Patent ID: 8118778
Filing Date: 2012-02-21
Classification: A61M,E05D,E05Y,H05K,Y10T

Abstract:
1. A peristaltic pump unit for medical infusion, the pump unit comprising: a peristaltic assembly; a counter surface or anvil facing said peristaltic assembly; a support for supporting, between said peristaltic assembly and said counter surface or anvil, a flexible resilient tube forming part of a medical fluid delivery line; and a driving mechanism operable to drive said peristaltic assembly, said mechanism incorporated in a housing; wherein said anvil or counter surface is provided by a door or cover hingedly connected with said housing so that in an open position of said door or cover, said anvil or counter surface is spaced from the peristaltic assembly to allow the introduction of such flexible resilient tube across the peristaltic assembly, or to allow the removal of such flexible resilient tube from the unit, and so that in a closed position of said door or cover, such flexible resilient tube extended across the peristaltic assembly will be positioned between the peristaltic assembly and said anvil or counter surface, characterized in that said door is readily non-destructively removable, e.g. for cleaning purposes, and replaceable, wherein the housing carries at least one journal or hinge pin and the door carries a complementary bearing arrangement, said bearing arrangement including a first part having an open-ended transverse slot termination in a bearing surface for said journal and a second part moveable with respect to said first part and which in a first position discloses said transverse slot to allow said journal to pass transversely through said slot into co-operation with said bearing surface, wherein said first part is fixed with respect to the door and said bearing surface of said first part is arcuate about an axis fixed with respect to the door about said axis, wherein said second part is movable into a second position in which it obstructs such transverse slot and provides a further bearing surface co-operating with said journal, said second part comprising a boss that is cylindrical about said axis, apart from the interruption due to said slot in the second part, said boss being journaled in a recess provided in a face of said first part, which recess, apart from the interruption due to said slot in the first part, is also cylindrical about said axis, and wherein said journal or hinge pin carried by said housing is coaxial with said bearing surfaces when the door is in position on the housing.