Buckles – buttons – clasps – etc. – Bale and package ties – hose clamps – With tighteners
Patent
1985-08-21
1987-05-26
Sakran, Victor N.
Buckles, buttons, clasps, etc.
Bale and package ties, hose clamps
With tighteners
24279, B65D 6302
Patent
active
046673750
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a hose clip including at least one annularly formed tension band, the ends of which are connected to a tensioning device for regulating the girth of the hose clip conventionally.
Hose clips are commonly used within many branches of technology for removably connecting an elastic hose or the like to some form of pipe end. In such connections it is usual to tighten the hose clip with as large a force as possible with the object of achieving a tight and secure connection. This results in that radially inwards of the hose clip, the hose material is compressed and also pressed axially sideways. As a result, and with regard to the aging properties of the hose material, this causes the connection to have poor elasticity. In turn, this leads to the hose material not beeing able to compensate for changes caused by temperature variations in the connection. A consequence of deteriorated elasticity is that the hose material is given permanent deformation and that the tightness of the connection is adventured. Sooner or later there will be leakage problems, which are most clearly observed when the connection is subjected to severe cooling.
A usual method of solving leakage problems is to tighten the hose clip further. This is a very short-sighted solution however. The hose material is namely subjected to further compression which further deterioates its elasticity and thereby its ability to accompany temperature changes.
Devices which automatically re-tighten a hose clip are already known. Such devices may comprise a spring means which tangentially acts on a worm screw that tightens a hose clip so that the clip is re-tightened. Such a solution is illustrated in the Swedish Patent Application No. 7812588-7. However, the same disadvantages occur in this type of hose clip as occur when manually re-tightening a hose clip, and this automatically re-tightening hose clip therefore does not have any great application in practice.
Another variation of a hose clip with automatic re-tightening is described in the Swedish Pat. No. 415920. This hose clip includes a conventional hose clip supplemented by a spring-biassed insert having a tubular cross section. The insert is intended to engage with spring bias against a host and compensate for the deformations taking place in the hose material. Neither does this implementation prevent deformation of the hose material on tightening, which reduces the elasticity of the hose. As with the previously mentioned implementations, the hose material will namely be subjected to radial compression simultaneously as it is pressed axially sideways.
The present invention has the object of better enabling a tight and secure hose connection than implementations known up to now. In contradistinction to known implementations, the invention has the object of primarily avoiding the situation where the hose material loses its elasticity, although the invention also has the object that an inventive hose clip will compensate for the hose material losing its elasticity, should this condition occur.
Further to this, the invention shall enable connections which are simple to fit and which are applicable for many different types of hose connection. In accordance with the invention, the mentioned objects are achieved by the hose clip being formed with at least two inwardly directed ridge-like beads, or the like, extending substantially annularly along the inside of the band.
By the inventive hose clip compressing a part of the hose material between the ridge-like beads when being tightened round an elastic hose, there is avoided outflow of material at the sides of the clip, which is a normally present disadvantage in known embodiments of hose clips. The radial pressure from the clip between the beads is comparatively small, and the hose material there is thus only subjected to minor compression. This results in that the hose material there can maintain its elasticity longer than in known embodiments.
By forming the beads with radial spring bias there is obtained an automatic re-tig
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ABA Invest AB
Sakran Victor N.
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