Patents by Inventor Mark Hunt

Mark Hunt 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: 5803382
    Abstract: A gyratory crusher having a frame with a lower frame portion, a crusher head, a mounting mechanism for pivotally and gyrationally mounting the crusher head on the lower frame portion such that the crusher head operably gyrates between a closed side setting and a corresponding open side setting, a seal mechanism for operably protecting the mounting mechanism. The seal mechanism includes a flexible member having an outer edge, sealingly connected to the crusher head, and an inner edge, sealingly connected to the lower frame portion by an outer bearing race secured to the inner edge, an inner bearing race secured to the lower frame portion, and bearing balls captured between the outer and inner bearing races. The flexible member may have a single wall structure with a corrugation-like configuration, or a double wall structure with an inflatable bladder therebetween.
    Type: Grant
    Filed: January 21, 1997
    Date of Patent: September 8, 1998
    Assignee: Cedarapids, Inc.
    Inventors: William A. Ganser, IV, Joseph E. Musil, Donald W. Henry, Mark Hunt, David A. Ostergaard, John C. Vendelin, Peter Alford, Roger M. Clark, Jon Juhlin, James Mitchell, Gerald E. Parker
  • Patent number: 5788365
    Abstract: A stage lighting lamp unit includes a processor for receiving control data from a remote console. Beam orientation data for the lamp unit is passed to the lamp in the form of the x, y and z co-ordinates of a point in space through which the beam is to pass. The processor divides the required lamp travel into a number of stages dependent on execution duration data sent with the position data, and calculates, for each stage, a new value for pan and tilt angles for the lamp. These values are passed to pan and tilt controlling co-processors which control servo-motors for pan and tilt operation. The lamp unit also incorporates a rotatable shutter for interrupting the lamp beam when required. The shutters of all the lamps in a system can be instructed from the remote console to open and close in synchronism, thereby providing a stroboscopic effect.
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: August 4, 1998
    Assignee: Light & Sound Design, Ltd.
    Inventors: Mark A. Hunt, Keith J. Owen, Michael D. Hughes
  • Patent number: 5687175
    Abstract: A system and method for an adaptive time-division multiplexing communications protocol for collecting data from remote sensors equipped with RF transceivers using an RF transceiver equipped mobile data collection unit. RF transceivers interfaced to remote sensors actively monitor a predetermined RF transmission frequency to ascertain the presence of a signal transmitted by the mobile unit. All remote units detecting the RF signal listen for a message from the mobile unit requesting transmission of their unique identifier, i.e., their ID. This message contains the Time Division Base (TDB) specifying the number of time slots allocated for transmission of remote sensor IDs to the mobile unit. Using the TDB, each remote sensor randomly selects a time slot and transmits its ID to the mobile unit. Unique IDs of remote sensors received by the mobile unit are used to individually poll each sensor for data packet transmission.
    Type: Grant
    Filed: November 17, 1994
    Date of Patent: November 11, 1997
    Assignee: Utics Corporation
    Inventors: Virgil Maurice Rochester, Jr., Ariel Mark Hunt, Charles Stephen Jonson, John D. Weaver
  • Patent number: 5588021
    Abstract: A repeater for use in a control network includes isolating transformers at its root input/output and at a plurality of branch input/outputs. There is a line receiver and a line driver circuit associated with each of the isolating transformers. To determine the direction of transmission of signals through the repeater, there is a common mode voltage detector which detects a common mode voltage imposed on the wiring to the root side of the root transformer. A corresponding common mode voltage is imposed by the repeater on the branch side of each of the branch transformers. The repeater also includes a logic circuit for testing the validity of signals received from the branches and ensuring that only valid signals are passed to the root transformer.
    Type: Grant
    Filed: June 24, 1993
    Date of Patent: December 24, 1996
    Assignee: Light & Sound Design Limited
    Inventors: Mark A. Hunt, Andrew Murray
  • Patent number: 5502627
    Abstract: A stage lighting lamp unit includes a processor for receiving control data from a remote console. Beam orientation data for the lamp unit is passed to the lamp in the form of the x, y and z co-ordinates of a point in space through which the beam is to pass. The processor divides the required lamp travel into a number of stages dependent on execution duration data sent with the position data, and calculates, for each stage, a new value for pan and tilt angles for the lamp. These values are passed to pan and tilt controlling co-processors which control servo-motors for pan and tilt operation. The lamp unit also incorporates a rotatable shutter for interrupting the lamp beam when required. The shutters of all the lamps in a system can be instructed from the remote console to open and close in synchronism, thereby providing a stroboscopic effect.
    Type: Grant
    Filed: June 18, 1993
    Date of Patent: March 26, 1996
    Assignee: Light & Sound Design Limited
    Inventors: Mark A. Hunt, Keith J. Owen, Michael D. Hughes
  • Patent number: 5458211
    Abstract: A spade in a bit body is disclosed to have a planar body shaped with two intersecting cutting faces. The cutting faces extend to side faces defining spade width for cutting a hole to gauge. Inserts positioned in the body are at the comer of the spade. The inserts are formed of very hard material, and provide longer life.
    Type: Grant
    Filed: February 16, 1994
    Date of Patent: October 17, 1995
    Inventors: Thomas M. Dennis, Mark Hunt
  • Patent number: 5456329
    Abstract: An improved bifurcated drill bit is set forth. It has a shank for connection with a chuck, a cylindrical head having an outer face, and duplicate cutter faces. Each cutter is formed of PDC inserts which are cylindrical (or segments thereof). The PDC inserts are formed from a circular disk or ring which has an alignment hole in the center. When mounted, the insert presents a PDC face which bears against the drill hole. The drill hole is formed by cutting action of the inserts. Impact and shock loading occurs at the PDC surface.
    Type: Grant
    Filed: February 16, 1994
    Date of Patent: October 10, 1995
    Assignee: Dennis Tool Company
    Inventors: Thomas M. Dennis, Mark Hunt
  • Patent number: 5414328
    Abstract: A control console for controlling stage lighting includes a panel on which there are mounted a multiplicity of control elements in the form of switches, slider potentiometers and others which can be used by an operator to input control data to the console and directly control remote lamp units connected to the console. The console includes a main cpu which forms part of an electronic control system which includes function allocation means enabling the operator to determine which one of the control elements exercises control over a particular independently controllable function of one or more of the lamps. The console also includes a data distribution unit which includes a plurality of separate serial communication controllers for communicating with respective ones of the lamps. An SCSI bus is used for transferring data between the main cpu and the distribution unit, which includes its own processor unit for distributing the data to the serial communication controllers.
    Type: Grant
    Filed: June 18, 1993
    Date of Patent: May 9, 1995
    Assignee: Light & Sound Design, Ltd.
    Inventors: Mark A. Hunt, Keith J. Owen