Patents by Inventor Robert C. Rajewski

Robert C. Rajewski 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).

  • Patent number: 6082390
    Abstract: A gas blanket controller, comprising a housing defining a chamber sealed with a diaphragm on a first side of the chamber, and a fitting for a tank outlet on another side of the chamber; a rod secured to the diaphragm for movement with the diaphragm; a rod guide secured to the housing, the rod being guided by the rod guide; weights secured to the rod providing a force resisting movement of the rod; a control linkage secured to the rod; a microswitch mounted on the housing, the microswitch having a toggle that is actuated by the control linkage; a gas blanket supply line; a gas blanket motor control valve on the gas blanket supply line; a communication link between the microswitch and the gas blanket motor control valve; and the rod having a range of motion such that the toggle is operable by contact with the control linkage, whereby the microswitch opens and closes the gas blanket control valve upon operation of the toggle.
    Type: Grant
    Filed: October 7, 1998
    Date of Patent: July 4, 2000
    Inventor: Robert C. Rajewski
  • Patent number: 5871162
    Abstract: A truck-mounted paper shredder is provided. The shredder uses a reciprocating plunger to feed a rotary hammer mill, which shreds the paper. An auger is used to transfer the shredded paper into a discrete storage container. The container includes a suction device to pull dust through the assembly into a filter in the container. The container is separate so that it can be removed when loaded and left standing for later pick up, allowing the truck and shredder to take on an empty container and move on to the next job.
    Type: Grant
    Filed: January 2, 1998
    Date of Patent: February 16, 1999
    Assignee: Robert C. Rajewski
    Inventor: Robert C. Rajewski
  • Patent number: 4854855
    Abstract: A flare igniter assembly comprises an elongated tubing assembly including a first air supply conduit and a fuel gas supply line enclosed inside of said first air supply conduit. The fuel gas supply line is provided with a member having a venturi-type orifice through which fuel gas and intake air pass, the orifice effectes initial mixing of fuel gas and air. The fuel gas supply line further includes a combustion zone and means for transferring a fuel gas-air mixture downstream from the orifice to the combustion zone. The combustion zone includes an inspirating baffle member firmly positioned within the fuel gas supply line. The baffle member is so constructed as to effect further thorough mixing of the fuel-gas mixture as it passes therethrough prior to combustion of the mixture in combustion zone.
    Type: Grant
    Filed: March 18, 1988
    Date of Patent: August 8, 1989
    Inventor: Robert C. Rajewski