Patents by Inventor J. David Carlson

J. David Carlson 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).

  • Publication number: 20150034433
    Abstract: A magneto-rheological fluid valve includes a magnetic field generator having at least one electromagnetic coil and at least one magnetic pole having a pole length Lm. The magneto-rheological fluid valve further includes at least one flow channel adjacent to the electromagnetic coil. The at least one flow channel has a gap width g, wherein the ratio Lm/g is greater than or equal to 15.
    Type: Application
    Filed: October 3, 2014
    Publication date: February 5, 2015
    Inventors: J. David CARLSON, Mark R. JOLLY, Douglas E. IVERS
  • Patent number: 8602182
    Abstract: The controllable suspension system includes a strut with a magnetorheological fluid damper. The magnetorheological fluid damper includes a longitudinal damper tubular housing having a longitudinally extending axis and an inner wall for containing magnetorheological fluid. The damper includes a piston head movable within the damper tubular housing along a longitudinal length the housing, with the damper piston head providing a first upper variable volume magnetorheological fluid chamber and a second lower variable volume magnetorheological fluid chamber, with a fluid flow gap between the upper and lower fluid chambers, the damper piston having a longitudinal piston rod for supporting the piston head within the housing, with the piston supported within the housing with a piston rod bearing assembly disposed between the housing and the rod, with the piston rod bearing assembly having a piston rod bearing seal interface.
    Type: Grant
    Filed: November 15, 2010
    Date of Patent: December 10, 2013
    Assignee: Lord Corporation
    Inventors: Kenneth Alan St. Clair, William J. McMahon, Robert Marjoram, Mark R. Jolly, J. David Carlson, K. Andrew Kintz
  • Patent number: 8206545
    Abstract: A curable composition comprising magnetically active elastic microspheres that are filled with a curing agent. The elastomeric microspheres are predispersed throughout the curable resin and are magnetostrictive. Cure of the adhesive is initiated when an external magnetic field is applied that physically distorts or ruptures the magnetic microspheres due to a magnetostrictive effect from the magnetic field.
    Type: Grant
    Filed: November 13, 2009
    Date of Patent: June 26, 2012
    Assignee: Lord Corporation
    Inventor: J. David Carlson
  • Publication number: 20110056780
    Abstract: The controllable suspension system includes a strut with a magnetorheological fluid damper. The magnetorheological fluid damper includes a longitudinal damper tubular housing having a longitudinally extending axis and an inner wall for containing magnetorheological fluid. The damper includes a piston head movable within the damper tubular housing along a longitudinal length the housing, with the damper piston head providing a first upper variable volume magnetorheological fluid chamber and a second lower variable volume magnetorheological fluid chamber, with a fluid flow gap between the upper and lower fluid chambers, the damper piston having a longitudinal piston rod for supporting the piston head within the housing, with the piston supported within the housing with a piston rod bearing assembly disposed between the housing and the rod, with the piston rod bearing assembly having a piston rod bearing seal interface.
    Type: Application
    Filed: November 15, 2010
    Publication date: March 10, 2011
    Inventors: KENNETH ALAN ST.CLAIR, William J. McMahon, Robert Marjoram, Mark R. Jolly, J. David Carlson, K. Andrew Kintz
  • Patent number: 7900754
    Abstract: The invention provides a rotating tub washer with an on-off binary damper system for damping a problematic movement between the washer frame and the rotating tub. The on-off binary damper system has a friction pad and a housing friction damper surface, with the friction pad in contact with said housing friction damper surface.
    Type: Grant
    Filed: March 24, 2005
    Date of Patent: March 8, 2011
    Assignee: Lord Corporation
    Inventor: J. David Carlson
  • Publication number: 20110000751
    Abstract: An electromagnetic brake system and brake for controlling motion between a first machine body (32) and a second machine body (34) is provided. The electromagnetic brake system and brake include an interior core member (36), the interior core member coupling with the first body (32). The electromagnetic brake includes an outer exterior member (38), the outer exterior member enclosing the interior core member, the outer exterior member coupling with the second body.
    Type: Application
    Filed: March 16, 2009
    Publication date: January 6, 2011
    Inventors: J. David Carlson, Fernando D. Goncalves
  • Patent number: 7849983
    Abstract: The controllable suspension system includes a strut with a magnetorheological fluid damper. The magnetorheological fluid damper includes a longitudinal damper tubular housing having a longitudinally extending axis and an inner wall for containing magnetorheological fluid.
    Type: Grant
    Filed: May 1, 2007
    Date of Patent: December 14, 2010
    Assignee: Lord Corporation
    Inventors: Kenneth Alan St. Clair, William J. McMahon, Robert Marjoram, Mark R. Jolly, J. David Carlson, K. Andrew Kintz
  • Publication number: 20100137083
    Abstract: A vehicle machine with a belt system and a belt. The belt system includes a tensioner with a tensioner moving member which is movably supported on a tensioner stationary member; a tensioner pulley which is rotatably supported on the tensioner moving member and around which at least a portion of the belt is engaged. The belt system includes a bias member, the bias member biasing the tensioner moving member with the tensioner pulley pressing the belt. The belt system includes a controllable electrical current supply and an electromagnetic brake lock, the electromagnetic brake lock including a brake lock electromagnetic coil and a brake lock magnetic target, the electromagnetic brake lock disposed between the tensioner moving member and the tensioner stationary member wherein a controlled current supplied from the controllable electrical current supply to the brake lock electromagnetic coil inhibits the tensioner moving member from moving relative to the tensioner stationary member.
    Type: Application
    Filed: July 22, 2009
    Publication date: June 3, 2010
    Inventor: J. DAVID CARLSON
  • Publication number: 20100122881
    Abstract: A system that includes a magnetically actuated motion control device comprising a housing defining a cavity and including a slot therethrough. A movable member is located within the cavity and is movable relative to the housing. A magnetic field generator located on either the housing or the movable member causes the housing to press against the movable member to develop a friction force.
    Type: Application
    Filed: December 16, 2009
    Publication date: May 20, 2010
    Inventors: J. David Carlson, Richard Wilder
  • Publication number: 20100116641
    Abstract: A curable composition comprising magnetically active elastic microspheres that are filled with a curing agent. The elastomeric microspheres are predispersed throughout the curable resin and are magnetostrictive. Cure of the adhesive is initiated when an external magnetic field is applied that physically distorts or ruptures the magnetic microspheres due to a magnetostrictive effect from the magnetic field.
    Type: Application
    Filed: November 13, 2009
    Publication date: May 13, 2010
    Inventor: J. David Carlson
  • Patent number: 7637360
    Abstract: A system that includes a magnetically actuated motion control device comprising a housing defining a cavity and including a slot therethrough. A movable member is located within the cavity and is movable relative to the housing. A magnetic field generator located on either the housing or the movable member causes the housing to press against the movable member to develop a friction force.
    Type: Grant
    Filed: March 25, 2004
    Date of Patent: December 29, 2009
    Assignee: Lord Corporation
    Inventors: J. David Carlson, Richard Wilder
  • Publication number: 20090294231
    Abstract: Please replace the Abstract with the following amended Abstract: A magneto-rheological fluid valve includes a magnetic field generator having at least one electromagnetic coil and at least one magnetic pole having a pole length Lm. The magneto-rheological fluid valve further includes at least one flow channel adjacent to the magnetic field generator. The at least one flow channel has a gap width g, wherein the ratio Lm/g is greater than or equal to 15.
    Type: Application
    Filed: June 2, 2009
    Publication date: December 3, 2009
    Applicant: LORD CORPORATION
    Inventors: J. David Carlson, Mark R. Jolly, Douglas E. Ivers
  • Patent number: 7243764
    Abstract: A friction damper with a housing including a cavity. The damper includes a first member disposed in the cavity and movable in the cavity; a second member disposed in the cavity; an intermediate member between the first and second members, the first member being in frictional engagement with the intermediate member; and at least one magnetic field generator mounted to magnetically couple the first and second members thereby maintaining the first member in frictional engagement with the intermediate member and wherein the first member is movable against the intermediate member to generate a damping force.
    Type: Grant
    Filed: March 10, 2006
    Date of Patent: July 17, 2007
    Assignee: Lord Corporation
    Inventor: J. David Carlson
  • Patent number: 7243763
    Abstract: A system that includes a magnetically actuated motion control device comprising a housing defining a cavity and including a slot therethrough. A movable member is located within the cavity and is movable relative to the housing. A magnetic field generator located on either the housing or the movable member causes the housing to press against the movable member to develop a friction force.
    Type: Grant
    Filed: August 25, 2003
    Date of Patent: July 17, 2007
    Assignee: Lord Corporation
    Inventor: J. David Carlson
  • Patent number: 7040467
    Abstract: A friction damper a housing including a cavity formed therein; a first member disposed in said cavity and movable in the cavity; a second member disposed in the cavity; an intermediate member between the first and second members, the first member being in frictional engagement with the intermediate member; and at least one magnetic field generator mounted to magnetically couple the first and second members thereby maintaining the first member in frictional engagement with the intermediate member and wherein the first member is movable against the intermediate member to generate a damping force.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: May 9, 2006
    Assignee: Lord Corporation
    Inventor: J. David Carlson
  • Patent number: 6974000
    Abstract: An apparatus comprising a frame; a member movable relative to said frame; a damping device interconnected between the frame and the movable member; a controller for activating the damper to generate a damping condition at a predetermined member operating condition; and system for activating the damping device at a predetermined operating condition of the moving member during a loss of power to the apparatus. The damping device may comprise a field controllable damper that includes a volume of field controllable fluid, which may in turn comprise magnetorheological fluid for example. The rheology of the field controllable fluid is effected during the application of the field.
    Type: Grant
    Filed: February 20, 2002
    Date of Patent: December 13, 2005
    Assignee: Lord Corporation
    Inventors: J. David Carlson, Michael J. Chrzan, Lynn C. Yanyo, Thomas Peuker
  • Publication number: 20040084259
    Abstract: A system that includes a magnetically actuated motion control device comprising a housing defining a cavity and including a slot therethrough. A movable member is located within the cavity and is movable relative to the housing. A magnetic field generator located on either the housing or the movable member causes the housing to press against the movable member to develop a friction force.
    Type: Application
    Filed: August 25, 2003
    Publication date: May 6, 2004
    Inventor: J. David Carlson
  • Patent number: 6722480
    Abstract: A magnetically actuated motion control device includes a housing defining a cavity and including a slot therethrough. A movable member is located within the cavity and is movable relative to the housing. A magnetic field generator located on either the housing or the movable member causes the housing to press against the movable member to develop a friction force. The flux caused by the magnetic field flows through the housing, the movable member and at least one pole located along the movable member. The at least one pole comprises a first portion having a first axial dimension and a second portion having a second axial dimension where the first axial dimension is greater than the second axial dimension and as a result the magnetic flux through the second portion of the at least one pole has a greater magnitude than the magnetic flux through the first portion of the pole.
    Type: Grant
    Filed: May 7, 2002
    Date of Patent: April 20, 2004
    Assignee: Lord Corporation
    Inventor: J. David Carlson
  • Patent number: 6667679
    Abstract: A temporary joint that includes a first discrete member having a first edge and a first movable coupling means; and a second discrete member having a second edge and a second movable coupling means. When it is necessary to form a joint between the first and second discrete members, the first and second edges are moved into abutment to define a binding edge. Then, the first and second movable coupling means are moved toward the binding edge; and the temporary joint is formed when the first and second movable coupling means are proximate the binding edge. The joint is broken by moving the first and second coupling means away from the binding edge. The first coupling means is comprised of a volume of a field responsive material and the second coupling means is a field producing means such as a magnet. A rigid joint is produced when the field producing supplies a field across the field responsive material.
    Type: Grant
    Filed: April 20, 2001
    Date of Patent: December 23, 2003
    Assignee: Lord Corporation
    Inventors: J. David Carlson, Lynn C. Yanyo
  • Publication number: 20030217901
    Abstract: A friction damper a housing including a cavity formed therein; a first member disposed in said cavity and movable in said cavity; a second member disposed in said cavity; an intermediate member between the first and second members, the first member being in frictional engagement with the intermediate member; and at least one magnetic field generator mounted to magnetically couple the first and second members thereby maintaining the first member in frictional engagement with the intermediate member and wherein the first member is movable against the intermediate member to generate a damping force.
    Type: Application
    Filed: December 15, 2000
    Publication date: November 27, 2003
    Applicant: Lord Corporation
    Inventor: J. David Carlson