Low noise hydraulic power unit for an auto-hoist lift
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United States of America Patent
Stats
-
Feb 29, 2000
Grant Date -
N/A
app pub date -
Dec 8, 1997
filing date -
Dec 8, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A hydraulic power unit for an auto-hoist lift having improved noise characteristics and a more compact design. A motor and pump driving the power unit are located inside a hydraulic fluid reservoir to thereby reduce the amount of noise reaching the immediate vicinity of the power unit. The motor and pump are submerged in the hydraulic fluid to advantageously utilize the hydraulic fluid to cool the motor. The power unit may further incorporate a delay valve for reducing the start-up torque load on the motor, thereby allowing the motor to be sized for normal operating requirements rather than oversized for start-up requirements.
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