Patents by Inventor Walter Bialobrzeski

Walter Bialobrzeski 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 forming thermoplastic perforated sheet
    Patent number: 4555378
    Abstract: Apparatus and method for forming curved needlepoint canvases from initially flat perforated sheet by applying pressure to a first side of the sheet, thus driving and deforming it into an aperture in a die, and by supporting the opposite side of the sheet during deformation with a pressure pad which includes a recess into which the deformed sheet is driven.
    Type: Grant
    Filed: April 13, 1984
    Date of Patent: November 26, 1985
    Assignee: Dick Martin Design Ltd.
    Inventors: Richard A. Martin, Walter Bialobrzeski
  • Child-proof latch
    Patent number: 4416477
    Abstract: A child-proof latch for preventing access by young children to drawers, cabinets and the like.
    Type: Grant
    Filed: November 2, 1981
    Date of Patent: November 22, 1983
    Inventors: Walter Bialobrzeski, Paul A. Sperry
  • Spring
    Patent number: 4235427
    Abstract: A plastic spring element defined by inner and outer convolutions of different thickness defined by radii and with tapered walls extending therebetween.
    Type: Grant
    Filed: May 7, 1979
    Date of Patent: November 25, 1980
    Inventor: Walter Bialobrzeski
  • Container safety closure
    Patent number: 4153172
    Abstract: A container safety closure including a spring element in the form of a generally convoluted tubular plastic element preset to a stable condition, where its further compression response is determined by special tapering of the wall thickness and radii of the convolutions. The spring element biases a container closure member against a detent arrangement and the spring must be compressed to permit the closure member to be removed from the container.
    Type: Grant
    Filed: May 2, 1978
    Date of Patent: May 8, 1979
    Inventor: Walter Bialobrzeski