EP2998501A1 - Ensemble d'échelle téléscopique - Google Patents
Ensemble d'échelle téléscopique Download PDFInfo
- Publication number
- EP2998501A1 EP2998501A1 EP15188391.5A EP15188391A EP2998501A1 EP 2998501 A1 EP2998501 A1 EP 2998501A1 EP 15188391 A EP15188391 A EP 15188391A EP 2998501 A1 EP2998501 A1 EP 2998501A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ladder
- rung
- actuators
- assembly according
- 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.)
- Granted
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 230000000295 complement effect Effects 0.000 claims abstract description 4
- 230000008878 coupling Effects 0.000 claims abstract description 4
- 238000010168 coupling process Methods 0.000 claims abstract description 4
- 238000005859 coupling reaction Methods 0.000 claims abstract description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 230000009194 climbing Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000004247 hand Anatomy 0.000 description 2
- 239000011796 hollow space material Substances 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 210000003811 finger Anatomy 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
Images
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
- E06C1/04—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
- E06C7/08—Special construction of longitudinal members, or rungs or other treads
- E06C7/082—Connections between rungs or treads and longitudinal members
- E06C7/086—Connections between rungs or treads and longitudinal members with a connecting piece inserted in a hollow rung
Definitions
- the present invention relates to a telescopically extendable and collapsible ladder assembly having 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 assembly further comprises automatic latch mechanisms for locking the telescopically inserted stile members relative to one another when the ladder sections are extended, the latch mechanisms being associated with one or more actuators for unlocking the stile members in order to allow for collapsing of the ladder assembly.
- ladder assemblies have become quite popular as portable ladders, such as a straight telescopic ladder or a step ladder, but also for stationary mounting, such as a loft ladder providing access to a loft.
- the present invention aims to propose measures that allow for improvements. These measures can either be applied alone or in combination. In a most preferred embodiment of the invention all measures are applied in a ladder assembly to obtain an optimum result.
- the present invention relates to a ladder assembly according to the preamble of claim 1.
- each ladder section includes a connector at each end of a rung, the connector having a rung portion connected to the end of the rung and having a front and a rear collar segment, each integral at one end thereof with the rung portion, the two collar segments substantially encircling the stile member, the collar segments having spaced apart opposed ends, a fastener assembly being provided bridging the opposed ends of the collar segments for rigidly coupling the collar segments around the stile member.
- the opposed ends lie along the longitudinal axis of the rung.
- the ends have a lateral protruding boss to accommodate the bolt and nut which pull the ends towards one another in order to fix the collar around the stile member.
- This lateral protruding boss is awkward, in particular in view of storage of the ladder, e.g. in a small cabinet or in a van.
- WO2007/079379 a different design of connector is shown which has two pieces.
- the one piece is connected to the rung and includes a half of the collar.
- the other piece is a collar half, that is fastened by two bolts on the other piece.
- the dividing plane (where the ends of the collar halves meet) lies at right angles to the longitudinal axis of the rung.
- the invention aims to provide a telescopic ladder assembly according to the preamble of claim 1, having an improved design with respect to ladder manufacturing and handling of the ladder.
- a ladder assembly according to the preamble of claim 1, which is characterized in that the first collar segment extends over an angle of between 120 and 150 degrees, more preferably between 130 and 140 degrees, with respect to the longitudinal axis of the rung, whereas the second collar segment extends over a complementary angle.
- the outer face of the collar segments at the opposed ends thereof form a substantially triangular protrusion with respect to adjacent portions of the outer face of the collar segments. It is noted that this design can be used advantageously for the telescopic ladders wherein the actuators are located in close proximity to the stile member.
- first collar segment is the front collar segment and the second collar segment is the rear collar segment.
- a telescopic ladder assembly e.g. a straight ladder
- has automatic latch mechanisms e.g. at each end of a rung
- one or more associated manually operable actuators for unlocking the stile members in order to allow for collapsing of the ladder assembly, wherein these one or more actuators are arranged centrally on a ladder rung (preferably on the front) and are operable simultaneously with a single hand of the user.
- a damper allows to obtain a very controlled motion of the ladder section upon collapse of the ladder.
- the user can now operate the one or more actuators simultaneously with one hand and use - at the same time - his other hand to guide the descending ladder section and/or stabilize the ladder during this operation. This allows for safe and gentle handling of the ladder during collapse, and avoids fast motions and undesirable impacts of the descending ladder sections as can be observed in known telescopic ladders.
- EP 1 402 143 it is disclosed to mount the actuators at the front of the rung and in close proximity to the stile members so that each actuator is manually and individually operable by a user holding his hands around the stile members, in particular around the connectors at the upper end of the stile members.
- This prior art design thus requires the user to hold both his hands around the ladder stiles during the collapse of the ladder. It is alleged that this design increases safety for the user with regard of a user's hand being seized between two rungs upon collapse of a ladder. Whilst that may be correct from said perspective, this arrangement does not take into account the fact that in many situations the user also needs to stabilize the ladder so it does not sway or hit against something during the collapse.
- the actuators are arranged centrally on the front side of the rung so as to be operable simultaneously with a single hand, wherein the front wall of the rung has an elongated recessed portion over the length thereof and the actuators are arranged in said recessed portion, each actuator having a rear extension, extending through a slot in said front wall into the interior of the rung, each of said rear extensions being connected to an operating rod which extends inside said rung to the latch mechanism at the outer end of the rung.
- the actuators are slidable actuators, sliding within the recessed portion of the front wall.
- Arranging the, preferably slidable, actuators in the elongated recessed portion has the advantage that the actuators are generally protected from the feet of a person on the ladder, yet can have a suitable thickness to be operated by a single hand, e.g. by thumb and index finger.
- the slots or single contiguous slot in the front wall are preferably located in the recessed portion of the front wall.
- the actuators are effectively arranged at a mutual distance of less than 10 centimetres to facilitate single handed operation.
- the actuators protrude at the front of the rung at most 10 mm from the rung, preferably at most 5 millimetres, more preferably between 1 and 4 millimetres.
- the location of these actuators in the elongated recessed portion of the front wall provides protection for the actuators.
- "some forward protrusion" of these centrally located actuators cause the effect that the actuators provide additional grip for a hand grasping around the central portion of the rung. In practice the actuators will fall in the palm of the hand and so provide additional grip.
- the ladder rungs are made from an extruded aluminium tubular profile, the profile including a top wall, a bottom wall, as well as a front and a rear wall extending between the top wall and the bottom wall.
- a telescopic ladder assembly is provided with a rung wherein the front wall and the rear wall of the rung each have an elongated recessed portion over the length thereof, the recessed portion having a height of preferably between 15 and 25 millimetres, the recessed portion having a depth of at least 2 millimetres.
- recessed portions in the front and rear wall give the rung an enhanced stability, allowing in particular the provision of one or more holes or slots in said recessed wall portion in the central region of the rung for the mounting of one or more actuators associated with the latch mechanisms.
- the top wall is in cross section upwardly convex, and the bottom wall is in cross section upwardly concave, preferably of substantially identical curvature.
- front wall and the rear wall are symmetrical.
- FIGS 1 and 2 show an example of a ladder assembly, here embodied as a straight telescopic ladder 1.
- the ladder assembly may also be part of another "ladder product" such as a stepladder or combination ladder, a work platform with ladder like telescopic legs, etc.
- the ladder 1 includes a lowermost ladder section 2 having two tubular stile members 2a, b which are arranged parallel to each other.
- Each stile member 2a, b of the lowermost ladder section 2 here is provided with a ground engaging foot member 2c (e.g. of rubber or the like).
- the stile members 2a, b are interconnected at their upper ends by a ladder rung 2d and in this example (as is preferred) also by a lowermost ladder rung 2e.
- the ladder 1 further comprises at least two additional ladder sections; here seven additional ladder sections 3-9.
- These ladder sections 3-9 each have two tubular stile members arranged parallel to each other and interconnected at the upper end by a ladder rung to form a U-shaped ladder section.
- the stile members of each ladder section are telescopically inserted into the stile members of a lower and adjacent ladder section.
- the ladder 1 further comprising automatic latch mechanisms (as will be explained by example in more detail below) for locking the telescopically inserted stile members relative to one another when the ladder sections are extended, the latch mechanisms being associated with actuators for unlocking the stile members in order to allow for collapsing or retracting of the ladder assembly.
- automatic latch mechanisms as will be explained by example in more detail below
- actuators are manually operated actuators, indicated with reference numeral 10 in figure 1 ,
- the actuators 10 are the slidable actuators and are arranged centrally on the front side of the rung 2d so as to be operable simultaneously with a single hand.
- the rungs 2d-9d are connected to the associated stile members 2a, b via connectors 2f, g of which preferred embodiments will be illustrated with reference to figures 9a-d .
- Figures 3, 4, 6 show a preferred design of a rung for a telescopic ladder, which is preferably incorporated in a ladder according to the invention.
- rung is considered to be any of the rungs of the ladder 1 of figure 1 , so that reference numeral 2d is used here.
- the rung 2d is made from an extruded aluminium tubular profile, the profile including a top wall 41, a bottom wall 42, as well as a front wall 43 and a rear wall 44 extending between the top wall and the bottom wall.
- the front wall 41 here corresponds to the side on which the slidable actuators 10 are mounted. As can be seen in figure 1 the slidable actuators 10 are arranged on the front side of the rung.
- top wall 41 is in cross section upwardly convex, whereas the bottom wall 42 is in cross section upwardly concave.
- the curvature is identical so that in a design of the ladder wherein the rungs contact one another in collapsed state of the ladder (as is preferred) the top wall and bottom wall are in close contact (see figure 4 ). This provides stability of the ladder in said collapsed condition and avoids items entering in the space between the rungs.
- the front wall has an elongated recessed portion 43a extending over the entire length thereof. This recessed portion is offset inwardly with respect to the above and below located edge portions 43b, c of the front wall 43.
- the rear wall has a similar recessed portion 44a.
- the front wall and rear wall are symmetrical. These recessed portions extend over a substantial portion of the height of the respective front and rear wall, preferably over at least 15 millimetres, more preferably between 15 and 25 millimetres. The depth may vary, and lies preferably between 3 and 6 millimetres.
- the rungs have a great stability, even when weakened by one or more holes or slots in a central region of the rung to accommodate one or more actuators for the latch mechanisms.
- the upper surface of the top wall of the rung is preferably provided with a pattern of axial grooves/ribs to avoid slipping of the feet of a person climbing the ladder.
- the slidable actuators 10 are arranged in said recessed portion 43a.
- the slidable actuators 10 are arranged centrally on the front side of the rung 2d -9d so as to be operable simultaneously with a single hand.
- each rung 2d is provided with two slots in the recessed portion 43a and each actuator 10 has a rear extension portion 11, which extends through a slot into the interior of the rung (see figure 6 ).
- each of said rear extension portions 11 is connected to an operating rod (partly shown in figure 9b with reference numeral 60) which extends inside said rung to the latch mechanism (not shown) at the outer end of the rung.
- the slidable actuators 10 are not fully hidden within the recess, but protrude at the front of the rung at most 10 mm from the front side of the rung, preferably at most 5 millimetres, more preferably between 1 and 4 millimetres. This is depicted in figure 6 showing a forward protrusion of 2 mm.
- the actuators 10 are damaged by the feet of someone climbing or descending the ladder and/or during storage and transportation.
- the manual slide actuators 10 are spaced apart at most 15 centimetres, more preferably at most 10 centimetres. This allows for easy single hand operation of both actuators 10 in a central portion of the rung, so that the operator or ladder user can use his or hers other hand for other purposes, e.g. holding the ladder stable by grabbing the ladder at a higher location than the actuators 10 to be operated for release of a ladder section.
- the slidable actuators 10 preferably have a height of at least 10 millimetres, preferably between 15 and 25 millimetres.
- the rear extension portions 11 of the actuators 10 preferably include a snap provision adapted to snap around the rod. This facilitates the assembly process of the ladder assembly.
- FIGS 9a-d show a connector, here connector 2f, which connects a rung (such as rung 2d) at an end thereof to the upper end of a stile member (here 2a). It is noted that preferably all connectors of a ladder assembly are of generally the same design, albeit with dimensions adapted to the diameter of the stile member (as is shown in figure 1 and common for this field).
- the connector 2f has a body (here of a unitary plastic design) having a rung portion 50, which is here -as is preferred - adapted to be inserted into the end of the rung and be fastened therein (e.g. by press fit or otherwise).
- the connector body further includes a first or front collar segment 52 and a second or rear collar segment 54, these segments 52, 54 each being integral at one end thereof with the rung portion 50.
- the two collar segments 52, 54 substantially encircle the stile member.
- the collar segments 52, 54 have slightly spaced apart opposed ends and a fastener assembly is provided bridging the opposed ends of the collar segments for rigidly coupling the collar segments around the stile member.
- the first collar segment 52 extends over angle of between 120 and 150 degrees, more preferably between 130 and 140 degrees, with respect to the longitudinal axis 55 of the rung, whereas the second collar segment 54 extends over a complementary angle.
- the first collar segment extends over 135 degrees which is preferred.
- the opposed ends of the collar segments are provided with a bore 56 through which a screw or bolt is fitted (not shown), the bore e.g. having at one end a recess for a bolt head and a nut being recessed in the opposed collar segment end.
- the outer face of the collar segments 52, 54 - at the opposed ends thereof - form a substantially triangular protrusion 57 with respect to adjacent portions of the outer face of the collar segments (as can be seen in figures 9a,b ).
- This protrusion 57 provides a body portion for accommodation of a fastener, such as a screw or a bolt, in a manner which is not laterally extending as with the Telesteps ladders. It has been found that this orientation of the split between the collar segments allows easy and accurate tensioning of the collar around the style, better than the known 180 degrees design and better and easier than the mentioned 90 degrees design of Core Distribution.
- the body of the connector preferably is made of plastic material, preferably as a unitary body by injection moulding, preferably of fibre reinforced plastic material.
- the body of the connector here includes a passage 58 for a locking pin 60 (which can form an extension of or be connected to the mentioned rod attached to the slide actuators 10) and allows to accommodate a spring 61 for biasing said locking pin 60 towards a locked position (commonly the stile member having an associated locking pin opening to receive said locking pin in extended state of the ladder section).
- the invention may be applied in combination with telescopic ladder assemblies having actuators in close proximity to the ladder stile members, e.g. manual operated or automatic as in EP 527 766 .
- the automatic latch mechanisms of the inventive ladder each include a locking pin having a length which is sufficient for extending through a locking hole of the ladder section positioned there above and into the hollow space inside the stile member and the stile member having an extension below the locking hole, so that when an upper ladder section is released and telescopically inserted into an intermediate ladder section, which is locked in relation to a lower ladder section by the locking pin of the lower ladder section engaging the locking hole of the intermediate ladder section, the upper ladder section being stopped in a safety position from being fully inserted in the intermediate ladder section, by a safe distance, e.g. between 3 and 10 cm, by engagement of the extension of the lower ends of the stile members of the upper ladder section with the locking pins of the lower ladder section extending through the locking holes into the hollow space of the stile members of the intermediate ladder section.
- a safe distance e.g. between 3 and 10 cm
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ladders (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1034629 | 2007-11-02 | ||
EP08705071.2A EP2215323B1 (fr) | 2007-11-02 | 2008-01-30 | Ensemble d'échelle télescopique |
PCT/NL2008/000033 WO2009057995A1 (fr) | 2007-11-02 | 2008-01-30 | Ensemble échelle télescopique |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08705071.2A Division EP2215323B1 (fr) | 2007-11-02 | 2008-01-30 | Ensemble d'échelle télescopique |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2998501A1 true EP2998501A1 (fr) | 2016-03-23 |
EP2998501B1 EP2998501B1 (fr) | 2018-10-10 |
EP2998501B8 EP2998501B8 (fr) | 2018-12-26 |
Family
ID=39684326
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15188391.5A Active EP2998501B8 (fr) | 2007-11-02 | 2008-01-30 | Ensemble d'échelle télescopique |
EP08705071.2A Active EP2215323B1 (fr) | 2007-11-02 | 2008-01-30 | Ensemble d'échelle télescopique |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08705071.2A Active EP2215323B1 (fr) | 2007-11-02 | 2008-01-30 | Ensemble d'échelle télescopique |
Country Status (3)
Country | Link |
---|---|
EP (2) | EP2998501B8 (fr) |
CN (2) | CN101918671B (fr) |
WO (1) | WO2009057995A1 (fr) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8225906B2 (en) | 2008-08-22 | 2012-07-24 | Core Distribution, Inc. | Extendable/retractable ladder |
WO2011043663A1 (fr) | 2009-10-07 | 2011-04-14 | Lampe Holding B.V. | Echelle portable comportant un dispositif de recul |
CN102140872A (zh) * | 2011-03-05 | 2011-08-03 | 宁波超腾照明电器有限公司 | 一种气阻缓降自动收拢的安全伸缩梯 |
CN102733751B (zh) * | 2012-06-26 | 2015-02-25 | 宁波兴富工具有限公司 | 防夹手的安全伸缩梯 |
FR3006361B1 (fr) | 2013-05-29 | 2015-05-15 | Zhuhai Quan Da Industry Commerce Co Ltd | Echelle telescopique |
EP3183410B1 (fr) | 2014-08-18 | 2019-07-24 | Lampe Holding B.V. | Ensemble échelle télescopique |
US9580959B2 (en) | 2014-12-02 | 2017-02-28 | Core Distribution, Inc. | Foldable ladder |
US9416591B2 (en) | 2014-12-02 | 2016-08-16 | Core Distribution, Inc. | Telescoping ladder with stabilizers |
US10233692B2 (en) | 2014-12-02 | 2019-03-19 | Core Distribution, Inc. | Foldable ladder |
CA3130716C (fr) * | 2014-12-02 | 2023-09-26 | Core Distribution, Inc. | Echelle pliable |
CN206129129U (zh) * | 2016-08-31 | 2017-04-26 | 东莞威信运动用品有限公司 | 伸缩管缓冲导向结构 |
EP3538733B1 (fr) * | 2016-11-14 | 2022-01-05 | Lampe Holding B.V. | Echelle telescopique |
CN111448360B (zh) | 2017-11-08 | 2021-08-10 | 科尔分配股份有限公司 | 用于伸缩梯子的锁定组件 |
SE544747C2 (en) * | 2018-10-17 | 2022-11-01 | Telesteps Ab | A stabiliser system for a collapsible ladder |
US11795760B2 (en) | 2019-10-24 | 2023-10-24 | Core Distribution, Inc. | Ladder tripod assembly and system |
WO2023101584A1 (fr) * | 2021-12-02 | 2023-06-08 | Telesteps Ab | Dispositif d'amortissement et bloc d'amortissement asymétrique conçu pour être agencé dans un dispositif d'amortissement destiné à une échelle pliable, échelle pliable et procédé d'agencement d'un dispositif d'amortissement dans une échelle pliable |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1712942A (en) | 1927-12-29 | 1929-05-14 | Hiram K Smith | Collapsible ladder |
EP0527766A1 (fr) | 1990-04-10 | 1993-02-24 | Safescape Ltd | Echelle escamotable. |
GB2263932A (en) | 1992-02-01 | 1993-08-11 | Telesteps Limited | Loft ladder. |
US5738186A (en) | 1994-03-01 | 1998-04-14 | Foxdale Developments Limited | Extensible ladder |
US5743355A (en) | 1996-07-31 | 1998-04-28 | Mcdonnell; Charles A. | Retractable ladder |
US20020056795A1 (en) * | 2000-11-14 | 2002-05-16 | Campagnolo Srl | Clamp for fixing the seat post of a bicycle |
WO2004013445A1 (fr) | 2002-08-02 | 2004-02-12 | Core Distribution, Inc. | Echelle telescopique et procedes de fabrication associes |
EP1402143A1 (fr) | 2001-06-13 | 2004-03-31 | Telesteps AB | Echelle pliable |
WO2007079379A1 (fr) | 2005-12-30 | 2007-07-12 | Core Distribution, Inc. | Échelle ergonomique extensible/rétractable |
US20070209875A1 (en) * | 2006-03-10 | 2007-09-13 | Mua-Mei Chen | Securing device for extending ladder |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4574918A (en) * | 1982-01-21 | 1986-03-11 | Andral Corporation | Ladder locking mechanism |
US5645140A (en) * | 1995-05-08 | 1997-07-08 | Mouneimneh; Ghassoub A. | Self-supported collapsible ladder |
JPH10509224A (ja) * | 1995-09-19 | 1998-09-08 | ケンドール, ジェラルド, アール. | 折りたたみ梯子 |
GB2436584B (en) * | 2006-03-30 | 2011-08-31 | Norman William Liefke | An extension ladder with improved mechanism |
-
2008
- 2008-01-30 EP EP15188391.5A patent/EP2998501B8/fr active Active
- 2008-01-30 EP EP08705071.2A patent/EP2215323B1/fr active Active
- 2008-01-30 CN CN2008801238043A patent/CN101918671B/zh active Active
- 2008-01-30 WO PCT/NL2008/000033 patent/WO2009057995A1/fr active Application Filing
- 2008-01-30 CN CN2011100659161A patent/CN102168521B/zh active Active
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1712942A (en) | 1927-12-29 | 1929-05-14 | Hiram K Smith | Collapsible ladder |
EP0527766A1 (fr) | 1990-04-10 | 1993-02-24 | Safescape Ltd | Echelle escamotable. |
GB2263932A (en) | 1992-02-01 | 1993-08-11 | Telesteps Limited | Loft ladder. |
US5738186A (en) | 1994-03-01 | 1998-04-14 | Foxdale Developments Limited | Extensible ladder |
US5743355A (en) | 1996-07-31 | 1998-04-28 | Mcdonnell; Charles A. | Retractable ladder |
US20020056795A1 (en) * | 2000-11-14 | 2002-05-16 | Campagnolo Srl | Clamp for fixing the seat post of a bicycle |
EP1402143A1 (fr) | 2001-06-13 | 2004-03-31 | Telesteps AB | Echelle pliable |
EP1516999A2 (fr) * | 2001-06-13 | 2005-03-23 | Telesteps AB | Echelle pliable |
WO2004013445A1 (fr) | 2002-08-02 | 2004-02-12 | Core Distribution, Inc. | Echelle telescopique et procedes de fabrication associes |
WO2007079379A1 (fr) | 2005-12-30 | 2007-07-12 | Core Distribution, Inc. | Échelle ergonomique extensible/rétractable |
US20070209875A1 (en) * | 2006-03-10 | 2007-09-13 | Mua-Mei Chen | Securing device for extending ladder |
Also Published As
Publication number | Publication date |
---|---|
EP2215323B1 (fr) | 2015-10-07 |
EP2998501B8 (fr) | 2018-12-26 |
WO2009057995A1 (fr) | 2009-05-07 |
CN101918671A (zh) | 2010-12-15 |
EP2998501B1 (fr) | 2018-10-10 |
CN102168521A (zh) | 2011-08-31 |
EP2215323A1 (fr) | 2010-08-11 |
CN102168521B (zh) | 2013-07-31 |
CN101918671B (zh) | 2012-11-07 |
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