Supporting Surface Compensating Means Patents (Class 182/200)
  • Patent number: 10738534
    Abstract: It is disclosed a nivellation device making it possible to place ladders horizontally on sloping ground. Such a device comprises a foundation (1) onto which there is secured/placed an elevated area (2), said elevated area (2) functioning as a fulcrum/see-sawing point for a plate (3) onto which plate (3) there may be placed or secured a ladder (I), and said plate 3 being equipped with securing devices (4) that may stay the position of the plate (3) in relation to the foundation (1). Additionally it is disclosed a tightening device for a wire that may be used for securing the nivellation device in a correct horizontal orientation and a device for ensuring that the ladder is not displaced in relation to a house wall.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: August 11, 2020
    Assignee: Inventu AS
    Inventor: Bendik Bø
  • Patent number: 9540876
    Abstract: A levelling stabilizer for a ladder and the like comprising a transverse brace (1) adapted for bridging the bottom stiles (2) of said ladder, two leg portions (3) pivotally fitted to said brace and an adjustment arm (7) acting between said brace and said leg portions to allow each said leg portion to be independently moved between a first fully retracted position aligned longitudinally with its respective stile and a second fully extended position at an angle normal to said stile.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: January 10, 2017
    Assignee: Branach Technology Pty Ltd
    Inventor: Michael Walsh
  • Patent number: 8979053
    Abstract: A standoff support for spacing a ladder and ladder jack from a roof. Two pairs of rods are pivotably mounted to a horizontally extending member mounted atop a ladder jack secured to a ladder. The rods are extended outwardly from the mounting member to stabilize and limit movement of the ladder jack and ladder relative to the roof.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: March 17, 2015
    Assignee: Foster, Deal & Sons Inc.
    Inventors: Thomas A. Deal, Robin L. Foster
  • Publication number: 20150068842
    Abstract: Ladders, ladder components, adjustment mechanisms and related methods are provided herein. In one embodiment, a ladder may include an adjustment mechanism for adjusting, for example, a leveler, a stabilizer, or any two relatively displaceable components of the ladder. The adjustment mechanism may include an actuating mechanism having a first structure and a second structure slidably disposed adjacent the first structure, the second structure having a plurality of engagement surfaces. A body is coupled with the first structure. At least two engagement pins are slidably displaceable relative to the body, wherein the plurality of engagement surfaces and the at least two engagement pins are arranged such that only a single engagement pin of the at least two engagement pins is in abutting engagement with an engagement surface of the plurality of engagement surfaces at one time. At least one biasing member is configured to bias the at least two engagement pins towards engagement with the engagement surfaces.
    Type: Application
    Filed: September 5, 2014
    Publication date: March 12, 2015
    Inventors: N. Ryan Moss, Gary Jonas, Brian Russell, Sean R. Peterson
  • Patent number: 8944214
    Abstract: An automatic locking system for a self-adjustable leveling ladder engages when the ladder is placed on the ground and disengages when the ladder is lifted off the ground. The automatic locking system includes a clamping mechanism, a first support, and a second support. The clamping mechanism includes a first member, a second member, a central pivot, a pair of key plates, and a cross rail. The first support pivotally connects to the first member, and the second support pivotally connects to the second member. The first member hingedly connects to the second member by the central pivot, which allows the key plates to grasp the cross rail if the first support and the second support are pressed against the ground. The first member and the second member are able to slide along the cross rail, which properly adjusts the first support and the second support for an uneven ground surface.
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: February 3, 2015
    Inventor: Gary Landon Worthington
  • Patent number: 8752671
    Abstract: A portable, collapsible, free-standing device for use by a rider to access the saddle stirrup when mounting a horse. The device has a center support pole with a handle on one end and a base on the other. Two folding steps are each pivotally mounted to spaced-apart brackets attached to the pole, to assist the rider to reach the stirrup. Several folding legs are mounted to a collar attached to the center pole in order to stabilize the device. The legs can be configured with extensions so that the device can be leveled on uneven terrain. Pivoting foot pads can be attached onto the ends of the legs. A rope is attached to the handle so that the device can be pulled up after the rider has mounted the horse, whereupon the device can be folded and collapsed for storage on the horse.
    Type: Grant
    Filed: April 11, 2013
    Date of Patent: June 17, 2014
    Inventor: Diane Henderson Holman
  • Patent number: 8393586
    Abstract: A ladder support device for securing a ladder to a vehicle is described having a hitch tube suitable for being received by a receiver hitch of a vehicle. A pair of side plates are attached to the hitch tube wherein each side plate of the side plates comprises a pivot void and an upper void wherein each pivot void is arranged to align with a first hollow ladder rung of a ladder and each upper void is arranged to align with a second hollow ladder rung of the ladder. A first rod is provided which is adapted for inserting in each pivot void and the first hollow ladder rung with the first hollow ladder rung between the side plates. A second rod is provided adapted for inserting in each upper void and the second hollow ladder rung.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: March 12, 2013
    Inventor: Conrad Mercure
  • Patent number: 8382056
    Abstract: A safety device, comprising: a mounting arrangement operable to receive and support a lower portion of a ladder; and a support assembly upon which the device may rest, the support assembly comprising a plurality of elongate support members, each of which has a pair of ground contacting locations on which the device may rest and is independently pivotable with respect to the mounting arrangement around a point located between the ground contacting locations.
    Type: Grant
    Filed: August 28, 2007
    Date of Patent: February 26, 2013
    Inventors: Steven Le Masurier, John Phillips
  • Patent number: 8360204
    Abstract: A self-adjusting ladder leveling device includes a first locking member attached to the ladder, and a second locking member movably associated with the first locking member. First and second legs extend outwardly from the second locking member toward a supporting surface. The second locking member slidably moves in relation to the first locking member as either the first or second leg is engaged with the surface. When both the first and second legs are engaged with the surface, the second locking member is moved into locked engagement with the first locking member, so as to maintain the ladder in a level state. When the first and/or second leg is removed from engagement with the supporting surface, the second locking member is released and is free to move with respect to the first locking member again.
    Type: Grant
    Filed: January 7, 2008
    Date of Patent: January 29, 2013
    Assignee: Landon Innovations, LLC
    Inventor: Landon Worthington
  • Publication number: 20120241256
    Abstract: A ladder is designed for a tank having a vertically extending side wall and a top of a convex curved profile, with an access point near the top center of the convex curved top, the ladder having a pair of parallel side rails, each side rail having a straight section at one end and a curved section at the other end, the curved section extending over the top of the tank and toward the access point, with plurality of rungs extending between and secured to the side rails, with at least one rung positioned in the straight section of the side rails and at least one rung positioned in the curved section of the side rails.
    Type: Application
    Filed: June 7, 2012
    Publication date: September 27, 2012
    Inventor: Steven Richard Ambriz
  • Patent number: 8162273
    Abstract: An adjustable support device (10) for a structure, including an arcuate support bar (26) terminating in feet (28) for engagement with a ground surface. Two spaced apart locking mechanisms (30) are pivotally connected to the structure. The arcuate support bar (26) extends between engagement rods (36a, 36b) of the locking mechanisms (30). The locking mechanisms (30) are pivotally moveable between a first position, in which a stop member (38) prevents further pivotal movement in one direction such that the engagement rods (36a, 36b) are positioned to allow the arcuate support bar (26) to slide freely over the engagement rods (36a, 36b), and a second position, when weight is applied to the locking mechanisms (30). In the second position, the engagement rods (36a, 36b) lock against the arcuate support bar (26) to prevent sliding movement there through for supporting the structure in a required orientation.
    Type: Grant
    Filed: June 3, 2008
    Date of Patent: April 24, 2012
    Inventor: Ronald Paul Jones
  • Publication number: 20110315478
    Abstract: A ladder, system, and methods are disclosed. The ladder is used on a steep-pitched roof and has a first section with rungs, a second section connected to the first section, a third section connected to the second section, and a paw pivotally connected to the third section. The third section has a length less than or equal to a length of the second section, and the third section also has a length less than a distance between a first rung of the rungs and an end of the first section. The ladder can be used in a system that utilizes the ladder and a roof anchor apparatus, where the roof-anchor apparatus has two portions and two shoes interconnected to the portions. A method includes positioning the ladder and then positioning the roof anchor apparatus, on and over a steep-pitched roof, respectively.
    Type: Application
    Filed: November 25, 2010
    Publication date: December 29, 2011
    Inventors: ODES LORENZO FOSTER, SR., ODES L. FOSTER, JR.
  • Patent number: 8042651
    Abstract: A portable leveling device capable of supporting any types of ladders, scaffolds, and other objects requiring leveled support regardless of object size when a plurality of the devices is used. The device may be deployed by one hand automatically and instantly quick over a terrain of virtually any profile. The device is capable of projecting an extension ladder position eliminating human error and reducing deployment time when the ladder is actually positioned. The device is capable of indicating deployment faults before use and allows visual inspection of the parts at fault without disassembling. The device is lightweight, can be easily carried with one hand, and stored compactly.
    Type: Grant
    Filed: March 4, 2010
    Date of Patent: October 25, 2011
    Inventors: Alisa Michnik, Yefim Michnik
  • Publication number: 20110186383
    Abstract: A ladder is designed for a tank having a vertically extending side wall and a top of a convex curved profile, with an access point near the top center of the convex curved top, the ladder having a pair of parallel side rails, each side rail having a straight section at one end and a curved section at the other end, the curved section extending over the top of the tank and toward the access point, with plurality of rungs extending between and secured to the side rails, with at least one rung positioned in the straight section of the side rails and at least one rung positioned in the curved section of the side rails.
    Type: Application
    Filed: February 3, 2010
    Publication date: August 4, 2011
    Inventor: Steven Richard Ambriz
  • Publication number: 20100133406
    Abstract: An adjustable support device (10) for a structure, including an arcuate support bar (26) terminating in feet (28) for engagement with a ground surface. Two spaced apart locking mechanisms (30) are pivotally connected to the structure. The arcuate support bar (26) extends between engagement rods (36a, 36b) of the locking mechanisms (30). The locking mechanisms (30) are pivotally moveable between a first position, in which a stop member (38) prevents further pivotal movement in one direction such that the engagement rods (36a, 36b) are positioned to allow the arcuate support bar (26) to slide freely over the engagement rods (36a, 36b), and a second position, when weight is applied to the locking mechanisms (30). In the second position, the engagement rods (36a, 36b) lock against the arcuate support bar (26) to prevent sliding movement there through for supporting the structure in a required orientation.
    Type: Application
    Filed: June 3, 2008
    Publication date: June 3, 2010
    Inventor: Roland Paul Jones
  • Patent number: 7686134
    Abstract: A ladder support and bracing apparatus includes a panel that has a top side, a bottom side, a first end, a second end, a first lateral side and a second lateral side. Each of a pair of lips is attached to and extends upwardly from the top side and each is coextensive with one of the first and second lateral sides. A vertical support is hingedly coupled to the bottom side and is positioned adjacent to the first end. The panel is substantially horizontally orientated when the vertical support is vertically orientated. The bottom side of the panel adjacent to the second is positioned on a step and the vertical support adjusted to horizontally orientate the panel. A ladder is then positioned on and supported by the panel.
    Type: Grant
    Filed: March 10, 2006
    Date of Patent: March 30, 2010
    Inventor: Jimmy L. Harris
  • Patent number: 7597294
    Abstract: A leveling system for household appliances comprises appliance feet which are arranged at the underside of the household appliance and which are adjustable in height at least partly by an actuation member and therefore make it possible to adjust the height of the household appliance and/or to adapt to unevenness in floors. According to the invention, the actuation member is a traction element and the appliance feet which are adjustable in height by the traction element have, in each instance, a cylindrical housing which is fastened to the underside of the household appliance and in which there is arranged a piston which carries the appliance foot plate, and the piston has a receptacle for the height-adjustable arrangement of the shaft of an appliance foot plate.
    Type: Grant
    Filed: May 31, 2003
    Date of Patent: October 6, 2009
    Assignee: A-Z Ausruestung und Zubehoer GmbH & Co. KG
    Inventor: Joachim Lotz
  • Publication number: 20080196973
    Abstract: A ladder levelling apparatus includes a ladder having a pair of side rails in spaced relation with a cross member extending the pair of side rails, a bracket affixed to the cross member, and a bar slidably received within the bracket so as to have ends of the bar respectively extending outwardly beyond the pair of side rails. A first foot and a second foot are respectively affixed to the ends of the bar. The bar is arch-shaped such that the ends are positioned below the bottom of the pair of side rails when the bar is centered relative to the side rails. A receptacle extends from the bracket suitable for receiving the bar therein.
    Type: Application
    Filed: February 20, 2007
    Publication date: August 21, 2008
    Applicant: Louisville Ladder Group LLC
    Inventor: Abraham Gomez Lopez
  • Publication number: 20080156588
    Abstract: A pivotally foldable ladder module apparatus, for use by hunters and wildlife enthusiasts, includes upper and lower body segments which are pivotally connected to one another. The apparatus includes a locking fastener for temporarily fixing the position of the lower body segment relative to the upper body segment. The apparatus may also include an adjustable strap attached to a central shaft of the upper body segment, to permit fastening of the apparatus to a tree. The apparatus is pivotally movable between an extended position and a folded position used for storage and transport. Each segment includes a central shaft, and a pair of tree-contacting bracket members for aligning the apparatus with a tree. When the apparatus is in the folded position, the tree-contacting bracket members are displaced from one another, and the respective central shafts are spaced apart from one another and are oriented substantially parallel to one another.
    Type: Application
    Filed: December 28, 2007
    Publication date: July 3, 2008
    Applicant: EASTMAN OUTDOORS INC.
    Inventor: Robert Butcher
  • Publication number: 20080078616
    Abstract: A self-leveling ladder system constituting both a straight or a step ladder system which includes hydraulic cylinders which are attached to the bottom of each of the ladder frames. The hydraulic cylinders are interconnected by hydraulic pressure lines and filled with a hydraulic fluid. The hydraulic pressure lines each include an off and on valve. In an on position of the valve, the hydraulic fluid freely flows through the pressure lines and the hydraulic cylinders. When the ladder, straight or step, is placed on an uneven ground and the foot pads on the bottom of the ladder have reached their proper position with respect to a vertical position of the ladder, the ladder will attain a stable position when the valve is placed into an off position.
    Type: Application
    Filed: October 3, 2006
    Publication date: April 3, 2008
    Inventor: Mark A. Ursitti
  • Patent number: 7255198
    Abstract: The present invention 10 discloses a stepladder having a ladder portion 18 that is comprised of rungs 24 and includes two ladder side rails, and a support portion that includes two angularly disposed telescoping legs 20 that provide mechanism for stabilizing the ladder. The telescoping support legs 20 are interconnected to each other and to the ladder side rails by lockable rigid spanner arms 22. When in use, the spanner arms 22 are locked in an open position to form a tripod formation between the rails while additionally limiting the angle of spread between the ladder portion 18 and the support legs 20. The present invention 10 also provides a retractable fly assembly 26 at the top of the ladder rails to provide for additional usable working height. A safety belt 36 is provided on the handle for additional support. A series of apertures with lock key fasteners 28 in each of the support legs provide mechanism for the user to securely position the legs at a desired length.
    Type: Grant
    Filed: October 25, 2004
    Date of Patent: August 14, 2007
    Inventor: Jennhwa Alan Lo
  • Patent number: 7222695
    Abstract: A ladder leveller for mounting onto at least one stile of a hollow runged ladder includes an elongate stile extension member, a cross bar sized for mounting journalled through a hollow rung of the ladder. A locking pin extends from the cross bar, through one of an array of apertures in the extension member and cooperates with a locking bar. The locking bar is releasably mounted onto the locking pin to lock the stile extension member onto the stile.
    Type: Grant
    Filed: July 28, 2005
    Date of Patent: May 29, 2007
    Inventors: Leona B. Jules, Richard K. Whittingham
  • Patent number: 7093690
    Abstract: The present invention provides a method and apparatus for stabilizing a ladder for minimizing accidents. For example, a main bracket may be connected to a lower arm, a foot bracket may be connected to the lower arm, an upper arm may be connected to the foot bracket and a slide arm may be telescopically slidable inserted inside the upper arm. Pins may be inserted into holes within the main bracket, upper arm, lower arm, and slide arm to secure the ladder stabilizer. The main bracket may be attached to most ladders regardless of side rail thickness. The ladder stabilizer may accommodate varying surfaces, flat and uneven, with the ability to fold up against the vertical sides of the ladder in a small compact unit when not in use.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: August 22, 2006
    Inventor: Jeffrey J. Swann
  • Patent number: 7036633
    Abstract: A quick release ladder leveler attachment system. So that a leveler may be mounted or released from the rails of a ladder quickly and without requiring the use of tools, a leveler attachment structure is added to the lower outer surface of the ladder rails. It may be integrated with the ladder rails or attached to ladder rails with bolts or rivets. The attachment structures include surfaces that engagingly mate with mounting structures on the leveler. The attachment and mating structures may be a keyhole slot and a knob. A spring catch may retain the leveler in place and a locking pin may be added to ensure safety.
    Type: Grant
    Filed: October 29, 2003
    Date of Patent: May 2, 2006
    Inventor: Philip F. Lanzafame
  • Patent number: 6997282
    Abstract: A ladder is adjustable in a plurality of planes so a wide variety of sloped surfaces can be accommodated. The ladder includes non-slip surfaces on the steps and a paint can holder that can accommodate a one gallon paint can.
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: February 14, 2006
    Inventors: Robert L. Sharp, Judith J. Sharp
  • Patent number: 6959785
    Abstract: A stabilizing ladder system is disclosed that comprises a ladder of scaffold assembly with a pair of rails and a plurality of rungs. The system further includes a ladder leveling assembly comprising a lower extension arm mounted on each of the rails of the ladder assembly, and each lower extension arms is slidably inserted and extendable from the lower end of one of the rails for engaging a ground surface. The system also includes a lower stabilizer assembly for stabilizing a lower portion of the ladder assembly with respect to the ground surface. The lower stabilizer assembly comprises a pair of outboard foot assemblies with a position of each of the outboard foot assemblies being laterally adjustable with respect to the rails of the ladder assembly such that a lateral spacing of the outboard foot assemblies is adjustable.
    Type: Grant
    Filed: October 24, 2003
    Date of Patent: November 1, 2005
    Inventor: Wade J. Chilton
  • Patent number: 6935463
    Abstract: A ladder safety support for use with an existing ladder is disclosed. The support includes an attachment assembly for removable connection to the lower end of the ladder and one of two interchangeable foot assemblies for supporting the ladder on a surface. The first foot assembly provides a surface-penetrating stake having a lower tapered section and presenting a pointed tip and a threaded portion for removably attaching the stake to the assembly. The second foot assembly is similarly removable and provides a surface-engaging pad.
    Type: Grant
    Filed: September 9, 2003
    Date of Patent: August 30, 2005
    Assignee: K & B Products, Inc.
    Inventor: William Kevin Brewster
  • Patent number: 6837339
    Abstract: A self-leveling support includes a first stile (1) and a second stile (2), a first leg member (6) and a second leg member (7), each having an elongate element adapted to move longitudinally relative to one of the stiles (1, 2), a spacer (3) adapted to secure the stiles (1, 2) substantially parallel to each other, and a cross member (8) adapted to pivot about a pivot pin (9) acting in a guide (10) in the spacer (3) substantially midway between the stiles (1, 2), the cross member being connected at each end to a respective portion of the leg members, angular movement of the cross member about or with the pivot pin causing one leg member to move outwards relative to its respective stile while the other leg member moves inwards relative to its respective stile.
    Type: Grant
    Filed: September 21, 2001
    Date of Patent: January 4, 2005
    Assignee: Wheelsure Technologies Limited
    Inventor: Sydney John Lees
  • Patent number: 6799660
    Abstract: A step ladder device for balancing and stabilizing a ladder upon most any surface. The step ladder device includes a ladder having pairs of side rails and rung members being attached to the pairs of side rails; and also includes a ladder support assembly having leg assemblies including leg support members being attached to bottom ends of the side rails, and also including leg members being adjustably attached to the leg support members, and further including feet members being pivotally attached to the leg members.
    Type: Grant
    Filed: December 26, 2002
    Date of Patent: October 5, 2004
    Inventor: James R. Crawford
  • Patent number: 6793041
    Abstract: A device for leveling a ladder on unlevel or uneven surfaces that includes a wedge shaped support member and features for safely retaining a ladder on a sloped top surface of the support member. Features include a rail, a slip resistant coating on the top surface, and a slip resistant tread on a bottom surface, the tread having a plurality of ribs. To prevent sliding on hard surfaces, the rubber grip tread preferably consists of a hard, substantially nonresilient rubber. To prevent sliding on soft surfaces, the device has a pair of retaining member bores and retaining members. Retaining member storage bores prevent the retaining members from being lost. A finger hold assists in removing the retaining members from a support surface. A ladder hanger bore assists in storing and transporting the device. Imprinted indicia prevent misuse of the device.
    Type: Grant
    Filed: February 7, 2003
    Date of Patent: September 21, 2004
    Inventor: Tony V. Taylor
  • Patent number: 6779632
    Abstract: An adjustable leveling stepladder is provided with telescopically adjustable support legs that allow it to be positioned on uneven surfaces. A pair of bubble levels that are used to indicate proper and safe horizontal positioning in two dimensions.
    Type: Grant
    Filed: April 26, 1999
    Date of Patent: August 24, 2004
    Inventor: Claude A. Parks, III
  • Patent number: 6729440
    Abstract: A ladder that would have a plurality of legs that would be independently adjustable from each other is disclosed. Each leg would have an incorporated adjustable leg that could be set at a varying height, with each adjustable leg having a non-skid pad on the bottom to minimize the risk that the ladder would slip when in use.
    Type: Grant
    Filed: September 18, 2002
    Date of Patent: May 4, 2004
    Inventor: Robert Bailey
  • Patent number: 6640931
    Abstract: A multi use L-shaped ladder utility bracket with ladder leveling attachments that is hand fastenable, due to four proprietarily aligned apertures in the bracket's elongated member, using two u-bolts and associated nuts, to any two rungs of any ladder with rungs that are sequentially distanced one from another by approximately 12 inches, center-point to center-point.
    Type: Grant
    Filed: February 5, 2001
    Date of Patent: November 4, 2003
    Inventors: R. Park Palmer, Cornelia G. Palmer, R. Park Palmer, Jr.
  • Publication number: 20030188927
    Abstract: A self-levelling support comprises a first stile (1) and a second stile (2), a first leg member (6) and a second leg member (7), each comprising an elongate element adapted to move longitudinally relative to one of the stiles (1, 2), a spacer means (3) adapted to secure the stiles (1, 2) substantially parallel to each other, and a cross member (8) adapted to pivot about a pivot pin (9) acting in a guide (10) in the spacer means (3) substantially midway between the stiles (1, 2), the cross member being connected at each end to a respective portion of the leg members, angular movement of the cross member about or with the pivot pin causing one leg member to move outwards relative to its respective stile whilst the other leg member moves inwards relative to its respective stile.
    Type: Application
    Filed: March 14, 2003
    Publication date: October 9, 2003
    Inventor: John Sydney Lees
  • Patent number: 6547036
    Abstract: A ladder leg support apparatus includes a support member having upstanding inner side and back walls and inclined outer side and back walls. Flanges selectively positioned along the inner side walls support a plate at a selected height for supporting a ladder leg thereon. An auxiliary side panel is pivotally coupled to an outer side wall and may be extended and supported with a support leg to provide stability when the support member is positioned on a stair. The apparatus further includes a platform having a support surface on which the support member may be positioned. The platform includes threaded leg assemblies which may be extended to a downwardly adjacent stair to support the platform on a selected stair. The platform includes at least one sight level for verifying the proper support leg length adjustment.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: April 15, 2003
    Inventor: Boyce N. Carter
  • Patent number: 6478113
    Abstract: A ladder leveling system for facilitating the safe use of a ladder on uneven surfaces and maintaining the rungs of the ladder in a substantially horizontal orientation. The ladder leveling system includes a ladder with a pair of side rails and a plurality of rungs extending between the side rails, a pair of legs with leg teeth, a plurality of clamping members for selectively urging the engagement of the leg teeth, a pair of foot members coupled to the legs, and a level coupled to a rung of the ladder for facilitating positioning of the ladder such that the rungs are substantially horizontal.
    Type: Grant
    Filed: July 7, 2000
    Date of Patent: November 12, 2002
    Inventor: Julian P. Ellison
  • Patent number: 6450292
    Abstract: A ladder levelling device which is simply operated by person's foot, embodying stile extender (7) either inserted into hollow stile (1) or removably attached to side of solid stiles of ladders or stepladders. Consisting of outer fixed housing, internal telescopic extender (7) and ratched mechanism, with teeth (20) in the extender (7) engaging with teeth (23) attached to an arm (21) which can rock about a pivot (4) in the housing to disengage the opposing teeth (20). A roller (15) or low friction device attached to the arm (21) between the teeth (23) and the pivot (4) disengages the teeth (23) during extending to reduce wear. A cam (12) attached either directly or indirectly to the opposing end of the arm (21) enables retraction and acts as safety device that prevents movement in either direction. A foot (30) is attached to base of expander by a spindle (31b) which allows limited universal movement and is capable of being locked in position.
    Type: Grant
    Filed: May 17, 2000
    Date of Patent: September 17, 2002
    Assignee: Sandpiper Construction Limited
    Inventor: Lance Rodney Sheffield
  • Patent number: 6435306
    Abstract: A pair of ladder leveler members attach to the base portion of the side rails of an extension ladder. Each leveler member has a sleeve that is mounted to the respective rail parallel to the rail, and a slide leg that is movable in the sleeve. The ladder swing feet may be mounted to the base of the legs. There are pin holes in the sleeves and in the slide legs that align with one another, and a retaining pin locks the slide leg into position. The ladder leveler allows the ladder to be set plumb, even when the ground is uneven. The sleeves and legs may be C-channel members of rectangular section.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: August 20, 2002
    Inventor: Kenneth J. Stoneburg
  • Patent number: 6382353
    Abstract: In the lower area of a ladder two pull or pressure rods are arranged on either side in a pivoting manner. Via sliding sleeves and joints said rods are joined to telescopic support elements which are each arranged at the level of an upright of the ladder. For greater stability the telescopic support elements are connected to each other via an auxiliary bar whose length can also be adjusted.
    Type: Grant
    Filed: February 14, 2001
    Date of Patent: May 7, 2002
    Inventor: Horst Laug
  • Patent number: 6374947
    Abstract: A ladder leveling device including an upper block portion couplable with respect to a bottom of a ladder leg. The upper block portion has a generally rectangular configuration defined by a closed upper end, an open lower end, a front wall, a back wall and opposed side walls. The front wall has a longitudinal slot formed therein. A lower block portion is coupled with respect to the upper block portion. The lower block portion has a generally rectangular configuration defined by an upper end, a lower end, a front wall, a back wall and opposed side walls. The upper end is slidably received within the open lower end of the upper block portion. The front wall has a bolt extending outwardly therefrom for being positioned within the longitudinal slot of the upper block portion whereupon a nut can be tightened on the bolt to fix a height of the upper block portion with respect to the lower block portion. A glass bubble level is provided that can be secured to the leg of the ladder above the upper block portion.
    Type: Grant
    Filed: April 27, 2001
    Date of Patent: April 23, 2002
    Inventor: Richard Nurkiewicz
  • Patent number: 6336521
    Abstract: Prior ladder levelling devices are difficult to adjust to a surface because it is necessary to unweight the ladder at the same time as adjusting. The present invention provides opposed locking brackets so that adjustment can be made by releasing a locking plate on just one bracket.
    Type: Grant
    Filed: September 13, 2000
    Date of Patent: January 8, 2002
    Inventor: Martin C. Dennis
  • Patent number: 6293367
    Abstract: An extension ladder with ladder leveling apparatus consisting of an extension ladder, an elongated stabilizing strut with a series of teeth extending laterally therefrom and attachable to one leg of the extension ladder unit by way of a pair of u-bolt components each with a pair of threaded ends with such threaded ends being insertable one each through each of two through holes in each of a pair of grip components with teeth extending medially from one side of each grip component to complement and insert within spacing between the teeth of the stabilizing strut upon the tightening of threaded nuts one each about each threaded end of each dual bolt component and further with the stabilizing strut terminating in a footing component that extends laterally from the lie of the plane of said strut and which footing component is flared outwardly both anteriorly and posteriorly and to which an anteroposteriorly pivotable foot unit equipped with a rubberize base pod is attached.
    Type: Grant
    Filed: April 17, 2000
    Date of Patent: September 25, 2001
    Inventor: Hilmar K. Gulseth
  • Patent number: 6189653
    Abstract: A multi-purpose scaffold includes rail parts disposed adjacent one another and displaceable relative to one another, displaceable and adjustable steps disposed therebetween, fold-out splayed supporting poles connected to the rail parts, a connecting rod connected to the supporting poles for securing the supporting poles, and a locking device for releasably locking the two rail parts. The support and connection bars can be adjustably telescopic and folded parallel to the multipurpose support beams or rail parts. The support bars can have footboards or caster rollers. The walking surface is made from a line of steps that provide a flat surface when folded. One side of the steps is rotatably connected to one rail part and the other side of the steps is rotatably connected to the other rail part. The scaffold can include a climb-through aperture and one or more railings as an anti-falling safety device. The scaffold can include an extension section for connecting one scaffold to another scaffold.
    Type: Grant
    Filed: October 8, 1999
    Date of Patent: February 20, 2001
    Inventor: Horst Laug
  • Patent number: 6164608
    Abstract: A ladder leveling chock system for maintaining a level surface for resting a ladder thereon. The ladder leveling chock system includes a block with top and bottom faces, an end face, and a pair of side faces. The top and bottom faces converge together at an end vertex extending between the side faces opposite the end face. The bottom face has a resiliently deformable surface provided thereon. The top face is designed for resting a lower end of a rail of a ladder thereon and has a resiliently deformable gripping strip coupled thereto for frictionally enhancing contact between the top face and the lower end of the rail.
    Type: Grant
    Filed: June 3, 1999
    Date of Patent: December 26, 2000
    Inventor: William A. Schiel, Jr.
  • Patent number: 6158552
    Abstract: This invention relates generally to an apparatus providing a secure step stool that can assist a user when climbing into an elevated vehicle. The apparatus is adjustable in height and includes foot pads allowing a stabilizing weight to be applied to the step stool.
    Type: Grant
    Filed: August 3, 1999
    Date of Patent: December 12, 2000
    Inventors: Margaret J. Gould, George W. Gould
  • Patent number: 6044929
    Abstract: A ladder leveling device that is free-standing and is not installed, or fixed to, the existing ladder (80). Simple, one-person operation of device provides quick convenient way to establish a level and stable work surface over non-level ground, allowing the safe mounting of most common ladders onto device frame (10). Trough (12) provides safe and secure positioning of ladder on top of leveled device. Range of device support, leg (25), adjustment is adequate to provide for safe use on common residential stairs. Infinite adjustment of supports allows precise leveling. Inclinometer (40) displays precise, accurate device-leveling information for safety and ease of operation. All-terrain footing devices (30) provide sturdy use on various ground types.
    Type: Grant
    Filed: January 27, 1999
    Date of Patent: April 4, 2000
    Inventor: David Matthew Wishner
  • Patent number: 6000496
    Abstract: A flexible step assembly for vehicles which includes a number of vertically disposed horizontal steel tread members attached at their ends to flexible side members. A spring loaded assembly is attached to the upper ends of each side member, the spring loaded assembly is of two part construction, top part being fixed to a location on the vehicle for use, the lower part being separable under impact from the top part, but upon release of loading is recoupled by the spring and its associated components.
    Type: Grant
    Filed: March 17, 1997
    Date of Patent: December 14, 1999
    Inventor: Randal D. Rinaldi
  • Patent number: 5967261
    Abstract: A portable stair-ladder platform comprising a adder support platform (1) and a support member (3,21,41,59,75,85) pivotally attached to the platform by a pivotal coupling (9,84,86), the parts being arranged such that, when assembled and in use with the ladder support platform substantially horizontal and the support member substantially vertical, an upwardly-facing surface area of the support member abuts a downwardly-facing surface area of the ladder support platform, the pivotal coupling and the surface areas being arranged to tend to maintain substantially a right angle between the abutting parts even when weight is applied to the ladder support platform, and the pivotal coupling being such as to prevent pivoting of the support member substantially beyond the vertical in that angular direction which is towards the underside of the ladder support platform but while allowing pivoting of the support member in the other direction so as to allow the device to be collapsed for transportation or storage.
    Type: Grant
    Filed: March 20, 1997
    Date of Patent: October 19, 1999
    Inventors: John M. Sandham, Stanley Trevor Lewis
  • Patent number: 5913382
    Abstract: A ladder extension system including a ladder having two sets of parallel vertically oriented supports each fixedly coupled at a top extent thereof. At least one of the sets of supports has a plurality of horizontal wrungs mounted therebetween for stepping purposes. Each of the vertically oriented supports has a bottom free end. A pair of mounting assemblies are removably mounted to the supports of the ladder. Next provided is a pair of extension bars slidably situated with respect to the mounting assemblies. A coupling mechanism is provided for releasably fixing the extension bars with respect to the mounting assemblies.
    Type: Grant
    Filed: December 31, 1997
    Date of Patent: June 22, 1999
    Inventor: Jeffrey L. Martin
  • Patent number: 5868222
    Abstract: Ladder stabilizers for lateral attachment to an extension ladder for inhibiting sideways slipping and falling thereof accordingly to full safety. A long tube support made from non-rusting, a non-articulated bracing member, and a ladder side rail form an A-frame with the tube support and the side rail comprising the legs of the A and the bracing member comprising the horizontal connecting member of the A. The lock for the telescoping sections visibly indicates they are locked, this as per American National Standard ANSI A14.2-1990, par. 6.7.10, the installation being fully secured because of the technically safe locking device the telescopic tube is blocked with a spring pin. Ladder stabilizers are telescopic tubes for uneven ground and are pivotable along only the same surface of the ladder, thus enlarging the sustentation polygon for ladder support.
    Type: Grant
    Filed: June 10, 1996
    Date of Patent: February 9, 1999
    Inventor: Francois Charbonneau