Patents by Inventor Frederik W. Aalbertsberg

Frederik W. Aalbertsberg 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).

  • Method of manufacturing a longitudinally watertight cable and longitudinally watertight cable thus obtained
    Patent number: 4451692
    Abstract: A method of manufacturing a longitudinally watertight cable in which a sealing mixture of a vulcanizable silicone rubber, a diluent and a filler is provided in the cable core and between the cable core and the sheath, which mixture, after curing, forms a watertight stopper. According to the invention, a bivalent or trivalent metal salt of a higher fatty acid or a mixture of higher fatty acids is used as a filler. A sealing mixture is preferably used in the method which comprises 15-25% by weight of a multicomponent silicone rubber, 35-45% by weight of silicone oil and 35-45% by weight of calcium stearate. The sealing mixture can be provided, in a blockwise manner, by means of an injection technique.
    Type: Grant
    Filed: August 2, 1982
    Date of Patent: May 29, 1984
    Assignee: U.S. Philips Corporation
    Inventors: Adrianus M. M. Classens, Frederik W. Aalbertsberg, Hendrika G. Van Marle