Patents by Inventor Kaj Palmovist

Kaj Palmovist 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).

  • Apparatus for controlling the activation and de-activation of a vacuum assembly connected to a conduit system
    Patent number: 4225272
    Abstract: An apparatus for controlling the activation and deactivation of a vacuum assembly which is connected to a conduit system such as a suction conveyance system or a central cleaning system for maintaining a partial vacuum in the conduit system which has suction sockets which may be opened for coupling in vacuum-driven appliances and which are preferably self-closing when the vacuum-driven assemblies are disconnected is provided with a first sensing device and a second sensing device. The first sensing device is operative to sense that state in which all of the suction sockets are closed, in order to emit a stop signal to the vacuum assembly. The second sensing device is operative to sense the opening of one or more suction sockets, in order to emit a start signal to the vacuum assembly.
    Type: Grant
    Filed: February 8, 1979
    Date of Patent: September 30, 1980
    Inventor: Kaj Palmovist