Patents by Inventor James K. Ritchie

James K. Ritchie 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).

  • Wheelchair and alarm therefor
    Patent number: 6963286
    Abstract: The present invention relates to a wheelchair and an underseat alarm system therefor.
    Type: Grant
    Filed: January 28, 2003
    Date of Patent: November 8, 2005
    Assignee: 210 Innovations LLC
    Inventors: James A. Marquis, James K. Ritchie
  • Wheelchair and alarm therefor
    Publication number: 20030169175
    Abstract: The present invention relates to a wheelchair and an underseat alarm system therefor.
    Type: Application
    Filed: January 28, 2003
    Publication date: September 11, 2003
    Inventors: James A. Marquis, James K. Ritchie
  • Wheelchair automatic anti-rollback assembly
    Patent number: 6371503
    Abstract: An anti-rollback assembly adapted or adaptable for use in combination with a wheelchair. The anti-rollback assembly includes a one-way brake assembly automatically immobilizing the wheelchair against rearward movement when the occupant attempts to rise from or sit in a seat member of the wheelchair, yet at the same time does not prevent the wheelchair from moving in a forward direction. Conversely, when the occupant is fully seated in the seat member, the one-way brake assembly is disengaged so that the wheelchair can move freely in forward or rearward directions. The assembly can be retrofitted onto existing wheelchairs, and is adjustable to fit various size wheelchairs.
    Type: Grant
    Filed: July 24, 2001
    Date of Patent: April 16, 2002
    Assignee: 210 Innovations LLC
    Inventors: James K. Ritchie, James A. Marquis
  • Wheelchair automatic anti-rollback assembly
    Publication number: 20010040354
    Abstract: An anti-rollback assembly adapted or adaptable for use in combination with a wheelchair. The anti-rollback assembly includes a one-way brake assembly automatically immobilizing the wheelchair against rearward movement when the occupant attempts to rise from or sit in a seat member of the wheelchair, yet at the same time does not prevent the wheelchair from moving in a forward direction. Conversely, when the occupant is fully seated in the seat member, the one-way brake assembly is disengaged so that the wheelchair can move freely in forward or rearward directions. The assembly can be retrofitted onto existing wheelchairs, and is adjustable to fit various size wheelchairs.
    Type: Application
    Filed: July 24, 2001
    Publication date: November 15, 2001
    Applicant: 210 INNOVATIONS LLC
    Inventors: James K. Ritchie, James A. Marquis
  • Wheelchair automatic anti-rollback assembly
    Patent number: 6279936
    Abstract: An anti-rollback assembly adapted or adaptable for use in combination with a wheelchair. The anti-rollback assembly includes a one-way brake assembly automatically immobilizing the wheelchair against rearward movement when the occupant attempts to rise from or sit in a seat member of the wheelchair, yet at the same time does not prevent the wheelchair from moving in a forward direction. Conversely, when the occupant is fully seated in the seal member, the one-way brake assembly is disengaged so that the wheelchair can move freely in forward or rearward directions. The assembly can be retrofitted onto existing wheelchairs, and is adjustable to fit various size wheelchairs.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: August 28, 2001
    Assignee: 210 Innovations LLC
    Inventors: James K. Ritchie, James A. Marquis
  • Wheelchair automatic anti-rollback assembly
    Patent number: 6092824
    Abstract: An anti-rollback assembly adapted or adaptable for use in combination with a wheelchair. The anti-rollback assembly includes a one-way brake assembly automatically immobilizing the wheelchair against rearward movement when the occupant attempts to rise from or sit in a seat member of the wheelchair, yet at the same time does not prevent the wheelchair from moving in a forward direction. Conversely, when the occupant is fully seated in the seat member, the one-way brake assembly is disengaged so that the wheelchair can move freely in forward or rearward directions. The assembly can be retrofitted onto existing wheelchairs, and is adjustable to fit various size wheelchairs.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: July 25, 2000
    Assignee: 210 Innovations LLC
    Inventors: James K. Ritchie, James A. Marquis