US Patent: 3,772,961
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| Hydrostatic Rotary Table
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Patentee:
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| William R. Siebert (exact or similar names) - Fond Du Lac, Fond Du Lac County, WI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 06, 1972 |
| Granted: |
Nov. 20, 1973 |
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Joel Havens
"Vintage Machinery" entry for Giddings & Lewis Manufacturing Co.
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Description: |
| Abstract:
An improved work carrying table for machine tools including pivotal and outer hydrostatic bearings for slidably supporting the table platen on its base and for providing precise indexing and rotation of the platen. The outer hydrostatic bearings each comprise a gib structure with a bearing surface situated between a way mounted on the platen and preload actuators recessed in one of the oppositely extending arms of a fixed preload member mounted on the base. Each preload actuator comprises a flexible bladder containing a rigid core plate, preloading being accomplished by pressurized hydraulic fluid pumped into the pressure chamber formed between the bladder and one surface of the core plate. The work carrying table also includes a plurality of manifolds mounted on the preload member and the base to efficiently direct the pressurized hydraulic fluid to the hydrostatic bearings and the actuators and a backlash-free, preloaded gear drive means to insure precision indexing of the platen. |
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