Gerald E Mcclain

US Patent:

20020130560, Sep 19, 2002

Filed:

Mar 19, 2001

Appl. No.:

09/812234

Inventors:

Stephen Botos - Pittsburgh PA, US
Albert Ciez - Murrysville PA, US
Gerald McClain - Pittsburgh PA, US

Assignee:

Aerotech, Inc. - Pittsburgh PA

International Classification:

H02K041/00

US Classification:

310/012000, 310/112000

Abstract:

A small footprint vertical lift and rotary positioning stage comprises a bottom wedge and a top wedge, a linear bearing between the bottom wedge and the top wedge, cam grooves and cam surfaces for constraining the motion of the top wedge in a vertical direction, a brushless linear motor for moving the bottom wedge back and forth along a horizontal path raising and lowering the top wedge, a circular table rotatably mounted on the top wedge and having a first cylindrical flange extending downward from a segment of the circumference of the circular table, a bracket mounted on the side of the top wedge, the bracket supporting an upwardly extending second cylindrical flange coaxial with the circular table and the first cylindrical flange, and a brushless curvilinear motor between the first and second cylindrical flanges.