Patents Assigned to Haenni Instruments AG
  • Patent number: 10041826
    Abstract: A force sensor device (200) for detecting a weight of a vehicle. The force sensor device (200) includes an elongated sensor mount (2) with a plurality of hollow sections (3) arranged at least partially overlappingly in the elongated sensor mount (2). A force strip sensor (1) is arranged in each hollow section (3).
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: August 7, 2018
    Assignee: HAENNI INSTRUMENTS AG
    Inventors: Daniel Kneubühl, Christian Maurer
  • Patent number: 6484586
    Abstract: A differential pressure transducer has a measurement chamber which is divided by a membrane into first and second measurement spaces which can be exposed to first and second pressures whereby differential pressure causes deflection of the membrane from its neutral position. A deflection sensor measures the deflection of the membrane and produces a deflection signal. An electromagnet arrangement produces a magnetic force which compensates for the deflection force which is caused by the differential pressure. The coil current for producing the magnetic compensation force represents a measure of the differential pressure.
    Type: Grant
    Filed: February 14, 2000
    Date of Patent: November 26, 2002
    Assignee: Haenni Instruments AG
    Inventors: Bertrand Dutoit, Andreas Friedrich, Kurt Hug, Radivojc Popovic
  • Patent number: 6339962
    Abstract: A force sensor has an elastically deformable carrier (10; 110) which absorbs the force to be measured and on which there are a first and a second strain measurement element (21, 31; 121, 131) arranged such that the elastic deformation of the carrier (10; 110) which is caused by the force leads to different elongations in the two strain measurement elements (21, 31; 121, 131). This difference in elongations is used as a measure for the force to be measured. The force sensor as claimed in the invention is largely immune to disruptive ambient influences such as temperature changes, electromagnetic interference, tensile, compressive and/or shearing forces in the lengthwise direction of the tube, shearing forces transversely to the lengthwise direction of the tube, etc. Wheel load scales with several force sensors as claimed in the invention have such a short response time that it enables measurement of the wheel loads of moving vehicles.
    Type: Grant
    Filed: May 11, 2000
    Date of Patent: January 22, 2002
    Assignee: Haenni Instruments AG
    Inventors: Felix Scheuter, Christian Maurer