DEVICE FOR EXTENSION OF ALUMINIUM DUCTS

Abstract: Device for pulling out compressed, extendible aluminium ducts (2) by means of only one person. At its outer end, an end piece (1) made of steel is inserted in the aluminium duct (2), having a portion with decreased diameter which is inserted into the duct (2) and fixed to this, such as by spot welding. A strip (3) of plastics is threaded through diametrically opposed apertures (4, 5) at the outer end of the end piece (1), the strips thereafter being placed against each other at the opening of the end piece and in a suitable way fixed to each other. Hereby an attachment at the end of the duct is achieved, which can be secured to suitable means, for example a door handle, a nail or such, in such a way that one person alone can pull out the duct to the full length, from the from the other end of the duct.

Description: DEVICE FOR EXTENSION OF ALUMINIUM DUCTS This invention relates to a device for pulling out compressed manufactured, extendible aluminum ducts. Such ducts are increasingly used as theyhave great advantages in connection with storing and transportation, as well as assembling. Such extendible ductsfrequently are delivered to the construction sites in lengths of e.g.1m and thereafter may be pulled out to full length of 3 m. For known ducts of this type, two persons have to be available to accomplish the extension from 1 m to 3 rrt length. The invention provides a device making it possible for one person to undertake such extension of the extendible, compressed aluminum ducts. By means of the features described in the characterizing clause of the claims, such aluminum ducts may be pulled out by one person by means of a suitable securing, such as a door handle, a nail etc. The invention thereby accomplishes significant practical and economic savings at the construction sites.. The drawing discloses schematic, in perspective- view, one end of a channel with an end piece inserted. Anend piece 1 made of steel, has substantially the same diameter as the duct, but at the edge it is provided with a decreased diameter for insertion into the channel 2. Upon installing in the channel, the channel is secured to the end piece 1, for example by spot welding. A strip 3 of plastics is threaded through diametrically opposed apertures 4 and 5 at the outer edge of the ende piece 1, whereafter the two ends of the strip 3 are placed against eachother at the end of the end piece 1 and thereafter fixed to eachother in a suitable way. By means of the device according to the invention, a holding device is achieved, which can be secured to the one ende of the extendible duct in such a way that one OMPI person can secure the strip 3 to suitable fixed means and by himself pull the other end of the duct to the full length before assembling .

Claims: AMENDED CLAIMS [received by the International Bureau on 29 June 1984 (29.06.84); original claim 1 amended] 1. Device for pulling out compressed, extendible aluminum ducts (2), c h a r a c t e r i z e d i n tha each end of each duct (2) has secured a cylindric end piece (1) made of steel, and that a strip (3) of plastics " is fixed to diametrically opposed positions on the end piece (1). 2. Device according to claim 1, c h a r a c t e r i s e d i n that the strip (3) of plastics extends through two diametrically opposed apertures (4, 5) in the end piece (1) , whereby the two ends of the strip (3) are secured to eachother outside the end piece (1).

Inventors: MARTINSEN FINN, MARTINSEN, FINN
Applicants: MARTINSEN FINN AS, FINN MARTINSEN A/S
Application year: 1984
Main classification: F16L55
IPC codes: F16L55