Inlet portion of a valve

Fluid handling – Diverse fluid containing pressure systems – Gas pressure storage over or displacement of liquid

Patent

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Details

13762517, 137801, F16K 4702

Patent

active

060296909

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

The present invention relates to an inlet portion of a valve, comprising a tube element having at least one connection piece providing a connection to a connecting tube, which in turn is connectable to a water supply net.


BACKGROUND OF THE INVENTION

An inlet portion of a mixing valve is, e.g., known from SE-B-460 553. The connecting tubes are affixed soldering free and swivel connectable as a widened end part of the respective connecting tube are axially non-disposably mounted between the connecting piece and a site of the valve housing. The sites are placed deeply into the valve housing in a direct connection to the mixing unit arranged in the valve housing, which means that the tubes extend through an intermediate part between two partition walls in the valve housing. As a consequence of the design of the valve housing this will become relatively complicated to cast. Casting defects may arise due to the fact that the partition walls centrally placed in the valve housing will freeze prior or later than the other parts of the valve housing. If cracks should arise in the castings parts of the production have to be scrapped which increases the production costs.
Another problem of these known valves are that the mixing unit is provided with narrow passages for the water which passages creates a noise (a so called framework sound) which is distributed via the water supply system of a residential building.


THE TECHNICAL PROBLEM

One of the objects of the present invention is thus to obtain a valve which is more simple to manufacture which valve has soldering-free and swivel connectable connecting tubes. Another object is to obtain a reduction of the noise created by the mixing unit of the valve.


THE SOLUTION

In order to obtain these objects the invention is characterized in that the connecting piece of the tube element is provided with a tube part being coaxially arranged to the connecting tube, which tube part extends partly into the tube channel of the connecting tube and has such dimensions that a slit space is maintained between the tube part and the channel wall. By means of this design of the inlet connecting piece an surprisingly large suppress of the noise caused by the passages of the mixing valve.
According to a preferred embodiment of the invention the tube part comprises two cross walls being arranged mainly perpendicular to the connecting piece, which walls are connected to each other via a spacer. By means of this embodiment of the tube part the casting of the valve housing can be considerably simplified.


DESCRIPTION OF THE DRAWINGS

The invention will be more fully described in the following with reference to examples shown on the attached drawing, wherein
FIG. 1 shows a vertical cross-section through a mixing valve, e.g., a wash basin mixer, which is provided with an inlet part of the invention;
FIG. 2 shows side view of the inlet part of FIG. 1;
FIG. 3 shows the inlet part according to FIG. 2 but being rotated 90.degree. its axis;
FIG. 4 shows the inlet part seen from above;
FIG. 5 shows the inlet part seen from beneath;
FIG. 6 shows a stopping washer cooperating with the inlet part seen in a view from above; and
FIG. 7 is a cross-section along the line VII--VII of FIG. 6.


DESCRIPTION OF AN EMBODYING EXAMPLE

In the following the inlet part of the invention will be described in connection with a so called one hand mixer which is connected to lines comprising both hot water and cold water. The inlet part may, of course, be applied on a simple valve having no mixing function, i.e. to provide a simple flow, as well.
The one hand mixer shown in FIG. 1 has a mainly conventional design and comprises a valve housing 10 with a spout 11 and a maneuvering handle 12. The handle 12 can, according to known technology, be regarded as a two armed lever which is mounted around a vertical as well as a horizontal axis and the shorter lever 13 of which influences a movable valve plate 14 cooperating with an affixed valve plate 15, which is provided with two inlet openings 16, of which

REFERENCES:
patent: 1490291 (1924-04-01), Rose
patent: 3565338 (1971-02-01), Wright
patent: 4111224 (1978-09-01), Sandstrom
patent: 5494076 (1996-02-01), Knapp
patent: 5871029 (1999-02-01), Peteri et al.
"International Search Report" dated Aug. 6, 1997.
"International Preliminary Examination Report" dated Apr. 20, 1998.

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