Patents by Inventor Sigvard V. Soderstrom

Sigvard V. Soderstrom 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).

  • Activating apparatus in a liquid conveying system operated by vacuum, preferably a so-called vacuum sewage system
    Patent number: 4511117
    Abstract: An activating apparatus or device, for example for a valve in a liquid conveying system operated by means of a vacuum. The activating apparatus comprises a normally latched or locked operating device which by means of a spring, or the like, is connected to a force accumulator. The force accumulator is moved by the influence of vacuum and thereby tightens the spring which, when a lock arm disengages from the operating device, is released so that the operating device is moved, and thereby opens the valve.
    Type: Grant
    Filed: December 8, 1983
    Date of Patent: April 16, 1985
    Assignee: Aktiebolaget Electrolux
    Inventor: Sigvard V. Soderstrom
  • Waste water conveyance apparatus
    Patent number: 4280528
    Abstract: An arrangement for conveyance of waste water or liquid by vacuum operation, including a vertically movable container in which the waste water is collected. By causing the weight of the liquid to surmount a spring force and a force originating from the vacuum in the pipeline system an inlet for the waste water is opened. The waste water present in the container is then drawn into the conduit system by means of the vacuum present therein.
    Type: Grant
    Filed: April 9, 1980
    Date of Patent: July 28, 1981
    Assignee: Aktiebolaget Electrolux
    Inventor: Sigvard V. Soderstrom