Patents by Inventor Johan Cornelis Phaff

Johan Cornelis Phaff 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).

  • Method and system for testing airtightness of a building envelope
    Patent number: 10545067
    Abstract: A method and system for testing airtightness of a building envelope (10). An air flow generator (21) is provided that is switchable between at least two different flow rates (Q0,Q1). The air flow generator (21) is repeatedly switched between a first flow rate (Q0) and a second flow rate (Q1) for modulating the building pressure (P1) as a function of time (t) between respective equilibrium pressure values at the first flow rate (Q0) and the second flow rate (Q1). The relative building pressure (?P) is measured by a differential pressure transducer (31) and recorded as a function of time (t). A pressure modulation amplitude (?Pmodulation) is calculated for providing a measure of the airtightness.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: January 28, 2020
    Assignee: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
    Inventors: Johan Cornelis Phaff, Wouter Antonius Borsboom, Bastiaan Knoll
  • METHOD AND SYSTEM FOR TESTING AIRTIGHTNESS OF A BUILDING ENVELOPE
    Publication number: 20180024025
    Abstract: A method and system for testing airtightness of a building envelope (10). An air flow generator (21) is provided that is switchable between at least two different flow rates (Q0,Q1). The air flow generator (21) is repeatedly switched between a first flow rate (Q0) and a second flow rate (Q1) for modulating the building pressure (P1) as a function of time (t) between respective equilibrium pressure values at the first flow rate (Q0) and the second flow rate (Q1). The relative building pressure (?P) is measured by a differential pressure transducer (31) and recorded as a function of time (t). A pressure modulation amplitude (?Pmodulation) is calculated for providing a measure of the airtightness.
    Type: Application
    Filed: February 8, 2016
    Publication date: January 25, 2018
    Inventors: Johan Cornelis Phaff, Wouter Antonius Borsboom, Bastiaan Knoll