Patents Assigned to A/S Norlett
  • Ventilator with heat exchanger
    Patent number: 4196771
    Abstract: A ventilator having a rotating drumlike heat exchanging fan and a housing with separation walls and a stationary conical member arranged in the hollow of the fan. Separation walls cooperating with external and internal sides of the fan have lips arranged according to the specification.
    Type: Grant
    Filed: September 12, 1977
    Date of Patent: April 8, 1980
    Assignee: A/S Norlett
    Inventor: Per Nitteberg