Hydraulic pumping and switching apparatus
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United States of America Patent
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-
Feb 8, 1983
Grant Date -
N/A
app pub date -
Jul 10, 1980
filing date -
Jul 11, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A compact hydraulic pumping and switching apparatus capable of pumping a hydraulic liquid in connection with an operating liquid supply tank, a clean liquid tank and a dirty liquid reservoir tank in three different modes. One mode fills the supply tank and filters the liquid. A second merely filters liquid from the supply tank. And the third drains the supply tank without filtering the liquid. The apparatus comprises a carrier coupling together, into a single unit, a motor, a pump, a filter and a switching device. The switching device has two spherical stop cocks therein, each with a passage comprising two perpendicular portions. The switching device is connected to the supply tank at two connections and to the clean liquid tank and to the dirty liquid reservoir tank at one connection respectively.
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