Patent ID: 7455151
Filing Date: 2008-11-25
Classification: B66B

Abstract:
1. A device for guiding movement of an elevator cab along a guide rail, comprising: a base; a roller mount moveably supported by the base and pivotable about an axis; a plurality of rollers supported on the roller mount, the rollers having roller axes that are a fixed distance apart and parallel to the axis; a biasing member that urges the roller mount to pivot about the axis in a direction that urges one of the rollers against a first side of the guide rail and another one of the rollers against an oppositely facing second side of the guide rail, the biasing member is operative to center the base relative to the guide rail; and at least one other member that is operative to resist movement of the base in a direction parallel to the roller axes, the at least one other member being rigidly secured against movement along the direction parallel to the roller axes, the at least one other member remaining fixed relative to the base along the direction parallel to the roller axes, the at least one other member comprising at least one of an insert supported on the roller mount or a roller supported by the base and having an axis of rotation that is perpendicular to axes of the plurality of rollers.