Rotary piston pump with pressure equalization chambers for the shaft split seals
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United States of America Patent
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Aug 14, 1984
Grant Date -
N/A
app pub date -
Dec 17, 1981
filing date -
Dec 18, 1980
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A rotary piston pump includes a casing and partitions within the casing defining an expansion chamber and with a gear and bearing chamber on one side of the expansion chamber and a bearing chamber on the other side. The partitions between the expansion chamber and the bearing and gear and bearing chambers are provided with passages for receiving shafts serving for the transmission of the rotary movement from gears to the pistons of the pumps. The passages between the chambers are provided with split seals which are composed of two parts separated by a pressure equalization chamber.
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