Patents by Inventor Robert Rummelhoff

Robert Rummelhoff 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).

  • Telescopic canning sleeve for forming voids in concrete slabs
    Patent number: 8707641
    Abstract: A two-piece cylindrical telescopic canning sleeve comprising an inner lower member and an upper outer member. The outer member is provided with at least one set of a plurality of engagement devices. The inner lower member is provided with at least one set of a plurality of engagement devices complimentary to the engagement devices provided with the outer member. The telescopic canning sleeve is assembled for use by aligning the engagement devices of the outer member with the engagement devices of the lower member, then sliding the outer member over the inner member until the desired functional height of the canning sleeve is reached after which, the outer member is frictionally engaged with the inner member by twisting the outer sleeve member to the inner member so that the complimentary engagement devices frictionally communicate.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: April 29, 2014
    Assignee: Kanex Patents Ltd.
    Inventor: Robert Rummelhoff
  • Telescopic canning sleeve set for forming voids in concrete slab
    Patent number: D735366
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: July 28, 2015
    Assignee: Kanex Patents Ltd.
    Inventors: Carsten Mide, Robert Rummelhoff