Elevator – industrial lift truck – or stationary lift for vehicle – Having specific load support drive-means or its control – Includes fluid supporting ram in drive-means
Patent
1998-06-26
2000-02-22
Kramer, Dean J.
Elevator, industrial lift truck, or stationary lift for vehicle
Having specific load support drive-means or its control
Includes fluid supporting ram in drive-means
60581, B66B 904
Patent
active
060269340
ABSTRACT:
A hydraulic lift system including a master cylinder, a plurality of slave cylinders, a yoke interconnecting the master and slave cylinders, and a plurality of lift cylinders each in fluid communication with one of the slave cylinders. The extension of the master cylinder moves the yoke, which causes the simultaneous coordinated movement of the slave cylinders. Equal volumes of hydraulic fluid are forced out of, or permitted into, each of the slave cylinders and into, or out of, the lift cylinders, thus extending the lift cylinders in simultaneous coordinated movement. When the cylinders are vertically arranged to support, for example, a work surface, the work surface remains level throughout the range of vertical movement.
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Kramer Dean J.
Monarch Hydraulics, Inc.
Tran Thuy V.
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