Patents by Inventor Claude R. Wallick, Jr.

Claude R. Wallick, Jr. 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).

  • Rung lock and latch assembly for an extension ladder
    Patent number: 5429207
    Abstract: A rung lock frame and a mechanical latching structural assembly for selectively releasably locking and releasably and augmentally latching a pair of adjacently positioned rungs of relatively slidable ladder sections of an extension ladder, the rung lock frame and latching structure including guide rib and inclined ramp arrangement to permit ready movement of said latching structure into and out of augmental latching position on the rung lock frame.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: July 4, 1995
    Assignee: Emerson Electric Co.
    Inventors: William H. Frank, Claude R. Wallick, Jr.
  • Rung lock assembly for an extension ladder
    Patent number: 5117943
    Abstract: A rung lock assembly for selectively and releasably locking a pair of adjacent rungs of relatively slidable fly ladder and base ladder sections of an extensible ladder including a rung lock frame pivotally mounted within the fly ladder section to be normally urged into engagement with adjacent rungs of the ladder sections and a pulley and cable system cooperative with the rung lock frame to release and move the same away from such engagement for relative slidable movement of the ladder sections.
    Type: Grant
    Filed: September 25, 1991
    Date of Patent: June 2, 1992
    Assignee: Emerson Electric Co.
    Inventors: Thomas J. Schmitt, Claude R. Wallick, Jr.
  • Method of manfacturing a foldable ladder structure
    Patent number: 5005280
    Abstract: A method of making foldable ladder structure wherein plastic material is injected and expanded in molds to form several parts of a foldable ladder which includes front and rear ladder sections that can be pivotally hinged at their upper portions, a collapsible shelf and spreader linkage to allow the sections to be relatively pivoted from collapsed face-to-face relation to erected position.
    Type: Grant
    Filed: November 15, 1989
    Date of Patent: April 9, 1991
    Assignee: Emerson Electric Co.
    Inventors: Claude R. Wallick, Jr., Thomas J. Schmitt
  • Method and apparatus for treating ladder rungs for forming assembly with ladder rails
    Patent number: 4959107
    Abstract: A method and apparatus for treating preselected areas of metallic ladder rungs wherein such metallic spaced rungs are moved in a path substantially normal to the longitudinal axes of the rungs with preselected areas of the spaced rungs passing through a controlled longitudinally extending heating zone to heat such preselected areas to a desired annealing temperature.
    Type: Grant
    Filed: April 3, 1989
    Date of Patent: September 25, 1990
    Assignee: Emerson Electric Co.
    Inventors: Claude R. Wallick, Jr., Thomas J. Schmitt, Bruce E. Bogart, John L. Krebs
  • Foldable ladder structure and method of manufacturing the same
    Patent number: 4834216
    Abstract: Foldable ladder structure and method of making the same wherein plastic material is injected and expanded in molds to form several parts of a foldable ladder which includes front and rear ladder sections that can be pivotally hinged at their upper portions, a collapsible shelf and spreader linkage to allow the sections to be relatively pivoted from collapsed face-to-face relation to erected position.
    Type: Grant
    Filed: January 15, 1987
    Date of Patent: May 30, 1989
    Assignee: Emerson Electric Co.
    Inventors: Claude R. Wallick, Jr., Thomas J. Schmitt
  • Ladder leg extender and leveler
    Patent number: 4766976
    Abstract: An improved ladder leg extender and leveler assembly including a frame structure which can be fixed in flush face-to-face relation to a ladder leg side so as to straddle rung fastener protrusions on the ladder leg side, thus avoiding bending stresses, the arrangement permitting quick and efficient assembly.
    Type: Grant
    Filed: August 28, 1987
    Date of Patent: August 30, 1988
    Assignee: Emerson Electric Co.
    Inventor: Claude R. Wallick, Jr.
  • Step ladder section
    Patent number: D297768
    Type: Grant
    Filed: March 11, 1985
    Date of Patent: September 20, 1988
    Assignee: Emerson Electric Co.
    Inventor: Claude R. Wallick, Jr.
  • Step ladder
    Patent number: D300365
    Type: Grant
    Filed: April 14, 1986
    Date of Patent: March 21, 1989
    Assignee: Emerson Electric Co.
    Inventors: Claude R. Wallick, Jr., Thomas J. Schmitt
  • Step ladder back section
    Patent number: D300366
    Type: Grant
    Filed: April 14, 1986
    Date of Patent: March 21, 1989
    Assignee: Emerson Electric Co.
    Inventors: Claude R. Wallick, Jr., Thomas J. Schmitt