Patents by Inventor Valdemar Antunes Ferreira

Valdemar Antunes Ferreira 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).

  • Interconnected rotary system with built-in suspension for baby prams
    Patent number: 6663121
    Abstract: An interconnected rotary system with built-in suspension is provided for baby prams, intended to provide a use of only two wheels with interconnected steering. This system consists of two rotary suspension blocks (2) supporting the wheels (1) fixed to the chassis on (X) with a suspension spring (5) inside the rotary block (2) and with the rotary points (Y) on which a steering bar (3) is articulated. This new system will allow the use of larger wheels, increasing both the baby and user's comfort.
    Type: Grant
    Filed: June 8, 2001
    Date of Patent: December 16, 2003
    Assignee: Bebecar - Utilidades para Crianca, LDA
    Inventors: Emanuel Fernando Oliveira Santos, Valdemar Antunes Ferreira
  • Interconnected rotary system with built-in suspension for baby prams
    Publication number: 20020000701
    Abstract: An interconnected rotary system with built-in suspension is provided for baby prams, intended to provide a use of only two wheels with interconnected steering. This system consists of two rotary suspension blocks (2) supporting the wheels (1) fixed to the chassis on (X) with a suspension spring (5) inside the rotary block (2) and with the rotary points (Y) on which a steering bar (3) is articulated. This new system will allow the use of larger wheels, increasing both the baby and user's comfort.
    Type: Application
    Filed: June 8, 2001
    Publication date: January 3, 2002
    Applicant: BEBECAR - UTILIDADES PARA CRIANCA, LDA.
    Inventors: Emanuel Fernando Oliveira Santos, Valdemar Antunes Ferreira