EP0310884A1 - Folding ladder - Google Patents
Folding ladder Download PDFInfo
- Publication number
- EP0310884A1 EP0310884A1 EP88115651A EP88115651A EP0310884A1 EP 0310884 A1 EP0310884 A1 EP 0310884A1 EP 88115651 A EP88115651 A EP 88115651A EP 88115651 A EP88115651 A EP 88115651A EP 0310884 A1 EP0310884 A1 EP 0310884A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ladder
- rung
- foldable
- rungs
- point
- 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
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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
- E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
-
- 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
- E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
- E06C1/383—Foldable ladders in which the longitudinal members are brought together on folding
- E06C1/3835—Foldable ladders in which the longitudinal members are brought together on folding having collapsible steps comprising a hinge in their central part
-
- 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
- E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
- E06C1/383—Foldable ladders in which the longitudinal members are brought together on folding
Definitions
- the invention relates to a foldable vertical ladder with foldable rungs, which have a 90 ° pivot point in the central region, the rungs also being installed rotatable by 90 ° in the Seigholmen.
- German Offenlegungsschriften 29 23 397 and 33 2o 519 are to be mentioned.
- DE-OS 29 23 397 relates to a folding ladder with two spars, to which rungs each consisting of two directly articulated parts are articulated, the different pivot axes being parallel to one another and perpendicular to the plane of the ladder, with a resistant, preferably tubular rod for Connection of the articulation points of the rung parts with each other, and with a support frame arranged under the bottom rung of the ladder, the support legs of which have a greater length than the rung parts and are articulated on the one hand on the spars and on the other hand, the tip of the support frame being arranged over the ends of the support legs is and forms a support for the lower end of the resilient rod when the conductor is fully spread apart, the pivot axes of the support legs of the support frame being arranged on the spars at locations that are stationary with respect to the spars, and that the pivot axis is in the region of the bend
- the two support legs can be moved relative to one another with respect to the resistant rod, the stop surface formed by the tip of the support frame itself
- DE-OS 33 2o 519 describes a folding ladder in which the ladder rungs are folded in the middle and are hinged to the ladder stiles. There is a central locking linkage that does not represent a slide rail and that is not slidably arranged in the spar.
- the present invention has for its object to provide such a folding ladder that allows a completely uniform buckling movement of the rungs, but at the same time there is no impairment of the climbing process.
- This object on which the present invention is based is achieved in the case of a folding ladder of the type mentioned in the introduction in that on the right and left of the rung webs a push rail connecting the rungs is installed inside the spars.
- a spacer roller for supporting the elongated rungs can be installed in the central joint, as in the end joints, whereby the step web can be formed in the middle of the rung so that the step webs abut each other and the pressure point is on the rung ends is supported.
- the risers are preferably U-shaped and the material thickness in connection with the likewise U-shaped crossbars is preferably held so that the overall stability corresponds to the standards on which ladders are based, the accuracy of safety being ensured by suitable fitting pieces.
- One of the main functions of the folding ladder according to the invention is to be easily transportable as a ladder on caravans, on the boat, in the house, since the folding ladder has the shape of a "rod" with a rectangular cross-section when folded.
- An aluminum alloy is preferably to be provided as material, the rivets are preferably made of chromium-nickel steel. Furthermore, the aluminum brings the desired corrosion resistance and the desired weight saving.
- a foldable step ladder 1 is required, which requires folding steps 3, each through a central joint, such as an end joint 9, 6 built into the side rails, in the particularity of the foldability.
- the rung movement 7, 8 is tied to the synchronism of the rung movement by riveting from rung to rung 3 by a movement push rail 2 on the right and left, the axis intersection with the push rail riveting point having to be precisely arranged.
- Figure 3 is the ladder in the working position in the extended rung position 18 in the central joint 4 by the spacer rollers 5 with the step edge 14 to the pressure point in the end position reinforcing in the interaction of the joints 9 installed at the end of the rungs in the spars firmly anchored at the end pressure point 7.
- the conductor in the rest position can be seen in FIG. 3/4 as a space-saving, cubically acting rod 17; here, at 2o, a locking lock or lockability is shown.
- 2 shows the push rail and 16 shows the rivetability from rung to rung.
- the position of use of the foldable ladder in the area of the bottom rung is anchored in the bracing linkage 21 via the central holder 27, at 23 the linkage engages in a supporting manner in the base of the ladder foot, whereby the counter-strut makes the ladder stable.
- the center pivot point of the rung is stabilized by means of a spacer roller 5 which, by means of the locking core pin 30, absorbs all rotary movements freely up to the end point position 28, the transverse bolt 27 ensuring the final engagement.
- Figure 7 shows the almost cubic closed section seen from above, at 24 the compact part with the central support roller 5 is used for stabilization, below 25 are the movable slide rails, which make it possible to slide into the counter rails using the spacers , the center of the round is the final locking, as is the U-spars pushed against each other from FIG. 6 to FIG.
- FIGS. 8 to 17 show further exemplary embodiments of the subject matter of the invention.
- Figure 18 and Figure 19 show the bracket linkage 21 in a further preferred embodiment.
- the clamping linkage 21 has at its ends arc-shaped claws 50 which grip around the axle roller 5 in the unfolded state.
- the latching lugs 51 of each clamping rod part 21 engage in the recess 22 of the axle roller 5.
- the axle roller 5 is guided so that the recess 52 is exactly over the locking lugs 51 in the unfolded state.
- the size of the recess 52 is smaller than the outer dimensions of the latching lugs 51, so that when the conductors are folded out, the latching lugs 51 must be pressed into the recess 42 and thus a firm connection is created.
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- Ladders (AREA)
- Steps, Ramps, And Handrails (AREA)
Abstract
Description
Die Erfindung betrifft eine zusammenfaltbare Steigleiter mit einknickbaren Sprossen, die im Mittelbereich einen 9o°-Drehpunkt aufweisen, wobei die Sprossen in den Seigholmen ebenfalls um 9o° drehbar eingebaut sind.The invention relates to a foldable vertical ladder with foldable rungs, which have a 90 ° pivot point in the central region, the rungs also being installed rotatable by 90 ° in the Seigholmen.
Zum nächstkommenden Stand der Technik sind die deutschen Offenlegungsschriften 29 23 397 und 33 2o 519 zu nennen.As for the closest prior art, German Offenlegungsschriften 29 23 397 and 33 2o 519 are to be mentioned.
Die DE-OS 29 23 397 betrifft eine Faltleiter mit zwei Holmen, an denen je aus zwei direkt aneinander angelenkten Teilen bestehende Sprossen angelenkt sind, wobei die verschiedenen Schwenkachsen untereinander parallel und senkrecht zur Ebene der Leiter liegen, mit einer widerstandsfähigen, vorzugsweise rohrförmigen Stange zur Verbindung der Anlenkungsstellen der Sprossenteile untereinander, und mit einem unter der untersten Sprosse der Leiter angeordneten Stützgestell, dessen Stützschenkel eine größere Länge aufweisen als die Sprossenteile und einerseits an den Holmen sowie andererseits aneinander angelenkt sind, wobei die Spitze des Stützgestelles über den Enden der Stützschenkel angeordnet ist und ein Auflager für das untere Ende der widerstandsfähigen Stange bei voll auseinandergespreizter Leiter bildet, wobei die Schwenkachsen der Stützschenkel des Stützgestelles an den Holmen an bezüglich der Holme ortsfesten Stellen angeordnet sind, und daß die Schwenkachse im Bereich der Anlenkung der beiden Stützschenkel aneinander gegenüber der widerstandsfähigen Stange beweglich ist, wobei die durch die Spitze des Stützgestelles gebildete Anschlagfläche selbst wiederum gegenüber der widerstandsfähigen Stange beweglich gehalten ist.DE-OS 29 23 397 relates to a folding ladder with two spars, to which rungs each consisting of two directly articulated parts are articulated, the different pivot axes being parallel to one another and perpendicular to the plane of the ladder, with a resistant, preferably tubular rod for Connection of the articulation points of the rung parts with each other, and with a support frame arranged under the bottom rung of the ladder, the support legs of which have a greater length than the rung parts and are articulated on the one hand on the spars and on the other hand, the tip of the support frame being arranged over the ends of the support legs is and forms a support for the lower end of the resilient rod when the conductor is fully spread apart, the pivot axes of the support legs of the support frame being arranged on the spars at locations that are stationary with respect to the spars, and that the pivot axis is in the region of the bend The two support legs can be moved relative to one another with respect to the resistant rod, the stop surface formed by the tip of the support frame itself being held movable with respect to the resistant rod.
Es ist also bei dieser Faltleiter des Standes der Technik eine zentrale Spreitzstange, die keine Schubschiene ist, und die nicht innerhalb des Holms geschoben wird, angeordnet.In this prior art folding ladder, a central spreader bar, which is not a push rail, and which is not pushed inside the spar, is arranged.
Die DE-OS 33 2o 519 beschreibt eine Faltleiter, bei der die Leitersprossen in der Mitte gefaltet werden und an die Leiterholme angelenkt sind. Dabei ist ein mittiges Schließgestänge vorhanden, das keine Schubschiene darstellt und das nicht im Holm verschieblich angeordnet ist.DE-OS 33 2o 519 describes a folding ladder in which the ladder rungs are folded in the middle and are hinged to the ladder stiles. There is a central locking linkage that does not represent a slide rail and that is not slidably arranged in the spar.
Es hat sich herausgestellt, daß die Faltleitern des Standes der Technik nicht in allen Fällen die Bedürfnisse der Praxis befriedigen können. Dies gilt insbesondere für den Vollzug einer völlig gleichmäßigen Einknickbewegung.It has been found that the folding ladders of the prior art cannot satisfy the needs of practice in all cases. This applies in particular to the implementation of a completely even buckling movement.
Demgegenüber liegt vorliegender Erfindung die Aufgabe zugrunde, eine solche Faltleiter zu schaffen, die eine völlig gleichmäßige Einknickbewegung der Sprossen ermöglicht, wobei aber gleichzeitig keine Beeinträchtigung des Steigvorgangs stattfindet.In contrast, the present invention has for its object to provide such a folding ladder that allows a completely uniform buckling movement of the rungs, but at the same time there is no impairment of the climbing process.
Diese vorliegender Erfindung zugrunde liegende Aufgabe, wird bei einer Faltleiter der eingangs genannten Gattung dadurch gelöst, daß rechts und links der Sprossenstege jeweils eine die Sprossen verbindende Schubschiene innerhalb der Holme eingebaut ist.This object on which the present invention is based is achieved in the case of a folding ladder of the type mentioned in the introduction in that on the right and left of the rung webs a push rail connecting the rungs is installed inside the spars.
Bevorzugte Ausführungsformen sind Gegenstände der beiliegenden Unteransprüche.Preferred embodiments are the subject of the accompanying subclaims.
Zu Belastungspunkt bei den Sprossen kann in dem Mittelgelenk, wie in den Endgelenken, je eine Distanzrolle zum Abstützten der gestrecken Sprossen eingebaut sein, wobei in der Sprossenmitte der Trittsteg von beiden Seiten so ausgebildet sein kann, daß die Trittstege stumpf gegeneinander anliegen und der Druckpunkt an den Sprossenenden unterstützt wird.At the point of loading of the rungs, a spacer roller for supporting the elongated rungs can be installed in the central joint, as in the end joints, whereby the step web can be formed in the middle of the rung so that the step webs abut each other and the pressure point is on the rung ends is supported.
Die Steigschienen sind vorzugsweise U-förmig und in der Materialstärke in Verbindung mit den ebenfalls U-förmigen Sprossenstegen vorzugsweise so gehalten, daß die Gesamtstabilität den für Leitern zugrunde gelegten Normen entspricht, wobei durch entsprechende Paß-Stücke die Präzision der Sicherheit gewährleistet ist.The risers are preferably U-shaped and the material thickness in connection with the likewise U-shaped crossbars is preferably held so that the overall stability corresponds to the standards on which ladders are based, the accuracy of safety being ensured by suitable fitting pieces.
Eine der Hauptfunktionen der erfindungsgemäßen Faltleiter besteht darin, als auf engstem Raum unterbringbare Leiter an Wohnwagen, auf dem Boot, im Haus auch gut transportabel zu sein, da die Faltleiter im zusammengefalteten Zustand quasi die Form einer "Stange" mit rechteckigem Querschnitt aufweist.One of the main functions of the folding ladder according to the invention is to be easily transportable as a ladder on caravans, on the boat, in the house, since the folding ladder has the shape of a "rod" with a rectangular cross-section when folded.
Als Material ist vorzugsweise eine Aluminiumlegierung vorzusehen, die Nieten bestehen vorzugsweise aus Chromnickelstahl. Ferner bringt das Aluminium die gewünschte Korrosionsfestigkeit und die gewünschte Gewichtseinsparung.An aluminum alloy is preferably to be provided as material, the rivets are preferably made of chromium-nickel steel. Furthermore, the aluminum brings the desired corrosion resistance and the desired weight saving.
Das Wesen der vorliegenden Erfindung wird anhand der beiliegenden Figuren 1 bis 17, die bevorzugte Ausführungsformen darstellen, weiterhin erläutert. Es zeigen:
- Figur 1 ein Leiterausschnitt in Gebrauchsstellung in frontaler Ansicht,
Figur 2 eine leicht eingeknickte zum Zusammenfalten angelegte Stellung der Leiter,- Figur 3 eine in Ruhestellung zusammengelegte Leiter,
- Figur 4 eine Verbindungs-Schubschiene zur Sprossenverbindung,
Figur 5 den Leiterbodenendabschnitt mit Verklammerungsgestänge,Figur 6 die untere gestreckte Trittsprosse,- Figur 7 die zusammengeklappte Leiter als Stab im Schnitt von oben gesehen und
- Figuren 8-17 zeigen weitere Einzelheiten.
Figur 18 eine Vorderansicht des Einklammerungsgestänges- Figur 19 eine Ansicht aus der in
Figur 18 angedeuteten Richtung A.
- FIG. 1 shows a ladder cutout in the use position in a frontal view,
- FIG. 2 shows a slightly bent position of the ladder for folding,
- FIG. 3 shows a ladder folded in the rest position,
- FIG. 4 shows a connecting slide rail for connecting the rungs,
- FIG. 5 shows the conductor base end section with clamping rods,
- FIG. 6 the lower straight step,
- Figure 7 seen the folded ladder as a rod in section from above and
- Figures 8-17 show further details.
- Figure 18 is a front view of the bracket linkage
- FIG. 19 is a view from the direction A indicated in FIG. 18.
Nach Figur 1 ist eine zusammenfaltbare Steigleiter 1 , die durch einknickbare Trittsprossen 3 durch je ein Mittelgelenk, wie in den Seitenholmen eingebautes Endgelenk 9 , 6 in der Besonderheit der Faltbarkeit verlangt.According to FIG. 1, a foldable step ladder 1 is required, which requires folding steps 3, each through a central joint, such as an
In Figur 2 ist von Sprosse zu Sprosse 3 durch eine Bewegungsschubschiene 2 rechts und links die Einknickbewegung 7 , 8 durch die Vernietung an den Gleichlauf der Sprossenbewegung gebunden, wobei der Achsschnittpunkt zum Schubschienennietpunkt präzise veranlagt sein muß.In Figure 2, the
Figur 3 ist die Leiter in Arbeitsstellung bei gestreckter Sprossenstellung 18 im Mittelgelenk 4 durch die Distanzrollen 5 mit der Stufenstoßkante 14 zum Druckpunkt in der Endstellung verstärkend im Zusammenwirken der am Ende der Sprossen in den Holmen eingebauten Gelenke 9 beim Enddruckpunkt 7 fest sich verankernd eingebaut.Figure 3 is the ladder in the working position in the extended
Unter Figur 3/4 ist die Leiter in der Ruhestellung als raumsparender kubisch wirkender Stab 17 erkennbar, hier ist bei 2o eine verschließende Arretierung oder auch Abschließbarkeit aufgezeigt. In 2 ist die Schubschiene, bei 16 die Vernietbarkeit von Sprosse zu Sprosse aufgezeigt.The conductor in the rest position can be seen in FIG. 3/4 as a space-saving, cubically acting
Nach Figur 5 ist die Gebrauchsstellung der faltbaren Leiter im Bereich der untersten Sprosse das Einklammerungsgestänge 21 über die Mittelhalterung 27 verankert, bei 23 sich das Gestänge im Leiterfußsockel abstützend einrastet, womit die Gegenstrebung die Leiter standfest macht. Der Mitteldrehpunkt der Sprosse stabilisiert sich mittels Distanzrolle 5 , die durch den Arretierungskernstift 30 allen Drehbewegungen freistehend bis zur Endpunktstellung 28 auffängt, wobei der Querbolzen 27 die letztendliche Einrastung gewährleistet.According to FIG. 5, the position of use of the foldable ladder in the area of the bottom rung is anchored in the
In Figur 6 sind von oben gesehen bei 26 die zwischen den U-förmigen Holmen distanzgebenden Distanzscheiben eingebaut, bei 25 sind die Sprossen-Schubschienen eingebaut, die dazu dienen, die Halbsprossen beidseitig gleichlaufend zu heben und zu senken, wobei in der gestreckten Form die Schienen zum Abstützen aufsitzen, bei 12 , 13 technisch aufgezeigt.In Figure 6, seen from above, at 26, the spacers spacing the distance between the U-shaped spars are installed, at 25 the rung push rails are installed, which serve to raise and lower the half rungs in the same direction on both sides, with the rails in the stretched shape sit on for support, technically shown at 12, 13.
In Figur 7 zeigt die fast kubisch im Ausschnitt von oben gesehen geschlossene Leiter, bei 24 ist der kompakte Teil mit det Mittelstützrolle 5 veranlagt, die der Stabilisierung dient, unter 25 sind die beweglichen Schubschienen, die mittels der Distanzscheiben das Eingleiten in die Gegenholme möglich machen, der Rundmittelpunkt ist die Endarretierung, wie auch die gegeneinander geschobenen U-Holme von Figur 6 zu Fig. 7 gut sichtbar konstruiert ist.In Figure 7 shows the almost cubic closed section seen from above, at 24 the compact part with the
Die Figuren 8 bis 17 zeigen weitere beispielhafte Ausführungsformen des Erfindungsgegenstandes.FIGS. 8 to 17 show further exemplary embodiments of the subject matter of the invention.
In Figur 8 und 9 bei 31 die Steigholme, in 32 die einknickbaren Trittsprossen, bei 33 sind die versetzt angebrachten Schubschienen, in 34 sind die präzise von Sprosse zu Sprosse fixierten Gelenknieten für die gleichmäßige Schubbewegung der Sprossen veranlagt, bei 35 sind die der Schubschiene angepaßten Distanzringe an der von 31 und 32 verbindende Achse 39 wie auch bei 36 Distanzringe für den Sprossenversatz angebracht sind, unter 37 ist eine tragende Distanzrolle, bei 38 ist die Sprossen verbindende Achse eingesetzt, unter 39 sind die Sprossen mit den Steigholmen mittels Achse 9 mit den Distanzrollen in vorbedachte überlaschende Position verankert, bei 4o die Trittsprossen verbundenen Schubschienen die über den vorgesehenen 9o°-Drehmoment punktuell den Gleichlauf in die Auf- und Abbewegung gewährleisten, wobei im Endschließpunkt die Schubschienen gegenseitig wie in Figur 1o bei 33 ersichtlich beidseitig in die Steigholme kurz eintauchen, unter 41 ist bei der gestreckten Sprosse eine Arretierung veranlagt, damit ist auch die Stabilisierung der stabförmigen Leiter als geschlosene Leiter aufgezeigt.In Figures 8 and 9 at 31 the risers, in 32 the foldable step rungs, at 33 are the offset slide rails, in 34 the articulated rivets fixed precisely from rung to rung are designed for the uniform pushing movement of the rungs, at 35 the spacer rings adapted to the push rail are attached to the
Figur 18 und Figur 19 zeigen das Einklammerungsgestänge 21 in einer weiteren bevorzugten Ausführungsform.Figure 18 and Figure 19 show the
Das Einklammerungsgestänge 21 weist an seinen Enden bogenförmige Klauen 50 auf, die die Achsrolle 5 im ausgeklappten Zustand umgreifen. Dabei greifen die Einrastnasen 51 jedes Einklammerungsgestängeteils 21 in die Aussparung 22 der Achsrolle 5 ein.
Die Achsrolle 5 wird dabei so geführt, daß die Aussparung 52 im ausgeklappten Zustand exakt über den Einrastnasen 51 besteht.The
The
Die Größe der Aussparung 52 ist dabei geringer wie die Außenmaße der Einrastnasen 51, so daß beim Ausklappen der Leiter die Einrastnasen 51 in die Aussparung 42 eingedrückt werden müssen und somit eine festhaltende Verbindung entsteht.The size of the
Claims (8)
dadurch gekennzeichnet,
daß rechts und links der Sprossenstege (3) jeweils eine die Sprossen verbindende Schubschiene (2) innerhalb der Holme (Steigholme) (21) eingebaut ist.1. Foldable ladder with foldable rungs, which have a 9o ° pivot point in the central area, the rungs in the risers also being installed rotatable by 9o °,
characterized,
that on the right and left of the rung webs (3) a push rail (2) connecting the rungs is installed inside the uprights (uprights) (21).
dadurch gekennzeichnet,
daß die Schubschienen im Abstand von der Sprossen-Endachsniete in jeder Sprosse eingenietet sind.2. Foldable ladder according to claim 1,
characterized,
that the push rails are riveted in each rung at a distance from the rung end axle rivet.
Die unter (26) veranlagten Distanzscheiben ergeben die Grundlage dazu, die sprossenbewegenden Schubschienen (25) den Drehbewegungsbereich raumsparend zu gewährleisten.6. Foldable ladder according to claim 1 to 5, characterized in that the foldability of the ladder from rung to rung through the slide rails (21) at (25) in (24) in the folded design the slide rails (25) predisposed to the right and left in the Slide the U-rail uprights seamlessly.
The spacers provided under (26) provide the basis for ensuring that the rung-moving push rails (25) save space for the rotary movement range.
Bei (24) zeigt sich die faltbare Leiter in der zum Stab geschlossenen Steigleiter.7. Foldable ladder according to claim 6 and 7, characterized in that the anchoring for brackets (21) in the ladder base (31) through dan carrying axle passage (32) on the ladder stiles Bottom end point (23) is designed as a floor holding block, the three-point function of the clamping linkage (21) via (23), (27) and (22) shows the functions of stabilizing these foldable conductors.
At (24) the foldable ladder is shown in the ladder closed to the rod.
dadurch gekennzeichnet,
daß das Einklammerungsgestänge (21) an seinen Enden bogenförmige Klauen (50) aufweist und an jedem Einklammerungsgestängeteil (21) eine Einrastnase (51) angeordnet ist, die in die Aussparung (52) der Achsrolle (5) im ausgeklappten Zustand eingedrückt wird.8. Foldable ladder according to the preceding claims,
characterized,
that the bracket linkage (21) has arcuate claws (50) at its ends and a latching lug (51) is arranged on each bracket linkage part (21), which is pressed into the recess (52) of the axle roller (5) in the unfolded state.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT88115651T ATE75293T1 (en) | 1987-10-06 | 1988-09-23 | FOLDABLE LADDERS. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19873733702 DE3733702A1 (en) | 1987-10-06 | 1987-10-06 | FOLDABLE LIFTING LADDER |
DE3733702 | 1987-10-06 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0310884A1 true EP0310884A1 (en) | 1989-04-12 |
EP0310884B1 EP0310884B1 (en) | 1992-04-22 |
Family
ID=6337688
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88115651A Expired - Lifetime EP0310884B1 (en) | 1987-10-06 | 1988-09-23 | Folding ladder |
Country Status (9)
Country | Link |
---|---|
US (1) | US4842099A (en) |
EP (1) | EP0310884B1 (en) |
JP (1) | JPH01239287A (en) |
KR (1) | KR890006949A (en) |
AT (1) | ATE75293T1 (en) |
AU (1) | AU615480B2 (en) |
CA (1) | CA1296688C (en) |
DE (2) | DE3733702A1 (en) |
ES (1) | ES2032918T3 (en) |
Cited By (1)
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FR2928393A1 (en) * | 2008-03-07 | 2009-09-11 | Larbaletier Soc Par Actions Si | Observation device e.g. observation tower, for observing fauna, in countryside, has raising structure i.e. base, formed with joints that fold base by connecting axes of stands of base, and platform folded for inserting on or in base |
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US5158151A (en) * | 1992-01-21 | 1992-10-27 | Chang Wan Li | Bidirectionally foldable step ladder |
US5195610A (en) * | 1992-05-04 | 1993-03-23 | Wan Li Chang | Bidirectionally foldable step ladder |
CH686317A5 (en) * | 1992-05-08 | 1996-02-29 | Wan Li Chang | Locking device for bidirectionally foldable step ladders |
AU667980B2 (en) * | 1992-11-26 | 1996-04-18 | Michael Mulawa | Toy surfing device |
DE9406506U1 (en) * | 1994-04-19 | 1995-08-17 | Kunz, Markus, 66646 Marpingen | Stairs, especially attic stairs |
US6536558B2 (en) | 2001-02-16 | 2003-03-25 | Harold E. Price | Folding ladder |
CN112572562B (en) * | 2020-12-05 | 2021-11-23 | 乐山职业技术学院 | Book transfer device |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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GB191010778A (en) * | 1910-05-02 | 1910-09-15 | Flora Williams Smith | Improvements in Foldable Ladders. |
US1371125A (en) * | 1918-01-05 | 1921-03-08 | Jr Herman Frank Speckman | Folding ladder |
FR1139461A (en) * | 1955-12-02 | 1957-07-01 | articulated ladder | |
FR1247207A (en) * | 1959-10-21 | 1960-11-25 | ladder with folding elements on top of each other | |
US2981364A (en) * | 1959-07-13 | 1961-04-25 | Webber Jack | Folding ladder |
DE2923397A1 (en) * | 1978-06-09 | 1979-12-20 | Gerard Stoltz | FOLDING LADDER |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US610284A (en) * | 1898-09-06 | schubert | ||
US958732A (en) * | 1908-03-06 | 1910-05-24 | Dennis Novelty Ladder Company | Ladder. |
US2670120A (en) * | 1949-05-16 | 1954-02-23 | Sanguineti Emanuele | Collapsible ladder, double ladder, and stepladder |
US3084760A (en) * | 1960-01-18 | 1963-04-09 | Lamberti Battista | Stepladder with folding elements |
AT239066B (en) * | 1963-05-16 | 1965-03-10 | Johann Tretina | Ladder that can be used as a leaning or step ladder |
FR1403008A (en) * | 1964-04-27 | 1965-06-18 | Improvements to ladders and similar portable stairs | |
DE3320519A1 (en) * | 1983-06-07 | 1984-12-13 | Karl 4400 Münster Kemper | Folding ladder |
US4560030A (en) * | 1984-05-04 | 1985-12-24 | Metarplastic S.P.A. | Folding ladder |
IT8552842V0 (en) * | 1985-01-14 | 1985-01-14 | Pro Cord Srl | THREE-POST FOLDING PADLOCK |
-
1987
- 1987-10-06 DE DE19873733702 patent/DE3733702A1/en active Granted
- 1987-12-10 US US07/131,628 patent/US4842099A/en not_active Expired - Fee Related
-
1988
- 1988-09-23 AT AT88115651T patent/ATE75293T1/en active
- 1988-09-23 EP EP88115651A patent/EP0310884B1/en not_active Expired - Lifetime
- 1988-09-23 ES ES198888115651T patent/ES2032918T3/en not_active Expired - Lifetime
- 1988-09-23 DE DE8888115651T patent/DE3870386D1/en not_active Expired - Fee Related
- 1988-10-04 AU AU23406/88A patent/AU615480B2/en not_active Ceased
- 1988-10-05 CA CA000579374A patent/CA1296688C/en not_active Expired - Lifetime
- 1988-10-06 KR KR1019880013050A patent/KR890006949A/en not_active Application Discontinuation
- 1988-10-06 JP JP63251022A patent/JPH01239287A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB191010778A (en) * | 1910-05-02 | 1910-09-15 | Flora Williams Smith | Improvements in Foldable Ladders. |
US1371125A (en) * | 1918-01-05 | 1921-03-08 | Jr Herman Frank Speckman | Folding ladder |
FR1139461A (en) * | 1955-12-02 | 1957-07-01 | articulated ladder | |
US2981364A (en) * | 1959-07-13 | 1961-04-25 | Webber Jack | Folding ladder |
FR1247207A (en) * | 1959-10-21 | 1960-11-25 | ladder with folding elements on top of each other | |
DE2923397A1 (en) * | 1978-06-09 | 1979-12-20 | Gerard Stoltz | FOLDING LADDER |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2928393A1 (en) * | 2008-03-07 | 2009-09-11 | Larbaletier Soc Par Actions Si | Observation device e.g. observation tower, for observing fauna, in countryside, has raising structure i.e. base, formed with joints that fold base by connecting axes of stands of base, and platform folded for inserting on or in base |
Also Published As
Publication number | Publication date |
---|---|
JPH01239287A (en) | 1989-09-25 |
ES2032918T3 (en) | 1993-03-01 |
ATE75293T1 (en) | 1992-05-15 |
US4842099A (en) | 1989-06-27 |
AU615480B2 (en) | 1991-10-03 |
AU2340688A (en) | 1989-04-06 |
DE3733702C2 (en) | 1990-10-31 |
DE3733702A1 (en) | 1989-05-03 |
EP0310884B1 (en) | 1992-04-22 |
KR890006949A (en) | 1989-06-17 |
CA1296688C (en) | 1992-03-03 |
DE3870386D1 (en) | 1992-05-27 |
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