Patent ID: 7401412
Filing Date: 2008-07-22
Classification: B23Q

Abstract:
1. A Cartesian gantry system for mounting on a rigid base comprising: a) spaced and parallel linear Y-translation stages comprising linear bearings with associated linear motors, the linear bearings defining the Y-direction and constraining the motion of Y-carriages riding on the linear bearings, b) a bridge for supporting a linear X-translation stage comprising a linear bearing with an associated linear motor, the linear bearing defining the X-direction, being perpendicular to the linear bearings associated with Y-translation stages and constraining the motion of an X-carriage riding on the linear bearing, said bridge secured at each end to a Y-translation carriage by a bridge extension plate extending over a Y-carriage, c) an expansion joint between the bridge and a Y-carriage at only one end of the bridge comprising: