| 摘要 |
Safe tank filling apparatus primarily for pesticide tank use, comprising a tank filling tube and a reverse flow prevention means associated therewith which includes a multiple valve assembly made up of a housing of three sections, two of which provide a flow through passageway to the filling tube and in which is located a one way valve assembly permitting flow through to the filling tube but not in reverse, and a vent valve assembly in the remaining housing section held in closed position in response to pressure within the housing, but openable in response to development of a partial vacuum condition within the housing.
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