elements and a plurality of second cavities for forming interlinking link elements. The method and apparatus allow the continuous production of mesh formed of a range of materials including plastics materials.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: February 3, 2015
    Assignee: Kaynemaile Limited
    Inventor: Kayne Bruce Horsham
  • Patent number: 8926312
    Abstract: A detachable threaded rod is used in an injection mold, and includes an operation portion, a molding portion, and a screw. The operation portion includes a rod part, the rod part defines a mating hole and a screw hole on a bottom surface of the mating hole. The molding portion includes a front end, a rear end, and a side surface connected between the front end and the rear end. The molding portion defines a cavity on a front end. The molding portion includes a mating portion extending from the rear end and received in the mating hole. The mating portion defines a through hole communicating with the cavity. The molding portion defines external threads on the side surface. The screw penetrates the through hole and screwing in the screw hole, the operation portion is fixed with the molding portion by the screw.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: January 6, 2015
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Min-Tsang Tseng
  • Publication number: 20140232042
    Abstract: Composite fasteners have a high fraction of discontinuous, randomly oriented reinforcing fibers. A charge of thermoplastic fiber flakes are heated to melting temperature within a reservoir, flowed into multiple mold cavities and compression molded. The molded fasteners have high strength, exhibit quasi-isotropic properties and may be produced in high volume.
    Type: Application
    Filed: February 21, 2013
    Publication date: August 21, 2014
    Applicant: THE BOEING COMPANY
    Inventor: THE BOEING COMPANY
  • Patent number: 8702394
    Abstract: An air boost device such as a turbocharger, wherein the compressor wheel thereof is re-designed to permit die inserts (20), which occupy the air passage and define the blades (4, 5) during a process of forming a wax pattern (21) of a compressor wheel, to be pulled without being impeded by the blades. This modified blade design enables the automated production of wax patterns (21) using simplified tooling. The compressor wheel improves low cycle fatigue, withstands high temperatures and temperature changes, and permits operation at high boost pressure ratio while, on the other hand, having low weight, low inertial drag, and high responsiveness.
    Type: Grant
    Filed: January 24, 2008
    Date of Patent: April 22, 2014
    Assignee: BorgWarner, Inc.
    Inventors: David Decker, Stephen I. Roby
  • Publication number: 20140021653
    Abstract: A mold block includes a tool body with a contoured finished surface adapted to receive a tool insert having a forming surface for forming a bottle neck in a molding operation. The tool body defines an internal channel for heat transfer with the forming surface. At least a portion of the channel is offset generally equidistant from the finished surface to provide a path contoured for conformal cooling of the insert. The tool body has a pair of ports intersecting the channel. Several methods for forming a mold block are disclosed and include machining a contoured finished surface adapted to receive a tool insert on a tool body, forming a heat transfer channel within the tool body, and forming a pair of ports into the tool body. At least a portion of the channel is offset generally equidistant from the finished surface for conformal cooling of the insert.
    Type: Application
    Filed: February 26, 2010
    Publication date: January 23, 2014
    Applicant: FLOODCOOLING TECHNOLOGIES, LLC
    Inventors: John E. Nemazi, Mark Manuel, Matthew T. Lowney
  • Patent number: 8555742
    Abstract: The invention involves a gearbox, especially for adjustment devices in motor vehicles, with a plastic worm drive. The invention provides that the worm drive has an encircling, circular flat contact surface perpendicular to the worm axle and a number of removal pockets in the form of recesses that are interposed axially between contact surface and the worm axle and at the same time arranged in a level recessed to the level of contact surface, whereby an encircling bevel is formed in the transition area from level of removal pockets to the level of the circular contact surface.
    Type: Grant
    Filed: September 1, 2006
    Date of Patent: October 15, 2013
    Assignee: IMS Gear GmbH
    Inventors: Stefan Hoch, Stéphane Birker, Michael Woehrle
  • Patent number: 8419992
    Abstract: This invention provides a mold for a gasket, which can render the planar shape of a mold for integral molding of a large-diameter gasket as small as possible to reduce the size of the manufacturing equipment and, at the same time, by virtue of integral molding, does not require labor and time in the manufacture thereof and does not cause a lack of strength in the connecting part. To this end, a mold (1) for molding an endless-type gasket comprises a plurality of molding parts (11,21), formed by disposing two molding grooves (12, 22), in a spiral wound form, in parallel so as to be adjacent to each other. The spiral wound molding grooves (12, 22) have reversing parts (14, 24) in their respective inner ends (13, 23), and, at the same time, their outer ends (15, 25) are connected to each other in a rope form.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: April 16, 2013
    Assignee: NOK Corporation
    Inventors: Kazuyuki Asai, Daihachi Shojima, Kenta Kohatsu
  • Patent number: 8398392
    Abstract: There is provided a neck ring for defining at least a portion of a neck portion of a preform. The neck ring comprises a body having: mounting flange and a molding face, the molding face including a venting structure, the venting structure having: (i) a plurality of air vent grooves for collecting and venting, in use, excess air from a molding cavity as it is being filled with the molding material, and (ii) an air collector groove in fluid communication with the plurality of air vent grooves for providing an evacuation path for the air to be vented from the plurality of air vent grooves.
    Type: Grant
    Filed: January 13, 2011
    Date of Patent: March 19, 2013
    Assignee: Husky Injection Molding Systems Ltd.
    Inventors: Peter Yankov, Scott Michael Stedman, Domenico Favata
  • Patent number: 8397791
    Abstract: A mold for molding a green body for manufacturing a zirconium oxide dental implant includes a first molding part and a second molding part. The first and second molding parts each has a first imprinting inner surface and two none-thread inner surfaces for forming the external of the green body with two external thread sections and two none-thread sections. The mold may also include a driving mechanism, a polygonal conical slider and a screw thread forming rod. The polygonal conical slider can be driven for axially sliding into the mold cavity without rotation. The screw thread forming rod is coaxially and slidably penetrated the polygonal conical slider and driven by the driving mechanism for screwing into the mold cavity and unscrewing out of the mold cavity thereby forming the inner of the green body with an internal thread and a polygonal tapering section.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: March 19, 2013
    Assignee: National Kaohsiung University of Applied Sciences
    Inventors: Min-Wen Wang, Chia-Wei Yu
  • Patent number: 8247048
    Abstract: An injection mold 70 includes a first portion 71, a second portion 72, a third portion 73, and a fourth portion 79. The first portion 71 has three high-density regions H in which there is the highest proportion of the axial direction dimension accounted for by the portion corresponding to cam grooves with respect to the axial direction dimension of a cavity 71a. First gates 74b are disposed at locations corresponding to the high-density regions H, or closer to the high-density regions H than second gates 75b. The average channel sectional area of first runners 74a is larger than the average channel sectional area of second runners 75a.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: August 21, 2012
    Assignee: Panasonic Corporation
    Inventors: Makoto Iyoda, Suguru Nakao, Shouichi Irie
  • Patent number: 8042247
    Abstract: A tool for use in a powder metal process is disclosed. The tool includes an upper tool and a lower tool. The upper and lower tools may include multiple members for each tool. The lower tool having a predetermined cross sectional profile that continuously expands outward from or near a center point of the lower tool. The lower tool is also secured within a press for the powder metal process via a fastening mechanism.
    Type: Grant
    Filed: June 11, 2008
    Date of Patent: October 25, 2011
    Assignee: GKN Sinter Metals, Inc.
    Inventors: Michael A. Dunkle, Jude D. Schlimm
  • Patent number: 7922958
    Abstract: A syringe and detachable needle assembly having binary attachment features include an elongate syringe barrel having a longitudinal axis, an open proximal end and an open distal end including a collar. The collar includes the cylindrically shaped sidewall having an inside surface and an outside surface. A needle assembly includes the hub having a body portion including a proximal end, a distal end and a conduit therethrough. A cannula having a distal end, a proximal end and a lumen therethrough is attached to the distal end of the hub so that the lumen is in fluid communication with the chamber. A lug is provided on one of the collar and the hub and a ramp and a rest surface is provided on the other of the collar and the hub. The ramp is oriented at an acute angle with respect to longitudinal axis for guiding the lug during needle assembly attachment, to the rest surface forcing the hub to contact the barrel to form a seal the hub and the barrel.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: April 12, 2011
    Assignee: Becton, Dickinson and Company
    Inventors: Christina Joy D'Arrigo, Eric Schiller, Anthony Economou
  • Publication number: 20080181602
    Abstract: A drive frame 34 serving as a cylindrical molded article includes a drive frame main body 34a, three first cam grooves 34c, three second cam grooves 34d, three first gate portions 84b, and three high-density regions H. The first gate portions are formed at the end of the cylindrical portion, and are vestiges of gates in injection molding. The high-density regions H are regions in which there is the highest proportion of the axial direction dimension accounted for by the first cam grooves 34c and the second cam grooves 34d with respect to the axial direction dimension of the drive frame main body 34a. The first gate portions 84b are disposed at a location closer to one of two adjacent high-density regions than the other in the circumferential direction of the two adjacent high-density regions H.
    Type: Application
    Filed: January 29, 2008
    Publication date: July 31, 2008
    Inventors: Makoto IYODA, Suguru Nakao
  • Patent number: 7393194
    Abstract: A tool for use in a powder metal process is disclosed. The tool includes an upper tool and a lower tool. The upper and lower tools may include multiple members for each tool. The lower tool having a predetermined cross sectional profile that continuously expands outward from or near a center point of the lower tool. The lower tool is also secured within a press for the powder metal process via a fastening mechanism.
    Type: Grant
    Filed: April 26, 2005
    Date of Patent: July 1, 2008
    Assignee: GKN Sinter Metals, Inc.
    Inventors: Michael A. Dunkle, Jude D. Schlimm
  • Patent number: 7306759
    Abstract: A mold for producing a product with internal flutes is provided. The mold includes a mold body that defines a cavity and a shaft in proximity to the cavity. A pin assembly is receivably engaged in the shaft of the mold body. The pin assembly includes a pin with a grooved portion that has at least one helically shaped groove, a sleeve surroundingly disposed about a portion of the pin, and means to allow rotation of the pin. A gap is defined in between a portion of the walls of the shaft of the mold body and the grooved portion of the pin and the gap is partially terminated by a portion of the sleeve. A method of molding is also provided.
    Type: Grant
    Filed: October 24, 2002
    Date of Patent: December 11, 2007
    Inventors: Donald W. Venus, James Skufca
  • Patent number: 7216842
    Abstract: A pocket former includes an outer barrel having a first rim, a second rim and a frustoconical body portion extending from the first rim to the second rim. A center barrel is connected to the outer barrel and has a proximal lip adjacent the first rim of the outer barrel, a distal lip adjacent the second rim of the outer barrel, and a tubular body portion extending from the proximal lip to the distal lip, and extends beyond both the first rim and the second rim. An annular flange curves out and away from the second rim of the outer barrel. A spiral surface is located on the frustoconical body portion of the outer barrel. A nut surface is located on the tubular body portion of the center barrel adjacent the distal lip.
    Type: Grant
    Filed: August 12, 2004
    Date of Patent: May 15, 2007
    Assignee: Lomont Molding, Inc.
    Inventor: Virgil Allen Watson
  • Patent number: 7157037
    Abstract: A Bi-directional rack assembly that rotates one column of threaded cores and unscrews threaded closures while moving in the forward direction. The Bi-directional rack then mechanically changes position to engage an adjacent column of rotating threaded cores and at the end of a second molding cycle rotates the threaded cores and unscrew threaded closures while moving in the reverse (reset) direction. A set of timed-advance devices are engaged by a smaller pinion gear and idler gear assemblies to the Bi-directional rack and as the Timed-Advance devices are activated, they allow pneumatic pistons to advance the stripper plate in time with the threaded closures as they are being unscrewed from the threaded cores. A second “rapid advance” pneumatic piston eliminates the need for an external rapid rise camming feature. A rotating core comprising a stock, rotating core, a stock water-seal insert and a custom core top.
    Type: Grant
    Filed: December 20, 2004
    Date of Patent: January 2, 2007
    Assignee: Creating Mold Solutions, Inc.
    Inventors: Gerald Seidelman, Albert Bruce Chalcraft
  • Patent number: 6848887
    Abstract: Disclosed is a turbofan which includes a hub coupled with a rotational shaft of a driving device, a plurality of blades installed at a circumference of the hub radially, and a shroud at an opposite side to the hub so as to be coupled with a plurality of the blades wherein the blades are placed between the shroud and the hub, and wherein the hub, blades, and shroud are formed in one body and wherein the shroud comprises a first extension protruding to extend from a coupling part with a leading edge of each of the blades in an inward radial direction of the rotational shaft and a second extension extending straightly from the first extension in a direction of the rotational axis toward a side opposite to the hub.
    Type: Grant
    Filed: January 11, 2002
    Date of Patent: February 1, 2005
    Assignee: LG Electronics Inc.
    Inventor: Seong Chun Kim
  • Patent number: 6767494
    Abstract: A plunger rod for a syringe in is of integrally injection molded plastic construction having an elongated body with a coaxial end portion. An external thread extends around the end portion for threaded receipt into a plunger tip that is slidably received in a syringe barrel. A flat extends chordally across the end portion of the rod body interrupting the external thread. The plastic, of which the plunger rod is molded, is gated into the mold for the plunger rod at the flat that extends across the rod end portion, leaving a gate mark or vestige on the flat. Gating of the plastic material into the portion of the mold that forms the threaded end portion of the plunger rod achieves improved flow and improved filling of the external thread, while employing a simple and economical mold construction. The gate vestige does not interfere with threading of the plunger rod end portion into the plunger tip.
    Type: Grant
    Filed: September 6, 2002
    Date of Patent: July 27, 2004
    Assignee: Owens-Illinois Closure Inc.
    Inventor: Philip J. Robinson
  • Patent number: 6761346
    Abstract: A mold for a plastic grip of a portable tool has two halves with depressions forming the negative. The base body has a top grip extending, when mounted, across the topside of the housing perpendicularly to a longitudinal axis of the tool and a lateral grip connected to the top grip extending therefrom, when mounted, laterally downwardly. The top grip has a first end and the lateral grip has a second end for connecting to the housing. Top and lateral grips have identical elliptical cross-sections rotated to one another in the circumferential direction of the grip by an angle of rotation. Cross-sections have a first diameter larger than a second diameter. Mold depressions have recesses for molding elongate, raised portions in the longitudinal direction. Recesses are adjacent circumferentially and extend spirally. Separation surfaces of mold halves are positioned in a longitudinal center plane of a recess adjacent the first diameter.
    Type: Grant
    Filed: August 2, 1999
    Date of Patent: July 13, 2004
    Assignee: Andreas Stihl AG & Co.
    Inventors: Günter Wolf, Manfred Thais
  • Patent number: 6736628
    Abstract: A device for manufacturing, in particular, plastic caps for closing containers, comprising molding units, each of which is composed of a male mold part and of a female mold part. The male mold part has a punch which is directly provided with compressed air which exits through ports, so as to cause the separation of the cap from the punch and facilitate the removal of the cap.
    Type: Grant
    Filed: January 27, 2000
    Date of Patent: May 18, 2004
    Assignee: Sacmi Cooperativa Meccanici Imola S.c.r.l.
    Inventor: Zeno Zuffa
  • Patent number: 6682336
    Abstract: A helical gear is disclosed that is formed by an injection molding process in which the mold cavity is formed of mirror finished hardened stainless steel. The helical gear is disclosed in a gear box that entirely encase the gears, and may be integral with the housing of the toy. Furthermore, an “L” axle for gears is disclosed that provides a straight shaft portion that extends through the axle bearing aligned with the centerline of the gear and a bent portion that is seated in a slot recess in the wall of the gear box.
    Type: Grant
    Filed: November 16, 2000
    Date of Patent: January 27, 2004
    Assignee: New Bright Industrial Co., Ltd.
    Inventor: Keung Lee
  • Patent number: 6663347
    Abstract: A compressor wheel is re-designed to permit die inserts (20), which occupy the air passage and define the blades (4, 5) during a process of forming a wax pattern (21) of a compressor wheel, to be pulled without being impeded by the blades. This modified blade design enables the automated production of wax patterns (21) using simplified tooling. These wax patterns (21) can be used in a large-scale investment casting process, and produce an economical cast titanium compressor wheel which performs aerodynamically at high boost pressure/RPM. The compressor wheel improves low cycle fatigue, withstands high temperatures and temperature changes, and permits operation at high boost pressure ratio while, on the other hand, having low weight, low inertial drag, and high responsiveness.
    Type: Grant
    Filed: June 6, 2001
    Date of Patent: December 16, 2003
    Assignee: BorgWarner, Inc.
    Inventors: David Decker, Steven Roby
  • Patent number: 6663810
    Abstract: A helical gear is disclosed that is formed by an injection molding process in which the mold cavity is formed of mirror finished hardened stainless steel. The helical gear is disclosed in a gear box that entirely encase the gears, and may be integral with the housing of the toy. Furthermore, an “L” axle for gears is disclosed that provides a straight shaft portion that extends through the axle bearing aligned with the centerline of the gear and a bent portion that is seated in a slot recess in the wall of the gear box.
    Type: Grant
    Filed: November 16, 2000
    Date of Patent: December 16, 2003
    Assignee: New Bright Industrial Co., Ltd.
    Inventor: Keung Lee
  • Patent number: 6623265
    Abstract: A mold for the manufacture of a fan having a hub and a plurality of helical blades extending from the hub. The mold cavity is designed with a specific shape to produce the helical blades of the fan. The mold is comprised of two mold parts. At least one of the mold parts is freely rotatable such that upon separation of the mold parts, the formed fan causes the rotatable mold part to autorotate as it is pulled away from the other mold part.
    Type: Grant
    Filed: March 12, 2001
    Date of Patent: September 23, 2003
    Assignee: Jetfan Technology Limited
    Inventor: Terence Robert Day
  • Patent number: 6609694
    Abstract: A molded closure having an auxiliary thread for removal of an incomplete closure from a molding cavity, the molded closure including a helical auxiliary thread projecting inwardly from a cylindrical wall portion of the closure to provide engagement between the closure and the molding core, so that the closure may be threadably removed from the molding cavity by threadably disengaging the molding core from the molding cavity after an incomplete run of the fabrication process. A molding assembly with which the auxiliary thread may be formed in a molded closure is also provided.
    Type: Grant
    Filed: February 21, 2001
    Date of Patent: August 26, 2003
    Assignee: Rexam Medical Packaging Inc.
    Inventors: James A. Francois, Kerry W. Dodds
  • Patent number: 6592797
    Abstract: The invention generally discloses an apparatus and method for removing threaded, molded articles from an injection mold. A cam system and linear drive/following gear mechanism engages a finely resolved retraction of a threaded mold core, under substantially full mold clamp pressure, prior to rotational disengagement of the core from the molded article. The invention also describes a system for the reduction of galling that may otherwise occur when mold components experience relative rotation with respect to each other. Moreover, the invention describes an apparatus and method for substantially reducing periodic maintenance checks and interruptions in production.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: July 15, 2003
    Assignee: The Tech Group, Inc.
    Inventors: Leonard C. Graham, James D. Wicklund
  • Publication number: 20030075831
    Abstract: A mold for producing a product with internal flutes is provided. The mold includes a mold body that defines a cavity and a shaft in proximity to the cavity. A pin assembly is receivably engaged in the shaft of the mold body. The pin assembly includes a pin with a grooved portion that has at least one helically shaped groove, a sleeve surroundingly disposed about a portion of the pin, and means to allow rotation of the pin. A gap is defined in between a portion of the walls of the shaft of the mold body and the grooved portion of the pin and the gap is partially terminated by a portion of the sleeve. A method of molding is also provided.
    Type: Application
    Filed: October 24, 2002
    Publication date: April 24, 2003
    Inventors: Donald W. Venus, James Skufca
  • Patent number: 6506330
    Abstract: A molding apparatus and method of injection, compression or otherwise molding a closure having projections extending inwardly from a skirt of the closure includes a plurality of slides for movement obliquely with respect to an inner mold core. A ring contacts the closure and surrounds the slides. Movement of the ring relative to the mold core results in the movement of the closure which moves the slides to disengage recesses on the slides. The recesses are used to form the projections on the closure. The ring contacts the closure and advances the closure away from the mold core. The projections seated within the recesses on the slides move the slides obliquely relative to the mold core and ultimately disengage the recesses from the projections thereby releasing the closure from the mold. The movement of the slides is independent from the movement of the ring so that complicated mechanisms for movement of the slides are not required according to this invention.
    Type: Grant
    Filed: May 25, 2000
    Date of Patent: January 14, 2003
    Inventors: Lothar Schweigert, Ui Hwan O
  • Patent number: 6460601
    Abstract: A method of producing internal screw threads, especially in metals or their alloys and preferably in high strength alloys as are used, inter alia, in dental prosthetics, especially employing the casting technique. Initially an externally threaded pin is positioned in a mold cavity at the location in the dental prosthetic article required for the internal thread. The molten metal is cast around this metal pin and, after hardening of the molten metal, is removed to leave an internal screw thread.
    Type: Grant
    Filed: April 13, 2000
    Date of Patent: October 8, 2002
    Assignee: Bredent Dentalgerate U. Materialien Fach- U. Organisationsberatung Peter Brehm
    Inventor: Peter Brehm
  • Patent number: 6426030
    Abstract: A method of making a closure for a container is accomplished by providing a unitary mold with a mold cavity therein having vertically extending ribs and a rotatable and linearly movable threaded core element is received within the cavity. A formable plastic material is placed within the cavity and the core element is received within the cavity. Alternatively, the formable plastic material may be injected into the mold cavity. Upon contacting the formable plastic material with the core element the plastic material is forced around the outer surface of the core element and the inner surface of the cavity forming a closure with an internal thread and externally extending vertical ribs. The closure and the core element are backed out of the cavity wherein the core element is moved linearly and rotatably, but rotation of the closure is prevented.
    Type: Grant
    Filed: November 15, 1999
    Date of Patent: July 30, 2002
    Assignee: Rexam Medical Packaging Inc.
    Inventor: Randall Julian
  • Patent number: 6390800
    Abstract: An apparatus for forming threaded molded parts such as closures for containers having improved means for unthreading the formed part from the mold core. The apparatus includes a cavity part and a core part, the cavity part being rotatable relative to the core part, such that simultaneous rotation of the cavity and opening of the mold results in unthreading of the part from the core. The mold cavity is rotationally coupled to a mold cavity rotator which is preferably driven by means of a rack. The rotation of the mold cavity is timed with the mold opening step such that the threaded part is unthreaded from the core as the mold plates are separated.
    Type: Grant
    Filed: June 1, 2000
    Date of Patent: May 21, 2002
    Assignee: Unique Mould Makers Limited
    Inventors: David R. Brown, Henry J. Rozema
  • Patent number: 6355201
    Abstract: A method for manufacturing a tamper-indicating closure having a plurality of resilient flexible projections bent upwardly and radially inwardly at a predetermined radius of curvature. The first step in the method includes providing a mold assembly comprising a female mold portion for forming the outer surface of the closure and a male mold portion for forming the closure's inner surface and its plurality of projections. The male and female mold portions are arranged for relative movement toward and away from each other between a mold open position and a mold closed position. When in the mold closed position, the male and female mold portions define a mold cavity in which the tamper-indicating closure is molded.
    Type: Grant
    Filed: September 7, 2000
    Date of Patent: March 12, 2002
    Assignee: Captive Plastics, Inc.
    Inventors: Drew H. McNary, William D. Armstrong
  • Patent number: 6247912
    Abstract: A spiral bevel gear having right and left tooth flanks having such a small pitch angle that either right or left ones are not seen in plan from the apex side of cone is molded by a powder molding device so as not to interfere with a die of the device when removed from the die. The die has teeth for molding and is rotatably supported. A fixed guide mechanism for guiding the die is provided. Guide portions of the guide mechanism have a predetermined lead so that the die is rotated guided by the guide portions when the molded article is punched out of the die. Thus, the teeth formed on the molded article reliably disengage from the teeth for molding. This makes it possible to reliably punch the molded article out of the die.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: June 19, 2001
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Mamoru Sugimoto, Jiro Tanaka
  • Patent number: 6241931
    Abstract: Apparatus and a method for injection molding large container lids of the type having threads for screwing the lids onto and off large containers. The apparatus includes an injection mold having a cavity mold portion and a core mold portion which together define the shape of the lid. The core mold portion includes a stationary annular ring that defines the lid threads. A co-axial, rotatable center section of the core mold portion is opened to spin the molded lid off the core mold portion and release it from the mold.
    Type: Grant
    Filed: June 1, 1998
    Date of Patent: June 5, 2001
    Assignee: Top Grade Machining Ltd.
    Inventors: Vince Ciccone, Jerko Knezovic