Patents by Inventor Sten G. Drennow

Sten G. Drennow 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).

  • Device for separating blasting dust from blasting agent
    Patent number: 5107632
    Abstract: The present invention relates to a device for separating blasting dust from blasting agent, whereby separation occurs in a separating space (16) from which the blasting dust (15) is sucked into a dust collecting device (19) while the blasting agent (13) is fed to a recirculating device (12) for recycling thereof, and whereby the blasting dust (15) is sucked into the dust collecting device (19) by generating a negative pressure therein by means of a negative pressure-generating device. In order to eliminate the need for bulky fan devices for generating negative pressures in the dust collecting device, the negative pressure-generating device includes an air guide means (32) which is connected to a compressor (9) and feeds air from said compressor in a direction from a blasting dust inlet (30) towards a collecting container (21) for blasting dust (15).
    Type: Grant
    Filed: February 7, 1990
    Date of Patent: April 28, 1992
    Inventors: Leif E. Stern, Sten G. Drennow
  • Tooth pick
    Patent number: D294072
    Type: Grant
    Filed: May 13, 1985
    Date of Patent: February 2, 1988
    Inventors: Leif E. Stern, Sten G. Drennow