Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1984-11-02
1986-05-13
Moore, Chris K.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
15422, A47L 538
Patent
active
045876878
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a mounting piece for a suction hose of a central vacuum cleaning system. The sucking central unit of the central vacuum cleaning system is in apartments placed wholly outside the dwelling space, for example, in a dry store. The main piping, which begins at the central unit and branches off into the different spaces according to requirement, is placed into the floor and wall constructions of the building. A suitable number of suction boxes like electric plug boxes is placed in the apartments and in such places that one can reach everywhere with a suction hose of 5 to 8 meters. When vacuum cleaning one needs only suitable nozzles besides an elastic suction hose and a tubular vacuum wand.
As the piping is installed into the constructions, it is important to prevent it, in different ways, from getting clogged. In addition to the smooth pipe construction without any surfaces that objects collide with, it has been known to use in the connection piece of the suction hose a grating which prevents big objects and pieces of clothing from getting into the piping or unauthorized pushing of articles straight into the suction hose or the pipe. This grating has, however, in practice proved to be easily blocked because, at the same time as it prevents big objects from getting into the piping, it collects hair, bits of thread and pieces of paper that should go through the piping into the refuse container of the central unit when one is vacuum cleaning.
The present invention is intended to provide a mounting piece that does not have the above-mentioned drawbacks and that can be depended on to prevent too big objects from getting into the piping. This has been accomplished in the mounting piece in accordance with the invention thus that on the inner wall of the mounting piece there is at least one rib pointing inwards from the inner wall which prevents objects that would clog the suction piping from getting into the suction piping.
The preferable construction alternatives of the invention are one screw-shaped rib and, for example, four symmetrically placed straight ribs. The mounting piece in accordance with the invention is preferably made an integral part of the suction box, which is set into the wall and connected to the suction piping, or an integral part of the nozzle. The mounting piece can also be adjusted as an adjoint collar to some part of the suction hose.
Other preferable constructional details of the invention are depicted in the following, more closely referring to the enclosed drawings, where
FIG. 1 is a constructional schematic drawing of a part of the central vacuum cleaning system,
FIG. 2 shows a mounting piece in accordance with the invention set into the wall,
FIG. 3 shows a section of the mounting piece of FIG. 2 along the line A--A of FIG. 2,
FIG. 4 shows a second mounting piece in accordance with the invention set into the wall, into the wall, and
FIG. 6 shows the mounting piece according to FIG. 2 forming an integral part of the nozzle.
FIG. 1 shows schematically a part of the constructional parts of the central vacuum cleaning system. There the suction piping 5 is shown as set into the wall construction and the mounting piece in accordance with the invention and the suction box 6 are set between the suction piping 5 and the suction hose 4.
In FIG. 2 the mounting piece 1 is depicted from the front without the suction hose and the lid of the suction box. In FIG. 2 the mounting piece 1 has four ribs 3 protruding from its inner wall 2. These ribs reach some way towards the centre of the suction opening but, however, leave a sufficient gap in the centre so that only the articles that it is certain are small enough to get through the suction piping will get into it.
As shown in FIG. 3, the surfaces of the ribs 3 that meet the flow are preferably made inclined and smooth with regard to the suction direction, so that bits of thread, hair and corresponding articles that bump into the ribs will go with the air stream along the surface of the rib to the gap in the middle and from there
REFERENCES:
patent: 1255176 (1918-02-01), Kellogg
patent: 1755151 (1930-04-01), Henderson
patent: 2703905 (1955-03-01), Faith-Ell
patent: 2877313 (1959-03-01), Stoicos
patent: 3357039 (1967-12-01), Hayward
Ikonen Alpo
Lehtolahti Raimo
Mustalampi Reino
Allaway Oy
Moore Chris K.
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