Patents by Inventor Gerd Koopmann

Gerd Koopmann 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).

  • Differential bellows pressure switch
    Patent number: 4605832
    Abstract: A differential pressure switch with a housing having two faces opposite each other which comprises two approximately coaxial bellows arranged in the housing, so that each bellows has one of its sides securely fastened to a face of the housing, with a dividing sheet arranged between the bellows such that two separated work chambers are formed. Each work chamber is defined by one face of the housing, by a bellows and by the dividing sheet. The dividing sheet has a section projecting sideways through the bellows for switch control.
    Type: Grant
    Filed: June 4, 1984
    Date of Patent: August 12, 1986
    Assignee: Leybold Heraeus GmbH
    Inventor: Gerd Koopmann