Patents by Inventor Mark D. Robinson

Mark D. Robinson 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: 11584036
    Abstract: An apparatus, system and method for adjusting and setting a fixed position of an axially displaceable shaft and rotary chipper disc combination, without requiring an attachment to or obstruction of an end face of either end of the axially displaceable shaft. A rotary chipper disc recoil mechanism is also provided for the purpose of detection of unwanted axial forces placed upon the rotating shaft caused by unintentional chipping of metal, and for limiting consequential damage caused by the unintentional chipping of metal and other non-wood materials.
    Type: Grant
    Filed: November 14, 2020
    Date of Patent: February 21, 2023
    Assignee: CEM Machine, Inc.
    Inventors: Mark D. Robinson, Jason M. Flint, Daniel R. McBride
  • Publication number: 20210129374
    Abstract: An apparatus, system and method for adjusting and setting a fixed position of an axially displaceable shaft and rotary chipper disc combination, without requiring an attachment to or obstruction of an end face of either end of the axially displaceable shaft. A rotary chipper disc recoil mechanism is also provided for the purpose of detection of unwanted axial forces placed upon the rotating shaft caused by unintentional chipping of metal, and for limiting consequential damage caused by the unintentional chipping of metal and other non-wood materials.
    Type: Application
    Filed: November 14, 2020
    Publication date: May 6, 2021
    Inventors: MARK D. ROBINSON, JASON M. FLINT, DANIEL R. MCBRIDE
  • Patent number: 10836070
    Abstract: An apparatus, system and method for adjusting and setting a fixed position of an axially displaceable shaft and rotary chipper disc combination, without requiring an attachment to or obstruction of an end face of either end of the axially displaceable shaft. A rotary chipper disc recoil mechanism is also provided for the purpose of detection of unwanted axial forces placed upon the rotating shaft caused by unintentional chipping of metal, and for limiting consequential damage caused by the unintentional chipping of metal and other non-wood materials.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: November 17, 2020
    Assignee: CEM Machine, Inc.
    Inventors: Mark D. Robinson, Jason M. Flint, Daniel R. McBride
  • Publication number: 20170326754
    Abstract: An apparatus, system and method for adjusting and setting a fixed position of an axially displaceable shaft and rotary chipper disc combination, without requiring an attachment to or obstruction of an end face of either end of the axially displaceable shaft. A rotary chipper disc recoil mechanism is also provided for the purpose of detection of unwanted axial forces placed upon the rotating shaft caused by unintentional chipping of metal, and for limiting consequential damage caused by the unintentional chipping of metal and other non-wood materials.
    Type: Application
    Filed: May 11, 2017
    Publication date: November 16, 2017
    Inventors: MARK D. ROBINSON, JASON M. FLINT, DANIEL R. MCBRIDE
  • Patent number: 8051887
    Abstract: A wood chipper having a rotatable disc that contains a series of slots that pass through the disc. A primary chipper knife is located at the entrance of each slot which separates slices from a work piece and directs the slices through the slot. A counter knife unit is mounted within each slot for engaging the slices leaving the primary chipper knife to reduce the size of the chips as they move through the slot. The counter knife unit contains a first series of spaced apart chip contact elements that have a first height to contact the slices as they leave the primary chipper knife to reduce the size of the slices. The counter knife further contains a second series of chip contact elements that have a second height that is less than that of the chip contact element in the first series. Each contact element in the second series is arranged to contact chips leaving the contact elements in the first series to further reducing the size of the chips.
    Type: Grant
    Filed: November 4, 2009
    Date of Patent: November 8, 2011
    Assignee: CEM Machine, Inc.
    Inventors: Mark D. Robinson, Scott J. Boliver
  • Publication number: 20110100511
    Abstract: A wood chipper having a rotatable disc that contains a series of slots that pass through the disc. A primary chipper knife is located at the entrance of each slot which separates slices from a work piece and directs the slices through the slot. A counter knife unit is mounted within each slot for engaging the slices leaving the primary chipper knife to reduce the size of the chips as they move through the slot. The counter knife unit contains a first series of spaced apart chip contact elements that have a first height to contact the slices as they leave the primary chipper knife to reduce the size of the slices. The counter knife further contains a second series of chip contact elements that have a second height that is less than that of the chip contact element in the first series. Each contact element in the second series is arranged to contact chips leaving the contact elements in the first series to further reducing the size of the chips.
    Type: Application
    Filed: November 4, 2009
    Publication date: May 5, 2011
    Applicant: CEM Machine, Inc.
    Inventors: Mark D. Robinson, Scott J. Boliver
  • Publication number: 20100230523
    Abstract: A disc type wood chipper that utilizes a high percentage of the energy required for chipping but not substantially utilized in the material size reduction within the machine to produce chips of a small enough size such that the chips produced can be turned into wood flour or wood pellets with the expenditure of very little additional energy.
    Type: Application
    Filed: March 11, 2009
    Publication date: September 16, 2010
    Inventors: Mark D. Robinson, Daniel R. McBride
  • Patent number: 7093972
    Abstract: A mixing head assembly comprising a housing having an input mix chamber passageway and a non-perpendicular output passageway. The assembly also includes a first input including a first nozzle for injecting a first fluid into the input mix chamber passageway and a second nozzle for injecting a second fluid into the input mix chamber passageway whereby the second fluid can mix with the first fluid to form a mixed fluid. The first nozzle and the second nozzle are configured to inject the first fluid and the second fluid into the input mix chamber passageway such that the first fluid and the second fluid meet at an intersection point. The first axial line and the second axial line are neither co-linear nor co-planar. Furthermore, an intersection point of the first fluid and the second fluid is not located along a longitudinal axis of the input mix chamber passageway.
    Type: Grant
    Filed: June 20, 2003
    Date of Patent: August 22, 2006
    Assignee: MHR, Inc.
    Inventors: Gordon W. Breuker, Mark D. Robinson
  • Patent number: 6966724
    Abstract: Method of replacing a blind flange manhole cover of the type including a bolted on blind flange mounted on a bolting flange of a negative pressure storage tank manway with a manhole cover having a hinged door assembly includes the step of removing the blind flange manhole cover from the bolting flange of a tank-installed manway. The manhole cover may be attached to the bolting flange of the existing manway. A seal may be provided for creating a leakproof joint between the cover and a cover receiving surface when the hingedly attached manhole cover is in a closed position. A manway having a hingedly attached manhole cover may be provided with a hinge frame. A locking assembly may be provided adjacent the cover that includes a locking and sealing element for engaging the cover with a seal for locking and sealing the manway.
    Type: Grant
    Filed: December 2, 2003
    Date of Patent: November 22, 2005
    Assignee: The Stebbins Engineering and Manufacturing Company
    Inventor: Mark D. Robinson
  • Patent number: 6941987
    Abstract: Apparatus for processing logs to manufacture wood chips. The apparatus includes a circular disc for passing a series of blades through a chipping station and a chute and spout assembly for feeding logs from a conveyor into the chipping station. A lifting mechanism is mounted for rotation upon a shaft which is situated adjacent to but outside of the chute and spout assembly. A drive unit is arranged to turn the shaft so that the lifting mechanism is rotated between a retracted position outside of the flow described by the chute and spout assembly and an extended position inside the chute and spout assembly whereby the lifting mechanism can contact logs within the assembly and move the logs contra to the direction of flow.
    Type: Grant
    Filed: June 9, 2003
    Date of Patent: September 13, 2005
    Assignee: CEM Machine, Inc.
    Inventor: Mark D. Robinson
  • Publication number: 20040257908
    Abstract: A mixing head assembly comprising a housing having an input mix chamber passageway and a non-perpendicular output passageway. The assembly also includes a first input including a first nozzle for injecting a first fluid into the input mix chamber passageway and a second nozzle for injecting a second fluid into the input mix chamber passageway whereby the second fluid can mix with the first fluid to form a mixed fluid. The first nozzle and the second nozzle are configured to inject the first fluid and the second fluid into the input mix chamber passageway such that the first fluid and the second fluid meet at an intersection point. The first axial line and the second axial line are neither co-linear nor co-planar. Furthermore, an intersection point of the first fluid and the second fluid is not located along a longitudinal axis of the input mix chamber passageway.
    Type: Application
    Filed: June 20, 2003
    Publication date: December 23, 2004
    Inventors: Gordon W. Breuker, Mark D. Robinson
  • Publication number: 20040244870
    Abstract: Apparatus for processing logs to manufacture wood chips. The apparatus includes a circular disc for passing a series of blades through a chipping station and a chute and spout assembly for feeding logs from a conveyor into the chipping station. A lifting mechanism is mounted for rotation upon a shaft which is situated adjacent to but outside of the chute and spout assembly. A drive unit is arranged to turn the shaft so that the lifting mechanism is rotated between a retracted position outside of the flow described by the chute and spout assembly and an extended position inside the chute and spout assembly whereby the lifting mechanism can contact logs within the assembly and move the logs contra to the direction of flow.
    Type: Application
    Filed: June 9, 2003
    Publication date: December 9, 2004
    Applicant: CEM Machine, Inc.
    Inventor: Mark D. Robinson
  • Publication number: 20040109726
    Abstract: Method of replacing a blind flange manhole cover of the type including a bolted on blind flange mounted on a bolting flange of a negative pressure storage tank manway with a manhole cover having a hinged door assembly includes the step of removing the blind flange manhole cover from the bolting flange of a tank-installed manway. The manhole cover may be attached to the bolting flange of the existing manway. A seal may be provided for creating a leakproof joint between the cover and a cover receiving surface when the hingedly attached manhole cover is in a closed position. A manway having a hingedly attached manhole cover may be provided with a hinge frame. A locking assembly may be provided adjacent the cover that includes a locking and sealing element for engaging the cover with a seal for locking and sealing the manway.
    Type: Application
    Filed: December 2, 2003
    Publication date: June 10, 2004
    Inventor: Mark D. Robinson
  • Patent number: 6679651
    Abstract: Method of replacing a blind flange manhole cover of the type including a bolted on blind flange mounted on a bolting flange of a negative pressure storage tank manway with a manhole cover having a hinged door assembly includes the step of removing the blind flange manhole cover from the bolting flange of a tank-installed manway. The manhole cover may be attached to the bolting flange of the existing manway. A seal may be provided for creating a leakproof joint between the cover and a cover receiving surface when the hingedly attached manhole cover is in a closed position. A manway having a hingedly attached manhole cover may be provided with a hinge frame. A locking assembly may be provided adjacent the cover that includes a locking and sealing element for engaging the cover with a seal for locking and sealing the manway.
    Type: Grant
    Filed: April 9, 2002
    Date of Patent: January 20, 2004
    Assignee: The Stebbins Engineering and Manufacturing Company
    Inventor: Mark D. Robinson
  • Publication number: 20020176742
    Abstract: Method of replacing a blind flange manhole cover of the type including a bolted on blind flange mounted on a bolting flange of a negative pressure storage tank manway with a manhole cover having a hinged door assembly includes the step of removing the blind flange manhole cover from the bolting flange of a tank-installed manway. The manhole cover may be attached to the bolting flange of the existing manway. A seal may be provided for creating a leakproof joint between the cover and a cover receiving surface when the hingedly attached manhole cover is in a closed position. A manway having a hingedly attached manhole cover may be provided with a hinge frame. A locking assembly may be provided adjacent the cover that includes a locking and sealing element for engaging the cover with a seal for locking and sealing the manway.
    Type: Application
    Filed: April 9, 2002
    Publication date: November 28, 2002
    Inventor: Mark D. Robinson
  • Patent number: 6109823
    Abstract: A method of replacing an outwardly opening manhole cover that provides access to the interior of a tank or the like with an inwardly opening cover that includes the steps of removing the outwardly opening cover from the bolting flange of a tank installed manway and attaching a mounting flange to the manway bolting flange. A pair of hinges are connected to the mounting flange and an inwardly opening cover assembly is rotatably mounted on the hinges. The cover of the assembly is arranged to close and seal against either the mounting flange or the inner rim of the existing manway.
    Type: Grant
    Filed: November 20, 1998
    Date of Patent: August 29, 2000
    Assignee: Stebbins Engineering & Manufacturing Co.
    Inventors: Daniel J. Halferty, Mark D. Robinson
  • Patent number: 6035797
    Abstract: An improved float drum for marine structures which includes a floatation material in the interior of the float drum which conforms to the interior surfaces of the walls of the float drum. The float drum also includes a fluid regulator to prevent a build-up of gasses in the interior of the float drum from deforming or damaging the float drum. The float drum also designed conveniently accommodate dock utility systems.
    Type: Grant
    Filed: June 8, 1998
    Date of Patent: March 14, 2000
    Assignee: The Louis Berkman Company
    Inventor: Mark D. Robinson
  • Patent number: 5671693
    Abstract: A pontoon boat mooring system is provided which comprises first and second rigid spacing members pivotably mounted in a spaced-apart relation at the edge of a dock. One or both of the spacing members may also be mounted for lateral movement relative to the dock to allow for use with boats of different widths. In use the spacing members are pivoted toward the mooring eyes on the forward portions of the pontoons and connected thereto by a pin which passes through two parallel portions of the spacing members and the mooring eye.
    Type: Grant
    Filed: June 4, 1996
    Date of Patent: September 30, 1997
    Assignee: The Louis Berkman Company
    Inventor: Mark D. Robinson
  • Patent number: 5348064
    Abstract: A chipper employs a rotary cutting disk with a plurality of radial knife assemblies. Each knife assembly has a reversible blade of generally trapezoidal cross section. The assembly has a knife holder and a knife clamp that sandwich the blade between them. An elongated load bar is seated in a recess in the clamp and supports a sloping surface at a concealed edge of the blade.
    Type: Grant
    Filed: September 7, 1993
    Date of Patent: September 20, 1994
    Assignee: Carthage Machine Company
    Inventors: Timothy P. Nettles, Scott J. Boliver, Mark D. Robinson
  • Patent number: 5139063
    Abstract: A chipper for cutting uniform chips from a log has a sliver ring mounted on the rotary disc radially outside the cutting blade assemblies, and also has cooperating arcuate wrapper member and special sliver bedknife mounted on the front plate of the chipper housing. The wrapper member is concentric with the sliver ring and extends circumferentially around it for a distance, and also extends axially towards the disc and beyond the proximal face of the sliver ring to define a radial gap between the ring and the wrapper. The sliver bedknife extends across the face of the disc from one end of the arcuate wrapper. The sliver bedknife, the wrapper, and the sliver ring cooperate with one another to limit progression of slivers that are formed from wooden logs at the position of the stationary bedknife.
    Type: Grant
    Filed: December 6, 1991
    Date of Patent: August 18, 1992
    Assignee: Carthage Machine Company
    Inventors: Timothy P. Nettles, Mark D. Robinson