DE29806952U1 - Spacer for fireplace insert pipe - Google Patents

Description

GNUG & PARTNER

WESTPHAL MUSSGNUG & PARTNER

PATENT ATTORNEYS- EUROPEAN PATENT ATTORNEYS

U.Z.: bueO13

Josef Buehler
Jakob-Barth-Strasse 11
78187 Geisingen

SPACER FOR CHIMNEY INSERT PIPE

The invention relates to a spacer for a chimney insert pipe according to the preamble of claim 1.

Known spacers of this type have a retaining ring with spring-loaded spacer brackets arranged at mutual distances, which extend outwards over the outer circumference of the retaining ring and are supported by springs on the inner wall of a chimney. This makes it very easy to anchor the insert pipe in the correct position inside the chimney. The retaining ring is usually split and is tightened using a turnbuckle, a screw with a worm thread or the like and is thus fixed to the outer surface of the insert pipe.

Since the spacers have to be as inexpensive as possible, the clamping devices of the well-known retaining rings are far too expensive. In addition, they are also comparatively complicated to handle.

The invention aims to improve a spacer of this type so that it can be manufactured much more

D-78048 VS-Viilingen · Waldstrasse 33 · Telephone 07721 88380 ■ Fax 07721 883850

cheaper and easier to install.

This object is achieved according to the invention by the features of claim 1.

With the spacer according to the invention, the retaining ring only has to be loosely pushed onto the outside of the insert tube, and then one or more beads of the retaining ring have to be squeezed together with pliers in the circumferential direction of the retaining ring until the retaining ring sits firmly on the outside of the insert tube. This can be done one after the other with several retaining rings. This makes it extremely easy to manufacture and assemble the spacer according to the invention.

The subclaims are directed to advantageous embodiments of the invention.

Embodiments of the invention are explained in more detail with reference to the figures. It shows:

Figure 1 shows an axial section through a chimney section with inserted insert pipe,

Figure 2 is a side view of a first embodiment of the spacer,

Figure 3 is a plan view of the spacer shown in Fig. 2,

Figure 4 is a plan view of the spacer shown in Fig.3 with the insert tube shown in dash-dotted lines and assembly tool in the form of pliers,

Figure 5 is a side view of a second embodiment of the spacer,

Figure 6 is a side view of a third embodiment of the spacer,

Figure 7 is a partial plan view of the spacer shown in Fig.6,

Figure 8 is a side view of a fourth embodiment of the spacer, and

Figure 9 is a plan view of the spacer shown in Fig.8.

In the first embodiment shown in Figures 1 to 4, the spacer 10 according to the invention has a circular retaining ring 14 made of sheet metal or the like, which surrounds the insert pipe 12, which is also circular, and resilient spacer brackets 16 which are attached to the retaining ring 14 at mutual intervals, extend axially upwards and radially outwards from the retaining ring and are distributed at equal mutual intervals around the circumference of the retaining ring. When the insert pipe 12 is installed inside a brick chimney 18, for example, with a circular chimney inner wall 20 in this case, the resilient spacer brackets 16 spread out on the chimney inner wall 20 in such a way that the chimney is held in a central position in the chimney 18. At least one spacer 10 is provided near the upper and lower ends of the insert tube 12, but if necessary more spacers 10 can be distributed over the length of the insert tube 12. In the embodiment according to Figures 1 to 4, four

Spacer brackets 16 are provided on the retaining ring 14, which are curved in such a way that they are open towards the insert tube 12. As can be seen from Fig.4, approximately in the middle between two adjacent spacer brackets 16 there is a bracket which is slightly curved outwards from the retaining ring 14 and which is axially aligned with the retaining ring in its longitudinal extension.

14 is mounted in the retaining ring 14. Using an assembly tool, e.g. a pair of pliers 22, each bead

15 are squeezed together in the circumferential direction in the manner shown in Fig.4 after the retaining ring 14 has been loosely pushed onto the insert tube 12 until the retaining ring 14 is frictionally secured to the outside of the insert tube 12.

The only difference between the spacer 10' shown in Fig. 5 and the spacer 10 according to Figures 1 to 4 is that the spacer brackets 16' are open to the outside, i.e. away from the insert tube 12.

The spacer 10" according to Figures 6 and 7 has a retaining ring 14' with a slightly larger axial height. In order to ensure that the beads, which have become longer as a result, can still be squeezed together with a normal amount of force using pliers, they are divided into two in this embodiment into an upper half 15' and a lower half 15". The upper half 15' and the lower half 15" are separated by a slot 24 in the retaining ring 14', the extent of which in the circumferential direction of the retaining ring 14' is slightly larger than that of the beads 15', 15". The latter applies both to the state of the spacer 10" before the beads are squeezed together and to the fixed state of the same after the beads 15', 15" are squeezed together.

The embodiment shown in Figures 8 and 9 is designed for insert tubes with a cross-section of approximately square.

which are generally used in chimneys with a square chimney opening. In this embodiment, a spacer bracket 16" or a bead 15"' is provided on each side of a rounded corner 26 of the essentially square retaining ring 14" of the spacer 10"'.

Otherwise, the same reference symbols are used for identical parts in all figures.

Claims (9)

WESTPHAL MUSSGNUG.St PATENT ATTORNEYS EUROPEAN PATENT ATTORNEYS U.Z.:bueO13 PROTECTION OF PATENT LAWS 1. Spacer for a chimney insert pipe made of steel, ceramic or plastic, which consists of a retaining ring that surrounds the insert pipe and is to be fixed thereon and spring-loaded spacer brackets attached to the retaining ring, characterized in that the retaining ring (10, 10', 10", 10"') is closed in itself and has one or more outwardly projecting beads (15, 15', 15", 15"') that run axially to the retaining ring and that can be squeezed together in the circumferential direction by means of an assembly tool (22) to reduce the circumference of the retaining ring (10, 10', 10", 10"') and thus to fix it on the insert pipe (12). 2. Spacer according to claim 1, characterized in that between each two spacer brackets (16, 16', 16") a bead (15, 15', 15", 15"') is arranged. 3. Spacer according to claim 1, characterized in that the bead (15, 15', 15") is arranged approximately centrally between two spacer brackets (16, 16'). 4. Spacer according to one of the preceding claims, characterized in that the retaining ring (14, 14') is circular. 5. Spacer according to one of claims 1 to 3, characterized in that the retaining ring (14") D-78048 VS-Villingen · Waldstrasse 33 · Telephone 07721 88380 · Fax 07721 883850 is approximately square. 6. Spacer according to one of the preceding claims, characterized in that each bead (15, 15"') runs over the axial height of the retaining ring (14, 14"). 7. Spacer according to one of claims 1 to 5, characterized in that each bead (15', 15") is divided into two in the axial direction and that a slot (24) running in the circumferential direction of the retaining ring (14') is provided between the two parts (15', 15") of the bead. 8. Spacer according to one of the preceding claims, characterized in that each spacer bracket (16, 16") is open inwards. 9. Spacer according to one of claims 1 to 7, characterized in that each spacer bracket (16') is open to the outside.