Patents by Inventor Egon Karlsson

Egon Karlsson 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: 6341662
    Abstract: A muffler with catalytic converter (1) in which at least one catalytic converter element (2) is located in the muffler so that an essential part of all exhaust gases (3) from the engine are forced to pass through the element (2) and be converted there into cleaned exhaust gases (4). The element is designed as an essentially self-supporting body of catalytic material, which is hollow or partly concave and has inner and outer surfaces (6, 7), e.g. the body is shaped as a circular or non-circular sleeve, or possibly even as a narrowing sleeve (8), a dome-shaped or angular bowl-shaped body (5), and the element is, either directly or via intermediary elements, mounted to a dividing part inside the muffler, such as a partition wall (10), an outlet duct (11) or an inlet duct (12), and the mounting is so arranged that at least one end surface (13, 14) is kept fixed at the same time as the element is supported at the outer surface (7) by at least one part (10, 18, 23, 24), while the inner surface is essentially free.
    Type: Grant
    Filed: April 13, 2000
    Date of Patent: January 29, 2002
    Assignee: Aktiebolaget Electrolux
    Inventor: Egon Karlsson
  • Patent number: 6109026
    Abstract: Muffler with catalytic converter (1) essentially arranged in direct connection with a combustion engine's exhaust port and especially intended for portable working tools such as chain saws. At least one partition (2) is embodied in the muffler, or instance in the form of a baffle (3), and the partition (2) comprises one or several apertures (9, 10), through which the exhaust flow passes in order to flow from one side of the partition to the other side, and the partition is at least partly coated with a catalyzing layer.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: August 29, 2000
    Assignee: Aktiebolaget Electrolux
    Inventors: Egon Karlsson, Ulf Svensson
  • Patent number: 5877461
    Abstract: Muffler (1) for portable working tools, preferably chain saws (2), whereby the muffler is mounted directly onto the cylinder's (16) exhaust gas outlet (3). The muffler's (1) exhaust gas outlet (4) is positioned on an upper side (5) of the muffler, i.e. a side which is turned in the same direction as the cylinder's (16) upper side, and the muffler's exhaust gas outlet (4) is equipped with a deflecting device (6), for instance a bent tube, which deflects the exhaust gas flow (7), so that this leaves the muffler in a plane which is parallel to the muffler's upper side (5). The figure shows the chain saw schematically, without protective covers, guide bar and chain. Its cooling fan (19) blows cooling air (20) over the cylinder and the muffler. The positioning and the design of the exhaust gas outlet facilitate a very favorable dilution of the exhaust gases with the cooling air.
    Type: Grant
    Filed: August 11, 1997
    Date of Patent: March 2, 1999
    Assignee: Aktiebolaget Electrolux
    Inventors: Egon Karlsson, Kent Ludvigsson, Stefan Stark
  • Patent number: 5866859
    Abstract: Muffler with catalytic converter (1) essentially arranged in direct connection with a combustion engine's exhaust port and mainly intended for portable working tools such as chain saws. A spark arrester screen (3), i.e. a structure (3) which at least partly contains a wire mesh (4) and a net (4), usually made of metallic material, is located in the exhaust gas flow downstream a converter element (5). In connection with the spark arrester screen (3), upstream or downstream the screen, flow dividers (8, 13, 9) are arranged.
    Type: Grant
    Filed: August 11, 1997
    Date of Patent: February 2, 1999
    Assignee: Aktiebolaget Electrolux
    Inventors: Egon Karlsson, Robin Wastberg
  • Patent number: 5736690
    Abstract: Muffler with catalytic converter (1) composed of a muffler housing (2) and a lid (3) which seals the muffler housing. A catalytic converter element is mounted in the lid and an exhaust pipe (5) leads from this element out of the muffler (1). The exhaust gas pipe (5) is located entirely in the lid, so that the exhaust gases are released via the lid (3).
    Type: Grant
    Filed: January 17, 1997
    Date of Patent: April 7, 1998
    Assignee: Aktiebolaget Electrolux
    Inventor: Egon Karlsson