Rotary centrifuge bowl and seal for blood processing
First Claim
Patent Images
1. In a rotary centrifuge bowl having a non-rotatable header coupled by a rotary seal to a bowl body, the improvement comprising:
- a) a dynamic rotary seal having;
(i) an upper non-rotatable bearing surface ring member; and
(ii) a lower rotatable bearing surface ring member formed of a ceramic, one planar side of which faces said upper ring member; and
(iii) an adapter ring member formed of blood compatible plastic and adhesively bonded to a side of said lower ring member opposite said planar side, said adapter ring being directly connected to a neck of said bowl body about the periphery thereof and including projections integrally formed on a surface of said adapter ring member to which said lower ring member is bonded and wherein the adapter ring is a molded piece and the projections are integrally formed thereon and wherein a side of the lower ring member opposite said planar side is formed of at least three portions;
(i) a first portion which extends radially from the inner periphery of the lower ring member;
(ii) a second portion which extends vertically downward toward the interior of the bowl body; and
(iii) a third portion which extends radially outwardly from the second portion to the outer periphery of the lower ring member.
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Accused Products
Abstract
A seal for a blood processing centrifuge bowl which is formed of a dynamic rotary seal and a static seal. The dynamic rotary seal is formed of an upper graphite or carbon non-rotating ring member and a lower two-piece rotatable ring member formed of a ceramic bearing surface bonded by adhesive to a plastic adapter ring. The static seal is comprised of an elastomeric diaphragm formed over the upper ring member and secured thereto by a plastic retaining ring.
196 Citations
12 Claims
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1. In a rotary centrifuge bowl having a non-rotatable header coupled by a rotary seal to a bowl body, the improvement comprising:
a) a dynamic rotary seal having; (i) an upper non-rotatable bearing surface ring member; and (ii) a lower rotatable bearing surface ring member formed of a ceramic, one planar side of which faces said upper ring member; and (iii) an adapter ring member formed of blood compatible plastic and adhesively bonded to a side of said lower ring member opposite said planar side, said adapter ring being directly connected to a neck of said bowl body about the periphery thereof and including projections integrally formed on a surface of said adapter ring member to which said lower ring member is bonded and wherein the adapter ring is a molded piece and the projections are integrally formed thereon and wherein a side of the lower ring member opposite said planar side is formed of at least three portions; (i) a first portion which extends radially from the inner periphery of the lower ring member; (ii) a second portion which extends vertically downward toward the interior of the bowl body; and (iii) a third portion which extends radially outwardly from the second portion to the outer periphery of the lower ring member. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A disposable blood processing set comprised of:
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a) a blood processing receptacle bag; b) a rotary centrifuge bowl having a non-rotatable input port and output port; c) blood compatible tubing connecting the output port to the bag and for connecting the input port to a source of whole blood and wherein said bowl includes a rotatable bowl body and a dynamic rotary seal coupling said bowl body to said input and output ports, said dynamic rotary seal having; (i) an upper non-rotatable bearing surface ring member; and (ii) a lower rotatable ceramic bearing surface ring member, one planar side of which faces said upper ring member; and (iii) an adapter ring member formed of blood compatible plastic and adhesively bonded to a side of said lower ring member opposite said planar side, said adapter ring being directly connected to a neck formed around an aperture of said bowl body about the periphery thereof and further including projections integrally formed on a surface of said adapter ring member to which said upper ring member is bonded and wherein the adapter ring is a molded piece and the projections are integrally formed thereon and wherein a side of the lower ring member opposite said planar side is formed of at least three portions; (i) a first portion which extends radially from the inner periphery of the lower ring member; (ii) a second portion which extends vertically downward toward the interior of the bowl body; and (iii) a third portion which extends radially outwardly from the second portion to the outer periphery of the lower ring member. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification