Patents by Inventor Lennert K. O. Wallman

Lennert K. O. Wallman 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: 5086639
    Abstract: In a method and an arrangement for pressing in a C-frame press, in which the press slide (5) is slightly inclined as a result of resilience in the frame (4) of the press at the pressing moment, wherein the effective slide movement is slightly shorter at the one side of the slide than at the opposite side, a plate-shaped spring member (28) is arranged under the press slide, which spring member is compressed by the force from the slide to a lesser extent at the firstmentioned side of the slide, as a result of which the inclination (.alpha.) of the slide is compensated and the useful slide movement is identical or approximately identical on both sides. The spring member is preferably secured with pre-compression between the press slide and an upper part (22) of the tool (2) which is used in the pressing.
    Type: Grant
    Filed: January 31, 1991
    Date of Patent: February 11, 1992
    Inventor: Lennert K. O. Wallman