Abstract: A transport device includes rollable elements configured to both support and move the transport device on a surface; and a drive mechanism for driving the rollable elements. A load bearing mechanism is movable between a lowered position adjacent to the surface and at least one raised position, and is supported by a support frame having a front wall, two side walls and an open back. The load bearing mechanism is mounted such that the side walls and front wall of the support frame extend around the load bearing mechanism. An actuator is mounted on one of the walls of the support frame for controllably raising and lowering the load bearing mechanism and the rollable elements are mounted adjacent to the side walls of the support frame and support the two side walls at four locations, such that a center of gravity is between the four locations.

Abstract: A vacuum pump comprises an inlet flange for connecting to a vacuum chamber, where the inlet flange comprises a plurality of apertures for receiving a plurality of protruding fixing elements extending from the vacuum chamber. The protruding fixing elements comprise an enlarged retaining portion at an end remote from the vacuum chamber and a fastener receiving portion having at least one radial dimension that is smaller than a corresponding dimension of the enlarged retaining portion. A fastening mechanism is provided that comprises a plurality of slots each extending from a same side of a plurality of apertures. The fastening mechanism is configured to be rotatable between a mounting position in which the apertures are aligned with the protruding fixing elements and a sealing position in which the slots are aligned with the protruding fixing elements.