US Patent: 2,979,903 - Air-hydraulic apparatus


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US Patent: 2,979,903

Air-hydraulic apparatus

Patentee:

Leonard R. Beck (exact or similar names) - Villa Park, IL

USPTO Classifications:

60/541, 60/593, 91/4R, 91/516, 92/116, 92/151, 92/255

Tool Categories:

metalworking machines : metalworking machine mechanisms : hydraulic apparatus

Assignees:

Studebaker Hydraulic Products Co. - Melrose Park, IL

Manufacturer:

Studebaker Hydraulic Products Co. - Melrose Park, IL

Witnesses:

Unknown

Patent Dates:
Applied:	Jun. 21, 1957
Granted:	Apr. 18, 1961

Patent Pictures:

USPTO (New site tip)
Google Patents
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Vintage Machinery entry for Studebaker Machine Co.

Description:

The invention is an "air-hydraulic system for sequentially and automatically applying low and high hydraulic pressure to a utilization line to operate a desired hydraulic instrumentality such as a press, ram, vise or other hydraulically operated device. Another important object is the provision of a pneumatic means for rapidly actuating and restoring the hydraulically operating parts of said system..."