Patents by Inventor David R. Mitchell

David R. Mitchell 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).

  • Hand implement with shock absorber
    Patent number: 9969075
    Abstract: A lifting implement, such as a shovel has a handle and a load bearing member. The handle includes an articulated joint dividing the handle between a major portion and a lever portion. The lever is adapted to pivot within the range of an acute angle relative to the handle profile. The lever and the major portion of the handle each have a means for mounting a resilient member therebetween, where the resilient member is capable of absorbing shock and storing energy when urged by the pivoting of the lever within the range during the motion of lifting a load, and which stored energy is released when the load is being heaved by the implement. The handle may include a hand grip and a gripping portion on the major portion spaced from the articulated joint such that a triangle is formed with the hand grip, the gripping portion and the articulated joint at the apex of the triangle, wherein the apex of the triangle.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: May 15, 2018
    Assignee: 9301160 CANADA INC.
    Inventors: David R. Mitchell, Michael Moliner
  • HAND IMPLEMENT WITH SHOCK ABSORBER
    Publication number: 20170312905
    Abstract: A lifting implement, such as a shovel has a handle and a load bearing member. The handle includes an articulated joint dividing the handle between a major portion and a lever portion. The lever is adapted to pivot within the range of an acute angle relative to the handle profile. The lever and the major portion of the handle each have a means for mounting a resilient member therebetween, where the resilient member is capable of absorbing shock and storing energy when urged by the pivoting of the lever within the range during the motion of lifting a load, and which stored energy is released when the load is being heaved by the implement. The handle may include a hand grip and a gripping portion on the major portion spaced from the articulated joint such that a triangle is formed with the hand grip, the gripping portion and the articulated joint at the apex of the triangle, wherein the apex of the triangle.
    Type: Application
    Filed: September 21, 2015
    Publication date: November 2, 2017
    Inventors: David R. MITCHELL, Michael MOLINER
  • Brake or clutch lever or the like for a motorcycle
    Patent number: D327244
    Type: Grant
    Filed: June 15, 1990
    Date of Patent: June 23, 1992
    Inventor: David R. Mitchell
  • Brake or clutch lever or the like for a motorcycle
    Patent number: D328885
    Type: Grant
    Filed: June 6, 1990
    Date of Patent: August 25, 1992
    Inventor: David R. Mitchell
  • Brake or clutch lever or the like for a motorcycle
    Patent number: D328886
    Type: Grant
    Filed: June 8, 1990
    Date of Patent: August 25, 1992
    Inventor: David R. Mitchell