Patents by Inventor Karl-Heinz Bierfreund

Karl-Heinz Bierfreund 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: 8678960
    Abstract: The invention concerns an arrowhead with elongated tentacles, each of which forms two ends, each tentacle being fastened with one end to the arrowhead and the other end being unsupported, and in which each tentacle, starting from the fastening on the arrowhead, leaves it in the direction of the free end so that an angle of ?0° and less than 90° is formed between the longitudinal axis of the arrowhead in the flight direction and the tentacle.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: March 25, 2014
    Inventor: Karl-Heinz Bierfreund
  • Publication number: 20130244818
    Abstract: The invention concerns an arrowhead with elongated tentacles, each of which forms two ends, each tentacle being fastened with one end to the arrowhead and the other end being unsupported, and in which each tentacle, starting from the fastening on the arrowhead, leaves it in the direction of the free end so that an angle of ?0° and less than 90° is formed between the longitudinal axis of the arrowhead in the flight direction and the tentacle.
    Type: Application
    Filed: May 17, 2012
    Publication date: September 19, 2013
    Inventor: Karl-Heinz Bierfreund
  • Patent number: 8454070
    Abstract: A gripper for pulling arrows, wherein the gripper comprises a handle, a gripper head and three hinges. The handle and gripper head comprising two first legs extending in an elongated manner, which are connected to one another via the first hinge, which has a first rotation axis aligned transversely to the elongated extension of the legs, so that two counteracting levers are provided via a first hinge as a first support, wherein two lever arm sections act as force arm sections and arranged on the handle and two lever arm sections act as load arm sections and consequently are arranged on the gripper head, and wherein on each of the two lever arm sections that are arranged on the gripper head, a gripper jaw is pivoted in the interior of the gripper head via a second hinge.
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: June 4, 2013
    Assignee: Karl-Heinz Bierfreund
    Inventor: Karl-Heinz Bierfreund
  • Publication number: 20120292935
    Abstract: A gripper for pulling arrows, which are composed of an arrow head and an arrow shaft. The gripper comprises a handle, a gripper head and at least three hinges, wherein the handle and the gripper head comprise two first legs extending in an elongated manner, which are connected to one another via the first hinge, which has a first rotation axis aligned transversely to the elongated extension of the legs, so that two counteracting levers are provided by means of the first hinge as a first support. Two lever arm sections act as force arm sections, thus being assigned to the handle, and two lever arm sections act as load arm sections, thus being assigned to the gripper head. On each of the two lever arm sections that are assigned to the gripper head, a gripper jaw is pivoted in the interior of the gripper head.
    Type: Application
    Filed: April 26, 2012
    Publication date: November 22, 2012
    Inventor: Karl-Heinz Bierfreund
  • Patent number: 5275290
    Abstract: Disclosed is a dimensionally firm transport box, particularly container, which has firm and substantially plane side walls and a bottom wall and a cover. Each side wall is made from a two shell construction according to which spacer elements are arranged between the two shells of each side wall so as to mount the inner shell to the outer shell in spaced relationship. The spacer elements and/or the inner shell may have sufficient elasticity to withstand an increase of pressure of gas by which an air bag mounted to the inner shells may be inflated. The air bag is divided into communicating compartments which are associated to the side walls. A filling valve for the air bag is disclosed which has security features for preventing unauthorized use. Specific cooperating profiles are provided for removably mounting each compartment to its associated inner shell.
    Type: Grant
    Filed: March 9, 1992
    Date of Patent: January 4, 1994
    Assignee: Air Box Concept GmbH
    Inventor: Karl-Heinz Bierfreund