Patents by Inventor John P. Pettersson

John P. Pettersson 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: 4314798
    Abstract: An arrangement for combined stationary form and slipform casting, including a slipform yoke capable of carrying two form halves, between which concrete is to be poured, for example for a wall or the like.According to the invention, the form halves each comprise a so-called supporting form half which can be expanded in the casting direction, i.e. usually upward in vertical direction, so that the area of the support wall of the supporting form half after expansion has substantially been increased, for example almost doubled. The resulting support surface of the supporting form half is intended to serve as a support in an additional form half.
    Type: Grant
    Filed: March 17, 1980
    Date of Patent: February 9, 1982
    Inventor: John P. Pettersson
  • Patent number: 4260344
    Abstract: An arrangement for guiding casting forms, which comprise a so-called working plane (1) in the form of, for example, a beam system, which is capable to support two casting form halves (3,4), between which concrete is intended to be poured. The casting forms further comprise a yoke (11) supported on legs (12), which yoke has the design of, for example, a frame with two preferably mutually parallel, substantially vertical sides (12) and one side (11) located intermediate and perpendicularly to said sides. The yoke (11) preferably is located above the working plane (1) and rigidly connected to the working plane (1).According to the invention at least two guide bridles (14,23) in the form of, for example, strip iron, and a friction device (17) are provided. The guide bridles (14) are intended to be rigidly anchored at one end (15) preferably in a ground level plane (16).
    Type: Grant
    Filed: February 1, 1980
    Date of Patent: April 7, 1981
    Inventor: John P. Pettersson
  • Patent number: 4260345
    Abstract: An arrangement for casting concrete walls, comprising a beam system (1,50), which is capable to carry two form halves (2,3,51,52), between which concrete is to be poured. According to the invention a guide pipe (13,56) is located between the form halves and can be moved and preferably be locked relative to and at the beam system (1,50). The guide pipe (13,56) has a length corresponding to at least 1.5 times the height of the form halves (2,3,51,52).
    Type: Grant
    Filed: August 21, 1979
    Date of Patent: April 7, 1981
    Inventor: John P. Pettersson