Patents by Inventor Peter Lagergren

Peter Lagergren 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).

  • Ultrasonic fuel level monitoring system incorporating an acoustic lens
    Patent number: 7905143
    Abstract: An ultrasonic liquid level monitoring system includes an ultrasonic transducer unit that is mountable to a tank. The unit has an emitter to generate an ultrasonic beam passing through the wall of the tank. The emitter further receives an echo of the ultrasonic beam off a liquid surface. An acoustic lens is disposed between the emitter and the tank wall to receive and shape the ultrasonic beam to compensate for lensing effects of the tank wall.
    Type: Grant
    Filed: July 23, 2007
    Date of Patent: March 15, 2011
    Assignee: Schmitt Measurement Systems, Inc.
    Inventor: Peter Lagergren
  • Ultrasonic fuel level monitoring system incorporating an acoustic lens
    Publication number: 20090025474
    Abstract: An ultrasonic liquid level monitoring system includes an ultrasonic transducer unit that is mountable to a tank. The unit has an emitter to generate an ultrasonic beam passing through the wall of the tank. The emitter further receives an echo of the ultrasonic beam off a liquid surface. An acoustic lens is disposed between the emitter and the tank wall to receive and shape the ultrasonic beam to compensate for lensing effects of the tank wall.
    Type: Application
    Filed: July 23, 2007
    Publication date: January 29, 2009
    Inventor: Peter Lagergren
  • Utility model billing system for propane and heating oil consumers
    Publication number: 20050289021
    Abstract: The invention describes a method whereby the measured consumption of propane and heating oil fuels can be used to provide a repetitive “utility style” billing method for consumers. The method involves the use of measurement methods that provide a close estimate of actual liquid volume in a fuel container and reconciles that measurement with the amount delivered to the consumer with each inventory replenishment cycle that uses an approved custody transfer meter.
    Type: Application
    Filed: May 16, 2005
    Publication date: December 29, 2005
    Inventor: Peter Lagergren
  • Ultrasonic fuel level monitoring device
    Publication number: 20050284218
    Abstract: The invention describes a method of altering the transmitted frequency used in an ultrasonic ranging system for liquid level measurement in a fuel tank. The frequency agility of the system is an important component of performing liquid level measurement in an enclosed vessel.
    Type: Application
    Filed: May 16, 2005
    Publication date: December 29, 2005
    Inventor: Peter Lagergren
  • Novel method of exciting a piezoelectric crystal
    Publication number: 20050275308
    Abstract: The invention describes the use of an electrical pulse that is a single square wave to excite a piezoelectric crystal. This pulse is applied alternately to either side of the crystal at twice the nominal resonant frequency of the crystal. This method provides a significant increase in net drive power to the crystal without the need to provide a sine wave excitation of plus and minus voltage to the crystal.
    Type: Application
    Filed: May 16, 2005
    Publication date: December 15, 2005
    Inventors: Peter Lagergren, Steven Kazemir