Patents Assigned to elfo AG
  • Patent number: 7871528
    Abstract: The water filter including a container, which has a bottom and a cover, wherein several inlets are provided on the border of the cover and an outlet is provided in the centre of the bottom. A spiral channel is located in the container, through which the inlets are connected to the outlet.
    Type: Grant
    Filed: March 15, 2007
    Date of Patent: January 18, 2011
    Assignee: elfo AG
    Inventors: Beat Aregger, Ruedi Gasser
  • Patent number: 4287066
    Abstract: A sieve sheet having radially extending separating slots in order to subdivide the area of the sieve sheet into sieve segments. The separating slots are embedded with plastics material. The sieve segments may be arranged in a configuration differing slightly from a plane, thus stiffening the sieve.
    Type: Grant
    Filed: September 8, 1976
    Date of Patent: September 1, 1981
    Assignee: Elfo AG Sachseln
    Inventors: Albert Greutert, Ernst Stumvoll
  • Patent number: 4259283
    Abstract: The invention relates to a method of manufacturing a sieve which is composed of several planar sieve sheet sections, which are lying adjacent each other and are separated by a plurality of slots and are communicating with one another at a common point. The sieve sheet sections when so arranged are placed into a mold, and thereafter plastics material is introduced into the mold to form ribs that are covering the slots and that are holding in place and stiffening the rims of the sections that form a slot. The sieve sheet may be formed as an integral part or alternatively may be made of several sieve sheet sections that are held together at the peripheral region by connecting means. The plastics ribs covering the slots may be integrally formed with a container holding the sieve sheet.
    Type: Grant
    Filed: April 20, 1979
    Date of Patent: March 31, 1981
    Assignee: Elfo AG Sachseln
    Inventors: Albert Greutert, Ernst Stumvoll