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US 4,211,512 AGranted
Rotary table with ballscrew drive
AssigneeKearney & Trecker Corporation
InventorFrank Zankl
Life of this patent
Estimating the term…
Abstract
A rotary table is driven by a pair of perpendicularly disposed linear slides which are each driven by a ballscrew drive. One of the linear slides is mounted on the movable member of the other linear slide and is coupled to the rotary table by a crank stud. The linear slides are driven at speeds which vary in accordance with the sine and cosine of the table angle to translate the linear slide motion into rotary motion.
Claims6
A rotary table drive comprising:
- a frame;
- a tabel journaled to said frame for rotation about a first axis;
- a first linear slide slidably mounted on said frame for movement along a second axis perpendicular to said first axis;
- a second linear slide slidably mounted on said first linear slide for movement along a third axis perpendicular to both said first and second axes;
- a rotary crank coupling said second linear slide to said table;
- and
- means for simultaneously moving said first and second linear slides at variable linear speeds to cause rotary movement of said table.
4 more elements
Dependencies are inferred from the claim text.