Patents by Inventor Aarne T. Haas

Aarne T. Haas 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).

  • Patent number: 4530247
    Abstract: A timed gas metering and distribution system provides a point of use metering and an individual remote meter readout capability in a branched-line gas distribution system, such as in a multi-unit apartment building. In such a system, a single main gas line enters the building and has branches of minimal length extending to a gas-fueled appliance, e.g., a heater, in each unit. Each heater has a fixed orifice in its gas line, to provide a specified fixed gas flow rate at a constant line pressure and an electrical pressure switch in its manifold to detect pressure changes and actuate an electrical circuit upon operation of the heater. The circuit transmits an electrical signal to a timing meter located remotely of the unit for convenient reading. One embodiment uses a direct current electrical circuit and a digitally controlled analog run-time meter. A second embodiment uses an oscillator low frequency pulsing circuit, shift register, and digital counter.
    Type: Grant
    Filed: March 15, 1983
    Date of Patent: July 23, 1985
    Assignee: Northwest Natural Gas Company
    Inventor: Aarne T. Haas