Patents Assigned to Elasto Form
  • Bicycle helmet
    Patent number: 5687426
    Abstract: A bicycle helmet including a pair of spaced synthetic plastic shells and contains an opening having an annular wall surface connecting the shells, the annular wall being successively axially convergent and divergent, thereby to reinforce the helmet, and to afford circulation of air to the user's head.
    Type: Grant
    Filed: August 28, 1996
    Date of Patent: November 18, 1997
    Assignee: Elasto Form
    Inventor: Gerhard Sperber