Bracket-type Connection Patents (Class 182/228.3)
  • Patent number: 8684139
    Abstract: A step tool has front and rear leg tubes, a bottom and top footplate, a connection device for connecting the footplate and the leg tubes, a lock catch device of the top footplate. The front leg tubes are joined to the rear leg tubes rotatablely. The foreside of the top footplate joins to the front leg tubes rotatablely. A rail is fixed on the rear leg tubes. The lock catch is disposed on the top footplate and is detachly connected to the rail. The lock catch device includes two connecting ears, a rotation axis, a lock catch and a torsion spring.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: April 1, 2014
    Assignee: New-Tec Integration (Xiamen) Co., Ltd.
    Inventor: Luhao Leng
  • Patent number: 8668049
    Abstract: A ladder comprises two stiles and at least a step unit mounted between the two stiles. The step unit includes a hollow step, an inner sleeve and an outer sleeve. The inner sleeve is fit into the hollow step, at an end of which a position restriction portion is located to prevent the inner sleeve from moving out, and the outer sleeve is adapted to surround the end of the hollow step. Besides, a fastener is set, the fastening end of which is passed through the stile, the outer sleeve and fastened in the inner sleeve. The present technique solution has a high supporting strength and a high shear resistance.
    Type: Grant
    Filed: December 29, 2008
    Date of Patent: March 11, 2014
    Assignee: New-Tec Integration (Xiamen) Co., Ltd.
    Inventor: Luhao Leng
  • Publication number: 20130248289
    Abstract: A brace rail shield combination for a rail of a ladder having at least one rung having a first portion that has a shape that conforms with an interior cross sectional surface of the rail. The brace rail shield combination includes a second portion that extends from the first portion at a first location to the rung to provide structural support to the rung. The second portion having an attachment portion at a second location spaced apart from the first location that is fixed to the rung. The first portion and the second portion being one continuous piece. A method for using an extension ladder, A method for producing a knee brace rail shield combination.
    Type: Application
    Filed: May 13, 2013
    Publication date: September 26, 2013
    Applicant: Werner Co.,
    Inventor: Kyle G. Astor
  • Patent number: 8381875
    Abstract: A lambdoidal ladder comprises front struts (100), back struts (200), treads (500), a folding device) 400, a connection device (600) and a platform (300). Wherein the platform (300) is connected to the front strut (100) and the back strut (200), and the structure between the front strut and the back strut is a rotatable connection; the platform (300) comprises a body (310) and a transverse rod (320) which goes through the front strut (100), an orientation slot (314) matching to the transverse rod (320) is set under the body (310); the folding device (400) fixed to the middle part of the front strut and the back strut is constructed a hinge with a H figuration; the tread (500) is fixed to the front and back struts by the connection device (600).
    Type: Grant
    Filed: October 27, 2008
    Date of Patent: February 26, 2013
    Assignee: New-Tec Integration (Xiamen) Co., Ltd.
    Inventor: Luhao Leng
  • Patent number: 8261880
    Abstract: A step ladder apparatus for retention within a stake pocket comprising a frame assembly a plurality of step assemblies and an attachment assembly. The attachment assembly includes a frame flange and a wedge member. The frame assembly is positioned within the stake pocket so that the frame flange overhangs one end of the stake pocket. The base of the wedge member is inserted into the stake pocket opposite the frame flange so that the wedge flange overhangs the stake pocket on a side opposite the frame flange. As a result, the flanges cooperate to substantially preclude downward movement of the frame assembly, and, in turn, removal of the frame assembly in a downward direction from the stake pocket.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: September 11, 2012
    Inventor: Daryl J. Hop
  • Patent number: 8225906
    Abstract: An extendable/retractable ladder assembly includes a first stile and a second stile and a plurality of rungs extending therebetween. Each stile may comprise a plurality of columns disposed in a nested arrangement for relative axial movement in a telescopic fashion. A connector assembly connects the rungs to respective columns in the first and second stiles. The ladder has improved manufacturability since connector assemblies may be assembled before connecting the rungs to respective columns. The standing surface of the rungs may be angled such that it is rotated towards horizontal when the ladder assembly is leaned against a wall. A latch assembly may be used to selectively lock relative axial movement between adjacent columns. The latch assembly includes a locking pin assembly comprised of a central post and an outer metal sleeve. An air damper may also be used to control airflow through the columns.
    Type: Grant
    Filed: August 22, 2008
    Date of Patent: July 24, 2012
    Assignee: Core Distribution, Inc.
    Inventors: Mitchell I. Kieffer, Allen A. Caldwell, Nathan L. Schlueter, Matthew J. Decker
  • Patent number: 8011475
    Abstract: An extension ladder, including multiple ladder sections, each including a pair of pin holes, a pair of columns, and a rung, including a pair of pins, a pair of springs, a gear, a pair of gear racks, and a pair of mounting rings, wherein the columns of adjacent ladder sections are fit with each other, diameters of the columns of the ladder sections increase from the top to the bottom, the pin holes are disposed on the columns, and operate to receive the pins, the pins are coaxial, the gear is disposed on a side wall of the rung and engaged with the gear rack, one end surface of the gear sticks out from the side wall of the rung, a key hole is disposed on the end surface of the gear, the mounting ring operates to fix the pin, and the spring is contacted with the pin.
    Type: Grant
    Filed: November 23, 2009
    Date of Patent: September 6, 2011
    Assignee: Tianjin Kelin Mold Technic Co., Ltd.
    Inventor: Kecheng Wang
  • Patent number: 7086499
    Abstract: A method for manufacturing a rail for a ladder. The method may include pultruding in a longitudinal direction, a rail having a selected cross-sectional shape. The rail may then be cut to a predetermined length at a distal end. A force may be applied, in a lateral direction, to the rail to form a curvature therein. The curvature may be characterized by a flared portion, a straight portion, and a curved region providing the transition therebetween. The rail may be held at the desired curvature for a time selected for the rail to take on the curvature substantially permanently. The force may then be removed and the rail may be assembled into a ladder.
    Type: Grant
    Filed: March 4, 2005
    Date of Patent: August 8, 2006
    Assignee: Wing Enterprises, Inc.
    Inventor: Newell Ryan Moss
  • Patent number: 6866117
    Abstract: A method for manufacturing a rail for a ladder. The method may include pultruding in a longitudinal direction, a rail having a selected cross-sectional shape. The rail may then be cut to a predetermined length at a distal end. A force may be applied, in a lateral direction, to the rail to form a curvature therein. The curvature may be characterized by a flared portion, a straight portion, and a curved region providing the transition therebetween. The rail may be held at the desired curvature for a time selected for the rail to take on the curvature substantially permanently. The force may then be removed and the rail may be assembled into a ladder.
    Type: Grant
    Filed: April 5, 2002
    Date of Patent: March 15, 2005
    Assignee: Wing Enterprises, Inc.
    Inventor: Newell Ryan Moss
  • Patent number: 6758016
    Abstract: A support for steps, having the shape of a triangular corner plate to be installed one after the other along a stringer. The sides of this support are reinforced, horizontally and vertically by a 90 degree fold, to fix the steps and risers. The ends are wider and possess a number of fixing holes to provide more stability when fixed against a stringer. The horizontal side is ended by a projecting horizontal rule. The wide part of the vertical side is flanked by vertical graduations. The horizontal rule is set against a stringer at a desired step run and the vertical graduations are set against the stringer at a desired step rise. The horizontal rule overlaps the vertical graduations of the preceding support.
    Type: Grant
    Filed: March 8, 2002
    Date of Patent: July 6, 2004
    Inventor: Eric Gobeil