Patents by Inventor Robert J. Purcell

Robert J. Purcell 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).

  • Patent number: 11708307
    Abstract: A composition comprises at least one form of attapulgite present in a solid weight fraction amount ranging from 0.25% to 5%; kaolin present in a solid weight fraction amount ranging from 17% to 50%; and optionally Ball Clay in a solid weight fraction amount ranging from 0% to 25%. Although makeable by other processes, in some embodiments, the composition is makeable by mixing component ingredients. Although usable for other purposes, in some embodiments, the composition is used to make ceramic pieces, e.g., via casting, pressing, jiggering or jollying, especially when the slip has solids, chemistry and viscosity suitable for shaping before drying, sintering, and optionally finishing.
    Type: Grant
    Filed: March 29, 2021
    Date of Patent: July 25, 2023
    Assignee: Active Minerals International, LLC
    Inventors: Dennis Clay Parker, Robert J. Purcell, Jr., Matthew J. Lyman, Donald Keith Mills, John W. Kitchens, Charles Pettit, James Cutright
  • Patent number: 11198646
    Abstract: A composition comprises at least one form of attapulgite present in a solid weight fraction amount ranging from 0.25% to 5%; kaolin present in a solid weight fraction amount ranging from 17% to 50%; and optionally Ball Clay in a solid weight fraction amount ranging from 0% to 25%. Although makeable by other processes, in some embodiments, the composition is makeable by mixing component ingredients. Although usable for other purposes, in some embodiments, the composition is used to make ceramic pieces, e.g., via casting, pressing, jiggering or jollying, especially when the slip has solids, chemistry and viscosity suitable for shaping before drying, sintering, and optionally finishing.
    Type: Grant
    Filed: May 3, 2018
    Date of Patent: December 14, 2021
    Assignee: Active Minerals International, LLC
    Inventors: Dennis Clay Parker, Robert J. Purcell, Jr., Matthew J. Lyman, Donald Keith Mills, John W. Kitchens, Charles Pettit, James Cutright
  • Patent number: 10683242
    Abstract: A composition, in the form of an aqueous suspension. The composition comprises at least one form of attapulgite present in a solid weight fraction (SWF) amount ranging from 0.065% to 0.30%. The composition comprises kaolin present in a percent solids by weight (w/w %) amount ranging from 0.80% to 2.80%. The composition comprises one or more main plant nutrients or major animal mineral nutrient supplements. In the composition, the total percent solids by weight (w/w %) amount in the composition ranges from 45% to 90%. Although usable for other purposes, the composition is usable as a fertilizer. Although makeable in other ways, the composition is makeable by mixing the ingredients with agitation sufficient enough to form an aqueous suspension.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: June 16, 2020
    Assignee: Active Minerals International, LLC
    Inventors: Steven B. Feldman, Jeffery Carr, Jr., Matthew J. Lyman, John Kitchens, Luke Fuhrmann, Robert J. Purcell, Jr., Dennis Parker
  • Patent number: 9670011
    Abstract: A method of transshipping solid particulates in an aqueous suspension of solid particulates, comprising dispersing solid particulates in an aqueous liquid in the presence of at least one mineral suspending agent to form the aqueous suspension of solid particulates. The aqueous suspension of the solid particulates is hauled via a first vehicle a distance greater than or equal to 1 km. The aqueous suspension of the solid particulates is transferred from the first vehicle to a second vehicle. The aqueous suspension of solid particulates is hauled via a second vehicle a distance greater than or equal to 1 km.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: June 6, 2017
    Assignee: ACTIVE MINERALS INTERNATIONAL, LLC
    Inventors: Robert J. Purcell, Jr., Dennis C. Parker, Steven B. Feldman, Rudolph Coetzee
  • Patent number: 9573849
    Abstract: A composition in the form of a backfill is described. The composition comprises one or more mine tailings present in an amount greater than 50% by weight of the composition, one or more cementitious binder materials present in an amount ranging from 0% to 12% by weight of the composition, attapulgite present in an amount ranging from 0.01% to 4.00% by weight of the composition, and water. The fines content (Fc) of the one or more mine tailings is greater than or equal to 3%. Although subject to many uses, in some embodiments, the composition is suitable for managing tailings to be stored above ground or underground. For example, in some embodiments, the composition is suitable for filling mined out areas.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: February 21, 2017
    Assignee: ACTIVE MINERALS INTERNATIONAL, LLC
    Inventors: Robert J. Purcell, Jr., Dennis C. Parker, Paul Fendley, Rudolph M. Coetzee, Steven B. Feldman
  • Patent number: 9511955
    Abstract: A method of transporting solid particulates in an aqueous suspension of the solid particulates, comprising dispersing solid particulates in an aqueous liquid in the presence of at least one mineral suspending agent, wherein solid particulates are transported a distance greater than or equal to 200 m.
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: December 6, 2016
    Assignee: ACTIVE MINERALS INTERNATIONAL, LLC
    Inventors: Robert J. Purcell, Jr., Dennis C. Parker, Matthew J. Lyman, James M. Smith
  • Patent number: 9416052
    Abstract: A composition, in the form of a concrete, cement paste, mortar or intermediate thereof, comprising one or more cementitious binder materials present in an amount ranging from 0.5% to 75% by weight of the composition, attapulgite present in an amount ranging from 0.01% to 1.00% by weight of the composition, and optionally water. Although subject to many uses, in some embodiments, the composition is suitable for applications in need or desire of self-consolidating concretes (SCCs), precast concrete, shotcrete, and the like. Although makeable by multiple methods, in some embodiments, the composition is made by mixing the component ingredients. In some embodiments, the composition has one or more properties chosen from superior aggregate suspension, eliminated segregation, improved workability, improved flowability, improved pumpability—or improved overall performance—of concretes.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: August 16, 2016
    Assignee: ACTIVE MINERALS INTERNATIONAL, LLC
    Inventors: Steven B. Feldman, Robert J. Purcell, Jr., Peter Tutbury, Paul Fendley, Dennis C. Parker, Rudolph Coetzee
  • Patent number: 7247263
    Abstract: The invention is directed to a system which allows for the rapid application of a water immobilizing dispersion in sufficient quantities to increase the fire protective and wetting characteristics of water. This system also increases the evaporative cooling and quenching effects of water. The primary constituents of the composition of this system are water, purified Attapulgite clay, and an environmentally safe salt, e.g., magnesium sulfate.
    Type: Grant
    Filed: October 29, 2003
    Date of Patent: July 24, 2007
    Assignee: ITC Minerals & Chemicals
    Inventors: Dennis C. Parker, Anthony W. Carignano, David L. Ruff, Robert J. Purcell
  • Publication number: 20040124403
    Abstract: The invention is directed to a system which allows for the rapid application of a water immobilizing dispersion in sufficient quantities to increase the fire protective and wetting characteristics of water. This system also increases the evaporative cooling and quenching effects of water. The primary constituents of the composition of this system are water, purified Attapulgite clay, and an environmentally safe salt, e.g., magnesium sulfate.
    Type: Application
    Filed: October 29, 2003
    Publication date: July 1, 2004
    Applicant: ITC MINERALS & CHEMICALS
    Inventors: Dennis C. Parker, Anthony W. Carignano, David L. Ruff, Robert J. Purcell
  • Patent number: 5484248
    Abstract: An endless track transporter is provided moving the semi-trailer of an on-highway wheeled tractor-trailer over terrain where it is desirable to exert low ground pressure. The transporter has a gate system which is controllably moveable for clearing the landing gear of the semi-trailer during hitching of the transporter to the semi-trailer.
    Type: Grant
    Filed: October 20, 1994
    Date of Patent: January 16, 1996
    Assignee: Caterpillar Inc.
    Inventor: Robert J. Purcell
  • Patent number: 5462345
    Abstract: A belted undercarriage assembly for a belt laying track machine includes a frame, an endless belt for supporting the machine, a plurality of spaced apart resilient wheels in contact with the belt, and a plurality of guide members associated with the belt. Each of the resilient wheels includes a side wall portion having a reinforcing ring attached thereto. The reinforcing rings are adapted to contact the guide members and prolong the useful life of the resilient wheels. The reinforcing rings are preferably segmented to provide a plurality of spaced apart pads having substantially straight edge portions for removing debris from the frame as the resilient wheels rotate.
    Type: Grant
    Filed: April 29, 1994
    Date of Patent: October 31, 1995
    Assignee: Caterpillar Inc.
    Inventor: Robert J. Purcell
  • Patent number: 5433515
    Abstract: A pair of guide rollers contact the side surfaces of the guide blocks of an endless elastomeric track belt and guide the guide blocks into a space formed between a pair of spaced apart idler wheels. The guide rollers prevent undesirable frictional contact between the guide blocks and the idler wheels, thereby increasing the useful life of the idler wheels and the guide blocks.
    Type: Grant
    Filed: January 18, 1994
    Date of Patent: July 18, 1995
    Assignee: Caterpillar Inc.
    Inventors: Robert J. Purcell, Ronald L. Satzler
  • Patent number: 5334106
    Abstract: A hydraulic recoil and belt tension control system is connected to a hydraulic motor of an endless belt propulsion device so that a common source of fluid is used to both drive the hydraulic motor and maintain proper tension in a drive belt of the propulsion device. The hydraulic recoil and belt tension control system includes first and second check valves to direct pressurized fluid from the appropriate one of first and second motor conduits to an actuating chamber of a belt tension actuator. A relief valve relieves excessive pressure in the actuating chamber and returns fluid exhausted from the actuating chamber during recoil through either of third and fourth check valves to the appropriate one of the first and second motor conduits. Utilizing the hydraulic motor drive circuit as the source of fluid for the hydraulic recoil and belt tension control systems eliminates at least two conduits between the propulsion device and the vehicle to which the propulsion device is mounted.
    Type: Grant
    Filed: May 6, 1993
    Date of Patent: August 2, 1994
    Assignee: Caterpillar Inc.
    Inventor: Robert J. Purcell
  • Patent number: 5191951
    Abstract: A belted undercarriage assembly for a vehicle, such as a non-powered towed trailer, includes first and second endless belt assemblies, one positioned on each side of the vehicle, first and second wheel supporting frame assemblies associated respectively with the first and second belt assemblies, and a supporting axle connected to each of the frame assemblies and to the vehicle. Each of the frame assemblies includes first and second rectangular shaped tubes which are adapted to telescope together. A first threaded adjusting mechanism controls the telescopic relationship of the first and second tubes and a second threaded adjusting mechanism controls lateral movement of the first tube relative to the second tube. Providing proper belt tension and alignment of the belt on the guide wheels are important to efficient and economical operation of a belted undercarriage assembly. If proper tension is not maintained, or if the belt drifts to one side or the other, undesirable heat buildup and wear are produced.
    Type: Grant
    Filed: August 30, 1991
    Date of Patent: March 9, 1993
    Assignee: Caterpillar Inc.
    Inventors: Brent C. Bargfrede, Carl W. Carter, James G. Neal, Robert J. Purcell
  • Patent number: 5046565
    Abstract: Blade mechanisms being operated along the ground have a tendency to draft into the ground unless some positive form of control is provided to prohibit the downdrafting of the blade. In the subject arrangement, a blade and linkage mechanism is provided for stopping a blade from drafting downward with respect to the ground. The linkage mechanism includes a tilt arm attached between a work vehicle and a top portion of the blade and a push arm attached between the work vehicle and a bottom portion of the blade. The tilt arm is movable relative to the vehicle through an arc which if extended intersects the push arm between its pivot connections. When the blade drafts downward, the different orientations of the tilt arm and the push arm corrects the downdraft due to the rear of a skid plate attached thereto being tilted with respect to the ground. The changing orientation of the skid plate with respect to the ground causes the front of the blade to raise with respect to the ground.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: September 10, 1991
    Inventor: Robert J. Purcell
  • Patent number: 4967850
    Abstract: Blade assemblies having a plurality of teeth extending therefrom are useful for working soil and/or for removing objects buried under the surface of the ground. However, having a plurality of teeth extending below the blade assembly can be detrimental since ground clearance is reduced or if the blade assembly inadvertently lowers during movement of the vehicle from one job site to another. In the subject arrangement, a blade assembly is provided having a plurality of teeth extending therefrom. The plurality of teeth are retractable in response to movement of a mechanism within the blade assembly. Upon raising the blade assembly to its carry position with subsequent retraction of the plurality of teeth, a mounting bar assembly which is associated with the plurality of teeth is moved into a recessed pocket of a latching flange. The latching flange is attached to a vehicle by a frame assembly.
    Type: Grant
    Filed: November 2, 1989
    Date of Patent: November 6, 1990
    Assignee: Caterpillar Inc.
    Inventors: Brent C. Bargfrede, Robert J. Purcell
  • Patent number: 4923257
    Abstract: A suspension system for a non-powered belted vehicle includes a pair of wheel assemblies positioned on each side of the vehicle, a flexible endless belt encircling each pair of wheel assemblies, and an axle assembly extending transverse to the wheel assemblies. The wheel assemblies are connected to the axle assembly by a plurality of pivotal arms and each pair of wheel assemblies are interconnected by a fluid actuated cylinder. Belted vehicles which utilize smooth wheels to frictionally engage the belt for driving and stopping the belt, require considerable tension between the wheels and the belt. High belt tension is desirable for driving and stopping but unnecessarily high belt tension is undesirable due to overstressing of vehicle components. The subject suspension system utilizes a variable load applied to the vehicle to increase the belt tension for efficient vehicle operation.
    Type: Grant
    Filed: April 13, 1989
    Date of Patent: May 8, 1990
    Assignee: Caterpillar Inc.
    Inventor: Robert J. Purcell
  • Patent number: 4896586
    Abstract: An assembly for stopping and retaining a floating piston within a closed cylinder includes a plurality of retaining ring segments which are seated within a groove provided in the internal wall of the cylinder. The retaining ring segments are held securely in place by a plurality of retaining plates which are clamped together by a plurality of threaded fasteners. The assembly is positioned deep within the cylinder at a specific location by a special tool. This tool also activates portions of the stop assembly to initially seat the retaining ring segments in the groove. A floating piston and associated seals are used in a combination oil and gas cylinder to separate the pressurized oil chamber from the compressed gas chamber. In order to maintain the piston in the cylinder while one chamber is evacuated and the other chamber remains pressurized, a piston stop and retainer assembly is required.
    Type: Grant
    Filed: July 21, 1988
    Date of Patent: January 30, 1990
    Assignee: Caterpillar Inc.
    Inventor: Robert J. Purcell
  • Patent number: 4881609
    Abstract: A vehicle capable of high speed operation over rough terrain has a suspension system including an elevated drive wheel, a front idler wheel, and a rear idler wheel with an elastomeric drive belt entrained therearound. The drive belt is driven by friction, and the suspension system includes a front suspension strut device having a recoil mechanism and a resilient front strut that resiliently biases the front idler wheel forwardly and downwardly. A braking device is in a protected location within side portions of the front idler wheel and reacts against the front suspension strut device to brake the vehicle. Such braking reaction minimizes the reduction of frictional engagement between the drive wheel and the drive belt due to the reaction of the drive belt against the recoil mechanism when traveling forwardly.
    Type: Grant
    Filed: December 22, 1987
    Date of Patent: November 21, 1989
    Assignee: Caterpillar Inc.
    Inventors: Robert J. Purcell, Robert R. Farris
  • Patent number: 4874052
    Abstract: A suspension system for the idlers and guide wheels, and related structures, of a belted track-type vehicle provides cushioning for the vehicle and components as the vehicle traverses obstacles and uneven terrain. The suspension system also provides tensioning and recoil for the endless track belt during ingestion of foreign material between the belt and the idler wheel. The suspension system includes a plurality of hydropneumatic struts connected between the vehicle frame and various belt guiding and supporting components. Most endless track machines utilize auxiliary frame assembles on each side of the main vehicle frame to support track guiding rollers, idler wheels, suspension systems, and track recoil mechanisms. These auxiliary frame assembles are bulky, heavy, and complicated and generally limit the total amount of suspension and recoil afforded to the idler wheels and track guide wheels.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: October 17, 1989
    Assignee: Caterpillar Inc.
    Inventors: Robert J. Purcell, Robert R. Farris