Patents Assigned to Olson Engineering Inc.
  • Modulating air control valve
    Patent number: 4160433
    Abstract: An improved modulating air control valve which intermittently introduces air into the intake manifold of internal combustion engines as a function of the vacuum differential between the intake manifold and the ported vacuum at the carburetor. The valve includes a unidirectional flow valve which prevents hydrocarbon gases contained in the intake manifold from deteriorating the internal diaphragm of the valve.
    Type: Grant
    Filed: February 17, 1978
    Date of Patent: July 10, 1979
    Assignee: Olson Engineering Inc.
    Inventor: Donel R. Olson