Gas separation – With guide means effecting removal of constituent layer out... – At escape means for heavier constituent
Reexamination Certificate
1999-07-08
2001-07-31
Simmons, David A. (Department: 1724)
Gas separation
With guide means effecting removal of constituent layer out...
At escape means for heavier constituent
C055S471000, C055S473000, C416S14600A
Reexamination Certificate
active
06267794
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an aspirator for oil mists, particularly for machining devices, machine tools and the like.
It is known that during work with machine tools it is normal to use, as coolant, oil emulsions to which whole oils or other liquid coolants, are added, disjoined in water.
Usually only a very small fraction of coolant films clings to the machine tool and most of the film instead remains in the atmosphere; this causes pollution damage in addition to the fact that machine tools operators have to inhale the oil dispersions that are present near the machine tools.
Conventional aspirators separate the oil mist and recondense it in gradually larger particles (coalescence effect) as a direct consequence of the centrifugal force to which the oil particles are subjected.
Conventional aspirators are therefore provided with impellers, through which the oily air to be conditioned is introduced, and with a filtering body through which the air passes, releasing the oil particles, which accordingly tend to cluster and collect to be subsequently expelled from the aspirator by means of a drainage tube.
Conventional aspirators can usually be installed in a fixed position with respect to the machine tool; in other words, it is not possible to change the arrangement of the aspirator from operation with a vertical axis to operation with a horizontal axis.
Accordingly, this sometimes causes difficulties in maintenance because it is necessary to disassemble the aspirator from its support and it also does not facilitate the adaptation of a same type of aspirator to different machine types.
Furthermore, different machine tools require different impellers for air aspiration depending on the type of coolant liquid used, on the greater or smaller presence of solid dust, and on the intake air flow-rate that the aspirator is required to have.
For this purpose, each aspirator is provided with a specific impeller and therefore it is necessary to use a adapted aspirator according to the type of machine tool.
The need is also felt to improve drainage of the oil recovered from the oil mists aspirated by the aspirator and then discharged outside the aspirator.
SUMMARY OF THE INVENTION
The aim of the present invention is therefore to provide an aspirator for oil mists, particularly for machine tools and the like, which can be used operatively both with a horizontal axis and with a vertical axis without requiring the use of particular adaptor supports.
Within the scope of this aim, an object of the present invention is to provide an aspirator for oil mists, particularly for machine tools and the like, in which the drainage tube is arranged so as to improve the drainage of the oil recovered by the aspirator.
Another object of the present invention is to provide an aspirator for oil mists, particularly for machine tools and the like, in which it is possible to install impellers of different types according to the requirements and to the machine tools with which the aspirator is to be associated.
Another object of the present invention is to provide an aspirator for oil mists, particularly for machine tools and the like, in which maintenance and installation operations are simplified with respect to conventional aspirators.
Another object of the present invention is to provide an aspirator for oil mists, particularly for machine tools and the like, which is highly reliable, relatively easy to manufacture and at competitive costs.
This aim, these objects and others which will become apparent hereinafter are achieved by an aspirator for oil mists, particularly for machine tools and the like, characterized in that it comprises a substantially cylindrical external enclosure, inside which at least one impeller driven by an electric motor is accommodated, and a filtering module, which allows to filter the air aspirated by said impeller through said filtering module, characterized in that said enclosure is supported so that it can oscillate by a supporting frame in order to pass from a working position in which its axis is vertical with respect to a resting plane of said supporting frame to a working position in which its axis is horizontal with respect to said supporting plane.
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Hopkins Robert A.
Josif Albert
Losma S.r.l.
Modiano Guido
O'Byrne Daniel
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