[0001] The present invention relates to a water seal for wash basins or the like comprising
a fastening portion by which the water seal can be attached to the basin at said basin's
outlet by fastening means, a frame portion attached to the fastening portion, said
frame portion being formed by two concentrical pipes attached to each other at their
upper end, the outer one of said pipes being provided with a pipe stub, and a bottom
portion detachably attached to the outer pipe of the frame portion.
[0002] In connection with various wash basins water seals attached to the outlet at the
bottom of the basin are used, which water seals are made of metal or plastics. Known
water seals consist of a fastening portion in the shape of a truncated cone, in the
middle of which is a body provided with inside threads to which a screw extends from
the strainer of the basin. The fastening body extends downward from the conical part
as a vertical pipe. The water seal comprises further a frame portion, the inner pipe
of which surrounds the vertical pipe of the fastening portion and is closely attached
to it. The outer pipe of the frame portion comprises, in addition, a pipe stub to
which the other discharge pipes are connected.
[0003] This known structure is complex and thus expensive and it has a potential leakage
spot between the vertical pipe of the fastening portion and the inner pipe of the
frame portion. In addition, the construction is relatively high which reduces the
applicability of a cabinet situated under the basin.
[0004] The object of the present invention is to achieve a water seal with a simple construction,
without any potential leakage spot and which, in addition, is low. The water seal
according to the invention is characterized in that the fastening portion is located
in the inner pipe of the frame portion.
[0005] By placing the fastening portion in the inner pipe of the frame portion the advantage
is achieved that the vertical pipe of the fastening portion and the inner pipe of
the frame portion, which exist in known solutions, can be replaced by an only pipe
which simplifies the construction a great deal. This omits also the possible leakage
spot between the pipes. In addition, the height of the water seal construction is
reduced since the fastening portion no longer is located above the frame portion,
but inside it.
[0006] When producing the water seal of plastic the fastening portion can in'a simple way
be made integral with the frame portion.
[0007] I The attaching of the water seal to the wash basin is simplified if the upper part
of the inner pipe of the frame portion, where the fastening portion is located,-expands
conically upward.
[0008] A placement of the fastening portion in accordance with the invention enables the
fastening portion to be placed at the same height as the pipe stub.
[0009] A preferred embodiment of the water seal according to the;invention will be described
more closely in the following with reference to the attached drawing, wherein
Figure 1 is a vertical section of the water seal according to the invention and
Figure 2 is a top view of the water seal.
[0010] The water seal shown in the drawing is formed by a fastening portion 1, a frame portion
2, with a pipe stub 3, which in the presented case is an actual pipe, and a bottom
portion 4. In Figure 1 is with a dotted line further presented a restrainer 5 of the
wash basin. The bottom portion 4 is detachably attached to the frame portion 2 by
snap-in joint and the joint is sealed by a sealing ring 6. The fastening portion 1
is formed of a body 7 located on the middle line of the water seal, said body comprising
vertical inner threads 8 and from the outer surface of which radial wings 9 extend.
[0011] The frame portion of the water seal consists of two concentrical pipes, an outer
pipe 10 and an inner pipe 11, which are connected to each other from the upper end.
The water seal is formed by a water column between the lower end of the inner pipe
11 and the lower edge of the pipe 3.
[0012] According to the invention the fastening portion 1 is attached to the inner pipe
11 of the frame 2. The fastening portion is located at such a distance from the upper
end of the pipe 11 that the basin's restrainer 5 fits inside the pipe 11 above the
fastening portion. In order for the upper end of the pipe 11 to be mounted tightly
against the lower surface of the basin the upper end 12 of the pipe 11 has the form
of an upwardly expanding truncated cone. The fastening portion 1 is attached by means
of its wings 9 to the lower edge of said expanding portion 12 substantially at the
same height as the pipe 3.
[0013] The fastening portion 1, the frame portion 2 and the pipe 3 form,as illustrated in
the Figure, preferably an integral piece which is easy to achieve when the material
is plastic. Thus the water seal according to the invention is formed of only two pieces
which reduces the number of possible leakage spots. The water seal is attached to
the basin by a screw (not shown) whose head rests on the basin's restrainer which
is attached to the threads 8 of the body 7.
[0014] In an alternative embodiment the pipe 11 can be made straight over the whole length
thereof and the fastening portion 1 can be manufactured separately and be attached
to the pipe 11.
1. A water seal for wash basins or the like comprising a fastening portion (1) by
which the water seal can be attached to the basin (5) at said basin's outlet by fastening-means,
a frame portion (2) attached to the fastening portion, said frame portion being formed
by two concentrical pipes (10, 11) attached to each other at their upper end, the
outer one (10) of said pipes being provided with a pipe stub (3), and a bottom portion
(4) detachably attached to the outer pipe (10) of the frame portion, characterized
in that the fastening portion (1) is located in the inner pipe (11) of the frame portion.
2. A water seal according to claim 1, characterized in that the fastening portion
(1) forms an integral piece with the frame portion.
3. A water seal according to claim 1, characterized in that the upper end (12) of
the inner pipe of the frame portion where the fastening portion (1) is located widens
conically upward.
4. A water seal according to claim 1, characterized in that the fastening portion
(1) lies at the same horizontal plane as the pipe stub (3).