Patents by Inventor Frederick J. Luft

Frederick J. Luft has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Mass flowmeter and laminar flow elements for use therein
    Patent number: 5824894
    Abstract: The disclosed mass flowmeter includes a section defining a passageway and a laminar flow element disposed within the passageway so as to define a laminar flow channel within the passageway. The maximum cross sectional dimension of the laminar flow element is smaller than the maximum cross sectional dimension of the passageway. In one embodiment the flowmeter includes a device for mounting the laminar flow element within the passageway so that the laminar flow element contacts at least a portion of an inner surface of the passageway so that various sized laminar flow elements can easily and reliably be substituted for one another so as to select the mass flow rate through the channel. In a second embodiment the laminar flow element includes two support segments which are fitted within the passageway and support a central segment which defines within the passageway the laminar flow channel.
    Type: Grant
    Filed: May 7, 1997
    Date of Patent: October 20, 1998
    Assignee: MKS Instruments, Inc.
    Inventors: Paul D. Lucas, Frederick J. Luft, Ting Huang