US Patent: 3,871,721
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| Pre Loaded Hydrostatic Way Bearing
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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: |
Aug. 13, 1973 |
| Granted: |
Mar. 18, 1975 |
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Joel Havens
"Vintage Machinery" entry for Giddings & Lewis Manufacturing Co.
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Description: |
| Abstract:
Preloaded hydrostatic way bearing for use with a work carrying table for machine tools and the like to slidably support the table's platen on its base and for providing precise indexing and rotation of the platen. Two of the hydrostatic bearings individually comprise a gib structure with a bearing surface situated between a way mounted on the platen and preload actuators recessed in one of oppositely extending arms of a pie-shaped preload member mounted on the base. Each pre-load actuator comprises a flexible bladder with an internal slot defining a pressure chamber and which may include a rigid core plate held within the slot, preloading being accomplished by pressurized hydraulic fluid pumped into the pressure chamber formed between the bladder and at least one side of the core plate. Manifolds are provided to direct the pressurized hydraulic fluid to the hydrostatic bearings and the actuators. |
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