Patents by Inventor Mihkel Orav

Mihkel Orav 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).

  • Soft tip game dart
    Patent number: 6267698
    Abstract: A soft tip game dart (30) comprising a plastic tip portion (32), a metallic body portion (34), and a flight or tail portion (36). The tip portion is received in a bore (42) in the portion and is biased forwardly in the bore by a spring and plunger (64, 66). Cross-sectionally, non-annular peripheries of the bore and head section (56) of the tip cooperate to limit relative rotational movement therebetween.
    Type: Grant
    Filed: February 4, 2000
    Date of Patent: July 31, 2001
    Inventor: Mihkel Orav
  • Game dart with retractable flight section
    Patent number: 5642887
    Abstract: A game dart (10) is provided with a flight section (24) extending axially rearwardly from the rearward end (32) of a body section (20) and having at least a portion thereof (38/40) axially movable relative to the body section to minimize or eliminate bounce-outs or deflections or subsequently thrown darts striking a previously thrown dart embedded in a target.
    Type: Grant
    Filed: June 4, 1996
    Date of Patent: July 1, 1997
    Inventor: Mihkel Orav
  • Anti-bounce-back dart
    Patent number: 5419567
    Abstract: An improved anti-bounce-back game dart (10) is provided wherein the structure mounting the point section (22A-22G) to the body section (20A-20G) for relative axial and/or axial and rotational movement is located internally of the dart body at the rearward end (32) of the body section, preferably in an enlarged cavity (36A-36G) opening directly to rearward end of the body section and easily accessible by threaded removal of the flight section (24A-24G).
    Type: Grant
    Filed: January 11, 1993
    Date of Patent: May 30, 1995
    Inventor: Mihkel Orav
  • Adjustable crimping tool
    Patent number: 4825682
    Abstract: An adjustable crimping tool (10) is provided having a pair of indexable discs (18, 32) each of which carry a plurality of concave die cavities (18A-18F, 32A-32F) spaced about and opening to outer periphery thereof which can be moved into registry (FIG. 1) to define a selected size/shape of crimping cavity (C).
    Type: Grant
    Filed: May 23, 1988
    Date of Patent: May 2, 1989
    Inventors: Mihkel Orav, Eugene D. Bonnes
  • Anti-bounce-back dart
    Patent number: 4596393
    Abstract: A game dart (10) of the anti-bounce-back type is provided for use with a dartboard (10A) having rib wires (13, 14). The game dart includes a body section (20), a point section (22) axially movable in the body section and a tail section (24) fixed to the body section and carrying flight members (26). The connection (48, 50) between the point and body sections is configured to cause simultaneous relative rotational and axial movement therebetween.
    Type: Grant
    Filed: October 21, 1985
    Date of Patent: June 24, 1986
    Inventor: Mihkel Orav
  • Air-atomizing fuel nozzle
    Patent number: 3980233
    Abstract: A fuel injection nozzle for gas turbines in which atomization of the liquid fuel is accomplished by high-velocity air entering the combustion chamber, characterized by minimizing the surface area of metal in contact with the fuel during the atomization process and further characterized by designing the air passages such that a swirling motion is imparted to the air followed by an acceleration of the air stream to eliminate variations in air velocity and to maximize air velocity at the point of impact with the fuel.
    Type: Grant
    Filed: November 24, 1975
    Date of Patent: September 14, 1976
    Assignee: Parker-Hannifin Corporation
    Inventors: Harold C. Simmons, Robert R. Conrad, Mihkel Orav