Stress-bearing umbilicus for a compact centrifuge

B - Operations – Transporting – 04 – B

Patent

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Details

B04B 11/00 (2006.01) A61K 35/14 (2006.01) B04B 5/04 (2006.01) F02B 75/02 (2006.01)

Patent

CA 2155639

An umbilicus (24) conveys fluid between a stationary body and a rotating body in a small, compact operating environment. The umbilicus comprises an elongated body (200) including a proximal end, a distal end, and a middle region between the proximal and distal ends. A first support block (204) is attached to the proximal end. A second support block (206) is attached to the distal end. The first support block (204) includes a strain relief sleeve (212). The umbilicus is otherwise free of any other strain relief sleeve. A thrust bearing member (214) in the middle region spaced apart from the strain relief sleeve (212) and the distal end. The umbilicus is otherwise free of any other thrust bearing member. The thrust bearing member (214) has an inner annular body (218), an outer annular body (216) about the inner annular body (218), and an array of ball bearings (220) between the inner and outer annular bodies. The ball bearings (220) support the inner annular body (218) for rotation relative to the outer annular body (216).

Un tube de raccordement (24) transporte du fluide entre un corps stationnaire et un corps en rotation, fonctionnant dans un espace restreint. Le tube de raccordement comporte un corps allongé (200) avec une extrémité proximale, une extrémité distale et une région médiane entre les extrémités proximale et distale. Un premier bloc de support (204) est fixé à l'extrémité proximale. Un secon bloc de support (206) est fixé à l'extrémité distale. Le premier bloc de support (204) comporte un manchon d'allègement des contraintes (22). Par ailleurs, le tube de raccordement est pourvu d'autres manchons d'allègement des contraintes. Un élément de palier de butée (214) est disposé dans la région médiane à une certaine distance du manchon d'allègment des contraintes (212) et de l'extrémité distale. Le tube de raccordement est par ailleurs exempt de tout autre élément de palier de butée. L'élément de palier de butée (214) a un corps annulaire interne (218), un corps annulaire externe (216) autour du corps annulaire interne et un agencement de paliers de billes (220) ente les corps annulaires interne et externe. Les paliers à billes (220) supportent le corps annulaire interne (218) pour lui permettre de tourner par rapport au corps annulaire externe (216).

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