Patents Examined by Donald O. Woddiel
  • Piezoelectric pressure sensor
    Patent number: 5142914
    Abstract: A piezoelectric pressure sensor is provided with a sensor housing including an inner sensor housing, accommodating an piezoelectric element, and an outer sensor housing threaded to a test article. The inner sensor housing is attached to the outer sensor housing in such a manner that a prestress applied to the piezoelectric element does not change due to an axial strain in the outer sensor housing. The axial strain is produced when the outer sensor housing is mounted to a test article.
    Type: Grant
    Filed: October 29, 1990
    Date of Patent: September 1, 1992
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroki Kusakabe, Masuo Takigawa