Patents by Inventor Darren M. Mark

Darren M. Mark 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: 6585320
    Abstract: An improved tilt rate control mechanism for a tilt back chair has an adjustable torsion spring, a tilt rate adjustment actuator and an actuator movement mechanism. The torsion spring has an adjustment lever for adjusting the tension on the torsion spring. The tilt rate adjustment actuator is disposed in contact with the adjustment lever such that the movement of the adjustment actuator causes movement of the adjustment lever. The adjustment actuator is moveable between (i) a first actuator position wherein the actuator is proximal to the torsion spring and the adjustment lever is in a minimum tension position, and (ii) a second actuator position wherein the actuator is distal from the torsion spring and the adjustment lever is in a maximum tension position.
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: July 1, 2003
    Assignee: Virco Mgmt. Corporation
    Inventors: Richard M. Holbrook, Darren M. Mark
  • Publication number: 20020190555
    Abstract: An improved tilt rate control mechanism for a tilt back chair has an adjustable torsion spring, a tilt rate adjustment actuator and an actuator movement mechanism. The torsion spring has an adjustment lever for adjusting the tension on the torsion spring. The tilt rate adjustment actuator is disposed in contact with the adjustment lever such that the movement of the adjustment actuator causes movement of the adjustment lever. The adjustment actuator is moveable between (i) a first actuator position wherein the actuator is proximal to the torsion spring and the adjustment lever is in a minimum tension position, and (ii) a second actuator position wherein the actuator is distal from the torsion spring and the adjustment lever is in a maximum tension position.
    Type: Application
    Filed: June 15, 2001
    Publication date: December 19, 2002
    Inventors: Richard M. Holbrook, Darren M. Mark
  • Publication number: 20020189051
    Abstract: The present invention provides a caster assembly having at least one caster wheel attached to a wheel axis that is, in turn, attached to a caster body having an attachment assembly. A cogwheel is attached to each of the at least one caster wheels, wherein each cogwheel has a plurality of radially outwardly extending cogs and a plurality of cog recesses, wherein each pair of adjacent cogs defines a cog recess therebetween.
    Type: Application
    Filed: June 5, 2002
    Publication date: December 19, 2002
    Inventors: Richard M. Holbrook, Darren M. Mark
  • Publication number: 20020178540
    Abstract: The present invention provides a caster assembly having at least one caster wheel attached to a wheel axle that is, in turn, attached to a caster body, wherein the caster body has at least one cap-orientation indexing rib and at least one indention. A connector assembly having at least one indexing slot for receiving the at least one indexing rib of the caster body and at least one detent element for forming an interlocking connection with the at least one indention of the caster body is also to the caster body. The connector assembly is also attached to a caster cap, such that the caster cap is attached to the caster body.
    Type: Application
    Filed: June 5, 2002
    Publication date: December 5, 2002
    Inventors: Richard M. Holbrook, Darren M. Mark
  • Patent number: D438934
    Type: Grant
    Filed: February 17, 2000
    Date of Patent: March 13, 2001
    Assignee: Emhart Inc.
    Inventors: Darren M. Mark, Jerome F. Czerwinski, Jr., Alvin Tolosa
  • Patent number: D438935
    Type: Grant
    Filed: February 17, 2000
    Date of Patent: March 13, 2001
    Assignee: Emhart Inc.
    Inventors: Darren M. Mark, Jerome F. Czerwinski, Jr., Alvin Tolosa
  • Patent number: D441836
    Type: Grant
    Filed: February 17, 2000
    Date of Patent: May 8, 2001
    Assignee: Emhart Inc.
    Inventors: Darren M. Mark, Jerome F. Czerwinski, Jr., Alvin Tolosa
  • Patent number: D443337
    Type: Grant
    Filed: February 17, 2000
    Date of Patent: June 5, 2001
    Assignee: Emhart Inc.
    Inventors: Darren M. Mark, Jerome F. Czerwinski, Jr., Alvin Tolosa
  • Patent number: D444214
    Type: Grant
    Filed: February 17, 2000
    Date of Patent: June 26, 2001
    Assignee: Emhart Inc.
    Inventors: Darren M. Mark, Jerome F. Czerwinski, Jr.
  • Patent number: D454049
    Type: Grant
    Filed: February 8, 2001
    Date of Patent: March 5, 2002
    Assignee: Emhart Inc.
    Inventors: Zhiqian LaPlume, Anthony J. Carsello, Darren M. Mark
  • Patent number: D456879
    Type: Grant
    Filed: October 10, 1996
    Date of Patent: May 7, 2002
    Assignee: Emhart Inc.
    Inventors: Frederic C. Doughty, Darren M. Mark
  • Patent number: D458666
    Type: Grant
    Filed: August 12, 1998
    Date of Patent: June 11, 2002
    Assignee: Emhart LLC
    Inventors: Darren M. Mark, Alvin Tolosa
  • Patent number: D461322
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: August 13, 2002
    Assignee: Virco Mgmt. Corporation
    Inventors: Richard M. Holbrook, Darren M. Mark
  • Patent number: D461345
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: August 13, 2002
    Assignee: Virco Mgmt. Corporation
    Inventors: Richard M. Holbrook, Darren M. Mark
  • Patent number: D461348
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: August 13, 2002
    Assignee: Virco Mgmt. Corporation
    Inventors: Richard M. Holbrook, Darren M. Mark
  • Patent number: D469265
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: January 28, 2003
    Assignee: Virco Mgmt. Corporation
    Inventors: Richard M. Holbrook, Darren M. Mark
  • Patent number: D469284
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: January 28, 2003
    Assignee: Virco Mgmt. Corporation
    Inventors: Richard M. Holbrook, Darren M. Mark
  • Patent number: D473068
    Type: Grant
    Filed: June 19, 2002
    Date of Patent: April 15, 2003
    Assignee: Virco Mgmt. Corporation
    Inventors: Richard M. Holbrook, Darren M. Mark, Jeffrey Bentzler
  • Patent number: D473399
    Type: Grant
    Filed: June 19, 2002
    Date of Patent: April 22, 2003
    Assignee: Virco Mgmt. Corporation
    Inventors: Richard M. Holbrook, Darren M. Mark, Jeffrey Bentzler
  • Patent number: D474044
    Type: Grant
    Filed: June 19, 2002
    Date of Patent: May 6, 2003
    Assignee: Virco Mgmt. Corporation
    Inventors: Richard M. Holbrook, Darren M. Mark, Jeffrey Bentzler