Patents by Inventor Andreas Wulff

Andreas Wulff 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).

  • Flame-proof housing
    Patent number: 8987592
    Abstract: A flame-proof housing (10) of the protection type ex-d is made from two sheet metal blanks that are bent in a u-shaped fashion. They then are fitted into one another and subsequently welded together by means of a peripheral fillet weld without welding seam preparation. A large opening (28) can be provided on one side of the housing (10), which can be closed with a threaded cover or with a flat cover.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: March 24, 2015
    Assignee: Konecranes PLC
    Inventors: Wilhelm Mack, Willy Grübel, Tatjana Kapp, Andreas Wulff, Wilfried Hess
  • PRESSURE-RESISTANT HOUSING
    Publication number: 20130292150
    Abstract: A flame-proof housing (10) of the protection type ex-d is made from two sheet metal blanks that are bent in a u-shaped fashion. They then are fitted into one another and subsequently welded together by means of a peripheral fillet weld without welding seam preparation. A large opening (28) can be provided on one side of the housing (10), which can be closed with a threaded cover or with a flat cover.
    Type: Application
    Filed: March 27, 2012
    Publication date: November 7, 2013
    Applicant: KONECRANES PLC
    Inventors: Wilhelm Mack, Willy Grubel, Tatjana Kapp, Andreas Wulff, Wilfried Hess
  • Dispersant
    Patent number: 5688858
    Abstract: The invention relates to a polymer suitable as a dispersant, built up fromA) 0-80 mol % of one or more monomers having the formula ##STR1## in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4 may be the same or different and represent H or alkyl,B) 0-70 mol % of one or more monomers having the formula ##STR2## in which R.sub.5, R.sub.6 and R.sub.7 may be the same or different and represent H or alkyl and R.sub.8 is alkyl or substituted alkyl, and the alkyl group R.sub.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 18, 1997
    Assignee: Efka Chemicals B.V.
    Inventors: Peter Hermann Quednau, Walter Andreas Wulff