Classifying – separating – and assorting solids – Sifting – Elements
Patent
1996-02-26
1997-08-12
Dayoan, D. Glenn
Classifying, separating, and assorting solids
Sifting
Elements
209412, B07B 149
Patent
active
056556667
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF THE INVENTION
The invention relates to a sieve comprising a fine wire mesh (3) securely connected to a wire ring (8) and two annular casings (1, 2) detachably connected to one another by means of clamping elements (5) and securely clamping the wire mesh and the wire ring.
The field of application of the invention concerns strainers for culinary purposes.
PRIOR ART
A sieve of the generic type is described in DE-U-91 15 840. The wire mesh must be removed after each use for purposes of cleaning. This is vital in the catering trade for reasons of food hygiene. In this sieve, the wire mesh can easily be damaged when it is drawn over the end edge and squeezed in the gap, and as a result of this it may become unusable prematurely.
DE-A1-39 07 777 furthermore describes a sieve, where the first annular casing terminates in an end flange and the second annular casing has a radial annular step which reaches over the end flange. The sieve part, which is constructed as a metal disc, is clamped at its edge between the end casing and the annular step. This type of attachment is unsuitable for a sieve part comprising a wire mesh.
SUMMARY OF THE INVENTION
The object of the invention is a construction of the sieve such that the wire mesh may be assembled and disassembled carefully, so that the risk of damage thereto is eliminated.
This object is achieved according to the invention in that the wire mesh (7) is planar and the wire ring (8) is placed on one face of the wire mesh (7), in that the first annular casing (1) terminates in a rounded end flange (3), in that the wire ring (8) reaches over the outer edge of the end flange (3) and in that the second annular casing (2) has a rim (5), aligned in the axial direction, of a radial annular step (4) which reaches over the end flange (3) and the wire ring (8).
The invention differs from the prior art in that the wire mesh is planar and is placed between the end flange and the annular step. When the annular casings are placed together, sliding movements with regard to the face of the wire mesh do not occur. The wire ring centers the wire mesh perfectly. Assembly and disassembly of the sieve for the necessary cleaning after each use do not shorten the service life of the wire mesh.
So that edges of the end flange cannot damage the wire mesh, the invention also provides for the end flange to have a cross section in the shape of a quarter circle.
A flush and careful mounting of the wire mesh is ensured in that the annular step is offset at a right angle from the second annular casing and butts onto the end flange.
A long-lasting material connection is achieved in that the wire ring is connected to the wire mesh by means of a welded connection.
Particular ease of operation is achieved in that the clamping elements are constructed as clamping levers.
SHORT DESCRIPTION OF THE DRAWING
An example embodiment of the invention is explained below with reference to the drawing. In the drawing:
FIG. 1 shows a view from below and
FIG. 2 shows a section through the sieve.
EXAMPLE EMBODIMENT
A first annular casing 1 and a second annular casing 2 both have the same internal diameter. The first annular casing 1 terminates in an end flange 3 having a cross section in the shape of a quarter circle, whereof the edge delimits a planar end face.
The second annular casing 2 has an annular step 4, bent off at a right angle, which is opposite the end flange 3. An axially aligned rim 5 adjoins the annular step 4, the internal diameter of the rim 5 being greater than the external diameter of the outer edge of the annular flange 3, so that a gap remains between the outer edge of the annular flange 3 and the axial rim 5.
Clamping elements 6, preferably in the form of clamping levers, are mounted on the annular casings 1 and 2, enabling the annular casings to be placed together axially.
The outer edge of a planar wire mesh 7 in the form of a circular disc is positioned on a wire ring 8 and connected materially thereto by means of a welded connection.
All parts of the sieve are m
REFERENCES:
patent: 221322 (1879-11-01), Kennedy
patent: 3406823 (1968-10-01), Crain
patent: 3800943 (1974-04-01), Riesbeck et al.
patent: 3875065 (1975-04-01), Rosenblum
patent: 3888765 (1975-06-01), Bolk
patent: 4096058 (1978-06-01), Borie
patent: 4929346 (1990-05-01), Si-Lin
Dayoan D. Glenn
Schindler Edwin D.
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