Patents by Inventor Jan Lundh

Jan Lundh 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: 6065380
    Abstract: This invention concerns a saw blade (S) including at least one part with fine teeth (6) and at least one part with grouped teeth (7). The part of the blade with grouped teeth (7) includes a number of groups (4) of, for example, V-shaped indentations (10) in the blade (S), each pair of indentations defining a saw tooth (1). Each group (4) comprises an even number of indentations. In an arbitrary group (e.g. indentations one, three, five, etc.) a first imaginary line A), drawn between alternate tips (11) or base, is a straight line which forms a small angle (a) in relation to the longitudinal direction of the saw blade, the tips or bases being evenly distributed along the line. The invention also concerns a method and a device for producing a saw blade with grouped teeth by means of a tool comprising a punch and a punch die. The punch for cutting out the saw teeth is completely symmetrical and has substantially V-shaped tips. A saw blade blank is fed through the tool and cut in at least two stages.
    Type: Grant
    Filed: November 1, 1995
    Date of Patent: May 23, 2000
    Inventor: Jan Lundh