Patents Assigned to E. C. Hopkins Limited
  • Inflatable articles
    Patent number: 4498881
    Abstract: An inflatable article adapted for automatic inflation, for example a life jacket, an inflatable suit, or a life raft. The article has a compressed gas cylinder for inflating the article with a gas, and a diaphragm for comparing the ambient fluid pressure with the internal gas pressure in a closed flexible compartment such as the internal space of the article and for activating the article automatically when the ambient fluid pressure exceeds by a predetermined amount the internal gas pressure in the compartment.
    Type: Grant
    Filed: September 16, 1981
    Date of Patent: February 12, 1985
    Assignee: E. C. Hopkins Limited
    Inventor: Brain L. Buckle