Browse Prior Art Database

Hydraulic Positioning System

IP.com Disclosure Number: IPCOM000098925D
Original Publication Date: 1958-Dec-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Gilovich, PA: AUTHOR

Abstract

A piston adder is utilized in a hydraulic positioning system to control the valving of the output conduits of a port sensing piston which is connected to the load to be positioned.

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Hydraulic Positioning System

A piston adder is utilized in a hydraulic positioning system to control the valving of the output conduits of a port sensing piston which is connected to the load to be positioned.

The piston adder positions a valve which selectively opens one of a series of ports leading to a discharge manifold. Any port, when open, provides access from a corresponding port in the port sensing cylinder to the sump. Opening of any port not covered by the port sensing piston produces an imbalance of pressures on opposite faces of this piston to displace it in a direction to cover the open port. With the open port covered, the pressures on the piston are equalized and its movement stops.

Where a large number of different piston positions are required, the ports in the piston adder cylinder can be helically disposed around it and be selectively opened by a spool valve. This is connected to a screw nut for converting the linear motion of the piston adder output shaft to a rotary motion of the spool valve.

This apparatus produces a high ratio of controlled device movement to control mechanism movement, and also permits the conversion of binary position designations to decimal output positions.

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