Test Mold Patents (Class 249/DIG4)
  • Patent number: 5305815
    Abstract: A method and apparatus for predicting nodularity of a hypo or hyper eutectic cast iron melt during casting is described. The method is particularly useful for NiMg-treated melts but can also be used for rare earth treated melts. A small sample of the melt is poured into a sample cup to which up to 0.025% wt bismuth is added and a cooling curve is produced during cooling. In a NiMg treated melt, a .DELTA.T (TER-TEU) of at least 9.degree. C. indicates good nodularity. In an RE treated melt, a .DELTA.T of less than 6.degree. C. at a TER/TEU of 1140.degree. C. also indicates good nodularity will be observed upon the solidification of the melt.
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: April 26, 1994
    Assignee: Queen's University
    Inventors: Zhu Pan Ping, Reginald W. Smith
  • Patent number: 5251866
    Abstract: A test mold assembly for evaluating the surface deformation tendency of a coverstock bonded to a reactive plastic formulation to voids in the formulation including a base adapted to support a coverstock and spaced side walls extending upwardly from the base to define a mold cavity for receiving foam precursors. The assembly further includes a lid adapted to form the top of the mold cavity and having a cover portion disposed spaced from the base. The lid includes a plurality of integral projections extending downwardly from the cover portion into the mold cavity a predetermined distance to create voids in the foam. A method of making a foam void model for evaluating the surface deformation tendency of a coverstock bonded to a reactive plastic formulation to voids in the formulation is also disclosed.
    Type: Grant
    Filed: October 21, 1991
    Date of Patent: October 12, 1993
    Assignee: Davidson Textron Inc.
    Inventors: Ellen Lord, Brian VanBenschoten, Daniel Durand
  • Patent number: 5240225
    Abstract: A plastic slump cone includes a unitary frusto-conical mold formed of a synthetic resin defining an open base at one axial end and a smaller open top at an opposite axial end for receiving a sample of freshly mixed concrete, in use. A pair of foot pieces formed of synthetic resin are secured to the mold and extend radially outwardly therefrom at the base on opposite sides thereof for holding the mold firmly in place while filling with a sample of concrete. A pair of handles formed of synthetic resin are secured to the mold and extend radially outwardly therefrom intermediate the base and the top and opposite sides thereof for lifting the mold when filled with a sample of concrete.
    Type: Grant
    Filed: October 15, 1991
    Date of Patent: August 31, 1993
    Assignee: Deslauriers, Inc.
    Inventors: Gary Workman, John M. Fitzgerald
  • Patent number: 5069417
    Abstract: An apparatus for providing a test sample of concrete from a large poured area of concrete includes a mold suitable for placement within the concrete form, said mold including a continuous sidewall and a bottom wall connected to the sidewall. An insert within said mold is spaced from the bottom wall so that a pressurization chamber is formed between the insert and the bottom wall of the mold. A fluid inlet is formed in the mold in fluid communication with the pressurization chamber and a fluid inlet tube is connected at a first end thereof to the fluid inlet. Preferably, the fluid tube is of a length sufficient to reach the surface of the concrete poured within the form. In one embodiment, a plurality of legs are formed on the insert to maintain the spacing of the insert from the bottom wall of the mold, the legs being separated sufficiently to allow fluid flow between them. In another embodiment, the space between the insert and the bottom of the mold is filled with a noncompressible fluid.
    Type: Grant
    Filed: July 13, 1990
    Date of Patent: December 3, 1991
    Inventor: Richard J. Boss
  • Patent number: 4842241
    Abstract: A mold for forming concrete having a bottom, a pair of side walls and a pair of end walls, all of plastic, and with the side walls and bottom being of integral one-piece construction and hinged together by living hinges defined by reduced thickness of the plastic panel. The ends walls are shaped with generally U-shaped channels dimensioned to lock onto the ends of the bottom and side walls whereby a watertight concrete mold is formed. The concrete mold is assembled by pivoting the side walls to an upright position relative to the bottom by means of the living hinges and the end walls are then secured to the bottom and side walls. The mold can be disassembled for removal of a formed concrete specimen by removal of the end walls and pivoting the side walls downwardly to a generally coplanar relation with the bottom to expose the test specimen for removal.
    Type: Grant
    Filed: May 5, 1988
    Date of Patent: June 27, 1989
    Assignee: Deslauriers, Inc.
    Inventors: John M. Fitzgerald, Gary L. Workman
  • Patent number: 4524604
    Abstract: A concrete permeability testing core comprises a cylinder of polymeric foam enclosed within an elastomeric envelope under tension. When placed in a cylindrical concrete mold in an axially concentric orientation, it can be used to form a concrete test specimen with a cylindrical cavity. After the concrete is cured and the outer concrete mold is removed, the polymer foam can be collapsed by contacting it with solvent for the foam. The elastomeric envelope, being under tension, contracts to a smaller size, permitting easy removal from the concrete and leaving a nascent cavity surface.
    Type: Grant
    Filed: February 25, 1983
    Date of Patent: June 25, 1985
    Inventor: Gary L. Vondran
  • Patent number: 4365784
    Abstract: During positioning of the cylindrical, open ended, outer member relative to a point on a slab form, a cap member may be used to cover the top and support a location determining member. The length of the outer member is adjustable to the thickness of the concrete layer to be poured. A cylindrical inner member, with a closed bottom and an open top, is inserted into the outer member. As the concrete is poured, it is received in the inner member and forms the test core. After the concrete sets, the inner member is removed, resulting in a hole in the concrete. The cap member is alternatively adapted to close the bottom of the outer member, prior to mounting the outer member on the form, to permit the hole to be subsequently filled, if the form has been removed.
    Type: Grant
    Filed: February 10, 1981
    Date of Patent: December 28, 1982
    Inventor: Joseph R. De Stasio
  • Patent number: 4291585
    Abstract: A device for sampling molten steel is provided with a mold cavity and an inlet path which includes a floatation-type slag separation chamber. A ceramic sieve is disposed at the outlet of the separation chamber to prevent large slag particles from passing through while trapping small slag droplets by adhesion.
    Type: Grant
    Filed: September 17, 1979
    Date of Patent: September 29, 1981
    Assignees: Mannesmann Aktiengesellschaft, Gustav Kolb
    Inventors: Gustav Kolb, Friedrich Bardenheuer
  • Patent number: 4138892
    Abstract: An electrically heated mold for making test specimens of concrete. The mold has two substantially identical mold halves pivotally mounted to each other and electric heating units selectively operated in response to the temperature variations in the concrete of the main structure. Each mold half has a heat transferring wall member which has a mold surface and an outer surface against which one of the heating units is placed. The mold is insulated and has a number of additional features designed to facilitate manufacture and operation of the mold as well as to increase its working life.
    Type: Grant
    Filed: June 22, 1977
    Date of Patent: February 13, 1979
    Inventor: George B. Davis
  • Patent number: 4112772
    Abstract: Molten metal sampling devices and methods in which a pair of mold halves, held together with a spring clip provide a sample having a generally large portion with a stem and a pair of smaller laterally offset smaller portions joined to the larger portion by thin severable connecting elements. Cylindrical and "T" shaped deoxidizing elements are also disclosed.
    Type: Grant
    Filed: September 7, 1976
    Date of Patent: September 12, 1978
    Inventor: Robert F. McDevitt
  • Patent number: 4096749
    Abstract: A core sampling device of the type utilized in forming concrete test cores in situ including a double-walled sleeve which is placed into the wet, fluid concrete in combination with an insertion tool whereby the sleeve, due to its configuration, may be pressed or "screwed" into the fluid concrete. By virtue of the double-walled construction of the sleeve, once the concrete has cured, the test core may be easily removed therefrom.
    Type: Grant
    Filed: April 29, 1977
    Date of Patent: June 27, 1978
    Inventor: Robert A. Stewart
  • Patent number: 4059996
    Abstract: A molten metal sample cup is provided with temperature sensing means to detect phase change in the metal within the cup as a metal sample solidifies. A blob of material which promotes the formation carbides is attached to the inside of the cup to contact the molten metal therein. The blob material comprises a carbide stabilizer selected from the group consisting of bismuth, boron, cerium, lead, magnesium and tellurium, a refractory material and a hydrogen evolving material.
    Type: Grant
    Filed: November 16, 1976
    Date of Patent: November 29, 1977
    Assignee: Electro-Nite Co.
    Inventor: Omer Paul Cure
  • Patent number: 4055086
    Abstract: A sampler for molten metal which includes a chamber having a tubular inlet for introducing the molten metal and an outlet from which air and later molten metal is vented before solidification of the metal takes place. Adjacent to the outlet a metal identification tag or appendage is provided which fuses to the sample as solidification takes place. In one embodiment two samplers are positioned side by side in a single holder with a single appendage linking the two samplers so that the resulting samples are joined by the identification tag.
    Type: Grant
    Filed: February 9, 1976
    Date of Patent: October 25, 1977
    Inventor: William J. Collins
  • Patent number: 4047690
    Abstract: A mold for concrete test cubes of plastic-like material having a vertically extending enclosure and, about midway, radially projecting impact ledges and at the top of the enclosure vertical spacers in the form of legs or extensions of wall panels.
    Type: Grant
    Filed: March 31, 1975
    Date of Patent: September 13, 1977
    Assignee: FORM-PLAST GmbH
    Inventors: Wilhelm Winter, Artur Held
  • Patent number: 3994172
    Abstract: A receptacle for extracting a sample of molten metal from a furnace while the metal is in the furnace or is being poured from it. The receptacle is formed of a mineral fiber or other suitable material having high heat insulating qualities with a portion of the wall of the receptacle being formed of a material that is a relatively good conductor of heat. The proportion of insulating material to good heat conducting material is such as to obtain the desired control of the solidification of the metal by preventing premature chilling and thereby improving the quality of the sample. The good heat conductor preferably presents a smooth surface to obtain a corresponding smooth surface on the metal sample to facilitate processing it in the metallurgical laboratory.
    Type: Grant
    Filed: March 14, 1975
    Date of Patent: November 30, 1976
    Assignee: Robert C. Collins
    Inventor: Edward A. Kelsey
  • Patent number: 3983755
    Abstract: The invention involves providing a molten metal sampler or device with means for dissipating heat therefrom when the sample is obtained.
    Type: Grant
    Filed: March 31, 1975
    Date of Patent: October 5, 1976
    Inventor: William J. Collins