Bearing for umbilicus of a fluid processing system

Patent metadata

Field	Value
Publication number	US-2017100726-A1
Application number	US-201615376612-A
Country	US
Kind code	A1
Filing date	Dec 12, 2016
Priority date	Apr 22, 2015
Publication date	Apr 13, 2017
Grant date	—

Abstract

A fluid circuit for use with a fluid processing assembly, the fluid circuit comprising an umbilicus having a first end, a second end, an axis of rotation, and a cross-sectional circumference; a one-piece bearing secured to the umbilicus at a location between the first and second ends, the bearing having an axis of rotation and including an inner lumen which directly engages the umbilicus and includes a plurality of traction features, which bear against the umbilicus to prevent relative rotation of the bearing and the umbilicus; and the plurality of traction features comprising a first traction feature configured to engage the umbilicus at a first set of lengths between the first and second ends and a second traction feature configured to engage the umbilicus at a second set of lengths between the first and second ends.

First claim

1 . A fluid circuit for use with a fluid processing assembly, the fluid circuit comprising:
an umbilicus having a first end, a second end, an axis of rotation, and a cross-sectional circumference; a one-piece bearing secured to the umbilicus at a location between the first and second ends, the bearing having an axis of rotation and including an inner lumen which directly engages the umbilicus and includes a plurality of traction features, which bear against the umbilicus to prevent relative rotation of the bearing and the umbilicus; and wherein the plurality of traction features comprises a first traction feature which comprises a first plurality of projections disposed at a first rotational angle about the axis of rotation, the first plurality of projections defining all projections disposed on the first traction feature, and is configured to engage the umbilicus at a first set of lengths between the first and second ends, and a second traction feature which comprises a second plurality of projections disposed at a second rotational angle about the axis of rotation, the second plurality of projections defining all projections disposed on the second traction feature, and is configured to engage the umbilicus at a second set of lengths between the first and second ends.

2 . The fluid circuit of claim 1 , wherein the traction features are oriented transversely to the axis of rotation of the bearing and umbilicus.

3 . The fluid circuit of claim 1 , wherein the cross section of the umbilicus at each length within the first and/or second set has a generally offset ovular shape when engaged by the traction features.

4 . The fluid circuit of claim 1 , wherein the traction features are disposed on tabs circumferentially disposed about the axis of rotation of the bearing.

5 . The fluid circuit of claim 4 , further comprising a third traction feature which comprises a third plurality of projections disposed at a third rotational angle about the axis of rotation, the third plurality of projections defining all projections disposed on the third traction feature, and is configured to engage the umbilicus at a third set of lengths between the first and second ends.

6 . The fluid circuit of claim 1 , wherein a third traction feature is disposed diametrically opposed to the first traction feature about the cross-section of the umbilicus between the first and second ends.

7 . The fluid circuit of claim 1 , wherein the umbilicus comprises material that includes a thermoplastic elastomer.

8 . A fluid circuit for use with a fluid processing assembly, the fluid circuit comprising:
an umbilicus having a first end, a second end, an axis of rotation, and a cross-sectional circumference; a one-piece bearing secured to the umbilicus at a location between the first and second ends, the bearing having an axis of rotation and including an inner lumen which directly engages the umbilicus and includes a plurality of tabs disposed about the axis of rotation of the umbilicus; wherein the plurality of tabs comprises:
a first tab, disposed at a first rotational angle about the axis of rotation, having a first set of traction features disposed at a first set of lengths between the first and second ends, the first set of traction features defining all traction features disposed on the first tab, wherein the first tab is configured to engage the umbilicus at a first arrangement of compression locations between the first and second ends of the umbilicus;
a second tab disposed at a second rotational angle about the axis of rotation, having a second set of traction features disposed at a second set of lengths between the first and second ends, the second set of traction features defining all traction features disposed on the second tab, wherein the second tab is configured to engage the umbilicus at a second arrangement of compression locations between the first and second ends of the umbilicus;
a third tab disposed at a third rotational angle about the axis of rotation, having a third set of traction features disposed at the first set of lengths between the first and second ends, the third set of traction features defining all traction features disposed on the third tab, wherein the third tab is configured to engage the umbilicus at the first arrangement of compression locations between the first and second ends of the umbilicus; and
a fourth tab, disposed at a fourth rotational angle about the axis of rotation, having a fourth set of traction features disposed at the second set of lengths between the first and second ends, the fourth set of traction features defining all traction features disposed on the fourth tab, wherein the fourth tab is configured to engage the umbilicus at the second arrangement of compression locations between the first and second ends of the umbilicus.

9 . The fluid circuit of claim 8 , wherein the traction features are oriented transversely to the axis of rotation of the bearing and umbilicus.

10 . The fluid circuit of claim 8 , wherein the second and fourth tabs comprise no traction features configured to engage the umbilicus.

11 . The fluid circuit of claim 8 , wherein each compression location within the first and/or second arrangement of compression locations of the umbilicus has a generally offset ovular cross-sectional shape when engaged by the traction features.

12 . The fluid circuit of claim 8 , wherein the tabs are disposed circumferentially about the axis of rotation of the bearing.

13 . The fluid circuit of claim 8 , wherein the first and third tabs are disposed diametrically opposed to each other about the cross-section of the umbilicus, and the second and fourth tabs are disposed diametrically opposed to each other about the cross-section of the umbilicus.

14 . The fluid circuit of claim 8 , wherein the umbilicus comprises material including a thermoplastic elastomer.

15 . A fluid circuit for use with a fluid processing assembly, the fluid circuit comprising:
an umbilicus having a first end, a second end, an axis of rotation, and a generally circular cross-section having a circumference; a one-piece bearing secured to the umbilicus at a location between the first and second ends, the bearing having an axis of rotation and including an inner lumen which directly engages the umbilicus and includes a plurality of traction features, which bear against the umbilicus at compression locations to prevent relative rotation of the bearing and the umbilicus; wherein the plurality of traction features comprises:
a first traction feature which comprises a first plurality of projections disposed at a first rotational angle about the axis of rotation, the first plurality of projections defining all projections disposed on the first traction feature, and is configured to engage the umbilicus at a first arrangement of compression locations at a first set of lengths between the first and second ends of the umbilicus;
a second traction feature which comprises a second plurality of projections disposed at a second rotational angle about the axis of rotation, the second plurality of projections defining all projections disposed on the second traction feature, and is configured to engage the umbilicus at a second arrangement of compression locations at a second set of lengths between the first and second ends of the umbilicus;
a third traction feature which comprises a third plurality of projections disposed at a third rotational angle about the axis of rotation, the third plurality of projections defining all projections disposed on the third traction feature, and is configured to engage the umbilicus at a third arrangement

Assignees

• Fenwal Inc

Inventors

• Manzella Salvatore
• Pieper Gregory G

Classifications

• B04B5/0442 Primary

  with means for adding or withdrawing liquid substances during the centrifugation, e.g. continuous centrifugation · CPC title

• A61M1/3693

  using separation based on different densities of components, e.g. centrifuging · CPC title

• B04B9/12 Primary

  Suspending rotary bowls {; Bearings; Packings for bearings} · CPC title

• F16C2316/10

  in medical appliances, e.g. in diagnosis, dentistry, instruments, prostheses, medical imaging appliances · CPC title

• F16C17/12

  characterised by features not related to the direction of the load · CPC title