Patents by Inventor Heinz-Rudolf Roloff

Heinz-Rudolf Roloff 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: 5367745
    Abstract: A shower stall door hinge has two members connected by a pintle and having axially aligned sleeves. The sleeves of one member with one notch at one end which can be engaged by a radial pin in a radial bore of the pintle. In one of the other sleeves, a radial throughbore is provided to allow an anchoring pin to be inserted to lock that sleeve and its hinge member to the pintle when a fixed rest position for the door is to be defined by engagement of the pin in the notch. In the absence of the stop pin, a pair of washers flank the intermediate sleeve can be provided to allow free swinging of the hinge members.
    Type: Grant
    Filed: April 15, 1993
    Date of Patent: November 29, 1994
    Inventor: Heinz-Rudolf Roloff
  • Patent number: 4823438
    Abstract: A hinge assembly for shower stalls has a helical spring on the hinge pin, positioned in a gap between the coaxial hinge sleeves, the ends of this spring being attached respectively to the two pieces of the hinge so as to apply biasing spring tension to hold the door closed.
    Type: Grant
    Filed: February 3, 1988
    Date of Patent: April 25, 1989
    Inventor: Heinz-Rudolf Roloff
  • Patent number: 4035957
    Abstract: The invention concerns an entrance- or passage door, especially for shower stalls, with frame and door plate, whereby the frame designed from rustproof material for width adjustability on the upper- and bottom surfaces consists of telescoping profile portions adjustable telescopically and then lockable and at least one longitudinal side has holders for mounting a fixed door panel, and installation arrangements are provided on the upper and bottom surfaces of the frame for suitable pivots adjustable on a hinged door panel portion.
    Type: Grant
    Filed: April 15, 1976
    Date of Patent: July 19, 1977
    Inventor: Heinz-Rudolf Roloff