Patents by Inventor Bruce Grachek

Bruce Grachek 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).

  • Locking mechanism for extendible telescoping tubular members
    Patent number: 4934658
    Abstract: A locking mechanism for extendible telescoping tubular members formed with radial, axially aligned openings. The locking mechanism comprises a hollow housing that surrounds the exterior wall of the outer tubular member. The housing is adapted for movement in the axial direction of the telescoping tubular members along the exterior wall of the outer tubular member. Disposed within the housing is at least one spring loaded lever that pivots about a fulcrum in the housing. Fixed to the opposite end portions of the lever, respectively, are oppositely directed plungers. When the radial openings of the telescoping tubular members are in register, the locking plunger enters the registered openings to restrain axial displacement between the telescoping tubular members.
    Type: Grant
    Filed: January 10, 1986
    Date of Patent: June 19, 1990
    Inventors: Marvin Berg, Bruce Grachek
  • Locking mechanism for extendible telescoping tubular members
    Patent number: 4577837
    Abstract: A locking mechanism for extendible telescoping tubular members formed with radial, axially aligned openings. The locking mechanism comprises a hollow housing that surrounds the exterior wall of the outer tubular member. The housing is adapted for movement in the axial direction of the telescoping tubular members along the exterior wall of the outer tubular member. Disposed within the housing is at least one spring loaded lever that pivots about a fulcrum in the housing. Fixed to the opposite end portions of the lever, respectively, are oppositely directed plungers. When the radial openings of the telescoping tubular members are in register, the locking plunger enters the registered openings to restrain axial displacement between the telescoping tubular members.
    Type: Grant
    Filed: July 30, 1984
    Date of Patent: March 25, 1986
    Inventors: Marvin Berg, Bruce Grachek