Patents Assigned to The Bloomfield Manufacturing Co., Inc.
  • Patent number: 4379546
    Abstract: A lifting jack for lifting loads and exerting a pulling force between two locations includes an I-beam standard having a series of uniformly shaped and evenly spaced apertures, an upper runner disposed about the standard and carrying a first climbing pin which is adapted to fit within a corresponding one of the various apertures, a lower runner disposed about the standard and carrying a second climbing pin also adapted to fit within a corresponding one of the various apertures. The upper and lower runners are connected together by a pitman and these three components are further assembled to a lever which is pivotally attached so as to provide a jacking action to the upper and lower runners. The lever has a pair of fulcrum points only one of which is used with any one jacking cycle, depending upon which runner is advancing and which climbing pin is to be inserted into a corresponding aperture.
    Type: Grant
    Filed: January 19, 1981
    Date of Patent: April 12, 1983
    Assignee: Bloomfield Manufacturing Co., Inc.
    Inventor: Thomas K. McIntosh
  • Patent number: D248460
    Type: Grant
    Filed: May 24, 1976
    Date of Patent: July 11, 1978
    Assignee: The Bloomfield Manufacturing Co., Inc.
    Inventors: Keith T. Dunn, Thomas K. McIntosh
  • Patent number: D446442
    Type: Grant
    Filed: July 9, 1999
    Date of Patent: August 14, 2001
    Assignee: The Bloomfield Manufacturing Co., Inc.
    Inventor: Patrick F. Simpson
  • Patent number: D602836
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: October 27, 2009
    Assignee: Bloomfield Manufacturing Co., Inc.
    Inventors: Patrick F. Simpson, E. Austin Harrah
  • Patent number: D626305
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: October 26, 2010
    Assignee: Bloomfield Manufacturing Co., Inc.
    Inventor: E. Austin Harrah
  • Patent number: D662681
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: June 26, 2012
    Assignee: The Bloomfield Manufacturing Co., Inc.
    Inventor: Patrick F. Simpson
  • Patent number: D706512
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: June 3, 2014
    Assignee: Bloomfield Manufacturing Co., Inc.
    Inventors: E. Austin Harrah, Patrick F. Simpson
  • Patent number: D816577
    Type: Grant
    Filed: January 9, 2017
    Date of Patent: May 1, 2018
    Assignee: The Bloomfield Manufacturing Co., Inc.
    Inventors: E. Austin Harrah, Patrick F. Simpson