Patents by Inventor Murray Hartman

Murray Hartman 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).

  • Snap-fitting transformer terminal cover
    Patent number: 4640985
    Abstract: A snap-fitting cover assembly for the terminal block (12) of an electrical transformer (10) comprises a backing plate (18) having apertures (20) for receiving terminals (14) of the transformer and adapted to be mounted against the terminal block (12). The width of the backing plate 18) is slightly greater than the width of the terminal block (12) so that opposite side portions (A) of the plate (18) extend beyond the block. A cover (28) adapted to fit over the backing plate (18) and block (12) has a pair of inwardly extending ears (26) that snap fit around the extending portions of the backing plate (18). With the backing plate (18) secured to the transformer terminals (14) by nuts (24), the cover (28) is retained to the terminal block (12) by a seal wire (34) extending through the cover (28) and behind the plate (18).
    Type: Grant
    Filed: April 26, 1985
    Date of Patent: February 3, 1987
    Assignee: Schlumberger Canada Limited
    Inventors: Frank J. Martin, Murray Hartman, Randy Saunders
  • Name plate
    Patent number: D299254
    Type: Grant
    Filed: April 26, 1985
    Date of Patent: January 3, 1989
    Assignee: Schlumberger Canada Limited
    Inventors: Frank J. Martin, Murray Hartman, Randy Saunders