Flexible impeller pumps and disposable fluid flow circuits incorporating such pumps
AssigneeFenwal, Inc.
InventorsChristopher J. Wegener, Mark J. Brierton
Life of this patent
Estimating the term…
Abstract
A disposable fluid pump is provided with a housing including first and second faces, with a sidewall extending between the first and second faces. The housing defines a chamber, with an inlet and an outlet in fluid communication with the chamber. An impeller is rotatably mounted within the chamber and includes a plurality of flexible vanes. Such a pump may be incorporated into a disposable fluid flow circuit that is adapted to be mounted on a durable hardware for processing a fluid. In such a fluid flow circuit, the fluid pump may be integrated into a cassette of the circuit or, alternatively, the inlet and outlet of the fluid pump may be directly connected to fluid flow conduits of the circuit.
Claims21
A disposable fluid pump comprising:
- a housing including first and second faces and a sidewall extending between the first and second faces, the housing defining a chamber and an inlet and an outlet in fluid communication with the chamber;
- and
- an impeller rotatably mounted within the chamber and including a plurality of flexible vanes, wherein
- the impeller includes a rigid hub at least partially formed of a magnetized or ferromagnetic material, with the flexible vanes extending radially outwardly from the rigid hub,
- the impeller and housing are configured for rotation of the impeller via magnetic field, and
- the rigid hub does not include a shaft extending out of the housing.
A disposable cassette adapted for incorporation into a disposable fluid flow circuit, the disposable cassette comprising:
- a body including a topside, an underside, and an edge wall extending between the topside and the underside, the body defining a plurality of fluid flow paths and valve stations;
- and
- a fluid pump associated with the body and comprising
- a housing including first and second faces and a sidewall extending between the first and second faces, the housing defining a chamber and an inlet and an outlet each in fluid communication with the chamber and with a different one of the fluid flow paths defined by the body, and
- an impeller rotatably mounted within the chamber and including
- a rigid hub at least partially formed of a magnetized or ferromagnetic material, and
- a plurality of flexible vanes extending radially outwardly from the rigid hub, wherein the rigid hub does not include a shaft extending out of the housing.
A disposable fluid flow circuit adapted for cooperative mounting on a durable hardware for processing a fluid, the disposable fluid flow circuit comprising:
- a plurality of fluid flow conduits;
- a fluid processing chamber in fluid communication with at least two of the fluid flow conduits;
- at least one container in fluid communication with at least one of the fluid flow conduits and configured to receive at least a portion of a fluid;
- and
- a plurality of fluid pumps each operable to convey fluid through at least a portion of the fluid flow circuit and comprising
- a housing including first and second faces and a sidewall extending between the first and second faces, the housing defining a chamber and an inlet and an outlet each in fluid communication with the chamber and a different one of the fluid flow conduits, and
- an impeller rotatably mounted within the chamber and including
- a rigid hub at least partially formed of a magnetized or ferromagnetic material, and
- a plurality of flexible vanes extending radially outwardly from the rigid hub, wherein the rigid hub does not include a shaft extending out of the housing.
A disposable fluid pump comprising:
- a housing including first and second faces and a sidewall extending between the first and second faces, the housing defining a chamber and an inlet and an outlet in fluid communication with the chamber;
- and
- an impeller rotatably mounted within the chamber and including a plurality of flexible vanes, wherein
- the chamber and the impeller are present in a plane, with the flexible vanes of the impeller being rotatable in the plane and with the inlet and the outlet extending from the chamber to the sidewall at locations within the plane, and
- the first and second faces of the housing omit openings in fluid communication with the chamber.
A disposable cassette adapted for incorporation into a disposable fluid flow circuit, the disposable cassette comprising:
- a body including a topside, an underside, and an edge wall extending between the topside and the underside, the body defining a plurality of fluid flow paths and valve stations;
- and
- a fluid pump associated with the body and comprising
- a housing including first and second faces and a sidewall extending between the first and second faces, the housing defining a chamber and an inlet and an outlet each in fluid communication with the chamber and with a different one of the fluid flow paths defined by the body, and
- an impeller rotatably mounted within the chamber and including a plurality of flexible vanes, wherein the chamber and the impeller are present in a plane, with the flexible vanes of the impeller being rotatable in the plane and with the inlet and the outlet extending from the chamber to the sidewall at locations within the plane.
A disposable fluid flow circuit adapted for cooperative mounting on a durable hardware for processing a fluid, the disposable fluid flow circuit comprising:
- a plurality of fluid flow conduits;
- a fluid processing chamber in fluid communication with at least two of the fluid flow conduits;
- at least one container in fluid communication with at least one of the fluid flow conduits and configured to receive at least a portion of a fluid;
- and
- a plurality of fluid pumps each operable to convey fluid through at least a portion of the fluid flow circuit and comprising
- a housing including first and second faces and a sidewall extending between the first and second faces, the housing defining a chamber and an inlet and an outlet each in fluid communication with the chamber and a different one of the fluid flow conduits, and
- an impeller rotatably mounted within the chamber and including a plurality of flexible vanes, wherein the chamber and the impeller are present in a plane, with the flexible vanes of the impeller being rotatable in the plane and with the inlet and the outlet extending from the chamber to the sidewall at locations within the plane.
Dependencies are inferred from the claim text.