Patents by Inventor David W. Cronk

David W. Cronk 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: 7155802
    Abstract: A lift tool and method useful for installing a repaired clutch assembly or flywheel in a vehicle bell housing. The tool includes (a) a mounting bracket which can be secured to existing threaded openings in the bell housing, (b) an elongated lift arm pivotably attached to the mounting bracket, (c) a rail supported by the elongated arm, (d) a hook carried by the rail and being moveable along the rail, (e) a hanger bracket which is connected to the hook and which is able to support the clutch assembly or flywheel, and (f) power source for selectively raising or lowering the elongated arm. With proper safety precautions, the lift tool can also be used in the removal of a clutch assembly or flywheel from a bell housing.
    Type: Grant
    Filed: September 26, 2005
    Date of Patent: January 2, 2007
    Inventor: David W. Cronk
  • Patent number: 7020943
    Abstract: A lift tool and method useful for installing a repaired clutch assembly or flywheel in a vehicle bell housing. The tool includes (a) a mounting bracket which can be secured to existing threaded openings in the bell housing, (b) an elongated lift arm pivotably attached to the mounting bracket, (c) a rail supported by the elongated arm, (d) a hook carried by the rail and being moveable along the rail, (e) a hanger bracket which is connected to the hook and which is able to support the clutch assembly or flywheel, and (f) power source for selectively raising or lowering the elongated arm. With proper safety precautions, the lift tool can also be used in the removal of a clutch assembly or flywheel from a bell housing.
    Type: Grant
    Filed: October 27, 2003
    Date of Patent: April 4, 2006
    Inventor: David W. Cronk
  • Publication number: 20040084916
    Abstract: A lift tool and method useful for installing a repaired clutch assembly or flywheel in a vehicle bell housing. The tool includes (a) a mounting bracket which can be secured to existing threaded openings in the bell housing, (b) an elongated lift arm pivotably attached to the mounting bracket, (c) a rail supported by the elongated arm, (d) a hook carried by the rail and being moveable along the rail, (e) a hanger bracket which is connected to the hook and which is able to support the clutch assembly or flywheel, and (f) power source for selectively raising or lowering the elongated arm. With proper safety precautions, the lift tool can also be used in the removal of a clutch assembly or flywheel from a bell housing.
    Type: Application
    Filed: October 27, 2003
    Publication date: May 6, 2004
    Inventor: David W. Cronk
  • Patent number: 5828598
    Abstract: A magnetic memory cell with increased GMR ratio includes first and second layers of magnetic material stacked in parallel, overlying relationship and separated by a layer of non-magnetic material sandwiched between the first and second layers of magnetic material. Each of the first and second layers is switchable between a first and a second magnetic state and is formed to switch states with the application of a substantially equal magnetic field. A third layer of magnetic material is positioned adjacent one of the first and second layers of magnetic material so as to alter the amount of magnetic field required to switch the states of the one of the first and second layers of magnetic material. The third layer of magnetic material can be formed with a width larger than the cell width to increase the magnetic width of the cell and reduce the magnetic field required to switch states.
    Type: Grant
    Filed: May 23, 1997
    Date of Patent: October 27, 1998
    Assignee: Motorola, Inc.
    Inventors: Eugene Chen, Saied N. Tehrani, David W. Cronk