Folding Stile Patents (Class 182/163)
  • Patent number: 11377040
    Abstract: This disclosure relates to accessories configured to be supported by door strikers of motor vehicles. In particular, the accessories may be mounted to a motor vehicle when a traditional, or factory, door is removed. Some example accessories are useable as a step when mounted to the vehicle, and are also useable as a tool (i.e., as a shovel, flashlight, bit driver, socket wrench, and/or hex wrench) when removed from the vehicle.
    Type: Grant
    Filed: October 22, 2020
    Date of Patent: July 5, 2022
    Assignee: Ford Global Technologies, LLC
    Inventors: Stuart C. Salter, David Brian Glickman, Jeffrey Robert Seaman, Annette Lynn Huebner, Paul Kenneth Dellock
  • Patent number: 10760272
    Abstract: A disclosed rebar coupler includes a first coupling member, a second coupling member, and a coupling means. Accordingly, the connection angle between the first coupling member and the second coupling member is variable to a desired angle. The connection angle between rebars to be connected may be rapidly and conveniently varied at an industrial site to which the rebars are applied.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: September 1, 2020
    Inventor: Yang Oun Lee
  • Patent number: 10731414
    Abstract: An emergency descent system includes at least one ladder which is articulated on at least one supporting unit on a bearing device. The ladder is designed to be unfolded about this bearing device out of a rest position in which the ladder is disposed parallel to the at least one supporting unit and into a working position, wherein a push-out unit and a pivot unit operatively connected thereto by means of a catch are associated with the ladder. The pivot unit drives the push-out unit by the kinetic energy generated during the unfolding, wherein the push-out unit moves away from the at least one supporting unit at a first acute angle, and in the operating position, the push-out unit forms an acute angle with the at least one supporting unit and the pivot unit is held at an obtuse angle relative to the push-out unit on a stop associated with the at least one supporting unit.
    Type: Grant
    Filed: February 12, 2015
    Date of Patent: August 4, 2020
    Assignee: KOMATSU MINING GERMANY GMBH
    Inventors: Jens Junghans, Rüdiger Just
  • Patent number: 10435897
    Abstract: A fall protection tool for use in blocking an opening in a doorframe. The tool includes a frame assembly including a pair of lateral posts spaced from each other and extending substantially parallel with each other, and at least one transverse post extending between the pair of lateral posts. The tool also includes a hook member coupled to each lateral post, wherein the hook member is configured to couple to a portion of the doorframe such that the frame assembly is hangable from the doorframe.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: October 8, 2019
    Assignee: The Boeing Company
    Inventors: James Conners, Steven Paul Kury, Chase Alan Huston, Paul L. Rowe, John W. Theeringer
  • Patent number: 10260285
    Abstract: The present invention relates to an integrated folding safety handrail and outdoor escape stairs for high-rise buildings and an emergency escape device which are applied to high-rise buildings such as safety handrails for preventing falling from a movable passage exposed to apartment houses such as apartments or office buildings, and the outside and is applied as a substitute for safety handrails in high-rise buildings or outdoor ground clearance 3 m or more which is usually used as a safety handrail for falling prevention and so that an escaping person in the high-rise building escapes outside or safely escapes to a lower floor in case of emergency such as fire, terror, and disaster.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: April 16, 2019
    Assignees: FINE DNC CO., LTD.
    Inventor: Chong Chan Kim
  • Patent number: 10253565
    Abstract: The present invention relates to at least a foldable step mounted within a cabinet or cupboard of varying heights and having a minimal folded profile. The foldable step has a pair of cross members secured in a horizontal orientation to the cupboard. The cross members are coupled to a pair of cupboard support members. The cupboard support members are rotatably coupled to two offset members that rotate vertical support members to reach the floor. The vertical support members hold a plurality of steps using other support members. The entire linkage structure pivotally or slidably folds into a minimal profile.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: April 9, 2019
    Assignee: TNICO Technology Division Inc.
    Inventor: Don Cornthwaite
  • Patent number: 9915095
    Abstract: A clamping system for supporting an extension ladder on a gutter utilizes at least one and, more preferably, a pair of identical, clamp(s) to capture the ladder preventing movement laterally or horizontally away from the gutter. The clamp includes a clamp body with a latch pivotably mounted thereto which is spring biased to the gutter-clamping position. A lock screw may be utilized to prevent the latch from releasing the gutter preventing the ladder from moving. A pair of ears extends from each side of the clamp body and have slots which engage the channels on a forward face of the ladder leg.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: March 13, 2018
    Assignee: Ladder Mates USA
    Inventor: David L. Durfee, Jr.
  • Patent number: 9688204
    Abstract: A ladder in a multi-step structure includes: first front and rear connecting members that are connected to a vehicle body and between a wheel and an end of the vehicle body and that are juxtaposed with a predetermined space; a first step board that is connected between respective lower ends of the first front and rear connecting members; second front and rear connecting members, respective upper ends of which are connected to both ends of the first step board; and a second step board that is connected between respective lower ends of the second front and rear connecting members. In the first front and rear connecting members, one near the wheel is fixed to the vehicle body and the other near the end of the vehicle body is connected in a pivotally movable manner to the vehicle body and is foldable.
    Type: Grant
    Filed: March 23, 2015
    Date of Patent: June 27, 2017
    Assignee: KOMATSU LTD.
    Inventors: Katsuhiro Tsutsumi, Takehito Takahashi
  • Patent number: 9615603
    Abstract: The current invention provides an automatic gear-shift drive mechanism including a first gear system having a first gear ratio, and a second gear system having a second gear ratio, wherein the first gear ratio is higher than the second gear ratio, and is biased to spin the drying assembly with the first gear system when the automatic gear-shift drive mechanism is driven and the workload is below a threshold workload, and switch to spin the drying assembly with the first and the second gear systems when the automatic gear-shift drive mechanism is driven and the workload is at or above the threshold workload.
    Type: Grant
    Filed: April 17, 2012
    Date of Patent: April 11, 2017
    Assignee: Golden Choice Products Ltd.
    Inventors: Chung Ming Chan, Kwan Kit Chan
  • Patent number: 9556674
    Abstract: A roof ladder construction includes a roof hook assembly and a ladder to which the roof hook assembly is pivotally mountable for movement between two operative positions, a first of the operative positions being a position in which the roof hook assembly may extend over a roof ridge for engagement with a remote roof surface at a side of the roof opposite that at which the ladder is positioned and the other, second position being one in which the roof hook assembly does not engage with the remote surface of the roof.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: January 31, 2017
    Assignee: EASI-DEC ACCESS SYSTEMS LIMITED
    Inventor: Neil Ernest Baglin
  • Patent number: 9546510
    Abstract: Latching or locking deployment hinges are provided that include a latch mechanism, a spring-loaded tensioning device, and a trigger mechanism. The trigger mechanism and the spring-loaded tensioning device are configured to transfer the compressed spring load in the spring-loaded tensioning device to the latch mechanism once the hinge has closed sufficiently far enough to latch together, thus inducing a pre-load through the latch mechanism that eliminates gapping in the hinge interface. The hinges may be sprung or actuated using a powered drive mechanism.
    Type: Grant
    Filed: January 13, 2015
    Date of Patent: January 17, 2017
    Assignee: Space Systems/Loral, LLC
    Inventor: Varouj G. Baghdasarian
  • Patent number: 9523229
    Abstract: A hatch actuating arrangement for actuating a hatch of a hatch device, with the hatch device being adapted to be disposed or being disposed within a tower structure of a wind turbine. A hatch actuator being movably supported relative to the hatch such that a downward force upon the hatch actuator and a weight of the hatch actuator urges the hatch to rotate toward the open position; and wherein the hatch actuator is connected to and positioned proximate a side of a ladder above the hatch so that a user may open the hatch while upon the ladder above the hatch.
    Type: Grant
    Filed: November 24, 2014
    Date of Patent: December 20, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Joern Olesen
  • Patent number: 9027711
    Abstract: Self-locking bi-foldable load bearing segments are disclosed that can be used in applications such as ladders or ramp. First and second sections of the segment are foldably coupled to transition between an open configuration and a folded configuration. The first and second sections can include rungs pivotally attached to rails that can be further transitioned from the folded configuration to a collapsed configuration, but not transitioned from the open configuration to the collapsed configuration. Openings in the side walls of the rails allow the rungs to pivot in one direction, but not an opposite direction. In the open configuration, the openings of the first and second sections may be oriented opposite, and the direction of allowed rotation of the rungs of the first section and second section are opposite, restricting compression of the rails together.
    Type: Grant
    Filed: August 31, 2011
    Date of Patent: May 12, 2015
    Assignee: Ardisam, Inc.
    Inventors: Brendan Lonergan, Michael R. Furseth, Randy L. Schamberger
  • Publication number: 20150060204
    Abstract: A foldable ladder has multiple ladder segments that fold and unfold relative to each other. Each ladder segment includes one rung element and multiple side rail sections that unfold for deployment to form box-shaped side rails of the ladder. Adjacent ladder segments are connected to each other by hinge joints. The ladder includes locking features at the hinge joints for preventing relative pivoting movement of adjacent ladder segments by more than about 180 degrees.
    Type: Application
    Filed: August 28, 2014
    Publication date: March 5, 2015
    Inventors: Brian Walter, Brad Glass
  • Publication number: 20140027204
    Abstract: A climbing support is provided for aiding a climber in scaling a tree, pole, or other generally vertical surface. The climbing support includes an elongate body that supports a plurality of steps, a strap, cable, or other flexible securing member that is wrapped around the tree, and a retractor for stowing the flexible securing member so that it is extendable and retractable from the support. The climbing support is thus substantially self-contained so that it does not require separate components for installation or use. Standoffs may be provided for stabilizing the support in a location spaced from the tree. Optionally, the climbing support's steps, standoffs, and elongate body are collapsible to compact configurations for stowage or transport.
    Type: Application
    Filed: July 24, 2013
    Publication date: January 30, 2014
    Inventor: Cal G. Niemela
  • Publication number: 20130048429
    Abstract: Self-locking bi-foldable load bearing segments are disclosed that can be used in applications such as ladders or ramp. First and second sections of the segment are foldably coupled to transition between an open configuration and a folded configuration. The first and second sections can include rungs pivotally attached to rails that can be further transitioned from the folded configuration to a collapsed configuration, but not transitioned from the open configuration to the collapsed configuration. Openings in the side walls of the rails allow the rungs to pivot in one direction, but not an opposite direction. In the open configuration, the openings of the first and second sections may be oriented opposite, and the direction of allowed rotation of the rungs of the first section and second section are opposite, restricting compression of the rails together.
    Type: Application
    Filed: August 31, 2011
    Publication date: February 28, 2013
    Applicant: ARDISAM, INC.
    Inventors: Brendan Lonergan, Michael R. Furseth, Randy L. Schamberger
  • Patent number: 8381873
    Abstract: A convertible ladder and scaffold assembly includes a plurality of uprights and a plurality of beams each extending from one of the uprights. A plurality of hinges each hingedly connect one of the uprights to one of the beams about a rotational axis (AR) to provide an assembly having ladder, scaffold, push-cart, and storage configurations. Each of the hinges defines catches and present a stop releasably engaging catches for preventing rotation about the rotational axis (AR). At least one lever bar releasably engages a plurality of the stops for simultaneously releasing a plurality of the stops from engaging catches. Each of the lever bars have a plurality of lever sections for providing leverage to disengage the stops from the catches. Each of the lever bars has a grip section interconnecting the lever sections for simultaneously releasing a plurality of the stops from engaging the catches.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: February 26, 2013
    Assignee: Affinity Tool Works
    Inventors: Mark Cross, Eric Primeau
  • Publication number: 20130043092
    Abstract: A safety equipment deployment system includes a sensor for receiving input, circuitry for determining whether the input satisfies a time pattern requirement and, responsive to determining satisfaction of the time pattern requirement, triggering release of safety equipment. The safety equipment can include a foldable ladder fixed to a stanchion. The safety equipment can include a device attached to a cord that extends from a bobbin below deck, through a hollow stanchion, and out a top end of the stanchion.
    Type: Application
    Filed: August 16, 2012
    Publication date: February 21, 2013
    Inventor: Thomas W. Clardy
  • Patent number: 8376087
    Abstract: Ladder configurations and components are provided including an outer rail assembly which is longitudinally adjustable relative to an inner rail assembly. The outer rail assembly may include a pair of spaced apart outer rails each fixedly coupled to an associated sleeve or sliding mechanism. Each sleeve is in turn slidably coupled to an inner rail of the inner rail assembly. The outer rails may be positioned and oriented at an acute angle relative to the inner rails so as to provide an increased base distance between the two outer rails. Support structures are also disclosed which are coupled at multiple locations along a rail member and at least one location of a rung. Additionally, ladder hinges are disclosed including hinge components configured to effectively transmit loads from associated rails. In one embodiment the hinge may include a pinch prevention mechanism.
    Type: Grant
    Filed: December 5, 2011
    Date of Patent: February 19, 2013
    Assignee: Wing Enterprises, Inc.
    Inventors: Newell Ryan Moss, Jack W. Bowers, David Francis
  • Patent number: 7984790
    Abstract: The present disclosure relates to a step stool, and particularly to a folding step stool including legs that fold between an opened, use position and a collapsed, folded position. The present disclosure also relates to a tray assembly that moves relative to the legs and is used for storing or holding articles associated with use of the step stool. The step stool includes a mechanism to coordinate the movement of the tray assembly and a step of the step stool when the step stool is moved between the opened and collapsed positions.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: July 26, 2011
    Assignee: Cosco Management, Inc.
    Inventors: Thomas J. Meyers, Todd C. Midkiff
  • Patent number: 7766125
    Abstract: A collapsible work horse has legs pivotally mounted to opposing surfaces of a support beam. The legs are secured in the extended position by a two-part locking arrangement. In one non-limiting embodiment of the invention, a first part of a locking arrangement is mounted to each of the first ends of the legs adjacent the pivot point of its respective leg, and a second part of the locking arrangement is mounted to the supporting member. When the legs are in the extended position, the first and second parts of the locking arrangement engage one another to securely fix the legs in the extended position. In another non-limiting embodiment of the invention, a plurality of work horses are assembled with a tool support and work piece supports to provide a work station. The tool support and work piece supports are designed to be fixable in a compact storage arrangement.
    Type: Grant
    Filed: August 14, 2006
    Date of Patent: August 3, 2010
    Inventor: Gerald L. Fowler
  • Patent number: 7578371
    Abstract: A universal hinged tread system includes a folding stair set with one or more primary treads. At least one auxiliary tread is hingedly attached atop at least one primary tread. The folding stair set includes at least two hingedly attached sections. The hingedly attached sections fold flat against each other when in a stowed position, and every other folding stair section is inverted when in the stowed position. Each auxiliary tread is angularly displaced from its primary tread as its folding stair section is inverted. The auxiliary treads do not obstruct any primary treads on other sections when in a stowed position. The auxiliary treads include a beveled lower front edge to aid the auxiliary treads in deflecting.
    Type: Grant
    Filed: October 28, 2005
    Date of Patent: August 25, 2009
    Inventors: Philip Allred, III, Joel Bennett
  • Publication number: 20090050406
    Abstract: A boarding ladder includes an upper step having a first and second collar, a lower step having a left and right side selectively slidably engaged with the first and second collar, respectively, with the lower step selectively slidable between raised and lowered positions. Left and right extensions are pivotally engaged with the left and right sides, respectively, with the left and right extensions pivoting between folded and extended positions. The left and right extensions are selectively slidably engaged with the first and second collars, respectively, in the extended position. A method of lowering a boarding ladder includes pivoting a left and right extension of a lower step to an extended position, disengaging a retention member from an upper step and the lower step, and lowering the lower step from the upper step until a stop on each of the left and right extensions abuts the upper step.
    Type: Application
    Filed: August 22, 2007
    Publication date: February 26, 2009
    Inventor: Rick Huddleston
  • Publication number: 20080257645
    Abstract: Ladder configurations and components are provided including an outer rail assembly which is longitudinally adjustable relative to an inner rail assembly. The outer rail assembly may include a pair of spaced apart outer rails each fixedly coupled to an associated sleeve or sliding mechanism. Each sleeve is in turn slidably coupled to an inner rail of the inner rail assembly. The outer rails may be positioned and oriented at an acute angle relative to the inner rails so as to provide an increased base distance between the two outer rails. Support structures are also disclosed which are coupled at multiple locations along a rail member and at least one location of a rung. Additionally, ladder hinges are disclosed including hinge components configured to effectively transmit loads from associated rails. In one embodiment the hinge may include a pinch prevention mechanism.
    Type: Application
    Filed: April 29, 2008
    Publication date: October 23, 2008
    Applicant: WING ENTERPRISES, INC.
    Inventors: Newell R. Moss, Jack W. Bowers, David Francis
  • Patent number: 7424933
    Abstract: A folding ladder includes a hinge assembly having first and second ladder hinge plates each defining a plate opening and a plurality of locking slots. A housing is associated with the first ladder hinge plate and extends through the plate openings to provide a rotation axis for the plates, and the second plate is operable to rotate relative to the first plate about the rotation axis to selectively align slots of the first and second plates. A key outside the housing selectively engages aligned slots to selectively prevent rotation of the ladder hinge plates about the rotation axis and is operated by a manual rotation member. An extension ladder includes a pair of nested outer and inner ladder rails. Ladder rungs connected between and the inner rails define a plurality of supporting openings and the inner rails include outer bearing surfaces associated with the supporting openings.
    Type: Grant
    Filed: May 28, 2003
    Date of Patent: September 16, 2008
    Assignee: Norman Miller
    Inventor: Yoram Weiss
  • Patent number: 7364017
    Abstract: Ladder configurations and components are provided including an outer rail assembly which is longitudinally adjustable relative to an inner rail assembly. The outer rail assembly may include a pair of spaced apart outer rails each fixedly coupled to an associated sleeve or sliding mechanism. Each sleeve is in turn slidably coupled to an inner rail of the inner rail assembly. The outer rails may be positioned and oriented at an acute angle relative to the inner rails so as to provide an increased base distance between the two outer rails. Support structures are also disclosed which are coupled at multiple locations along a rail member and at least one location of a rung. Additionally, ladder hinges are disclosed including hinge components configured to effectively transmit loads from associated rails. In one embodiment the hinge may include a pinch prevention mechanism.
    Type: Grant
    Filed: November 11, 2003
    Date of Patent: April 29, 2008
    Assignee: Wing Enterprises, Inc.
    Inventors: Newell R. Moss, Jack W. Bowers, David Francis
  • Publication number: 20080078615
    Abstract: A walking ladder which has a pair of ladder sections each section having a pair of spaced apart elongated members and a series of steps spaced apart and extending across the space between the elongated members. A pair of hinges are provided with each hinge pivotally coupling corresponding ends of the elongated members so that said sections have an A-shape when in an operating position. The hinges are confined to a width bounded by sides of the elongated members. A user straddles the walking ladder and removes his/her weight from one step and transfers it to another enabling the user to move one section of the ladder relative to the other and hence walk.
    Type: Application
    Filed: October 2, 2006
    Publication date: April 3, 2008
    Inventor: Sidney B. Fowlds
  • Publication number: 20080073150
    Abstract: The invention provides aluminum ladder hinge with enhanced safety structure. The hinge is made of flat inner case and outer case. Especially, the hinge has a locking block design to stabilize the angle of opening and closure. There is also a design of a joint reinforcing disk and a reinforcing tab to enhance the guiding groove and reduce friction loss. There is also design of prolonged caps and a rectangular hole, liner to strengthen the assembly of the hinge and the aluminum ladder. Based on the above designs, an advanced aluminum ladder hinge with enhanced safety structure is invented to improve the safety of aluminum ladder in use.
    Type: Application
    Filed: September 27, 2006
    Publication date: March 27, 2008
    Inventor: Fan Nan LIN
  • Patent number: 7341392
    Abstract: An articulated joint for a foldable ladder includes an outer casing pair, an inner casing pair pivotally moving with respect to the outer casing pair, a lock device composed of a lock block and a locating pin. The locating pin has a ball end to be slightly squeezed in the locating hole such that the ball end is capable of retained in the locating hole and pivotally joined to the locating hole. The lock block provides triangular prism shaped projections at two opposite long edges of the bottom side of the lock block. Hence, the lock block can move along the guide slot of the outer casing shells steadily and be pivotally joined to fixing pin without loosening apart from each other.
    Type: Grant
    Filed: April 16, 2007
    Date of Patent: March 11, 2008
    Assignee: Dofair Co., Ltd.
    Inventor: Chin-Wen Yeh
  • Patent number: 7311177
    Abstract: A folding step stool includes a hinge mechanism. The step stool includes a first section connected to the hinge mechanism. The first section having a bottom step. The step stool includes a second section connected to the hinge mechanism. The step stool includes a third section connected to the hinge mechanism, wherein when the folding step is in and unfolded state, the first and second sections form a base on a floor and are in angular relationship with each other, and the third section extends upward from the hinge mechanism relative to the first section, and when the first, second and third sections are in a folded state, they are essentially in parallel with each other, are no more than ¾ as tall and ½ as long as when the step stool is in the unfolded state. A method for using a folding step stool. A hinge for a folding step stool having a folded and unfolded state and having a top rail, front rail and rear rail. A method for using a folding step stool.
    Type: Grant
    Filed: November 1, 2005
    Date of Patent: December 25, 2007
    Assignee: Werner Co.
    Inventors: Thomas W. Parker, John J. Fiumefreddo
  • Patent number: 7306075
    Abstract: A dynamic hinge includes a first member connected to a first ladder portion of a ladder, and a second member connected to a second ladder portion. The first member pivots relative to the second member about a pivot axis that does not intersect both the first and second members. The first member includes first and second parallel segments, and the second member includes a third and fourth parallel segments. A guide plate is attached to either the first or second member, and the guide plate is positioned between the first and second segments and between the third and fourth segments. The guide plate includes two non-linear slots, and an other of the first and second members includes two pins, respectively adapted to slide within the two non-linear slots. The pins extend between either the first and second segments or the third and fourth segments.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: December 11, 2007
    Assignee: Werner Co.
    Inventors: David A. Winslow, Joseph C. Dangrow
  • Patent number: 7264082
    Abstract: A ladder having a first ladder section, a second ladder section, an adjustable hinge mechanism, an engagement indicator and a static hinge mechanism. The adjustable hinge mechanism is mounted with respect to the first ladder and the second ladder so that the adjustable hinge mechanism is moveable between an engaged position and a disengaged position. The static hinge mechanism enables the first and second ladder sections to be maintained in a stationary position with respect to each other.
    Type: Grant
    Filed: October 29, 2004
    Date of Patent: September 4, 2007
    Assignee: Tricam Industries, Inc.
    Inventors: Dennis Simpson, Ryan McMunn
  • Patent number: 7234203
    Abstract: A hinge for a folding ladder including a hinge latch movable between a locked position and an unlocked position disposed within a hinge latch cavity. The hinge latch includes a first locking portion protruding therefrom, an elongated slot formed configured to slidingly receive a hinge shaft, a first opening configured to receive a first biasing member, and a second opening configured to receive a locking member. Rotational movement of one hinge casing relative to another hinge casing is prevented by engagement of the first locking portion and locking member with a respective one of the first opening and second opening.
    Type: Grant
    Filed: August 7, 2003
    Date of Patent: June 26, 2007
    Assignee: Werner Co.
    Inventors: Brett A. Latimer, Ronald K. Burig, Christine A. Brown, David E. Plotner, John J. Fiumefreddo, Roy B. Bendickson, Joseph C. Dangrow
  • Patent number: 7225896
    Abstract: A collapsible handrail mechanism for steps or a ladder including: an outer stringer and an inner stringer jointly pivotable about a pivot point; a stanchion located between the outer and inner stringers and pivotally mounted to at least one of the stringers; a latching mechanism through which the stanchion passes and to which at least one of the stringers is pivotally mounted at the said pivot point; the latching mechanism having a slide plate preventing substantial downwards movement of the stanchion, a top plate preventing substantial upwards movement of the stanchion, and a side plate preventing substantial sideways movement of the stanchion; whereas, in operation of the handrail mechanism from a stowed position, when the stringers are lowered the stanchion is thereby forced to slide on the slide plate causing the stanchion to pivot about its mounting up into an operational position.
    Type: Grant
    Filed: September 5, 2003
    Date of Patent: June 5, 2007
    Inventor: Kerry Charles Broad
  • Patent number: 7140072
    Abstract: A lockable hinge includes a first and second hinge member, a lock, and an actuator. The lockable hinge is coupled to a pair of ladder-leg sections and is arranged to allow the ladder-leg sections to move among closed-ladder, trestle-ladder, and straight-ladder positions. The lock is used to lock the hinge members to cause the ladder-leg sections to lock in the closed-ladder, trestle-ladder and straight-ladder positions.
    Type: Grant
    Filed: November 10, 2004
    Date of Patent: November 28, 2006
    Assignee: Cosco Management, Inc.
    Inventor: Lu Hao Leng
  • Patent number: 7121381
    Abstract: A system and method for providing an improved ladder for enabling a user to climb up or down and forward or backwards movement relative to a surface. The system enables increased mobility and stability. The system can be designed in multiple ways which some of them have been shown in the present invention. The present invention clearly saves production time, keeping the user on the ladder while relocating, and it definitely more convenient and time saving to the user.
    Type: Grant
    Filed: July 15, 2004
    Date of Patent: October 17, 2006
    Inventor: Moti Shai
  • Patent number: 7100739
    Abstract: A folding step stool includes a hinge mechanism. The step stool includes a first section connected to the hinge mechanism. The first section having a bottom step. The step stool includes a second section connected to the hinge mechanism. The step stool includes a third section connected to the hinge mechanism, wherein when the folding step is in and unfolded state, the first and second sections form a base on a floor and are in angular relationship with each other, and the third section extends upward from the hinge mechanism relative to the first section, and when the first, second and third sections are in a folded state, they are essentially in parallel with each other, are no more than ¾ as tall and ½ as long as when the step stool is in the unfolded state. A method for using a folding step stool. A hinge for a folding step stool having a folded and unfolded state and having a top rail, front rail and rear rail. A method for using a folding step stool.
    Type: Grant
    Filed: May 14, 2004
    Date of Patent: September 5, 2006
    Assignee: Werner Co.
    Inventors: Thomas W. Parker, John J. Fiumefreddo
  • Patent number: 7100740
    Abstract: The present invention teaches a boat trailer ladder which may be easily secured to and moved along the trailer rails. A hook is dimensioned and configured to engage standard boat trailer rails. An A-frame ladder provides steps from an approximately the level of the trailer rails, or in alternative embodiments from approximately ground level, up for a distance above the trailer rails. The extra elevation gained by a user of ordinary size standing on an upper step is sufficient to allow them to reach the top surfaces of the boat.
    Type: Grant
    Filed: April 20, 2004
    Date of Patent: September 5, 2006
    Inventor: Brian Robert Newton
  • Patent number: 7093321
    Abstract: A lockable hinge includes a first and second hinge member, a lock, and an actuator. The lockable hinge is coupled to a pair of ladder-leg sections and is arranged to allow the ladder-leg sections to move among closed, trestle-ladder, and straight-ladder positions. The lock is used to lock the hinge members to cause the ladder-leg sections to lock in the closed, trestle-ladder and straight-ladder positions.
    Type: Grant
    Filed: June 7, 2004
    Date of Patent: August 22, 2006
    Assignee: Cosco Management, Inc.
    Inventors: Philip W. Burbrink, Trevor S. Brown
  • Patent number: 7047597
    Abstract: Disclosed herein is a hinge for a folding ladder having first and second ladder frames. The hinge includes a main hinge unit, a subsidiary hinge unit, and a locking unit. The main hinge unit includes first and second support arms commonly mounted to an upper end of the first ladder frame, and first and second disc parts extending from upper ends of the first and second support arms, respectively, and being spaced apart from each other by a predetermined interval. The subsidiary hinge unit includes a subsidiary support arm mounted to an upper end of the second ladder frame, and a subsidiary disc part extending from an upper end of the subsidiary support arm, the subsidiary disc part being disposed between the first and second disc parts, with a plurality of notches being provided along a peripheral edge of the subsidiary disc part.
    Type: Grant
    Filed: February 17, 2004
    Date of Patent: May 23, 2006
    Inventor: Sang Kyu Lee
  • Patent number: 7007344
    Abstract: Disclosed herein is a safety unit of a hinge for a folding ladder to prevent a user's finger from being caught in the hinge when the hinge rotates. The hinge includes a first joint unit, a second joint unit, and a locking unit, and the safety unit is provided between a first stop shoulder of the first joint unit and a second stop shoulder of the second joint unit. The safety unit includes a mount part and an insert part. The mount part is provided in the first joint unit to be positioned under the first stop shoulder, and an inside portion of the mount part is rounded to surround a part of the first joint unit. The insert part extends from an upper end of the mount part, and is rounded to have the same curvature as the inside portion of the mount part.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: March 7, 2006
    Inventor: Chan Bok Lee
  • Publication number: 20040226773
    Abstract: A hinge and locking assembly includes a first support plate, a second support plate coupled to the first support plate for pivoting movement about an axis, a knob rotatable about the axis and a rotation limiter. The knob is movable axially along the axis between a first axial position and a second axial position The second support plate has a first tab-receiving space. The knob has a second tab-receiving space. The rotation limiter includes a slip disc rotatable about the axis and having first and second tabs. The first tab moves into the first tab-receiving space when the knob is moved from the first position to the second position. The second tab is received in the second tab-receiving space.
    Type: Application
    Filed: March 25, 2004
    Publication date: November 18, 2004
    Inventors: Jeffrey Beaver, Tom Meyers
  • Publication number: 20040129497
    Abstract: A folding ladder includes a hinge assembly having first and second ladder hinge plates each defining a plate opening and a plurality of locking slots. A housing is associated with the first ladder hinge plate and extends through the plate openings to provide a rotation axis for the plates, and the second plate is operable to rotate relative to the first plate about the rotation axis to selectively align slots of the first and second plates. A key outside the housing selectively engages aligned slots to selectively prevent rotation of the ladder hinge plates about the rotation axis and is operated by a manual rotation member. An extension ladder includes a pair of nested outer and inner ladder rails. Ladder rungs connected between and the inner rails define a plurality of supporting openings and the inner rails include outer bearing surfaces associated with the supporting openings.
    Type: Application
    Filed: May 28, 2003
    Publication date: July 8, 2004
    Inventor: Yoram Weiss
  • Patent number: 6719093
    Abstract: An extension ladder and tree stand for supporting a seated or standing person on an elevated platform against a tree trunk for hunting, photography, and the like. The ladder and platform collapse into a compact size and shape for carrying by a person. The ladder is in telescoping sections. Alternate steps of the ladder slide to the middle of each telescoping section. This provides twice as many steps as sections, reducing the number of telescoping sections by half. This minimizes weight, size, complexity, and expense. When deployed, all parts remain safely assembled in all positions. Captive spring loaded pins fix the telescoping sections in extended or retracted positions, and fix the sliding steps in a middle position of each section. A folding seat on the platform has a cushion that reconfigures into a back cushion for carrying the collapsed assembly on the back of a person.
    Type: Grant
    Filed: February 1, 2002
    Date of Patent: April 13, 2004
    Inventor: Michael R. Garbs
  • Publication number: 20030221910
    Abstract: A ladder assembly includes two symmetric support stands pivotally connected with each other. Each of the two support stands includes a main frame, an upper frame, a lower frame, a top bar, a retraction control unit, and four fixing devices. Thus, height of the ladder assembly can be adjusted easily and conveniently, thereby facilitating the user operating the ladder assembly. In addition, the upper frame and the lower frame can be folded on the main frame, so as to reduce the volume the ladder assembly efficiently, thereby greatly facilitating storage and transportation of the ladder assembly.
    Type: Application
    Filed: April 25, 2003
    Publication date: December 4, 2003
    Inventor: Kuo-Ching Huang
  • Publication number: 20030217888
    Abstract: A ladder having a first ladder section, a second ladder section, an adjustable hinge mechanism, an engagement indicator and a static hinge mechanism. The adjustable hinge mechanism is mounted with respect to the first ladder and the second ladder so that the adjustable hinge mechanism is moveable between an engaged position and a disengaged position. The static hinge mechanism enables the first and second ladder sections to be maintained in a stationary position with respect to each other.
    Type: Application
    Filed: February 6, 2003
    Publication date: November 27, 2003
    Inventors: Dennis Simpson, Ryan McMunn
  • Publication number: 20030188923
    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: Application
    Filed: April 5, 2002
    Publication date: October 9, 2003
    Inventor: Newell Ryan Moss
  • Publication number: 20030146047
    Abstract: A ladder having a first ladder section, a second ladder section, an adjustable hinge mechanism, and an engagement indicator. The adjustable hinge mechanism is mounted with respect to the first ladder and the second ladder so that the adjustable hinge mechanism is moveable between an engaged position and a disengaged position. When in the engaged position, the adjustable hinge mechanism retains the first ladder section in a stationary orientation with respect to the second ladder section. When in the disengaged position, the adjustable hinge mechanism permits the first ladder section to pivot with respect to the second ladder section. The engagement indicator is mounted on the adjustable hinge mechanism. The engagement indicator is visible when the adjustable hinge mechanism is in the disengage position. The engagement indicator is not visible when the adjustable hinge mechanism is in the engaged position.
    Type: Application
    Filed: May 16, 2002
    Publication date: August 7, 2003
    Inventor: Dennis Simpson
  • Publication number: 20030146046
    Abstract: A convertible ladder including a first ladder portion, a second ladder portion and a static hinge mechanism. The first ladder portion has a first locking mechanism proximate a first end thereof. The second ladder portion has a second locking mechanism proximate a first end thereof. The static hinge mechanism is attached to the first ladder portion with the first locking mechanism. The static hinge mechanism is attached to the second ladder portion with the second locking mechanism. The static hinge mechanism maintains the first ladder portion in a stationary relation with respect to the second ladder portion.
    Type: Application
    Filed: May 16, 2002
    Publication date: August 7, 2003
    Inventor: Dennis Simpson
  • Patent number: 6588547
    Abstract: A joint for an articulated ladder comprises two outer casing parts, two inner casing parts, an arched lock piece, and an extension spring. The inner casing parts pivotally engages with the outer casing parts and the arched lock piece is located in the inner casing parts. The spring has one hook end thereof engaging with the locating tab of one of the inner casing parts. The arched lock piece is an integral piece providing with two parallel arched parts spacing apart from each other. Each of the parallel arched parts further provides three short posts extending outward from a facial side thereof to be slidably received in the three arched openings on the inner casing parts respectively. A hook tongue extends outward from one of the flat connecting parts to engage with the other hook end of the spring.
    Type: Grant
    Filed: October 3, 2001
    Date of Patent: July 8, 2003
    Inventor: Chin-wen Yeh