Fluid handling – Systems – Multi-way valve unit
Reexamination Certificate
2000-01-18
2001-01-16
Fox, John (Department: 3753)
Fluid handling
Systems
Multi-way valve unit
C251S160000
Reexamination Certificate
active
06173743
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a distributor for liquids.
The distributor proposed by the invention is of the type comprising a base body radially compartmented as per the intended application and provided with pertinent outlets, a cover being secured on top of the body, a rotatable obturator bell being innerly interposed between the portion provided with the liquid inlet and the compartmented portion provided with the liquid outlets, said obturator bell being provided with a communication opening and governed by an external control handle that will slightly lift it off said compartmented portion, a spring keeping said bell in abutting contact against the top of said compartmented portion, said bell being thus apt to be rotated to the intended position.
BACKGROUND OF THE INVENTION
One of the problems presented by the known distributors of this type lies in the fact that the base body and the cover, this latter in many cases forming a receptacle of dimensions similar to those of the base body and comprising the liquid inlet, are joined together through their respective open top and open bottom in a complex way by mutually fastening their corresponding outer flanges by means of bolts and nuts which with the passage of time do usually deteriorate and loosen thus giving rise to the consequent drawbacks such as leaks.
Another problem lies in the fact that the bell is generally provided in such a way that it rests on the open top of the compartmented portion through a seal fitted into said open top, into the edge of the compartmenting partitions and into that of the central core of said compartmented portion, this giving rise to the fact that when the liquid flows into the distributor the sand (in case of fitting the distributor to filters) or other residues possibly carried by said liquid do accumulate particularly on the external portion of said seal thus facilitating the erosion and wear of this latter.
This erosion takes place when actuating the bell and mainly when closing it onto the compartmented portion of the distributor, since the helical spring pushing said bell against said compartmented portion tends to rotate the former during said closure, this giving rise to a friction caused by the sand against the seal and hence to said progressive deterioration of this latter which then has to be replaced with another one with the consequent inconvenience caused by this.
Another drawback of the known distributors lies in the fact that the obturator bell is associated with the external control handle through a shaft attached to said bell, said shaft sometimes getting loose with the use and thus also giving rise to consequent serious problems even related with the vertical guiding and shifting of the bell.
Also when the external control handle is actuated in order to lift the bell this latter is usually given an excessive shift that can damage it or other elements of the distributor, as well as the spring pushing said bell against the compartmented portion, due to an excessive compression of said spring.
OBJECTS AND SUMMARY OF THE INVENTION
All these problems and drawbacks and others possibly deriving from them are solved with the distributor for liquids according to the present invention, said distributor having its base body formed by two portions of different diameter, the upper portion having the bigger diameter laterally comprising the liquid inlet, whereas the lower portion comprises the several outlets and the compartmenting partitions starting from a central core, the bell being located inside the base body and resting on the edges of said partitions and core and also on the peripheral step determined by the two portions of said base body, the cover closing said body by being fitted onto it as per a bayonet coupling arrangement not needing bolts and nuts.
In the present distributor the obturator bell is the element comprising the seal (this latter being a doubly annular seal provided with radial lengths), said seal being partially inlaid in corresponding grooves provided in the lower sealing edges of said bell thus not allowing the sand or other residues to accumulate on it since when the bell is lifted said seal is also lifted with it, and thus said residues slide towards the inside of the base body before the bell is closed.
The shaft associating the bell with the external control handle is an advantageously integral part of said bell and cannot therefore be detached from this latter, the manufacture thus becoming easier and therefore more economical, said shaft also comprising an axial hollow opening through the bottom of the bell and allowing to perfectly guide said bell on an upper appendage of the central core of the lower portion of the base body.
The external control handle is in its turn formed by a handle having a lower stop delimiting its downward shift when it is actuated in order to lift the bell hence delimiting the shift of this latter when being lifted and thus preventing an excessive compression of the spring pushing said bell.
In order to facilitate the action of the handle on the top flat surface of the cover where said handle rests though its end the central area of said surface comprises a discoidal recess housing a friction washer being upperly flush with said surface.
The top surface of the cover is also provided around the central area with an annular salient with radial slots into one or another of which a radial appendage will be introduced which is provided on the end of the handle resting on said cover, in order to thus stabilize the position chosen for the bell, this allowing to do without the provision of a depression with radial recesses hitherto provided in the distributors for liquids and whose configuration made it difficult to remove the sand and other residues accumulating in it and hence hindering the perfect stabilization of the bell.
REFERENCES:
patent: 2253020 (1941-08-01), Daniels
patent: 2451678 (1948-10-01), Johnson et al.
patent: 3640310 (1972-02-01), Erlich
patent: 3911956 (1975-10-01), LeBreton et al.
Fox John
Steinberg & Raskin, P.C.
Valvules I Racords Canovelles, S.A.
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