Gas separation: apparatus – Solid sorbent apparatus – Plural diverse separating means
Patent
1996-05-23
1998-08-11
Smith, Duane S.
Gas separation: apparatus
Solid sorbent apparatus
Plural diverse separating means
55DIG17, 96147, 96149, B01D 5302
Patent
active
057922454
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND AND SUMMARY OF THE INVENTION
The invention relates to a drying cartridge for vehicle compressed-air brake systems.
In the case of drying cartridges of the concerned type (for example, German Patent Document DE-PS 32 32 742) which, according to their use, are called "disposable cartridges", a face cover is fastened to the underside of a pot, for example, by a flanged connection. The face cover has a threaded element in the center for fixing the cartridge on a dryer casing. Devices are provided which prevent the granulates or drying agent from escaping through the center to the outside. Thus, the drying cartridge can be handled without special measures; that is, after being unscrewed from the dryer casing, it can be stored intermediately or be used as a disposable part. The face covers used for such drying cartridges or their flanged connections with the pot of the drying cartridge result in high expenditures with respect to the material and with respect to the thickness of the material. Because of the unreleasable flanged connection, a separate disposal of the filter material and the material of the granulates and the reuse of the other piece parts situated in the drying cartridge is possible only by disproportionately high expenditures. The drying cartridge is therefore only used as a disposable part.
During the manufacturing of drying cartridges of the concerned type, the demands for an environmental compatibility which is as extensive as possible become increasingly important. Thus, because of the long-term effect of rust, it is undesirable to store contaminated drying cartridges, that is, drying cartridges enhanced with oil particles, in large numbers as disposable parts and to take them to a waste dump.
Based on the above, it is an object of the invention to develop a drying cartridge of the concerned type in such a manner that a simplified handling on the vehicle is permitted. It is to be ensured that the drying cartridge or its components, after being detached from the dryer casing, can be handled as a constructional unit and can be supplied to a recycling without any escaping of the filter material or granulate material from the interior of the cartridge.
By using an inner pot which, contains the drying agent and which can be inserted into an outer pot as a preassembled unit, a simple exchange at the vehicle is possible. That is, the inner pot with the preliminary filter situated in it and with the granulate material, after an extended use, can be replaced by a new inner pot with a new filling without demounting of the inner pot with the problems of the escaping of the granulate material and of the relaxing of the pressure spring. Since the pressure spring, in its tensioned position, remains in the interior of the inner pot, no special measures are required for relaxing the spring. After a new inner pot is inserted into the outer pot, the mounting of the cartridge on the air dryer casing can be carried out in a simple manner by the screw which centrally penetrates the cartridge. In this fashion, a high proportion of the components of the cartridge can be reused; the inner pot can be recycled; that is, important components of the inner pot can be used again after the exchange of the preliminary filter and the drying material.
The division of the interior of the inner pot into two chambers is also very advantageous because the outer flow-through space between the exterior wall of the inner pot and the interior wall of the outer pot which is customary in the case of conventional drying cartridges will now be absent. That is, the outer pot is provided only for the flush accommodation of the inner pot and for the mounting on the dryer casing.
Advantageous developments and further developments are indicated in additional claims.
In the following, the invention is explained by means of embodiments with reference to the attached drawing.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a sectional view, which is cut in half, of the drying cartridge according to the invention; and
FIG. 2 is a view,
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Hatz Wolfgang
Tschewik Herbert
Unger Hans
Knorr Bremse Systeme Fur Nutzfahrzeuge GmbH
Smith Duane S.
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