Patents Represented by Law Firm Herzog, Crebs & McGhee
  • Patent number: 6147335
    Abstract: Various components of thermal systems are shown molded within a polymer composite sheath, including heaters, sensors, and control circuits. The use of transfer and compression molding allows for the use of thermoset polymers containing very high levels of reinforcement fillers. These improved materials, in turn, create a component with superior thermophysical properties, including high heat flux levels, thermal conductivity, impact resistance, corrosion resistance, and maintenance of mechanical properties at high temperatures (>300.degree. F.). The present invention also allows for wide variety of geometric configurations and the possibility to insert temperature sensors directly in hot zones of heaters.
    Type: Grant
    Filed: March 25, 1999
    Date of Patent: November 14, 2000
    Assignee: Watlow Electric Manufacturing Co.
    Inventors: Theodore T. Von Arx, Louis P. Steinhauser, A. Konrad Juethner
  • Patent number: 6140623
    Abstract: An end cap for a defrost heater is shown in which a positive locking mechanism is used to allow the lead wires to extend downward from the end cap. This increases the end cap's resistance to moisture and simplifies the design, thus lowering manufacturing cost. The end cap is also shown with a vertical vent that overlaps the retaining bore to significantly increase venting area over prior designs. The positive locking mating tab and the vent are located in two separate, but adjacent, vertical passages.
    Type: Grant
    Filed: August 25, 1999
    Date of Patent: October 31, 2000
    Assignee: Wirekraft Industries, Inc.
    Inventors: Michael J. Boehnlein, Michael J. Cousins
  • Patent number: 6124579
    Abstract: A molded polymer composite heater is shown. The use of transfer molding and compression molding allows for the use of thermoset polymers containing very high levels of reinforcement fillers. These improved materials, in turn create a heater with thermophysical properties superior to the prior art, including higher heat flux levels, thermal conductivity, impact resistance, and maintenance of mechanical properties at high temperatures (.about.>300.degree. F.). The present invention also allows for wide variety of geometric configurations and the possibility to insert temperature sensors directly in hot zones of the heater.
    Type: Grant
    Filed: October 6, 1997
    Date of Patent: September 26, 2000
    Assignee: Watlow Electric Manufacturing
    Inventors: Louis P. Steinhauser, A. Konrad Juethner
  • Patent number: 6120035
    Abstract: An end cap with a inwardly flanged bevel tapered seal utilized on sample cylinders for pipeline applications that provides a better means for sealing the sample cylinder. The present invention specifically relates to mating ring seal members having a beveled mitered interface and each member having an inward flange or lip. The preferred embodiment of the invention was designed with a sample cylinder in mind wherein the sample cylinder has an end cap with a purging port and a piston that reciprocates within said sample cylinder. The typical sample cylinder is designed such that contents in the internal sampling chamber can be purged through the purging port of the end cap by plunging the piston inside the sampling chamber against the end cap in a reciprocating fashion.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: September 19, 2000
    Assignee: Welker Engineering Company
    Inventor: Brian H. Welker
  • Patent number: 6120367
    Abstract: A partially automated decoring saw having a tubular blade and a table surface partially blocking the saw blade opening and means decreasing the blockage temporarily to allow for passage of an enlarged portion of the core into the saw. A core knocker can also be provided, as can air purge of blade seals to achieve partial self-cleaning.
    Type: Grant
    Filed: September 17, 1998
    Date of Patent: September 19, 2000
    Assignee: IBP, inc.
    Inventors: Jerry Silliman Scott, Steven Wesley Henry, William Lauren Mahl, James F. Dill, William G. Leary, Andrew C. Harvey
  • Patent number: 6104011
    Abstract: A thermocouple with a tubular metallic sheath extending longitudinally about a sheath centerline; a first wire of a first material within the sheath and coiled about a first centerline lying parallel to the sheath centerline; a second wire of a second material within the sheath and coiled about a second centerline lying parallel to the sheath centerline; a hot junction within the sheath connecting the wires; and a layer of insulation separating the wires from each other and from the sheath.
    Type: Grant
    Filed: September 4, 1997
    Date of Patent: August 15, 2000
    Assignee: Watlow Electric Manufacturing Company
    Inventor: Rolando O. Juliano
  • Patent number: 6092519
    Abstract: A case for heating sample containers during transport, where the case has a housing that containing thermal insulation and a disposable heating material that generates heat by chemical reaction with oxygen. Closeable apertures allow control over the access of oxygen to the heating material, and thereby over the rate of reaction. A method of portably heating a sample cylinder is also disclosed.
    Type: Grant
    Filed: March 11, 1999
    Date of Patent: July 25, 2000
    Assignee: Welker Engineering Company
    Inventors: David J. Fish, Brian H. Welker
  • Patent number: 6091489
    Abstract: An optic device for use in viewing the interior of pressurized vessels, especially high pressure fluid pipelines. Embodiments of the optic device allow manual or automatic insertion/retraction of the viewing head allowing variable depth viewing of the interior. The viewing head is capable of various embodiments including the ability to carry various optic devices and is adapted to withstand high pressures. The automatically insertable optic device can be either hydraulically or pneumatically actuated. Both the automatic and manual optic devices may be fixed or variable focus. The fixed focus devices utilize lenses, ultra-miniature color cameras, and fiberscopes either with or without integral light sources as part of the viewing head. The variable focus device utilizes lenses and a reflector. Preferably, the viewing head utilizes sapphire viewing windows which exhibit excellent light transmission and resistance to high pressures.
    Type: Grant
    Filed: February 25, 1998
    Date of Patent: July 18, 2000
    Assignee: Welker Engineering Company
    Inventor: Brian H. Welker
  • Patent number: 6085777
    Abstract: A probe structure for inserting into and operating upon an object within a pipeline, especially a high pressure pipeline carrying liquid or gas, is characterized by two coaxial cylinders that can be either pneumatically or hydraulically actuated. A primary cylinder is adapted to be mounted onto a pipeline tee and/or valve, and includes a movable primary piston to which is fixedly attached a primary lower hollow shaft that moves with the primary piston and preferably a primary upper hollow shaft that also moves with the primary piston. The primary lower hollow shaft is adapted to selectively extend into the pipeline while the primary upper hollow shaft extends above the primary cylinder and is fixed to a secondary cylinder, such that the secondary cylinder moves with the primary piston. The secondary piston includes a secondary piston that moves independently of the first and second cylinders.
    Type: Grant
    Filed: February 19, 1998
    Date of Patent: July 11, 2000
    Assignee: Welker Engineering Company
    Inventor: Brian H. Welker
  • Patent number: 6036119
    Abstract: An elastomeric vaporizing injection nozzle for pipeline applications that provides an adjustable fluid flow rate, and a uniform, consistent and predictable spray pattern.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: March 14, 2000
    Assignee: Welker Engineering Company
    Inventor: Brian H. Welker
  • Patent number: 6037574
    Abstract: An electric, resistance element heater utilizes quartz as a sheath material and has a resistance (heating) element that is in intimate, substantially continuous contact with a surface of the quartz. This allows the heater to operate in any one or all of the three modes of heat transfer, namely, radiation, conduction and convection. Such intimate, substantially continuous contact of the resistance element is achieved by applying the element in direct contact with the quartz surface. This is accomplished by applying a heating circuit directly to the quartz surface, which heating element can be a foil element, or a thick or a thin film deposition element. The overall heater is formed by covering the heater element by a quartz sheath and attaching leads formed on the ends of the heater element to a source of electric energy. Sensors such as thermocouples, RTD's and the like can also be incorporated directly into the heater structure. Also, the heater can be fashioned into a variety of shapes.
    Type: Grant
    Filed: November 6, 1997
    Date of Patent: March 14, 2000
    Assignee: Watlow Electric Manufacturing
    Inventors: Christopher C. Lanham, Kevin Ptasienski, Louis P. Steinhauser, Robin H. Lake, James H. Kreisel
  • Patent number: 6027123
    Abstract: A tank piston is shown with an improved seal and wiper. The piston is used in conjunction with tanks used for transporting semi-solid and viscous materials such as grease, oil, ink, and the like. The improved seal consists of an annular rubber member with a hollow chamber filled with an open cell foam material such as polyurethane, or a gel such as silica gel. The material in the chamber is compressible and expandable to provide a seal about the piston. Additionally, the piston is provided with an annular wiper structure that extends about the outer forward periphery of the piston, and is forwardly angled at about 45.degree. relative to an axis of the piston. The wiper has a beveled end that makes contact with the interior surface of the tank to provide a cleaning action. A complementary second wiper may be added near the outer rearward periphery of the piston.
    Type: Grant
    Filed: September 10, 1997
    Date of Patent: February 22, 2000
    Assignee: CBW Transport Services, Inc.
    Inventors: Thomas E. Berry, Sr., Christopher K. Duncan
  • Patent number: 6025004
    Abstract: An adjustable variable flow restriction element and an extruder containing the same are provided for mechanically controlling the bulk density of an extruded material. The adjustable flow restriction element is located in an extruder proximate to the die of the extruder in position to partially block the downstream flow of material through the extruder. The adjustable flow restriction element is structured to be capable of assuming one of a plurality of uniquely flow restrictive positions, where the degree of restriction of flow controls the bulk density of an extruded material. A method of mechanically controlling the bulk density of an extruded material by restricting the flow of the material through an extruder is also provided.
    Type: Grant
    Filed: July 2, 1997
    Date of Patent: February 15, 2000
    Assignee: Ralston Purina Company
    Inventors: Donald R. Speck, Alfred H. Mirman
  • Patent number: 5996425
    Abstract: A sample cylinder for holding natural gas or other fluid samples for analysis which can completely clear itself of one sample before being filled with a subsequent sample. The piston is adapted to receive an elastomeric head which is preferably concave to the end cap. The end cap is also preferably sloped downward toward the outlet. When the piston head contacts the end cap, contact begins near the cylinder body wall and progresses inward to the outlet. The end cap is adapted to receive an elastomeric gasket seal instead of an o-ring. No spaces are left between the end cap and the cylinder body which could retain sample fluid.
    Type: Grant
    Filed: May 28, 1997
    Date of Patent: December 7, 1999
    Assignee: Welker Engineering Company
    Inventor: Brian H. Welker
  • Patent number: 5973296
    Abstract: Hot runner injection molding systems with externally heated injection runner nozzles for such systems. The heater is preferably a tubular heater with the resistive element applied to the exterior surface by fine film printing. The heater is adapted to externally heat a hot runner injection mold runner nozzle.
    Type: Grant
    Filed: October 20, 1998
    Date of Patent: October 26, 1999
    Assignee: Watlow Electric Manufacturing Company
    Inventors: Roly Juliano, Christopher C. Lanham, Louis P. Steinhauser
  • Patent number: 5945611
    Abstract: A device for introducing a sample into or removing a sample from a pipeline, tube, or the like, and more particularly to a device for sampling fluids under pressure in a pipeline, tube, duct, conduit, or the like.
    Type: Grant
    Filed: July 15, 1998
    Date of Patent: August 31, 1999
    Assignee: Welker Engineering Company
    Inventor: Brian H. Welker
  • Patent number: D420448
    Type: Grant
    Filed: January 15, 1999
    Date of Patent: February 8, 2000
    Assignee: Handi-Craft Company
    Inventors: Robert J. Brown, Bernard J. Kemper, Roberta Brown
  • Patent number: D423107
    Type: Grant
    Filed: January 15, 1999
    Date of Patent: April 18, 2000
    Assignee: Handi-Craft Company
    Inventors: Robert J. Brown, Bernard J. Kemper, Roberta Brown
  • Patent number: D424016
    Type: Grant
    Filed: July 14, 1998
    Date of Patent: May 2, 2000
    Assignee: Watlow Electric Manufacturing Company
    Inventors: Mark K. Gipson, Steven K. Klingemann, Jason J. Alvarez, Shawn O. Barrett, Arthur O. Volbrecht
  • Patent number: RE36867
    Abstract: A compartmentalized plastic food package includes a container and sealed cover which have a plurality of individually sealed chambers for distinct foodstuffs. The container includes a top flange or surface which extends about the individual chambers onto which the removable cover is secured by an adhesive or heat sealing. The top flange includes a peripheral shoulder and lip which cooperates with the rear or bottom edge of certain of the chambers to facilitate substantially upright self-display of the container and contents. The sidewalls of the chambers are tapered and include notched or stepped spacers such that the containers may be controllably nested, the spacers preventing overly tight nesting and thus facilitating separation prior to filling and sealing. A plurality of distinct foodstuffs such as meat, cheese, crackers and cookies, for example, may be individually sealed in the chambers, thereby maintaining each foods flavor, aroma and desired moisture content.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: September 12, 2000
    Assignee: IBP Foods, Inc.
    Inventor: Michael J. Rozzano