Abstract: A tube cassette (22) for receiving infusion tubing is shaped to define a locking surface (26). A pump (20) includes a latch (28) which engages with the locking surface and locks the cassette in a preset position with respect to the pump. A mechanical stop (38) in the pump stops motion of the cassette in a first direction, such that the cassette has moved past the preset position. Until motion of the cassette is stopped by the mechanical stop, the latch allows motion of the cassette past the preset position in the first direction. The latch automatically moves from an open position to a cassette-withdrawal-inhibiting position upon engagement of the latch with the locking surface, and subsequently locks the cassette in the preset position by pushing the cassette in a second direction, from past the preset position to the preset position. Other applications are also described.

Abstract: An apparatus for moving a large ship from water to a pre-determined area for repair thereof comprising: lifting means for lifting the ship out of the water; guidance means to guide the ship while it is on the lifting means to the pre-determined repair area; and means for enabling the lifting means to be emplaced on the ship; said enabling means having an entrance.