EP4405557B1 - Tragbare leiter mit einer abstandsvorrichtung - Google Patents

Tragbare leiter mit einer abstandsvorrichtung

Info

Publication number
EP4405557B1
EP4405557B1 EP22793420.5A EP22793420A EP4405557B1 EP 4405557 B1 EP4405557 B1 EP 4405557B1 EP 22793420 A EP22793420 A EP 22793420A EP 4405557 B1 EP4405557 B1 EP 4405557B1
Authority
EP
European Patent Office
Prior art keywords
ladder
assembly
arms
spreader
ladder assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP22793420.5A
Other languages
English (en)
French (fr)
Other versions
EP4405557A1 (de
EP4405557C0 (de
Inventor
Caspar Bernard Lampe
Marcel Cornelis HOOIVELD
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LAMPE HOLDING BV
Original Assignee
LAMPE HOLDING BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LAMPE HOLDING BV filed Critical LAMPE HOLDING BV
Publication of EP4405557A1 publication Critical patent/EP4405557A1/de
Application granted granted Critical
Publication of EP4405557B1 publication Critical patent/EP4405557B1/de
Publication of EP4405557C0 publication Critical patent/EP4405557C0/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C1/00—Ladders in general
    • E06C1/02—Ladders in general with rigid longitudinal member or members
    • E06C1/14—Ladders capable of standing by themselves
    • E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
    • E06C1/20—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as poles
    • E06C1/22—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as poles with extensible, e.g. telescopic, ladder parts or struts
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C1/00—Ladders in general
    • E06C1/02—Ladders in general with rigid longitudinal member or members
    • E06C1/04—Ladders for resting against objects, e.g. walls poles, trees
    • E06C1/08—Ladders for resting against objects, e.g. walls poles, trees multi-part
    • E06C1/12—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic
    • E06C1/125—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic with tubular longitudinal members nested within each other
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/48—Ladder heads; Supports for heads of ladders for resting against objects
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/50—Joints or other connecting parts
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/14—Holders for pails or other equipment on or for ladders

Definitions

  • the present invention relates to a telescopic A-frame ladder.
  • A-frame ladders are self-supporting ladders, meaning they do not need to be leaned against a wall or other structure for stability.
  • A-frame ladders can be set up in an inverted V-shaped configuration, in which the ladder is free standing.
  • A-frame ladders can also be set up into a straight configuration, in which the two ladders are folded against each other, and in which the ladder is setup against a vertical surface, e.g. a wall.
  • A-frame ladders typically comprises a ladder and a frame, wherein the frame is hingedly connected to the ladder.
  • the frame is configured to fit the ladder, when in the straight configuration, enabling the frame to be positioned closely against, and partially receive, the ladder, providing a compact configuration.
  • the Ladder can be set up against a wall surface when in the straight configuration.
  • A-frame ladders that comprise two ladders, instead of a ladder and a frame, are also known. These ladders typically only allow for a set up in the A-configuration. In the straight configuration, the ladders are positioned adjacent to each other, which does not allow for the compact configuration that can be attained with an A-ladder comprising a frame.
  • telescopic A-frame ladders are known, i.e. A-frame ladders comprising two telescopic ladder assemblies.
  • the telescopic ladder assemblies have multiple ladder sections, each ladder section comprising two tubular stile members arranged parallel to each other and interconnected by at least one ladder rung, The stile members of the ladder sections are telescopically inserted into each other, so that the ladder sections can be moved relative to each other between an extended position and a collapsed position.
  • Prior art publications US2827216 , US4989692 and EP1686233 show A-frame ladders comprising two telescopically extendable and collapsible ladder sections. When set up in the inverted V-shaped configuration, the A-frame ladders are free standing. To enable the ladder to be set up against a wall, in the straight configuration the ladders are either folded in alignment with each other or are folded onto each other with one ladder partially collapsed.
  • Prior art publications US 2008/164097 A1 , CN104074455 and EP3165706 respectively show a stepladder with spread assembly and an A-frame ladder with a stand-off device.
  • the prior art designs have details that are not satisfactory, either with regard to their construction and/or their practical use.
  • the object of the present invention is to overcome at least some the disadvantages and problems with the prior art A-frame ladders by providing an A-frame ladder that is easy and safe to handle.
  • the invention therefore provides an A-frame ladder according to claim 1.
  • the A-frame ladder according to claim 1 comprises two telescopically extendable and collapsible ladder assemblies.
  • the A-frame ladder can be set up in an inverted V-shaped configuration, in which the ladder is free standing, and into a straight configuration, in which the ladders are folded onto each other.
  • the hinge axis is positioned relative to the top rung of the first and second ladder such that, when the two telescopic ladder assemblies are folded onto each other, both the first ladder assembly and the second ladder assembly can be in the extended configuration. Therefore, the ladder can be set up against a wall with both telescopic ladder assemblies in the extended configuration.
  • the first ladder assembly provides the support, i.e. is supported at both ends.
  • the first ladder assembly is at one end supported by the floor, and is at an opposite end supported by the wall, via the stand off device that is fixed to the first ladder assembly, while the second ladder assembly does not engage the floor or the wall. This provides for a stable set up.
  • switching from the A-configuration to the straight configuration does not require the user to unlock and partially collapse the second ladder assembly.
  • the A-frame ladder can be quickly and easily changed between the A-configuration and the straight configuration.
  • the configuration of a ladder according to the invention enables easy collapsing the ladder when in the straight configuration, when the manually operable release actuators on the bottom ladder sections are substantially level, and can thus be easily activated synchronous.
  • the present invention therefore provides an A-frame ladder that overcomes some the disadvantages and problems with the prior art A-frame ladders, and in particular provides an A-frame ladder that is easy and safe to handle.
  • An A-frame ladder according to claim 1 comprises:
  • the ladder assemblies each comprise ladder rungs, i.e. horizontal tubular members dimensioned and configured to support a person, and provided with a grip surface that provides a foot support.
  • An A-frame ladder according to the invention therefore differs from a step ladder comprising a ladder and a frame, which does not function as a ladder.
  • the rungs of the second ladder assembly are staggered relative to the rungs of the first ladder assembly, in the longitudinal direction of the ladder assemblies, when the first ladder assembly and the second ladder assembly are each collapsed, and the ladder is in the straight configuration, i.e. when the ladder is in the storage configuration.
  • the ladder comprises a lock assembly that secures the second ladder assembly relative to the first ladder assembly in the straight configuration.
  • the second ladder assembly is held, while in the extended position, adjacent the first ladder assembly when the ladder is set up against a wall.
  • the lock assembly is configured for securing the second ladder assembly against pivoting away from the first ladder assembly, when both ladder assemblies are collapsed and in the straight configuration, i.e. when the ladder is in the storage configuration.
  • a securing device e.g. a strip or bracket, is provided for securing the collapsed ladders relative to each other.
  • the two ladder assemblies preferably are substantially identical.
  • the ladders only differ at the lower ends, i.e. the configuration of the floor supports.
  • the stand off device comprises two mounts, each for engaging a ladder stile of the first ladder assembly, the mounts having a cylindrical shape for either receiving or being inserted into a tubular top end of the stile members.
  • the cylindrical shapes have a central axis that extends parallel to the ladder styles and at an angle with the stand off arms.
  • the stand off device is provided with mounts for receiving top ends of the stile members of the respective ladder assemblies.
  • the mounts for receiving the stile members of the second ladder assembly are hinged relative to the rest of the stand of device, more in particular can be hinged about the hinge axis, and thus hingedly connect the second ladder assembly with the stand off device and the first ladder assembly.
  • the two telescopic ladder assemblies comprise identical top ends.
  • the stand off device comprising mounts to secure the top ends of the respective ladder assemblies to the stand off device, is configured to position the hinge axis, in a longitudinal direction of the respective ladder assemblies, at different pivot distances relative to the top rung of the respective ladder assemblies.
  • the pivot distance i.e. the distance between the top rung of a ladder assembly and the hinge axis, is defined in the longitudinal direction of the respective ladder assemblies, i.e. in a direction parallel to the stile members of the respective ladder assembly, and with the ladder in the straight configuration, i.e. in a configuration in which the stile members of the first ladder assembly are parallel to the stile members of the second ladder assembly.
  • the first pivot distance is substantially the same or larger than the distance between two ladder rungs of the ladder assembly when in the extended configuration.
  • the ladder in the straight configuration, i.e. with both ladder assemblies fully extended, can be set up against the wall at an angle of at least 15 degrees, preferably at least 20 degrees, for example 25 degrees, with only the first ladder assembly supporting the A-frame ladder.
  • the ladder can be positioned with the stand off device against the wall, more in particular with the bumper end of the stand off device against the wall, the ladder enclosing an angle of at least 15 degrees, while the ladder is supported by the first ladder assembly only.
  • the first ladder assembly engages the floor while both ladder assemblies are fully extended.
  • the stand off arms are connected by one or more cross bars, the one or more cross bars running parallel to the rungs of the A-frame ladder, the one or more cross bars forming a surface, for example a platform or tool tray, and the rungs of the top ladder sections are spaced from the one or more cross bars.
  • the stile members of both ladder assemblies extend beyond the upper rungs of the respective ladder assemblies.
  • the distance between the upper rungs and the one or more cross bars is about the same or smaller than the distance between the rungs of the respective ladder assemblies when in the extended configuration.
  • the distance between the upper rungs and the one or more cross bars is similar to the distance between the rungs of the respective ladder assemblies when in the extended configuration.
  • the stand off arms of the stand of device and the platform are integrated into a single piece, e.g. are combined with cross bars that connect the two stand off arms.
  • the stand off device may comprise a single body to which the ladder assemblies are connected.
  • the ladder rungs are provided with top surface, i.e. a grip surface configured a person using the ladder to stand on, that is substantially horizontal when the ladder is in the A-configuration. Furthermore, when the ladder is in the A-configuration, the grip surfaces of the rungs of the first ladder assembly are substantially horizontal and are level with the grip surfaces of the rungs of the second ladder assembly.
  • the stand off arms extend at an angle to the stile members of the first ladder assembly, and the bumper ends are configured such that when the ladder is set up in the straight configuration against a wall, the grip surfaces of the rungs of the first ladder assembly are substantially horizontal.
  • a person using the ladder is provided with substantially horizontal grip surface when the ladder is set up in the A-configuration and when the ladder is set up in the straight configuration.
  • the stand off arms are connected by one or more cross bars that run parallel to the rungs and that form a surface that is substantially parallel to the grip surface of the ladder rungs of the first ladder assembly, when the ladder is in the straight configuration and when the ladder is in the A-configuration.
  • the surface that is formed by the cross bars is substantially horizontal when the ladder is in the A-configuration and when the ladder is set up in the straight configuration.
  • the telescopic ladder assemblies each have at least three ladder sections, each of said ladder sections having two tubular stile members arranged parallel to each other and interconnected at one end by a ladder rung to form a U-shaped ladder section, the stile members of each ladder section being telescopically inserted into the stile members of an adjacent ladder section.
  • the ladder assemblies typically comprises automatic latch mechanisms for locking the telescopically inserted stile members relative to one another when the ladder sections are extended, the latch mechanisms of each ladder section being associated with one or more actuators for unlocking the stile members in order to allow for collapsing of the ladder assembly.
  • the spreader assembly comprises a first spreader arm, which first spreader arm is at a first end hingedly connected to the first ladder assembly and a second spreader arm, which second spreader arm is at a first end hingedly connected to the second ladder assembly, and wherein the first spreader arm and the second spreader arm are each at a second end hingedly connected to each other, such that the spreader arms can be hinged between a deployed position, in which the spreader arms are extended, preferably are overextended, to secure the first ladder assembly and the second ladder assembly in the A-configuration, and a folded position, for when the A-frame ladder is in the straight configuration, in which folded position the spreader arms extend upwards from the ladder rungs and between the stile members of the top ladder sections.
  • the spreader arms When the spreader arms are in the extended position, they are essentially in line with each other. When overextended, the hinge point at which the spreader arms are connected to each other, is moved beyond the point at which the spreader arms are aligned. In this configuration, an extra effort is required to move the arms from the deployed position into the folded position.
  • first spreader arm is at a first end hingedly connected to the top rung of the first ladder assembly and the second spreader arm is at the first end hingedly connected to the top rung of the second ladder assembly.
  • the spreader arms of the spreader assembly are shorter than the first pivot distance, and preferably, when the A-frame ladder is in the straight configuration, the spreader arms do not extend beyond a top end of the stile members.
  • the spreader assembly comprises a hand grip, which hand grip enables a user to pull the spreader arms from the extended position, preferably from the overextended position, into the folded position, using the handgrip, and thus to move the ladder assemblies from the A-configuration into the straight configuration.
  • the hand grip is oriented to extend in a direction substantially parallel to the direction in which the rungs of the ladder extend.
  • Such a configuration facilitates a user of the ladder to collapse the spreader assembly by reaching between the stile members of the first ladder assembly, and pulling the hand grip in a direction that is generally upwards and towards the user when the ladder is in the A-configuration.
  • Such a spreader assembly furthermore enables bringing the ladder from the A-configuration into the straight configuration by a user without the need to reach around, or walk around, the side of the ladder to displace the spreaders.
  • the use of the hand grip helps to prevent the possibility of a user pinching their hands or fingers in the hinge of a spreader or spreader.
  • the spreader assembly comprises two parallel first arms, and two parallel second arms, the first arms each being connected at a first end to the top rung of the first ladder assembly and two parallel second arms each being connected at a first end to the top rung of the second ladder assembly, and wherein the first arms are each at a second end connected to a second end of one of the two second arms, and wherein the hand grip is provided between the two first arms, preferably near the second ends thereof.
  • the handgrip is connected to the first arms, preferably near the second ends thereof.
  • first arms are hingedly connected to the second arms via a hinge axle
  • the hand grip preferably is mounted on the hinge axle
  • the length of the first spreader arms differs from the length of the second spreader arms, such that, when the ladder is in the straight configuration, the spreader arms extend at an angle to the stile members of the first ladder assembly and extend beyond the stile members of the first ladder assembly, such that the handgrip is positioned outside the ladder, more in particular in front of the first ladder assembly, to enable a user to carry the ladder, in the collapsed and straight configuration, using the handgrip.
  • the spreader assembly is provided with locks for securing the spreader arms in the extended position.
  • first and the second ladder assembly each comprise a top ladder section, a bottom ladder section, and multiple intermediate ladder sections.
  • the stile members of the top ladder section and the intermediate ladder sections are telescopically inserted into the stile members of an adjacent lower ladder section, the adjacent lower ladder section being one of the intermediate ladder sections or the bottom ladder section, so that the one or more intermediate ladder sections and the top ladder section can be collapsed in a collapsing direction towards the bottom ladder section.
  • the top ladder section of each of the ladder assemblies has two tubular stile members arranged parallel to each other that are interconnected at an intermediate section by a ladder rung.
  • the intermediate ladder sections each have two tubular stile members arranged parallel to each other that are interconnected at a top end by a ladder rung,
  • the bottom ladder sections each have two tubular stile members arranged parallel to each other and interconnected by a top ladder rung and a bottom ladder rung,
  • the lock assembly is configured for securing the second ladder assembly against pivoting away from the first ladder assembly, when both ladder assemblies are collapsed and in the straight configuration, i.e. when the ladder is in the storage configuration.
  • the lock assembly is configured to be used when the ladder assemblies are extended and when the ladder assemblies are collapsed.
  • the ladder assembly can be extended and collapsed while the lock assembly is active, i.e. the ladder assemblies remain locked in the straight configuration when the ladder assemblies are collapsed or extended.
  • the lock assembly is provided on the lowest ladder section of the first ladder assembly and the second ladder assembly. This provides a user of the ladder with easy access to the lock assembly when the ladder assemblies are extended.
  • the lock assembly is integrated in the spreader assembly.
  • the spreader assembly preferably is provided at n intermediate ladder section, i.e. a ladder section that not comprises the top ladder rung or the bottom ladder rung.
  • the difference between the first pivot distance and the second pivot distance is in the range of 3-8 cm, preferably is in the range of 4-7 cm, for example is 6 cm.
  • the stile members of the first ladder assembly and the stile members of the second ladder assembly do not extend beyond the hinge axis.
  • the hinge axis more or less forms the pinnacle of the a-frame ladder when for example set up in the A-configuration. It is submitted that this feature is typical for A-frame ladders in general.
  • a supper structure is provided that does extend above the hinge axis, however, for example a frame to provide grip support for a user standing on the ladder. This supper structure is not a continuation or extension of the stile members of the ladder and does not comprise ladder rungs.
  • the first and the second ladder assembly each comprise a top ladder section, a bottom ladder section, and multiple intermediate ladder sections
  • the stile members of the top ladder section extend on opposite sides, i.e. below and above, of a top ladder rung, providing the top ladder section with a H-shape, and preferably the stile members of the top sections of the first and the second ladder assembly have the same length.
  • the top ladder section of the ladder assemblies only partially collapse, i.e. only the part of the stile members below the top ladder rung is telescopically received in the stile members of an intermediate ladder section.
  • the spreader assembly is provided between the top rungs of the ladder assemblies, preferably comprises first and second spreader arms that are connected to the top ladder rungs,
  • top ladder section with stile members that extend upward form the top ladder rung, thus provide a window, defined by the top ladder rungs, the part of the stile members extending upward from the top ladder rungs and optimally one or more cross bars of the stand off device, that can house the spreader arms, or at least part thereof, when the ladder is in the straight configuration.
  • the length of the first ladder assembly is identical to the length of the second ladder assembly.
  • the bottom ladder section and the intermediate ladder sections are provided with automatic latch mechanisms, said automatic latch mechanisms being adapted for automatically locking the stile members of the adjacent higher ladder section, the higher ladder section being one of the intermediate ladder sections or the top ladder section, in a fully extended position of said adjacent higher ladder section.
  • the automatic latch mechanisms of the intermediate ladder sections are each associated with a release actuator for unlocking the stile members of an adjacent higher ladder section in order to allow for automatic release and collapsing of the ladder assembly
  • the automatic latch mechanism of the bottom ladder section is associated with a manually operable release actuator for unlocking of the stile members of an adjacent higher ladder section, the adjacent higher ladder section being one of the multiple intermediate ladder sections, by a user in order to allow for a manually release and collapsing of the ladder assembly.
  • the length of the first ladder assembly is identical to the length of the second ladder assembly.
  • the rungs are connected with plastic connectors to the stile members, and the connectors of the first ladder assembly, due to the second ladder assembly being staggered relative to the first ladder assembly, are not level with the connectors of the second ladder assembly, and vice versa, when the ladder is in the straight configuration. Instead, the connectors of the second ladder assembly are located at least partially above the connectors of the first ladder assembly.
  • the hinge axis is aligned with a central axis of the stile members of the second ladder assembly.
  • the invention furthermore provides a method for using a ladder according to the invention, the method comprising:
  • the method comprises the steps:
  • Fig. 1 shows an exemplary embodiment of an A-frame ladder 1 according to the invention in a free standing A-configuration.
  • Fig. 2 shows the same ladder in a straight configuration.
  • the A-frame ladder 1 comprises a first telescopic ladder assembly 2 and a second telescopic ladder assembly 3.
  • the telescopic ladder assemblies are hingedly connected such that the second ladder assembly 3 is pivotal about a hinge axis 4 relative to the first ladder assembly 2 between the A-configuration and the straight configuration.
  • the ladder assemblies form an inverted V. This configuration enables a free standing set up on a floor.
  • the ladder assemblies are parallel to each other. This configuration enables a set up of the A-frame ladder against a wall, which will be discussed in more detail below.
  • the collapsible ladder assemblies each have multiple ladder sections 5.
  • Each ladder section comprises two tubular stile members 6 arranged parallel to each other and interconnected by at least one ladder rung 7. These ladder rungs are provided with a grip surface 8.
  • the ladder assemblies each comprise ladder rungs, i.e. horizontal tubular members dimensioned and configured to support a person, and provided with a grip surface that provides a foot support.
  • An A-frame ladder according to the invention therefore differs from a step ladder comprising a ladder and a frame, which does not function as a ladder.
  • the stile members 6 of the ladder sections 5 are telescopically inserted into each other, so that the ladder sections can be moved relative to each other between an extended position and a collapsed position.
  • the ladder of Fig. 1 is for example shown in an extend configuration in Fig. 1 and fig,. 2 and in a collapsed configuration in Fig. 5 and Fig. 6 .
  • the A-framer ladder is furthermore provided with a stand-off device 9, a spreader assembly 10, and a lock assembly 11.
  • the stand off device 9 is configured for supporting the ladder 1 in the straight configuration against a wall.
  • the stand off device 9 comprises two stand off arms 12, that each have a base end 13, fixed to a top end of the first ladder assembly, and a bumper end 14 for engaging the wall.
  • the spreader assembly 10 is configured for securing the second ladder assembly 3 against spreading away from the first ladder assembly 2, when the ladder 1 is set up in the A-configuration.
  • the spreader assembly secures the second ladder assembly relative to the first ladder assembly in the A-configuration, and prevents the ladder assemblies from pivoting away from each other when the ladder is loaded, e.g. by a person climbing the ladder.
  • the lock assembly 11 is configured for securing the second ladder assembly 3 relative to the first ladder assembly 2 in the straight configuration. Thus, when the ladder is set up against a wall, the second ladder assembly stays positioned adjacent the first ladder assembly.
  • the second ladder assembly 3 at a top end thereof, is hingedly connected to the stand off arms 12, between the base end 13 and the bumper end 14 thereof, such that the hinge axis 4 is in line with the stile members 6 of the second ladder assembly 3.
  • the hinge axis 4 is furthermore aligned with a central axis 15 of the stile members of the second ladder assembly 3.
  • the hinge axis 4 in a longitudinal direction of the respective ladder assemblies, is spaced relative to a top rung 16 of the first ladder assembly 2 at a first pivot distance 18, and is spaced relative to a top rung 17 of the second ladder assembly 3 at a second pivot distance 19, wherein the second pivot distance 19 is smaller than the first pivot distance 18, see Fig. 3 .
  • the pivot distance i.e. the distance between the top rung of a ladder assembly and the hinge axis, is defined in the longitudinal direction of the respective ladder assemblies, i.e. in a direction parallel to the stile members of the respective ladder assembly, and with the ladder in the straight configuration, i.e. in a configuration in which the stile members of the first ladder assembly are parallel to the stile members of the second ladder assembly.
  • the rungs 7 of the second ladder assembly 3 are level with the rungs 7 of the first ladder assembly 2 when the first and second ladder assembly are each extended and the ladder is set up on a floor 20 in the A-configuration. In this condition, the ladder 1 is thus supported by both the first ladder assembly 2 and the second ladder assembly 3 on the floor 20, see Fig.1 .
  • the first pivot distance 18 is substantially the same or larger than the distance between two ladder rungs of the ladder assemblies when in the extended configuration.
  • the rungs 7 of the second ladder assembly 3 are staggered relative to the rungs 7 of the first ladder assembly 2, in the longitudinal direction of the ladder assemblies, when the first ladder assembly 2 and the second ladder assembly 3 are each extended and the ladder is set up against a wall 21 in the straight configuration, see Fig. 2 .
  • the A-frame ladder in this condition is thus supported on the floor 20 by the first ladder assembly 2 only.
  • the bottom end of the lower stile members 6 of the second ladder assembly 3 do not engage the floor.
  • the first ladder assembly is at one end supported by the floor, and is at an opposite end supported by the wall, via the stand off device that is fixed to the first ladder assembly, while the second ladder does not engage the floor or the wall.
  • the hinge axis 4 is positioned relative to the top rung 16 of the first ladder assembly 2 and second ladder assembly 3 such that, when the two telescopic ladder assemblies are folded onto each other, i.e. in the straight configuration, both the first ladder assembly and the second ladder assembly can be in the extended configuration. Therefore, the ladder can be set up against a wall with both telescopic ladder assemblies in the extended configuration.
  • the first ladder provides the support, i.e. is supported at both ends.
  • the first ladder is at one end supported by the floor, and is at an opposite end supported by the wall, via the stand off device that is fixed to the first ladder, while the second ladder does not engage the floor or the wall. This provides for a stable set up.
  • the A-frame ladder 1 thus allows for switching from the A-configuration to the straight configuration without the user having to unlock and partially collapse the second ladder assembly.
  • the A-frame ladder can be quickly and easily changed between the A-configuration and the straight configuration.
  • the configuration of the a-frame ladder 1 facilitates collapsing the ladder when in the straight configuration, because the manually operable release actuators on the bottom ladder sections are substantially level, and can thus be easily activated synchronous.
  • the first ladder assembly 2 and the second ladder assembly 3 each comprise a top ladder section 29, a bottom ladder section 30, and multiple intermediate ladder sections 31.
  • the stile members 7 of the top ladder section 29 and the intermediate ladder sections 31 are telescopically inserted into the stile members of an adjacent lower ladder section, the adjacent lower ladder section being one of the intermediate ladder sections or the bottom ladder section, so that the one or more intermediate ladder sections and the top ladder section can be collapsed in a collapsing direction towards the bottom ladder section.
  • the stile members 6 of the top ladder section 29 extend on opposite sides, i.e. below and above, of a top ladder rungs.
  • the top ladder sections are provided with a H-shape.
  • the top ladder section 29 of the ladder assemblies only partially collapse, i.e. only the part of the stile members below the top ladder rung is telescopically received in the stile members of an intermediate ladder section.
  • the spreader assembly 10 is provided between the top rungs of the ladder assemblies and comprises first and second spreader arms that are connected to the top ladder rungs,
  • top ladder section with stile members that extend upward form the top ladder rung, provides a window, defined by the top ladder rungs, the part of the stile members extending upward from the top ladder rungs, and, in the embodiment shown, the cross bar of the stand off device.
  • the window houses part of the spreader arms, when the ladder is in the straight configuration.
  • the bottom ladder section 30 and the intermediate ladder sections 31 are provided with automatic latch mechanisms.
  • the automatic latch mechanisms are adapted for automatically locking the stile members of the adjacent higher ladder section, the higher ladder section being one of the intermediate ladder sections or the top ladder section, in a fully extended position of said adjacent higher ladder section.
  • the automatic latch mechanisms of the intermediate ladder sections are each associated with a release actuator for unlocking the stile members of an adjacent higher ladder section in order to allow for automatic release and collapsing of the ladder assembly.
  • the automatic latch mechanism of the bottom ladder section is associated with a manually operable release actuator 32 for unlocking of the stile members of an adjacent higher ladder section, the adjacent higher ladder section being one of the multiple intermediate ladder sections, by a user in order to allow for a manually release and collapsing of the ladder assembly.
  • the lock assembly is configured for securing the second ladder assembly against pivoting away from the first ladder assembly, when both ladder assemblies are collapsed and in the straight configuration, i.e. when the ladder is in the storage configuration.
  • the lock assembly is configured to be used when the ladder assemblies are extended and when the ladder assemblies are collapsed.
  • the ladder assembly can be extended and collapsed while the lock assembly is active, i.e. the ladder assemblies remain locked in the straight configuration when the ladder assemblies are collapsed or extended.
  • the stand off device 9 is provided with mounts 22 for receiving top ends of the stile members 6 of the respective ladder assemblies.
  • the mounts 22 have a cylindrical shape for receiving a tubular top end of the stile members.
  • the cylindrical shapes have a central axis that extends parallel to the ladder styles.
  • the two mounts 22 for engaging the stile members of the first ladder assembly 2 extend and at an angle with the stand off arms 12.
  • the two mounts 22 for receiving the stile members of the second ladder assembly 3 are hinged, more in particular can be hinged about the hinge axis 4, and thus hingedly connect the second ladder assembly 3 with the stand off device 9 and the first ladder assembly 2.
  • the two telescopic ladder assemblies comprise identical top ends. It is the stand off device, comprising the mounts 22 to secure the top ends of the respective ladder assemblies to the stand off device, that is configured to position the hinge axis 4, in a longitudinal direction of the respective ladder assemblies, at the different pivot distances relative to the top rung of the respective ladder assemblies.
  • the stand off arms 12 are connected by a cross bar 23.
  • the cross bar 23 runs parallel to the rungs 7 of the A-frame ladder 1, and forms a platform with a tool tray 25.
  • the rungs 7 of the top ladder sections are spaced from the cross bar.
  • the stile members 6 of both ladder assemblies extend beyond the top, or upper, rungs 16,17 of the respective ladder assemblies.
  • the cross bar 23 runs parallel to the rungs 7 and forms a platform, with the tool tray at its centre, that is substantially parallel to the grip surface 8 of the ladder rungs of the first ladder assembly 2, when the ladder 1 is in the straight configuration and when the ladder is in the A-configuration.
  • the platform that is formed by the cross bars is substantially horizontal when the ladder is in the A-configuration and when the ladder is set up in the straight configuration.
  • the stand off arms 12 extend at an angle to the stile members 6 of the first ladder assembly 2, and the bumpers, more in particular the bumper ends, are configured such that when the ladder is set up in the straight configuration against a wall, the grip surfaces 8 of the rungs 7 of the first ladder assembly 2 are substantially horizontal.
  • a person using the ladder is provided with substantially horizontal grip surface when the ladder is set up in the A-configuration and when the ladder is set up in the straight configuration.
  • the spreader assembly 10 comprises two parallel first spreader arms 26, which first spreader arms are at a first end hingedly connected to the top rung 16 of the first ladder assembly 2, and two parallel second spreader arms 28, which second spreader arms are at a first end hingedly connected to the top rung 17 of the second ladder assembly 3.
  • Each of the first spreader arms 26 is at a second end hingedly connected to a second end of one of the second spreader arms 27, such that the spreader arms can be hinged between a deployed position and a folded position.
  • the spreader arms 26, 27 of the spreader assembly 10 are extended, preferably are overextended, to secure the first ladder assembly 2 and the second ladder assembly 3 in the A-configuration, see Fig. 1 and Fig. 4 .
  • the spreader arms 26, 27 are in the extended position, they are essentially in line with each other.
  • the hinge point at which the spreader arms are connected to each other is moved beyond the point at which the spreader arms are aligned. In this configuration, an extra effort is required to move the arms from the deployed position into the folded position.
  • the spreader arms In the folded position the spreader arms extend upwards from the ladder rungs 7 and extend between the stile members 6 of the top ladder sections, when the A-frame ladder 1 is in the straight configuration, see Fig. 2 and Fig. 5 .
  • the spreader arms In the folded position, the spreader arms are hinged towards each other, such that they extend substantially parallel to each other, or at a shape angle to each other, providing a V-shape when seen in side view.
  • a hand grip 24 is provided between the two first spreader arms 26, near the second ends thereof.
  • the hand grip 24 enables a user to pull the spreader arms from the extended position, preferably from the overextended position, into the folded position, using the handgrip 24, and thus to move the ladder assemblies from the A-configuration into the straight configuration.
  • the hand grip or handle 24 is coupled to spreader arms without curtailing the folding nature of the spreader arms.
  • the hand grip 24 is oriented to extend in a direction substantially parallel to the direction in which the rungs 7 of the ladder extend.
  • Such a configuration facilitates a user of the ladder to collapse the spreader assembly by reaching between the stile members 6 of the first ladder assembly 2, and pulling the hand grip 24 in a direction that is generally upwards and towards the user when the ladder is in the A-configuration.
  • Such a spreader assembly furthermore enables bringing the ladder from the A-configuration into the straight configuration by a user without the need to reach around, or walk around, the side of the ladder to displace the spreaders.
  • the use of the hand grip helps to prevent the possibility of a user pinching their hands or fingers in the hinge of a spreader or spreader.
  • the spreader arms of the spreader assembly are shorter than the first pivot distance, and, when the A-frame ladder is in the straight configuration, the spreader arms do not extend beyond a top end of the stile members, see Fig. 2
  • the length of the first spreader arms 26 differs from the length of the second spreader arms 27, such that, when the ladder 1 is in the straight configuration, the spreader arms extend at an angle to the stile members 6 of the first ladder assembly 2 and extend beyond the stile members 6 of the first ladder assembly 2, such that the handgrip 24 is positioned outside the ladder, more in particular in front of the first ladder assembly, to enable a user to carry the ladder, in the collapsed and straight configuration, using the handgrip.
  • the lock assembly is provided on the lowest ladder section of the first ladder assembly and the second ladder assembly. This provides a user of the ladder with easy access to the lock assembly when the ladder assemblies are extended.
  • the lock assembly may comprise a hook that is resiliently mounted on a ladder section of the first ladder assembly, that, similar to a click finger, hooks behind a notch mounted on the second ladder assembly.
  • the lock assembly is integrated in the spreader assembly. In such an embodiment, the spreader assembly preferably is provided at n intermediate ladder section, i.e. a ladder section that not comprises the top ladder rung or the bottom ladder rung.
  • the stile members 6 of the first ladder assembly 2 and the stile members 6 of the second ladder assembly 2 do not extend beyond the hinge axis 4.
  • the hinge axis 4 more or less forms the pinnacle of the a-frame ladder when for example set up in the A-configuration, see Fig. 1 . It is submitted that this feature is typical for A-frame ladders in general.
  • the length of the first ladder assembly 2 is identical to the length of the second ladder assembly 3.
  • the rungs 7 are connected with plastic connectors 28 to the stile members 6. Due to the second ladder assembly 3 being staggered relative to the first ladder assembly 2, the connectors 28 of the first ladder assembly are not level with the connectors of the second ladder assembly when the ladder is in the straight configuration and vertical. Instead, the connectors of the second ladder assembly are located at least partially above the connectors of the first ladder assembly.
  • the hinge axis 4 is aligned with a central axis of the stile members 6 of the second ladder assembly 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)

Claims (15)

  1. Bockleiter (1), wobei die Leiter Folgendes umfasst:
    - eine erste teleskopische Leiteranordnung (2) und eine zweite teleskopische Leiteranordnung (3), die gelenkig verbunden sind, sodass die zweite Leiteranordnung (3) um eine Scharnierachse (4) relativ zu der ersten Leiteranordnung (2) zwischen einer geraden Auslegung, in der die Leiteranordnungen parallel zueinander sind, um die Leiter gegen eine Wand zu lehnen, und einer Bockauslegung, bei der die Leiteranordnungen ein umgekehrtes V für ein freistehendes Aufstellen auf einem Boden bilden, schwenkbar ist,
    wobei die Leiteranordnungen (2, 3) jeweils mehrere Leiterabschnitte (5) aufweisen, wobei jeder Leiterabschnitt zwei rohrförmige Holmelemente (6) umfasst, die parallel zueinander angeordnet und durch mindestens eine Leitersprosse (5) miteinander verbunden sind, wobei die mindestens eine Leitersprosse (5) mit einer Grifffläche (8) versehen ist, und wobei die Holmelemente (6) der Leiterabschnitte (5) teleskopartig ineinander eingeführt sind, sodass die Leiterabschnitte (5) relativ zueinander zwischen einer ausgefahrenen Position und einer eingefahrenen Position bewegt werden können;
    - eine Abstandsvorrichtung (9) zum Abstützen der Leiter (1) in der geraden Auslegung gegen die Wand, wobei die Abstandsvorrichtung zwei Abstandsarme (12) umfasst, die jeweils ein Basisende (13), das an einem oberen Ende der ersten Leiteranordnung (2) befestigt ist, und ein Dämpferende (14) zum Ineingriffkommen mit der Wand aufweisen;
    - eine Spreizanordnung (10), um die zweite Leiteranordnung (3) in der Bockauslegung gegen ein Wegspreizen von der ersten Leiteranordnung (2) zu sichern; und
    - eine Verriegelungsanordnung (11) zum Sichern der zweiten Leiteranordnung (3) relativ zu der ersten Leiteranordnung (2) in der geraden Auslegung;
    wobei die zweite Leiteranordnung (3), an einem oberen Ende davon, gelenkig mit den Abstandsarmen (12) zwischen dem Basisende (13) und dem Dämpferende (14) davon verbunden ist, so dass die Scharnierachse (4) in einer Linie mit den Holmelementen (6) der zweiten Leiteranordnung (3) ist, und
    wobei die Scharnierachse (4) in einer Längsrichtung der Leiteranordnungen (2, 3) relativ zu einer oberen Sprosse (16) der ersten Leiteranordnung (2) in einem ersten Schwenkabstand (18) beabstandet ist und relativ zu einer oberen Sprosse (17) der zweiten Leiteranordnung (3) in einem zweiten Schwenkabstand (19) beabstandet ist, und wobei der zweite Schwenkabstand (19) kleiner als der erste Schwenkabstand (18) ist,
    wobei die Sprossen der zweiten Leiteranordnung (3) auf Höhe der Sprossen der ersten Leiteranordnung (2) sind, wenn die erste Leiteranordnung (2) und die zweite Leiteranordnung (3) jeweils ausgefahren sind und die Leiter (1) in der Bockauslegung auf dem Boden aufgestellt ist und die Leiter (1) somit sowohl von der ersten Leiteranordnung (2) als auch von der zweiten Leiteranordnung (3) auf dem Boden abgestützt wird, und
    wobei die Sprossen der zweiten Leiteranordnung (3) relativ zu den Sprossen der ersten Leiteranordnung (2) in der Längsrichtung der Leiteranordnungen versetzt sind, wenn die erste Leiteranordnung (2) und die zweite Leiteranordnung (3) jeweils ausgefahren sind und die Leiter (1) in der geraden Auslegung gegen die Wand aufgestellt ist, und die Leiter (1) somit nur durch die erste Leiteranordnung auf dem Boden (2) abgestützt wird.
  2. Bockleiter nach Anspruch 1, wobei die Leiter (1) in der geraden Auslegung, d. h. bei der beide Leiteranordnungen (2, 3) vollständig ausgefahren sind, unter einem Winkel von mindestens 15 Grad, vorzugsweise mindestens 20 Grad, beispielsweise 25 Grad, gegen die Wand aufstellbar ist, wobei nur die erste Leiteranordnung (2) die Bockleiter (1) abstützt.
  3. Bockleiter nach Anspruch 1 oder Anspruch 2, wobei die Abstandsarme (13, 14) durch einen oder mehrere Querstäbe (23) verbunden sind, wobei der eine oder die mehreren Querstäbe (23) parallel zu den Sprossen (7) der Bockleiter (1) verlaufen, wobei der eine oder die mehreren Querstäbe (23) eine Oberfläche bilden, zum Beispiel eine Plattform oder eine Werkzeugschale (25), und wobei die Sprossen von oberen Leiterabschnitten (29) von dem einen oder den mehreren Querstäben (23) beabstandet sind.
  4. Bockleiter nach einem oder mehreren der vorhergehenden Ansprüche, wobei sich die Abstandsarme (13, 14) in einem Winkel zu den Holmelementen (6) der ersten Leiteranordnung (2) erstrecken und die Dämpferenden (14) so ausgelegt sind, dass, wenn die Leiter (1) in der geraden Auslegung gegen die Wand aufgestellt ist, die Griffflächen (8) der Sprossen (7) der ersten Leiteranordnung (2) im Wesentlichen horizontal sind.
  5. Bockleiter nach einem oder mehreren der vorhergehenden Ansprüche, wobei die Spreizanordnung (10) einen ersten Spreizarm (26), wobei der erste Spreizarm (26) an einem ersten Ende gelenkig mit der oberen Sprosse (16) der ersten Leiteranordnung verbunden ist, und einen zweiten Spreizarm (27), wobei der zweite Spreizarm (27) an einem ersten Ende gelenkig mit der oberen Sprosse (17) der zweiten Leiteranordnung (3) verbunden ist, umfasst, und wobei der erste Spreizarm (26) und der zweite Spreizarm (27) jeweils an einem zweiten Ende gelenkig miteinander verbunden sind, sodass die Spreizarme drehbar sind zwischen:
    einer Einsatzposition, in der die Spreizarme ausgefahren sind, vorzugsweise überausgefahren sind, um die erste Leiteranordnung (2) und die zweite Leiteranordnung (3) in der Bockauslegung zu sichern, und
    einer zusammengeklappten Position, wenn die Bockleiter (1) in der geraden Auslegung ist, wobei sich in der zusammengeklappten Position die Spreizarme von den Leitersprossen nach oben und zwischen den Holmen von oberen Leiterabschnitten (29) erstrecken.
  6. Bockleiter nach Anspruch 5, wobei die Spreizarme der Spreizanordnung (10) kürzer als der erste Schwenkabstand (18) sind, und wobei sich vorzugsweise, wenn sich die Bockleiter (1) in der geraden Auslegung befindet, die Spreizarme nicht über ein oberes Ende der Holmelemente (6) hinaus erstrecken.
  7. Bockleiter nach Anspruch 5 oder Anspruch 6, wobei die Spreizanordnung (10) einen Handgriff (24) umfasst, wobei der Handgriff es einem Benutzer ermöglicht, die Spreizarme unter Verwendung des Handgriffs aus der ausgefahrenen Position, vorzugsweise aus der überausgefahrenen Position, in die zusammengeklappte Position zu ziehen und somit die Leiteranordnungen aus der Bockauslegung in die gerade Auslegung zu bewegen.
  8. Bockleiter nach Anspruch 7, wobei die Spreizanordnung (10) zwei parallele erste Arme (26) und zwei parallele zweite Arme (27) umfasst, wobei die ersten Arme jeweils an einem ersten Ende mit der oberen Sprosse (16) der ersten Leiteranordnung (2) verbunden sind und wobei zwei parallele zweite Arme (27) jeweils an einem ersten Ende mit der oberen Sprosse (17) der zweiten Leiteranordnung (3) verbunden sind, und wobei sich die ersten Arme (26) jeweils an einem zweiten Ende befinden, das mit einem zweiten Ende eines der zwei zweiten Arme (27) verbunden ist, und wobei der Handgriff (24) zwischen den zwei ersten Armen (26) bereitgestellt ist, vorzugsweise nahe den zweiten Enden davon, wobei der Handgriff (24) vorzugsweise mit den ersten Armen (26) verbunden ist, vorzugsweise nahe den zweiten Enden davon, oder wobei die ersten Arme (26) über eine Scharnierachse gelenkig mit den zweiten Armen (27) verbunden sind und wobei der Handgriff (24) vorzugsweise auf der Scharnierachse gelagert ist.
  9. Bockleiter nach Anspruch 7 oder Anspruch 8, wobei sich die Länge der ersten Spreizarme (26) von der Länge der zweiten Spreizarme (27) unterscheidet, sodass sich, wenn sich die Leiter (1) in der geraden Auslegung befindet, die Spreizarme in einem Winkel zu den Holmelementen der ersten Leiteranordnung (2) erstrecken und sich über die Holmelemente der ersten Leiteranordnung hinaus erstrecken, so dass der Handgriff (24) außerhalb der Leiter (1) positioniert ist, insbesondere vor der ersten Leiteranordnung (2), um es einem Benutzer zu ermöglichen, die Leiter (1) in der zusammengeklappten und geraden Auslegung unter Verwendung des Handgriffs (24) zu tragen.
  10. Bockleiter nach einem oder mehreren der vorhergehenden Ansprüche, wobei die Verriegelungsanordnung dazu ausgelegt ist, die zweite Leiteranordnung (3) gegen ein Wegschwenken von der ersten Leiteranordnung (2) zu sichern, wenn beide Leiteranordnungen zusammengeklappt und in der geraden Auslegung sind, d. h. wenn sich die Leiter (1) in einer Aufbewahrungsauslegung befindet.
  11. Bockleiter nach einem oder mehreren der vorhergehenden Ansprüche, wobei die Verriegelungsanordnung in die Spreizanordnung integriert ist und/oder wobei die Verriegelungsanordnung einen Haken, der elastisch an einem Leiterabschnitt der ersten Leiteranordnung (2) montiert ist, und eine Kerbe, die an der zweiten Leiteranordnung (3) montiert ist, umfasst, oder umgekehrt, sodass, wenn die erste Leiteranordnung (2) gegen die zweite Leiteranordnung (3) geklappt wird, der Haken hinter der Kerbe einhakt.
  12. Bockleiter nach einem oder mehreren der vorhergehenden Ansprüche, wobei die erste Leiteranordnung (2) und die zweite Leiteranordnung (3) jeweils einen oberen Leiterabschnitt (29), einen unteren Leiterabschnitt (30) und mehrere Zwischenleiterabschnitte (31) umfassen, wobei sich vorzugsweise die Holmelemente der oberen Leiterabschnitte (29) auf gegenüberliegenden Seiten, d. h. unter und über, der Leitersprosse erstrecken, wodurch die oberen Leiterabschnitte (29) mit einer H-Form versehen werden und die Holmelemente der oberen Leiterabschnitte (29) der ersten Leiteranordnung (2) und der zweiten Leiteranordnung (3) die gleiche Länge aufweisen.
  13. Bockleiter nach einem oder mehreren der vorhergehenden Ansprüche, wobei die Länge der ersten Leiteranordnung (2) identisch mit der Länge der zweiten Leiteranordnung (3) ist und/oder die Scharnierachse (4) mit einer mittleren Achse der Holmelemente (6) der zweiten Leiteranordnung (3) ausgerichtet ist.
  14. Bockleiter nach einem oder mehreren der vorhergehenden Ansprüche, wobei die Sprossen (7) mit Kunststoffverbindern (28) mit den Holmelementen (6) verbunden sind und wobei die Verbinder (28) der ersten Leiteranordnung (2) aufgrund der Versetzung der zweiten Leiteranordnung (3) relativ zu der ersten Leiteranordnung (2) nicht auf einer Höhe mit den Verbindern (26) der zweiten Leiteranordnung (3) sind, und umgekehrt, wenn sich die Leiter (1) in der geraden Auslegung befindet.
  15. Verfahren zur Verwendung der Leiter nach einem oder mehreren der vorhergehenden Ansprüche, wobei das Verfahren Folgendes umfasst:
    - Verriegeln der zweiten Leiteranordnung (3) relativ zu der ersten Leiteranordnung (2) und Ausfahren der ersten Leiteranordnung (2) und der zweiten Leiteranordnung (3); und
    - Aufstellen der Leiter (1), wobei beide Leiteranordnungen ausgefahren sind, in gerader Auslegung gegen die Wand.
EP22793420.5A 2021-09-22 2022-09-21 Tragbare leiter mit einer abstandsvorrichtung Active EP4405557B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2029224A NL2029224B1 (en) 2021-09-22 2021-09-22 Portable ladder with a stand off device
PCT/EP2022/076240 WO2023046760A1 (en) 2021-09-22 2022-09-21 Portable ladder with a stand off device

Publications (3)

Publication Number Publication Date
EP4405557A1 EP4405557A1 (de) 2024-07-31
EP4405557B1 true EP4405557B1 (de) 2025-09-17
EP4405557C0 EP4405557C0 (de) 2025-09-17

Family

ID=79170931

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22793420.5A Active EP4405557B1 (de) 2021-09-22 2022-09-21 Tragbare leiter mit einer abstandsvorrichtung

Country Status (4)

Country Link
EP (1) EP4405557B1 (de)
CN (1) CN118382745A (de)
NL (1) NL2029224B1 (de)
WO (1) WO2023046760A1 (de)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2827216A (en) 1955-05-25 1958-03-18 Leonard B Napolitano Telescopic step or rung ladders
BE1004040A6 (fr) 1989-06-16 1992-09-15 Show Min Liaw Echelle extensible a usages multiples.
EP1686233A1 (de) 2005-02-01 2006-08-02 Telesteps AB Zusammenlegbare Mehrzweckleiter
US20080164097A1 (en) * 2006-02-01 2008-07-10 Telesteps Ab Collapsible Combination Ladder
CN104074455B (zh) * 2013-03-25 2018-03-27 阿禄因康株式会社 一种梯凳止开装置
US10550638B2 (en) * 2015-11-09 2020-02-04 Louisville Ladder Inc. Stepladder adapted for use as a single ladder or an extension ladder

Also Published As

Publication number Publication date
CN118382745A (zh) 2024-07-23
NL2029224B1 (en) 2023-03-29
EP4405557A1 (de) 2024-07-31
WO2023046760A1 (en) 2023-03-30
EP4405557C0 (de) 2025-09-17

Similar Documents

Publication Publication Date Title
US9488003B2 (en) Portable ladder with a stand off device
CN111315954B (zh) 梯子的穿行和支座机构、结合有该机构的梯子和相关方法
JP2013507544A5 (de)
RU2425938C2 (ru) Складная платформа
US20100230208A1 (en) Convertible multipurpose ladder stabilizers
US7255198B1 (en) Tripod extension stepladder
EA012890B1 (ru) Складная комбинированная лестница
WO2010084135A1 (en) A ladder
EP4405557B1 (de) Tragbare leiter mit einer abstandsvorrichtung
CN1997800A (zh) 阁楼楼梯组件
KR102371325B1 (ko) 접철식 사다리, a자형 접철식 사다리, 우마형 접철식 사다리
US4926964A (en) Step/extension ladder
EP1447520B1 (de) Leiterzusatzteil
US20080164097A1 (en) Collapsible Combination Ladder
GB2437735A (en) Collapsible, portable, free-standing scaffold
GB2398339A (en) Combined telescopic extension and stand off for ladder
US12497833B2 (en) Means for collapsible step ladder
US20240368941A1 (en) Means for collapsible step ladder
WO2019020552A1 (en) PAINTING EQUIPMENT
AU2003252945B2 (en) A ladder
WO2019209235A1 (ru) Лестница-стремянка
GB2437736A (en) Collapsible, portable, free-standing scaffold
GB2078840A (en) Ladder

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20240405

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20250414

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

P01 Opt-out of the competence of the unified patent court (upc) registered

Free format text: CASE NUMBER: APP_32311/2025

Effective date: 20250703

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602022021675

Country of ref document: DE

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20251020

Year of fee payment: 4

U01 Request for unitary effect filed

Effective date: 20251010

U07 Unitary effect registered

Designated state(s): AT BE BG DE DK EE FI FR IT LT LU LV MT NL PT RO SE SI

Effective date: 20251016

P04 Withdrawal of opt-out of the competence of the unified patent court (upc) registered

Free format text: CASE NUMBER: APP_32311_1/2025

Effective date: 20251016

U20 Renewal fee for the european patent with unitary effect paid

Year of fee payment: 4

Effective date: 20251017