Patents by Inventor Charles N. Grichar
Charles N. Grichar has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20020130064Abstract: Screens and screen assemblies for a vibratory separator or shale shaker, such screens and screen assemblies made by a method including applying glue in a glue pattern to at least one layer of screening material, said applying done by powered moving mechanical glue application apparatus; in one aspect moving with powered mechanical screen movement apparatus the at least one layer of screening material beneath the powered moving mechanical glue application apparatus; in one aspect, using hot melt moisture-curing glue, and in one aspect facilitating the cure of moisture-curing glue by applying moisture to it.Type: ApplicationFiled: February 19, 2002Publication date: September 19, 2002Inventors: Thomas C. Adams, Kerry Ward, Kenneth W. Seyffert, David W. Largent, David L. Schulte, Charles N. Grichar, Vincent D. Leone, Jeffrey E. Walker, Guy L. McClung
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Patent number: 6450345Abstract: A method for making a screen for a vibratory separator, the method including placing at least one layer of screening material below a glue application apparatus, the glue application apparatus including a main body and a plurality of movable glue nozzles movably connected to the body, applying with the movable glue nozzles an amount of glue, in a pattern to at least a portion of the at least one layer of screening material by moving the movable glue nozzles over the at least one layer of screening material. The method wherein the glue application apparatus includes at least one stationary glue nozzle secured immovably to the main body, the method including applying at least one shearable glue bead having a length to the screening material so that shearing the screening material along the length of the at least one shearable glue bead produces separate sections of the screening material.Type: GrantFiled: June 27, 2000Date of Patent: September 17, 2002Assignee: Varco I/P, Inc.Inventors: Thomas C. Adams, Kenneth W. Seyffert, David W. Largent, David L. Schulte, Jr., Charles N. Grichar, Vincent D. Leone, Jeffrey E. Walker, Guy L. McClung, III
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Publication number: 20020104611Abstract: A method for flattening non-flat areas of screening material of a screen assembly, the non-flat areas of screening material between lines of glue gluing together a plurality of layers of screening material, the plurality of glued-together layers of screening material secured to a frame, the method including mounting the screen assembly on a vibratory separator, the vibratory separator located in an environment at an ambient temperature, vibrating the screen assembly with the vibratory separator for a period of time, feeding material to be treated onto the screen assembly, the material to be treated at a material temperature above the ambient temperature, the period of time of such a temporal length and the material temperature of such a temperature to effect flattening of the non-flat areas of screening material.Type: ApplicationFiled: January 16, 2002Publication date: August 8, 2002Inventors: Thomas C. Adams, Kerry T. Ward, Kenneth W. Seyffert, David W. Largent, David L. Schulte, Charles N. Grichar, Vincent D. Leone, Jefrey E. Walker, Guy L. McClung
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Patent number: 6412644Abstract: A vibratory separator for separating components of material introduced to the vibratory separator, the vibratory separator including a basket for holding screening apparatus, the basket having two sides spaced-apart by a first end at which the material is introduced into the basket and a second end spaced-apart from the first end, certain components separated from the material exiting the basket from the second end, vibrating apparatus connected to the basket for vibrating the basket, screening apparatus mounted in the basket, the screening apparatus having at least a first portion and a second portion, the first portion lower in the basket than the second portion, and receptacle apparatus below the screening apparatus for receiving material components flowing through the screening apparatus.Type: GrantFiled: November 28, 2000Date of Patent: July 2, 2002Assignee: Varco I/P, Inc.Inventors: Mark D Crabbe, David L. Schulte, Charles N. Grichar
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Patent number: 6371302Abstract: A screen assembly which, in at least certain aspects, has at least one wire mesh screen formed with undulating mesh material having a series of ridges spaced apart by a series of valleys, a corrugated perforated plate with an undulating shape corresponding to the undulating mesh material of the at least one wire mesh screen, the at least one wire mesh screen on the corrugated perforated plate, a series of spaced apart rods all of which are in one plane, the corrugated perforated plate mounted on the rods of the series of spaced apart rods, and each rod having a length and independent of and not connected to the other rods along its length by any member in the same plane as the rods, each rod having two spaced apart ends.Type: GrantFiled: October 11, 2000Date of Patent: April 16, 2002Assignee: Tuboscope I/P, Inc.Inventors: Thomas C. Adams, Kenneth W. Seyffert, David W. Largent, David L. Schulte, Jr., Jeffrey E. Walker, Hector M. Murray, Vincent D. Leone, Charles N. Grichar, Guy L. McClung, III
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Patent number: 6371301Abstract: A screen mounting basket for a vibratory separator for separating components of material introduced into the basket, the vibratory separator including a collection receptacle beneath the basket, the basket including two opposed spaced-apart side walls having first ends and second ends, the first ends spaced-apart by an end wall connected to each of the side walls, at least one opening through the end wall or one of the side walls, at least one secondary screen within or outside the basket over said at least one opening, at least one basket screen within the basket, and the at least one secondary screen and the at the at least one basket screen for separating a first component from the material, the first component flowing through the at least one secondary screen into the collection receptacle without flowing through the basket screen. The basket screen may be deleted and all fluid flow may be out from the secondary screen or screens.Type: GrantFiled: November 17, 2000Date of Patent: April 16, 2002Assignee: Varco I/P, Inc.Inventors: David L. Schulte, Charles N. Grichar
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Publication number: 20020000399Abstract: A screen assembly for a vibratory separator, the screen assembly having a first screen portion having a first end and a second end spaced apart from the first end, and a second screen portion formed integrally of or connected to the second end of the second screen portion. A screen assembly with a first portion of screening material and a second raised portion of screening material, the second raised portion extending from a material introduction end of the screen assembly to a material exit end thereof, the raised portion, in one aspect, culminating in an apex above the first portion of screening material.Type: ApplicationFiled: March 28, 2001Publication date: January 3, 2002Inventors: Joseph Charles Winkler, Thomas C. Adams, David L. Schulte, Kenneth W. Seyffert, David W. Largent, Charles N. Grichar, Guy L. McClung
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Patent number: 6325216Abstract: A screen assembly for a vibratory separator, the screen assembly including at least one lower coarse screen member, at least one upper fine screen member above the at least one lower coarse screen member and fused with plastic to the at least one lower coarse screen member, and a strip member beneath and adhered to the at least one lower coarse screen member. In one aspect the strip member includes two side strips, two end pieces, and a plurality of spaced-apart strips parallel to the two side strips each with an end terminating at, in, or on each of the end pieces.Type: GrantFiled: September 3, 1999Date of Patent: December 4, 2001Assignee: Tuboscope I/P, Inc.Inventors: Kenneth W. Seyffert, Thomas C. Adams, David Largent, David L. Schulte, Jr., Charles N. Grichar, Vincent D. Leone, Jeffrey Walker, Guy L. McClung, III
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Patent number: 6269953Abstract: A screen assembly for a vibratory separator has been invented, which, in certain aspects, has at least two ridge-valley series of screening material with a plurality of alternating ridges and valleys of screening material, and at least one flat area of screening material adjacent at least one of the ridge-valley series.Type: GrantFiled: September 16, 1999Date of Patent: August 7, 2001Assignee: Tuboscope I/P, Inc.Inventors: Kenneth W. Seyffert, Thomas W. Adams, David W. Largent, Charles N. Grichar, David L. Schulte, Jr., Guy L. McClung, III, Jeffrey E. Walker, Hector M. Murray, James F. Maroney, III, Joseph C. Winkler
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Patent number: 6220449Abstract: A screen for a vibratory shaker for treating material flowing thereto, the screen in certain aspects having a lower support made of criss-crossed wires which define a plurality of spaced-apart holes through the lower support, the wires having top surfaces with a substantially flat portion, and screening material on the top surfaces of the wires.Type: GrantFiled: October 1, 1999Date of Patent: April 24, 2001Assignee: Tuboscope I/P, Inc.Inventors: David L. Schulte, Jr., Kenneth W. Seyffert, Thomas C. Adams, Charles N. Grichar
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Patent number: 6032806Abstract: A screen is disclosed which, in certain aspects, has screening material between opposed frame sides and one or more lower strips beneath the screen. In one aspect these strips are only inteconnected via their ends and not along their lengths. In certain aspects, a plurality of lower strips are bonded to the screen and extend across the screen from one frame side to the other. In one aspect one or more of the strips has one, two, or more humps or ridges corresponding to one or more corrugations in a corrugated perforated plate and/or corrugated screen assembly which is on the plate or, with no plate present, on the strips. In another aspect instead of the strips a solid corrugated perforated plate is used. In one aspect openings or perforations through the plate are triangular. In one aspect the screen is undulating screening material and lower portions of the screening material are bonded to a plate or to strips. Optionally screen mounting hooks or frame edges or screen edges may be used with such screens.Type: GrantFiled: March 25, 1999Date of Patent: March 7, 2000Assignee: Tuboscope I/P, Inc.Inventors: Vincent D. Leone, Thomas C. Adams, Jeffrey Walker, David L. Schulte, Jr., Charles N. Grichar, Kenneth W. Seyffert, Guy L. McClung, III
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Patent number: 5971159Abstract: A screen is disclosed which, in certain aspects, has screening material between opposed frame sides and one or more lower strips beneath the screen. In one aspect a plurality of lower strips are bonded to the screen and extend across the screen from one frame side to the other. In one aspect one or more of the strips has one, two, or more humps or ridges corresponding to one or more corrugations in a corrugated perforated plate and/or corrugated screen assembly which is on the plate or, with no plate present, on the strips. In another aspect instead of the strips a solid corrugated perforated plate is used. In one aspect openings or perforations through the plate are triangular. In one aspect the screen is undulating screening material and lower portions of the screening material are bonded to a plate or to strips. Optionally screen mounting hooks or frame edges or screen edges may be used with such screens. A screening apparatus or shale shaker is disclosed which uses such plates and screens.Type: GrantFiled: January 21, 1997Date of Patent: October 26, 1999Assignee: Tuboscope I/P, Inc.Inventors: Vincent D. Leone, Thomas C. Adams, Jeffrey Walker, David L. Schulte, Jr., Charles N. Grichar, Kenneth W. Seyffert, Guy L. McClung, III
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Patent number: 5598930Abstract: A screen for a shale shaker has screening material between opposed frame sides and one or more lower strips beneath the screen. In one aspect a plurality of lower strips are bonded to the screen and extend across the screen from one frame side to the other. In one aspect the screen is undulating screening material and lower portions of the screening material are bonded to the strips.Type: GrantFiled: July 20, 1995Date of Patent: February 4, 1997Assignee: Advanced Wirecloth, Inc.Inventors: Vincent D. Leone, Jeffrey E. Walker, Charles N. Grichar, Kenneth W. Seyffert, Guy L. McClung, III
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Patent number: 4743226Abstract: A high capacity continuous solid bowl centrifuge is disclosed having longitudinal vanes which cooperate with helical flights to form longitudinal channels. The longitudinal vanes may be curved vanes or they may be planar vanes disposed either radially or at an acute angle relative to a radius from the longitudinal axis of the centrifuge. In operation, the solids/liquid mixture fed into the centrifuge is separated, and the liquids move in a "plug-flow" manner in the longitudinal channels parallel to the axis of rotation, toward effluent discharge ports disposed at one end of the centrifuge. The separated heavier solids are moved by the flights toward the opposite end of the centrifuge where they exit through a solids discharge port.Type: GrantFiled: April 29, 1983Date of Patent: May 10, 1988Assignee: Geosource Inc.Inventors: Roger W. Day, Charles N. Grichar
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Patent number: 4505591Abstract: Solids mixing well structure and methods are disclosed for mixing a solid having a first specific gravity with a fluid having a second specific gravity to produce a slurry having an intermediate specific gravity and a resultant pressure greater than atmospheric pressure. The solids can then be transported in the form of a slurry using the resultant pressure. At no time do the solids come in contact with a pump member. The apparatus and methods are particularly suited for transporting coal and solid waste material. No moving parts are required other than a pump to supply fluid pressure. A first cylindrical member receives at its inlet fluid at a pressure greater than atmospheric pressure and delivers the fluid at a first pre-determined pressure to a mixing region. A second structure receives at its inlet solids at atmospheric pressure and delivers the solids at the first pre-determined pressure to the mixing region down stream of the fluid.Type: GrantFiled: December 20, 1982Date of Patent: March 19, 1985Assignee: Geosource Inc.Inventors: Roger W. Day, Charles N. Grichar