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US 4,169,585 AGranted
Workpiece holder
AssigneeCaterpillar Tractor Co.
InventorRonald E. Dennis
Life of this patent
Estimating the term…
Abstract
A workpiece holder includes a plurality of elements movable radially outwardly into engagement with an inner surface of an annular workpiece in response to movement of a cam.
Claims12
A workpiece holder for supporting an annular workpiece having an inner surface, comprising:
- a support structure having a longitudinal axis;
- a plurality of elements having inner and outer end portions and being slidably maintained by said support structure;
- a cam engaging said inner end portions of said elements and being movable along the longitudinal axis between a first position at which the elements are at a retracted position and a second position at which the elements are extended into engagement with said inner surface of the workpiece;
- means for moving the cam between said first and second position;
- and
- a bearing rotatably connecting said cam moving means to said cam.
3 more elements
A workpiece holder for supporting an annular workpiece having an inner surface, comprising:
- a support structure having a longitudinal axis;
- a plurality of elements having inner and outer end portions and being slidably maintained by said support structure;
- a cam engaging said inner end portions of said elements and being movable along the longitudinal axis between a first position at which the elements are at a retracted position and a second position at which the elements are extended into engagement with said inner surface of the workpiece;
- means for moving the cam between said first and second positions;
- a mounting frame;
- means for rotatably connecting the support structure to the mounting frame;
- means for rotating the support structure relative to the mounting frame;
- and
- a bearing rotatably connecting said cam moving means to said cam.
6 more elements
Dependencies are inferred from the claim text.