Reciprocating hydraulic pump
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United States of America Patent
Stats
-
Dec 1, 1992
Grant Date -
N/A
app pub date -
Jul 8, 1991
filing date -
Jul 26, 1990
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A hydraulic pump comprises at least one reciprocating piston (2) sliding in a stationary cylinder (4), a non-return suction valve (12) arranged between a source of fluid under low pressure and a working chamber (10) defined in the cylinder (4), and a first non-return delivery valve (16) arranged between the working chamber (10) and an outlet chamber (14) for the fluid under high pressure. A conduit (24) connects the outlet chamber (14) and the working chamber (10), the piston (2) leaving this conduit (24) open at the end of the suction period and at the start of the delivery period and closing it during the rest of the cycle.
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