US Patent: 2,928,290 - Hydraulic Gear Shifting Control


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US Patent: 2,928,290

Hydraulic Gear Shifting Control

Patentees:

Everett E. Hosea (exact or similar names) - Kaukanuna, Outagamie County, WI

Adrian T. Godschalx (exact or similar names) - Appleton, Outagamie County, WI, WI

USPTO Classifications:

318/443, 477/19, 74/339, 74/364, 74/365, 74/DIG.2

Tool Categories:

metalworking machines : metalworking machine mechanisms : hydraulic apparatus

Assignees:

Giddings & Lewis Machine Tool Co. - Fond Du Lac, Fond Du Lac County, WI

Manufacturer:

Not known to have been produced

Witnesses:

Unknown

Patent Dates:
Applied:	Aug. 30, 1956
Granted:	Mar. 15, 1960

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for Giddings & Lewis Manufacturing Co.

Description:

Claim:

The present invention relates to controls for assuring the smooth engagement of shiftable power transmission elements such as positive tooth clutches or the like. More particularly the invention relates to a control system for a hydraulically shiftable speed change mechanism that is especially useful in machine tools.