Patents by Inventor Karl R. Carlson

Karl R. Carlson 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: 6392130
    Abstract: An improved drum pedal having movable head pivots, a clutch on a beater connect, a compression spring with a bearing mount, a circular ramp (MemoryLock release) for cam adjustment of the drum rim clamp, and a cog belt/cog wheel linkage combination.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: May 21, 2002
    Inventor: Karl R. Carlson
  • Patent number: 4955277
    Abstract: An improved drum pedal for use with an acoustic or electronic bass drum has sprocket wheel 78 mounted for rotation on the toe end of a foot pedal 16. A rotational torque applied to a sprocket 72 attached to a crossarm 22 and in turn to a mallet head 28 causes mallet head 28 to swing through an arc 3 toward the drum head. Sprocket 72 and sprocket wheel 78 are connected by chain 76 in a compound pulley system wherein chain 76 is attached at one end to sprocket 72 and is wrapped around and under sprocket wheel 78 to be fixed at its other end at mounting bar 80, so that a downward motion of foot pedal 16 and sprocket wheel 78 through arc 2 moves sprocket 72 and mallet head 28 through arc 3, which motion is twice the magnitude in distance and velocity as that of sprocket wheel 78.
    Type: Grant
    Filed: September 28, 1989
    Date of Patent: September 11, 1990
    Inventor: Karl R. Carlson