Patents by Inventor Lawrence Mitchell

Lawrence 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).

  • Publication number: 20220176421
    Abstract: This present invention relates to a plumbing tool support accessory designed to support and stabilize a drain snake tool during a drain clearing process. The plumbing tool support accessory comprises at least two cutout grooves or notches along the rim of a bucket or other receptacle, such that the cutout grooves or notches are present diametrically opposite each other, thereby enabling the drain snake tool to be easily and securely placed in said grooves or notches. The plumbing tool support accessory of the present invention provides hands-free support to the drain snake tool and may also feature a cover having pockets to enable the user to keep smaller tools and equipment required for plumbing tasks stored therein.
    Type: Application
    Filed: December 2, 2021
    Publication date: June 9, 2022
    Inventors: Lawrence Mitchell, Michael Bell
  • Publication number: 20070229018
    Abstract: A permanent magnet brushless (PMBL) servo motor test apparatus and method allow testing of a motor in place. A set of static and dynamic tests is performed to determine proper motor operation of armature windings and rotor feedback devices. The test system of the present invention displaces the motor drive system. The test system comprises an armature driver, a feedback device input, and a system controller. The armature windings of the motor-under-test are driven in a polarity sequence according to a test sequence, whereby the rotor is driven in a series of rotations. Angle feedback is tested at a plurality of said rotations. Rotor velocity outputs are tested during said rotations. Armature current and voltage are determined at a plurality of said rotations and winding balance is tested. Said power switch is also operative to apply a voltage between the armature windings and the motor case to test for fault current flow.
    Type: Application
    Filed: March 29, 2006
    Publication date: October 4, 2007
    Inventors: Lawrence Mitchell, Stuart Mitchell
  • Patent number: 5443238
    Abstract: A picture hanging system using a flexible sheet material device in a generally T-shaped form having an opening adjacent the outer end of the center leg and the head includes spaced legs at opposite ends extending parallel to the leg and the leg is threadable through die cut slits in a backing member that is attachable to a picture frame or the like. The hanger device which is preferably cut out from mylar sheet material provides a strong and sturdy hanger which together with the threadable attachment to the slit sheet backing member will support and hold considerable framed picture weight and mounting with conventional wall fastener devices.
    Type: Grant
    Filed: February 9, 1994
    Date of Patent: August 22, 1995
    Inventor: Lawrence Mitchell