US Patent: 3,596,569 - Valve for a Closed-Loop Hydraulic Torque Amplifier


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US Patent: 3,596,569

Valve for a Closed-Loop Hydraulic Torque Amplifier

Patentee:

Jerry D. Wisbey (exact or similar names) - Loveland, Hamilton County, OH

USPTO Classifications:

91/180, 91/380, 91/448, 91/503

Tool Categories:

metalworking machines : metalworking machine mechanisms : hydraulic apparatus

Assignees:

Cincinnati Milling Machine Co. - Cincinnati, Hamilton County, OH

Manufacturer:

Not known to have been produced

Witnesses:

Unknown

Patent Dates:
Applied:	Jun. 03, 1969
Granted:	Aug. 03, 1971

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for Cincinnati Milling Machine Co.

Description:

Abstract:

A torque amplifier for translating a number of digital input pulses into a proportional angular displacement of a rotary piston and cylinder hydraulic motor. The input pulses drive an electric stepping motor which imparts a linear displacement to a valve. The valve displacement functions to meter fluid into the valve and consequently to the hydraulic motor. The hydraulic motor, through a coupling means, transmits its rotation back to the valve. The valve rotation, first, operates to sequentially distribute the fluid from said valve to the hydraulic motor cylinders, and second, provides a mechanical feedback to displace the valve back to its neutral position.