Patents by Inventor Francis LeBaron

Francis LeBaron 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).

  • Apparatus for securing adjustable support structures for manhole covers, grates and the like
    Patent number: 4690584
    Abstract: An adjustable leveling apparatus for manhole covers, grates and the like within ground and similar structures, employing an annular extension ring received within an annular base ring having an internal ring seat, the extension ring being provided with inwardly disposed rigid bar members deformable over the ring seat to securely lock the extension ring within the base ring.
    Type: Grant
    Filed: April 17, 1985
    Date of Patent: September 1, 1987
    Assignee: E. L. LeBaron Foundry Co.
    Inventor: Francis LeBaron
  • Method of and apparatus for adjustably leveling manhole covers, grates and the like
    Patent number: 4673310
    Abstract: An adjustable leveling structure for manhole covers, grates and the like within ground and similar structures which comprises an annular-walled ring for supporting a cover, grate and the like near its upper edge and mechanically compressible resilient layer means shaped to conform to the wall of the annular ring and disposed in the space between the outer wall of the annular ring and the ground or similar structure when the annular ring is vertically displaced.
    Type: Grant
    Filed: March 24, 1986
    Date of Patent: June 16, 1987
    Assignee: E.L. LeBaron Foundry Co.
    Inventor: Francis LeBaron
  • Structures for supporting manhole covers, grates and the like provided with self-storing adjustable leveling apparatus
    Patent number: 4337005
    Abstract: This disclosure is concerned with apparatus for enabling extension or other leveling adjustment of manhole cover supporting structures and the like comprising extension spacer rings resiliently compressed in self-storing fashion adjacent a support sleeve portion of the supporting structure, and adapted to be forced downward from storage to expand into position below the sleeve to extend or adjust the level of the same.
    Type: Grant
    Filed: February 17, 1981
    Date of Patent: June 29, 1982
    Inventor: Francis LeBaron