Rear Prop, Laterally Moving Patents (Class 182/170)
  • Patent number: 8590671
    Abstract: A device for stabilizing a ladder including a first stabilizing member having a predetermined fixed first length, a second stabilizing member having a predetermined fixed second length, a support structure for being mounted to the ladder at a predetermined location, the support structure being mounted to an upper portion of the first and the second stabilizing member, respectively, the support structure for holding the upper portion of the first and the second stabilizing member in proximity of a first frame rail and a second frame rail of the ladder, respectively, such that the first and the second stabilizing members are rotatable around a first axis oriented substantially parallel to rungs of the ladder, and a connecting member having a predetermined length removable mounted to the first and second stabilizing member at a predetermined distance to the upper portion of the first and second stabilizing member.
    Type: Grant
    Filed: August 16, 2010
    Date of Patent: November 26, 2013
    Inventor: Michael David Potter
  • Patent number: 8191685
    Abstract: A folding ladder with a pair of parallel front support members having a plurality of sequentially positioned grooves, a plurality of front aligned fastener holes aligned with a plurality of back fastener holes, a pair of non-parallel back support members, wherein the back support member inside forms a flush engagement with the front support member outer side; a plurality of pivot means disposed centrally through each back top end and extending from each back top end to an off center position in each front support top end, a plurality of pivoting non-removable rungs, a pair of locking spreader bars, a pair of pivotable cross braces and a plurality of recessed magnets for supporting the pivoting cross braces and for allowing portions of the folding ladder to compactly and securely engage each other.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: June 5, 2012
    Inventor: Grover J. Geiselman, III
  • Patent number: 6206139
    Abstract: A ladder comprises a top step, two leg assemblies mounted to the top step, and a step assembly mounted to the top step. The leg assembly and the step assembly pivot from a closed position in which the leg assemblies and the step assembly are extend vertically downward from the top step to an angular position in which the leg assemblies and the step assembly are angularly displaced from vertical and oriented along radial axes positioned 120 degrees from one another in a tripod configuration. Each leg assembly and the step assembly are locked to the selected angular position. The length of each leg assembly can be adjusted as desired. The step assembly includes a plurality of steps. Each of the leg assemblies and the step assembly have a foot for engaging the ground.
    Type: Grant
    Filed: October 17, 1996
    Date of Patent: March 27, 2001
    Inventor: Robert C. Bogart, Jr.
  • Patent number: 6116379
    Abstract: A ladder stabilizing system having a solid brace (50 or 46) or the combination of side spreaders (24C), the ladder sections (10 and 12), and a diagonal cross brace (18) creating two rigid triangles, the function of which is to prevent the ladder sections from twisting or flexing and therefore make the step ladder or the side braces (70 & 74) of a ladder or step ladder much more stable and will prevent the ladder sections (10 and 22), or extended side braces from twisting or flexing, thereby making the ladder stronger and safer.
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: September 12, 2000
    Assignee: Michael A. Huss
    Inventor: Michael A. Huss
  • Patent number: 4754845
    Abstract: A step ladder is shown, having a rigidified step section, a strengthened upper platform, two independently articulated angled rear legs, supported by a pair of rigid, pivoting supports. The angle of extension of the rear legs creates, in conjunction with the front step section of the step ladder, an essentially equilateral, triangular footprint of increased stability. The individual legs, in cooperation with a strengthened, rigid top plate structure, and the single member rigid support strut produces a decreased likelihood that the ladder will "walk" or move under the shifting weight of a user. The triangular footprint creates increased static stability, and also reduces the likelihood of toppling as a result of movement of a person standing on or near the upper step. The support leg actuation linkage is vertically fixed along a linkage support shaft. By fixing the linkage in three dimensions, torsional rigidity is maintained between the independent legs and walking motion is eliminated.
    Type: Grant
    Filed: October 29, 1987
    Date of Patent: July 5, 1988
    Inventor: William H. Baker
  • Patent number: 4632220
    Abstract: Ladder to the lower section of which are fitted two outriggers extending outwardly and forwardly for the purpose of enhancing the safety of the ladder in use. Each outrigger has a foot and is capable of being folded up against and parallel to the stile to which it is fitted for storage or transportation. The outriggers are lockable in any desired position by a cam and friction plate mechanism. Preferably each stile is provided with an adjustable extension leg controlled by a ratchet and panel arrangement to facilitate use of the ladder on uneven ground.
    Type: Grant
    Filed: October 15, 1985
    Date of Patent: December 30, 1986
    Inventor: John E. Murrell
  • Patent number: 4569419
    Abstract: The present invention relates to a foldable stepladder constituted by:a first pair of two main uprights,a plurality of steps,a device for maintaining said steps in their unfolded configuration,a second pair of two auxiliary uprights,wherein the auxiliary uprights are articulated at one of their ends on the upper part of the main uprights and they are articulated on each other about a pin in their median part to present, in unfolded position of use, the form of a cross, said auxiliary uprights being connected from said mutual pivot point to the central upright by a connecting rod. The invention is more particularly applicable to the manufacture of foldable stepladders.
    Type: Grant
    Filed: April 24, 1985
    Date of Patent: February 11, 1986
    Assignee: Denyse Stoltz
    Inventor: Gerard Stoltz
  • Patent number: 4524849
    Abstract: This invention relates to improvements in TRIPODS and more particularly to tripod connections.The invention includes a link portion which links tripod leg portions either formed as legs for ground contact or as portions for engaging with legs for ground contact so as to enable the legs to be arranged into a tripod like configuration, converging toward one another and interconnected together adjacent an upper portion thereof.The tripod can be in the form of shear legs, scaffolding supports, ladders and the like.
    Type: Grant
    Filed: June 11, 1984
    Date of Patent: June 25, 1985
    Assignee: Terrence Arthur Riddle
    Inventor: Ronald G. Riddle
  • Patent number: 4249637
    Abstract: A tripod stepladder includes rigid stiles having steps and a platform secured thereto. A hinge plate is pivoted to the platform and to a pair of legs to permit the legs to pivot as a unit towards and away from the stiles. The legs pivot relative to the hinge plate towards and away from each other to an unfolded tripod configuration. An A-shaped linkage limits pivoting movement and stabilizes the legs in the extended position.
    Type: Grant
    Filed: September 28, 1979
    Date of Patent: February 10, 1981
    Inventor: David A. Glasgow