Patents Assigned to Jerbron Limited
  • Door control device
    Patent number: 5487206
    Abstract: A door closing device comprises a piston (12) having at one end a seal (21) which seals the interface between the piston and a housing (10). The seal (21) also acts as a one-way valve and carries a pressure relief valve (37).
    Type: Grant
    Filed: January 16, 1994
    Date of Patent: January 30, 1996
    Assignee: Jerbron Limited
    Inventors: Peter E. Brown, Stephen J. Harrison