Patents by Inventor Thomas Hannus

Thomas Hannus 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).

  • Pneumatic brake booster with variable force transmission ratio
    Patent number: 6494125
    Abstract: A pneumatic brake booster (10) comprises a control valve (22) for controlling a pneumatic pressure difference, a force input element (24) for actuating the control valve (22), a force output element (38) for transmitting the braking force, a reaction disk (34) made of elastomeric material disposed between the force output element (38) and the force input element (24), and a device, which is disposed between the reaction disk (34) and the force input element (24) and acts upon the reaction disk (34), for varying the force transmission ratio between force input element (24) and force output element (38) in dependence upon the force exerted on the force input element (24). For a less expensive design and greater ease of assembly, the device for varying the force transmission ratio is designed as a preassembly unit in the form of a cartridge (30), which after preassembly is insertable into the control valve (22).
    Type: Grant
    Filed: October 10, 2001
    Date of Patent: December 17, 2002
    Assignee: Lucas Industries public limited company
    Inventors: Thomas Hannus, Gerd Puscher
  • Pneumatic brake booster with variable force transmission ratio
    Publication number: 20020020285
    Abstract: A pneumatic brake booster (10) comprises a control valve (22) for controlling a pneumatic pressure difference, a force input element (24) for actuating the control valve (22), a force output element (38) for transmitting the braking force, a reaction disk (34) made of elastomeric material disposed between the force output element (38) and the force input element (24), and a device, which is disposed between the reaction disk (34) and the force input element (24) and acts upon the reaction disk (34), for varying the force transmission ratio between force input element (24) and force output element (38) in dependence upon the force exerted on the force input element (24). For a less expensive design and greater ease of assembly, the device for varying the force transmission ratio is designed as a preassembly unit in the form of a cartridge (30), which after preassembly is insertable into the control valve (22).
    Type: Application
    Filed: October 10, 2001
    Publication date: February 21, 2002
    Inventors: Thomas Hannus, Gerd Puscher