Patents by Inventor Thomas Donal Walsh

Thomas Donal Walsh 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).

  • Trolley wheel mechanism
    Patent number: 6843349
    Abstract: A trolley wheel mechanism has two caster wheel assemblies each having a pair of wheels mounted on a rotatable housing. In a free mode the wheels are free to both rotate and to swivel. This is caused by the user pressing a release pedal. In a unidirectional mode a retainer lock engages a brake disc to prevent swivelling of the housing. This is caused by the user pressing both pedals simultaneously. A brake mode is caused by the user pressing the apply pedal.
    Type: Grant
    Filed: May 19, 2003
    Date of Patent: January 18, 2005
    Assignee: Arrow Technology Systems Limited
    Inventors: Thomas Donal Walsh, Patrick Tierney
  • Trolley wheel mechanism
    Publication number: 20040011597
    Abstract: A trolley wheel mechanism (1) has two caster wheel assemblies (2) each having a pair of wheels (15) mounted on a rotatable housing (18). In a free mode the wheels (15) are free to both rotate and to swivel. This is caused by the user pressing a release pedal (4). In a unidirectional mode a retainer lock (19) engages a brake disc (22) to prevent swivelling of the housing (18). This is caused by the user pressing both pedals (4, 5) simultaneously. A brake mode is caused by the user pressing the apply pedal (5).
    Type: Application
    Filed: May 19, 2003
    Publication date: January 22, 2004
    Inventors: Thomas Donal Walsh, Patrick Tierney