Patents by Inventor Roland E. Küper

Roland E. Küper 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: 7273151
    Abstract: The invention pertains to a sieve bed for a sifting machine, consisting of rectangular sieve elements (10), which are attached to a support frame (1) with their edges abutting each other, the support frame being provided with mushroom-shaped mounting pins (3), each of which is provided with a head which engages in an interlocking manner in corresponding recesses (11a and 11b) of the sieve elements (10). To facilitate the assembly and disassembly of the sieve elements in a sieve bed of this type and to protect the connection from premature wear the invention proposes that the receptacle (11) for the head (4) of the mounting pin (3) be closed off at the top; that the receptacle (11) for the head (4) of the mounting pin (3) be provided at the bottom with an entrance opening for the head (4) of the mounting pin (3); and that the wall of the receptacle (11) be provided with an inward-projecting bead (12), which can be snapped under the head (4) of the mounting pin (3).
    Type: Grant
    Filed: October 2, 2003
    Date of Patent: September 25, 2007
    Assignee: Durex Products, Inc.
    Inventors: Kirk Sawall, David H. Ditlefsen, Roland E. Küper
  • Patent number: 6634505
    Abstract: The invention pertains to a sieve bed for a sifting machine, consisting of rectangular sieve elements (10), which are attached to a support frame (1) with their edges abutting each other, the support frame being provided with mushroom-shaped mounting pins (3), each of which is provided with a head which engages in an interlocking manner in corresponding recesses (11a and 11b) of the sieve elements (10). To facilitate the assembly and disassembly of the sieve elements in a sieve bed of this type and to protect the connection from premature wear the invention proposes that the receptacle (11) for the head (4) of the mounting pin (3) be closed off at the top; that the receptacle (11) for the head (4) of the mounting pin (3) be provided at the bottom with an entrance opening for the head (4) of the mounting pin (3); and that the wall of the receptacle (11) be provided with an inward-projecting bed (12), which can be snapped under the head (4) of the mounting pin (3).
    Type: Grant
    Filed: February 13, 2002
    Date of Patent: October 21, 2003
    Assignee: Durex Products, Inc.
    Inventors: Kirk Sawall, David H. Ditlefsen, Roland E. Küper
  • Patent number: D445437
    Type: Grant
    Filed: April 26, 2000
    Date of Patent: July 24, 2001
    Inventors: Kirk Sawall, David Henry Ditlefsen, Roland E. Küper