EP0508274A1 - Stair element for an overhanging stair with a central stringer - Google Patents

Stair element for an overhanging stair with a central stringer Download PDF

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Publication number
EP0508274A1
EP0508274A1 EP92105511A EP92105511A EP0508274A1 EP 0508274 A1 EP0508274 A1 EP 0508274A1 EP 92105511 A EP92105511 A EP 92105511A EP 92105511 A EP92105511 A EP 92105511A EP 0508274 A1 EP0508274 A1 EP 0508274A1
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EP
European Patent Office
Prior art keywords
stair
wall part
cylindrical wall
stair element
wall
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EP92105511A
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German (de)
French (fr)
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EP0508274B1 (en
Inventor
Günter Holzkämpfer
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/02—Stairways; Layouts thereof
    • E04F11/022—Stairways; Layouts thereof characterised by the supporting structure
    • E04F11/025—Stairways having stringers
    • E04F11/028—Stairways having stringers having a central stringer
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/02—Stairways; Layouts thereof
    • E04F11/022—Stairways; Layouts thereof characterised by the supporting structure
    • E04F11/035—Stairways consisting of a plurality of assembled modular parts without further support

Definitions

  • the invention relates to a stair element for a cantilevered staircase with a central spar according to the preamble of claim 1.
  • a stair element of the type mentioned is known.
  • the stair element has an upper and at the other end a lower horizontal ring surface at each end.
  • a shaft with an external thread projects within the upper ring surface and immediately after it. When assembled, the shaft protrudes through the opening within the lower ring surface of the adjacent stair element.
  • a threaded sleeve can be screwed onto the threaded shaft, which engages at the edge of the opening within the lower ring surface.
  • the external thread of the shaft must be cut in a separate operation, and the threaded sleeve must be manufactured separately.
  • the assembly of the stairs requires specialist personnel and special tools.
  • the object of the present invention is to design a stair element of the type mentioned at the outset in such a way that the manufacture is simpler and cheaper the assembly is easier and allows you to build it yourself without special knowledge and tools.
  • the staircase element according to the invention is cast from spheroidal cast iron in one operation; the provision of a thread on the stair element is not necessary, so that the stair element can be produced very inexpensively. If desired, however, a thread can also be provided.
  • a thread can also be provided.
  • To connect two adjacent stair elements only one commercially available screw bolt is required for each element, which is tightened with a wrench, also preferably a torque wrench, which is also commercially available. This simplifies the assembly of the stairs, so that it is also possible to manufacture the stairs yourself.
  • the inventive design enables very low processing costs, so that the assembly of the stairs can still be done inexpensively even with increasing labor costs. Because of the simple self-assembly, the staircase can be made accessible to a wide range of consumers through hardware stores and hardware stores.
  • connection points of the stair elements a particularly high stability because the conical design of the walls derive the high forces that occur when the screw bolts are tightened outwards into the area of the wall of the stair elements.
  • the drawing shows a stair element 2 consisting of a cast hollow body made of nodular cast iron.
  • the stair element has a first cylindrical wall part 4 arranged on the underside of the tread plate and a second cylindrical wall part 6 which is arranged in front of the tread plate 8.
  • the wall parts 4 and 6 are connected to one another by an intermediate piece 10, which has a closed, essentially semicircular lower wall 12 and a flat upper wall part 14, the surface of which is flush with the surfaces of lateral flanges 16, 18 which extend from the upper part of the first cylindrical wall part 4 and extend to a lesser extent from the intermediate piece 10 and serve to place and fasten the step plate 8.
  • the first cylindrical wall part 4 has a horizontal, conically upwardly extending inner wall 20 with a central bore 22.
  • a cylindrical projection 24 adjoins this inner wall 20 at the bottom.
  • the conical inner wall 20 has an annular shoulder 26 at the transition to the neck 24.
  • the second cylindrical wall part 6 has a cylindrical shaft 28 which projects upwards above the flat upper wall part 14 and whose free end is closed by a wall 30 in which a central bore 32 is formed.
  • This wall 30 can be different than shown also be complementary conical to the conical design of the inner wall 20, as indicated by the broken line in FIG. 1, cf. Have reference numeral 30 'and a central bore 32'.
  • the inside diameter of the cylindrical extension 24 is essentially equal to the outside diameter of the cylindrical shaft 28.
  • Spacers 36 can be used between the stair elements to be connected for height compensation and for setting any desired step height, cf. Fig. 1.
  • the bores 32 and 32 ' can be designed as threaded bores into which the screw bolt 34 can be screwed for connecting two stair elements.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Steps, Ramps, And Handrails (AREA)
  • Ladders (AREA)

Abstract

A stair element for an overhanging stair has a central stringer which consists of several stair elements to which one tread each is fastened. The stair elements are designed as hollow bodies which each have a first wall part arranged below the tread and a second wall part arranged in front of the tread. To simplify the manufacture and assembly of the stair elements and in particular also to enable the stair to be self-built, the first wall part (4) has a horizontal inner wall (20) and an adjoining extension (24), the inside diameter of which is approximately the same as the outside diameter of the second wall part, likewise provided with a horizontal inner wall (30), and with which the first wall part (4) of a stair element (2') can be put onto the second wall part (6) of the adjacent stair element (2). The two inner walls (20, 30) can be screwed to one another by a bolt (34) to connect two adjacent stair elements. <IMAGE>

Description

Die Erfindung betrifft ein Treppenelement für eine freitragende Treppe mit einem Mittelholm gemaß Oberbegriff des Anspruchs 1.The invention relates to a stair element for a cantilevered staircase with a central spar according to the preamble of claim 1.

Durch die DE-PS 28 13 199 ist ein Treppenelement der genannten Art bekannt. Das Treppenelement weist jeweils an einem Ende eine obere und am anderen Ende eine untere horizontale Ringfläche auf. Innerhalb der oberen Ringfläche und unmittelbar daran anschließend springt ein Schaft mit einem Außengewinde vor. Im montierten Zustand ragt der Schaft durch die öffnung innerhalb der unteren Ringfläche des benachbarten Treppenelementes. Zur festen Verbindung benachbarter Treppenelemente ist auf den Gewindeschaft eine Gewindemuffe aufschraubbar, die am Rand der öffnung innerhalb der unteren Ringfläche angreift. Das Außengewinde des Schaftes muß in einem gesonderten Arbeitsgang geschnitten werden, und die Gewindemuffe muß gesondert hergestellt werden. Die Montage der Treppe erfordert Fachpersonal und Spezialwerkzeuge.From DE-PS 28 13 199 a stair element of the type mentioned is known. The stair element has an upper and at the other end a lower horizontal ring surface at each end. A shaft with an external thread projects within the upper ring surface and immediately after it. When assembled, the shaft protrudes through the opening within the lower ring surface of the adjacent stair element. For the firm connection of adjacent stair elements, a threaded sleeve can be screwed onto the threaded shaft, which engages at the edge of the opening within the lower ring surface. The external thread of the shaft must be cut in a separate operation, and the threaded sleeve must be manufactured separately. The assembly of the stairs requires specialist personnel and special tools.

Die Aufgabe der vorliegenden Erfindung besteht darin, ein Treppenelement der eingangs genannten Art so auszubilden, daß die Herstellung einfacher und preiswerter wird, die Montage einfacher ist und den Selbstbau ermöglicht, ohne daß Spezialkenntnisse und Spezialwerkzeuge notwendig sind.The object of the present invention is to design a stair element of the type mentioned at the outset in such a way that the manufacture is simpler and cheaper the assembly is easier and allows you to build it yourself without special knowledge and tools.

Diese Aufgabe wird durch die Ausbildung gemäß Kennzeichen des Anspruchs 1 gelöst.This object is achieved by the training according to the characterizing part of claim 1.

Das erfindungsgemäße Treppenelement wird in einem Arbeitsgang aus Sphäroguß gegossen; das Vorsehen eines Gewindes am Treppenelement ist nicht notwendig, so daß das Treppenelement sehr preiswert herstellbar ist. Falls gewünscht, kann jedoch auch ein Gewinde vorgesehen werden. Zum Verbinden zweier benachbarter Treppenelemente wird nur noch je Element ein im Handel erhältlicher Schraubenbolzen benötigt, der mit einem ebenfalls im Handel erhältlichen Schraubenschlüssel, vorzugsweise einem Drehmomentschlüssel, angezogen wird. Hierdurch wird die Montage der Treppe vereinfacht, so daß auch die Herstellung der Treppe im Selbstbau möglich ist. Die erfindungsgemäße Ausbildung ermöglicht sehr geringe Bearbeitungskosten, so daß die Montage der Treppe auch bei steigenden Lohnkosten immer noch preiswert erfolgen kann. Wegen der einfachen Selbstmontage kann die Treppe über den Baufachhandel und über Baumärkte einer breiten Verbraucherschicht zugänglich gemacht werden.The staircase element according to the invention is cast from spheroidal cast iron in one operation; the provision of a thread on the stair element is not necessary, so that the stair element can be produced very inexpensively. If desired, however, a thread can also be provided. To connect two adjacent stair elements, only one commercially available screw bolt is required for each element, which is tightened with a wrench, also preferably a torque wrench, which is also commercially available. This simplifies the assembly of the stairs, so that it is also possible to manufacture the stairs yourself. The inventive design enables very low processing costs, so that the assembly of the stairs can still be done inexpensively even with increasing labor costs. Because of the simple self-assembly, the staircase can be made accessible to a wide range of consumers through hardware stores and hardware stores.

Vorteilhafte und zweckmäßige Weiterbildungen der erfindungsgemäßen Aufgabenlösung sind in den Unteransprüchen gekennzeichnet.Advantageous and expedient developments of the task solution according to the invention are characterized in the dependent claims.

Durch die Weiterbildungen nach den Ansprüchen 2 und 4 erhalten die Verbindungsstellen der Treppenelemente eine besonders hohe Stabilität, weil die konische Ausbildung der Wände die beim Anziehen der Schraubbolzen auftretenden hohen Kräfte nach außen in den Bereich der Wandung der Treppenelemente ableiten.The further developments according to claims 2 and 4 give the connection points of the stair elements a particularly high stability because the conical design of the walls derive the high forces that occur when the screw bolts are tightened outwards into the area of the wall of the stair elements.

Die Erfindung soll nachfolgend anhand der beigefügten Zeichnung näher erläutert werden.The invention will be explained below with reference to the accompanying drawings.

Es zeigt:

Fig. 1
einen Vertikalschnitt durch ein Treppenelement, wobei die Verbindung mit einem benachbarten Treppenelement mit dargestellt ist,
Fig. 2
eine Aufsicht auf das Treppenelement nach Fig. 1 und
Fig. 3
einen Schnitt A-A durch das Treppenelement nach Fig. 2.
It shows:
Fig. 1
3 shows a vertical section through a stair element, the connection to an adjacent stair element being shown,
Fig. 2
a plan of the stair element according to Fig. 1 and
Fig. 3
2 shows a section AA through the stair element according to FIG. 2.

Die Zeichnung zeigt ein Treppenelement 2, bestehend aus einem gegossenen Hohlkörper aus Sphäroguß. Das Treppenelement weist ein erstes zylindrisches trittplattenunterseitig angeordnetes Wandteil 4 und ein zweites zylindrisches Wandteil 6 auf, das vor der Trittplatte 8 angeordnet ist. Die Wandteile 4 und 6 sind durch ein Zwischenstück 10 miteinander verbunden, das eine geschlossene, im wesentlichen halbrunde untere Wandung 12 und einen flachen oberen Wandungsteil 14 aufweist, dessen Oberfläche mit den Oberflächen von seitlichen Flanschen 16, 18 fluchtet, die sich von dem oberen Teil des ersten zylindrischen Wandungsteiles 4 und in geringerem Maß von dem Zwischenstück 10 aus erstrecken und zum Auflegen und Befestigen der Trittplatte 8 dienen.The drawing shows a stair element 2 consisting of a cast hollow body made of nodular cast iron. The stair element has a first cylindrical wall part 4 arranged on the underside of the tread plate and a second cylindrical wall part 6 which is arranged in front of the tread plate 8. The wall parts 4 and 6 are connected to one another by an intermediate piece 10, which has a closed, essentially semicircular lower wall 12 and a flat upper wall part 14, the surface of which is flush with the surfaces of lateral flanges 16, 18 which extend from the upper part of the first cylindrical wall part 4 and extend to a lesser extent from the intermediate piece 10 and serve to place and fasten the step plate 8.

Das erste zylindrische Wandungsteil 4 weist eine horizontale, konisch nach oben verlaufende Innenwand 20 mit einer zentralen Bohrung 22 auf. An diese Innenwand 20 schließt sich nach unten ein zylindrischer Anatz 24 an. Die konische Innenwand 20 weist am Übergang zum Ansatz 24 eine Ringschulter 26 auf.The first cylindrical wall part 4 has a horizontal, conically upwardly extending inner wall 20 with a central bore 22. A cylindrical projection 24 adjoins this inner wall 20 at the bottom. The conical inner wall 20 has an annular shoulder 26 at the transition to the neck 24.

Das zweite zylindrische Wandungsteil 6 weist einen nach oben über das flache obere Wandungsteil 14 emporragenden zylindrischen Schaft 28 auf, dessen freies Ende mit einer Wand 30 verschlossen ist, in der eine zentrale Bohrung 32 ausgebildet ist. Diese Wand 30 kann anders als dargestellt auch komplementär konisch zur konischen Ausbildung der Innenwand 20 ausgebildet sein, wie dies gestrichelt in der Fig. 1 angedeutet ist, vgl. Bezugszeichen 30' und eine zentrale Bohrung 32' aufweisen. Die konische Wand 30' bildet zusammen mit dem Schaftende eine Auflageringfläche 33 für die Ringschulter 26. Der Innendurchmesser des zylindrischen Ansatzes 24 ist im wesentlichen gleich dem Außendurchmesser des zylindrischen Schaftes 28.The second cylindrical wall part 6 has a cylindrical shaft 28 which projects upwards above the flat upper wall part 14 and whose free end is closed by a wall 30 in which a central bore 32 is formed. This wall 30 can be different than shown also be complementary conical to the conical design of the inner wall 20, as indicated by the broken line in FIG. 1, cf. Have reference numeral 30 'and a central bore 32'. The conical wall 30 ', together with the shaft end, forms a support ring surface 33 for the ring shoulder 26. The inside diameter of the cylindrical extension 24 is essentially equal to the outside diameter of the cylindrical shaft 28.

Zum Verbinden zweier Treppenelemente 2, 2', vgl. Fig. 1, wird das eine Treppenelement 2' mit dem zylindrischen Ansatz 24 zunächst auf den zylindrischen Schaft 28 des anderen Treppenelemtes 2 aufgesteckt, so daß die Ringschulter 26 auf dem Schaft 28 aufsitzt, wonach ein Schraubbolzen 34 durch beide fluchtenden Bohrungen 22 und 32 hindurchgesteckt und festgezogen wird, wie dies in der Fig. 1 dargestellt ist.For connecting two stair elements 2, 2 ', cf. Fig. 1, the one stair element 2 'with the cylindrical projection 24 is first plugged onto the cylindrical shaft 28 of the other stair element 2, so that the annular shoulder 26 sits on the shaft 28, after which a screw bolt 34 is inserted through both aligned bores 22 and 32 and tightened as shown in FIG. 1.

Zum Höhenausgleich und zur Einstellung jeder gewünschten Tritthöhe können Distanzringe 36 zwischen den zu verbindenden Treppenelementen eingesetzt werden, vgl. Fig. 1.Spacers 36 can be used between the stair elements to be connected for height compensation and for setting any desired step height, cf. Fig. 1.

Durch die konische Ausbildung der Wand 20 und/oder der Wand 30 werden die beim Anziehen der Schraubbolzen 34 auftretenden Kräfte nach außen in die Wandung der Treppenelemente geleitet.Due to the conical design of the wall 20 and / or the wall 30, the forces occurring when the screw bolts 34 are tightened are conducted outwards into the wall of the stair elements.

Anders als dargestellt, können die Bohrungen 32 und 32' als Gewindebohrungen ausgeführt sein, in die der Schraubbolzen 34 zum Verbinden zweier Treppenelemente einschraubbar ist.In contrast to the illustration, the bores 32 and 32 'can be designed as threaded bores into which the screw bolt 34 can be screwed for connecting two stair elements.

Claims (7)

Treppenelement für eine freitragende Treppe mit einem Mittelholm, der aus mehreren, miteinander verbundenen Treppenelementen besteht, an denen jeweils eine Trittplatte befestigt ist und die als Hohlkörper ausgebildet sind, die jeweils ein erstes in wesentliches zylindrisches, unter der Trittplatte angeordnetes Wandungsteil und ein zweites im wesentlichen zylindrisches, vor der Trittplatte angeordnetes Wandungsteil aufweisen, dadurch gekennzeichnet, daß das erste zylindrische Wandungsteil (4) des Treppenelementes (2) eine horizontale Innenwand (20) und einen sich daran nach unten anschließenden zylindrischen Ansatz (24) aufweist, dessen Innendurchmesser im wesentlichen gleich den Außendurchmesser des zweiten zylindrischen, ebenfalls mit einer horizontalen Innenwand (30) versehenen Wandungsteiles (6) ist und mit dem das erste zylindrische Wandungsteil (4) eines Treppenelementes (2') auf das zweite zylindrische Wandungsteil (6) des benachbarten Treppenelementes (2) aufsteckbar ist, und daß die beiden Innenwände (20, 30, 30') durch einen Schraubbolzen (34), der durch Bohrungen (22, 32, 32') der Innenwände (20, 30, 30') hindurchsteckbar ist, miteinander verschraubbar sind zum Verbinden zweier benachbarter Treppenelemente.Stair element for a cantilevered staircase with a central spar, which consists of several interconnected stair elements, to each of which a step plate is attached and which are designed as hollow bodies, each of which has a first essentially cylindrical wall part arranged under the step plate and a second essentially Have a cylindrical wall part arranged in front of the tread plate, characterized in that the first cylindrical wall part (4) of the stair element (2) has a horizontal inner wall (20) and a cylindrical extension (24) adjoining it downward, the inside diameter of which is essentially the same is the outer diameter of the second cylindrical wall part (6), which is also provided with a horizontal inner wall (30) and with which the first cylindrical wall part (4) of a stair element (2 ') onto the second cylindrical wall part (6) of the adjacent stair element (2) is attachable, and that the two inner walls (20, 30, 30 ') can be screwed together by a screw bolt (34) which can be pushed through bores (22, 32, 32') of the inner walls (20, 30, 30 ') to connect two neighboring stair elements. Treppenelement nach Anspruch 1, dadurch gekennzeichnet, daß die Innenwand (20) des ersten zylindrischen Wandungsteiles (4) eine nach oben konisch verlaufende, mit einer mittigen Bohrung (22) versehene Wand ist, die am Übergang zum zylindrischen Ansatz (24) eine Ringschulter (26) aufweist zur Auflage auf den Rand des zweiten zylindrischen Wandungsteiles (6) des benachbarten Treppenelementes.Stair element according to claim 1, characterized in that the inner wall (20) of the first cylindrical wall part (4) is an upwardly tapering wall provided with a central bore (22) which at the transition to the cylindrical extension (24) has an annular shoulder ( 26) has to rest on the edge of the second cylindrical wall part (6) of the adjacent stair element. Treppenelement nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das zweite zylindrische Wandungsteil (6) einen sich über das erste zylindrische Wandungsteil (4) nach oben hinaus erstreckenden zylindrischen Schaft (28) aufweist, der von einer mit einer zentralen Bohrung (32) versehenen Abschlußwand (30) verschlossen ist.Stair element according to claim 1 or 2, characterized in that the second cylindrical wall part (6) has a cylindrical shaft (28) which extends upwards beyond the first cylindrical wall part (4) and which is provided with a central bore (32) End wall (30) is closed. Treppenelement nach Anspruch 1 oder 3, dadurch gekennzeichnet, daß die Innenwand oder die Schaft-Abschlußwand des zweiten zylindrischen Wandungsteiles (6) eine nach unten konisch verlaufende, mit einer mittigen Bohrung (32') versehene Wand (30') ist, die am freien Ende des Schaftes mit der Wandung des Schaftes eine ebene Auflageringfläche (33) für die Ringschulter (26) des benachbarten Treppenelementes bildet.Stair element according to claim 1 or 3, characterized in that the inner wall or the end wall of the shaft of the second cylindrical wall part (6) is a downwardly tapering wall (30 ') provided with a central bore (32'), which is free End of the shaft with the wall of the shaft forms a flat support ring surface (33) for the ring shoulder (26) of the adjacent stair element. Treppenelement nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß zwischen den miteinander zu verbindenden Treppenelementen wenigstens ein Distanzring (36) angeordnet ist zum Höhenausgleich und/oder zur Einstellung der Tritthöhe.Stair element according to one of claims 1 to 4, characterized in that at least one spacer ring (36) is arranged between the stair elements to be connected to one another for height compensation and / or for adjusting the step height. Treppenelement nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die beiden zylindrischen Wandungsteile (4, 6) durch ein Zwischenstück (10) miteinander verbunden sind, das eine geschlossene, im wesentlichen halbrunde untere Wandung (12) und ein flaches, oberes Wandungsteil (14) aufweist, dessen Oberfläche mit den Oberflächen von seitlichen Flanschen (16, 18) fluchtet, die sich von dem oberen Teil des ersten zylindrischen Wandungsteiles (4) und in geringerem Maß von dem Zwischenstück (10) aus erstrecken und zum Auflegen und Befestigen der Trittplatte (8) dienen.Stair element according to one of the preceding claims, characterized in that the two cylindrical wall parts (4, 6) are connected to one another by an intermediate piece (10) which has a closed, essentially semicircular lower wall (12) and a flat, upper wall part (14), the surface of which is flush with the surfaces of side flanges (16, 18) which extend from the upper part of the first cylindrical wall part (4) and to a lesser extent from the intermediate piece (10) and for laying on and fastening serve the tread plate (8). Treppenelement nach einen der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Bohrungen (32, 32') der Wände (30, 30') als Gewindebohrungen für den Schraubbolzen (34) ausgebildet sind.Stair element according to one of the preceding claims, characterized in that the bores (32, 32 ') of the walls (30, 30') are designed as threaded bores for the screw bolt (34).
EP92105511A 1991-04-11 1992-03-31 Stair element for an overhanging stair with a central stringer Expired - Lifetime EP0508274B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4111819 1991-04-11
DE4111819A DE4111819A1 (en) 1991-04-11 1991-04-11 STAIRCASE ELEMENT FOR A SUPPORTING STAIRCASE WITH A MEDIUM BAR

Publications (2)

Publication Number Publication Date
EP0508274A1 true EP0508274A1 (en) 1992-10-14
EP0508274B1 EP0508274B1 (en) 1994-05-18

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EP92105511A Expired - Lifetime EP0508274B1 (en) 1991-04-11 1992-03-31 Stair element for an overhanging stair with a central stringer

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EP (1) EP0508274B1 (en)
AT (1) ATE105900T1 (en)
DE (2) DE4111819A1 (en)
ES (1) ES2056675T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE175748T1 (en) * 1995-03-18 1999-01-15 Guenter Holzkaempfer STAIR ELEMENT FOR A FREE-SUPPORTING STAIR WITH A CENTER STRUT
HU2870U (en) * 2004-07-08 2005-02-28 Richard Berger System consisting of stairs element

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1903208A1 (en) * 1969-01-23 1970-12-03 Karl Koepke Koesta stair elements, element construction
DE2710641A1 (en) * 1976-03-22 1977-09-29 Oswald Rada Adjustable overlapping stringer element connected staircase - has tread panels with bolts in sloping slots on displaceable U:shaped parts
DE2813199A1 (en) * 1978-03-25 1979-10-04 Holzkaempfer CANTILEVER STAIRS WITH A CENTRAL STAIR CONSTRUCTED FROM INDIVIDUAL ELEMENTS
US4619084A (en) * 1985-01-28 1986-10-28 Snitman Bernard H Articulating, self-supporting staircase

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2219788A1 (en) * 1972-04-22 1973-10-31 Luechtrath Bernd STAIR-SHAPED SUPPORTING CONSTRUCTION FOR STRAIGHT AND / OR TWISTED STAIRS
US4373609A (en) * 1980-12-22 1983-02-15 Victor De Donato Stairway stringers constructed of cast, readily-assembled units

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1903208A1 (en) * 1969-01-23 1970-12-03 Karl Koepke Koesta stair elements, element construction
DE2710641A1 (en) * 1976-03-22 1977-09-29 Oswald Rada Adjustable overlapping stringer element connected staircase - has tread panels with bolts in sloping slots on displaceable U:shaped parts
DE2813199A1 (en) * 1978-03-25 1979-10-04 Holzkaempfer CANTILEVER STAIRS WITH A CENTRAL STAIR CONSTRUCTED FROM INDIVIDUAL ELEMENTS
US4619084A (en) * 1985-01-28 1986-10-28 Snitman Bernard H Articulating, self-supporting staircase

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Publication number Publication date
DE4111819A1 (en) 1992-10-15
ES2056675T3 (en) 1994-10-01
DE59200167D1 (en) 1994-06-23
EP0508274B1 (en) 1994-05-18
ATE105900T1 (en) 1994-06-15

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