DEFORMABLE VALVE MECHANISM FOR CONTROLLING FLUID DELIVERY

• US 20110282276A1
• Filed: 05/13/2010
• Published: 11/17/2011
• Est. Priority Date: 05/13/2010
• Status: Active Grant

• Current Assignee: Carefusion 303 Incorporated (Becton, Dickinson & Co)
• Original Assignee: Carefusion 303 Incorporated (Becton, Dickinson & Co)
• Inventors: Abal, Daniel
• Granted Patent: US 9,011,370 B2
• Time in Patent Office: Days
• US Class Current: 604/33
• CPC Class Codes: A61M 2039/226 Spindles or actuating means
• CPC Class Codes: A61M 2205/0216 Materials providing elastic properties, e.g. for facilitating deformation and avoid breaking
• CPC Class Codes: A61M 2205/128 with incorporated valves
• CPC Class Codes: A61M 39/22 Valves or arrangement of valves A61M39/02, A61M39/0247, A61M39/16 take precedence; regulating valves in infusion systems A61M5/16881; in devices worn by the patient for the reception of urine, faeces, catamenial or other discharge, or in colostomy devices A61F5/4405
• CPC Class Codes: A61M 5/14212 Pumping with an aspiration and an expulsion action
• CPC Class Codes: A61M 5/16813 by controlling the degree of opening of the flow line
• CPC Class Codes: A61M 5/16827 controlling delivery of multiple fluids, e.g. sequencing, mixing or via separate flow-paths infusion of multiple fluids without using a controller A61M5/1407
• CPC Class Codes: A61M 5/16881 Regulating valves on-off valves, e.g. clamps A61M39/28
• CPC Class Codes: F16K 1/38 of conical shape
• CPC Class Codes: F16K 7/12 with flat, dished, or bowl-shaped diaphragm
• CPC Class Codes: F16K 7/16 the diaphragm being mechanically actuated, e.g. by screw-spindle or cam

Abstract

A valve for controlling delivery of fluid includes a valve seat comprising a fluid inlet, a fluid outlet and a conical well having an opening, a beveled surface and a bottom, and a valve membrane comprising a conical portion having a base and a tip. The conical portion is configured to fit within the conical well of the valve seat. The valve membrane is configured to fluidly connect the fluid inlet to the fluid outlet when the valve membrane is in an undeformed position and fluidly disconnect the fluid inlet from the fluid outlet when the valve membrane is in a radially deformed position.

Claims

1. A valve in a fluid delivery system, comprising:

a valve seat comprising a fluid inlet, a fluid outlet and a conical well having an opening, a beveled surface and a bottom; and

a valve membrane comprising a conical portion having a base and a tip, the conical portion configured to fit within the conical well of the valve seat, the valve membrane configured to fluidly connect the fluid inlet to the fluid outlet when in an undeformed position and fluidly disconnect the fluid inlet from the fluid outlet when in a radially deformed position.

2. The valve of claim 1, wherein:

the tip of the conical portion is separated from the bottom of the conical well by a gap when the valve membrane is in the undeformed position; and

wherein the tip of the valve membrane touches the bottom of the conical well when the valve is in the radially deformed position.

3. The valve of claim 2 wherein the valve membrane comprises a pushable portion such that pushing against the pushable portion by an external force puts the valve into the radially deformed position.

4. The valve of claim 2, wherein the conical portion is separated from the conical well by a clearance when the valve membrane is in the undeformed position and the conical portion touches the conical well when the valve membrane is in the radially deformed position.

5. The valve of claim 1 wherein:

the valve seat comprises a rigid material; and

the valve membrane comprises an elastomeric material.

6. The valve of claim 5, wherein the elastomeric material comprises silicone.

7. The valve of claim 1, wherein a disposable portion of an intravenous fluid pump comprises the valve.

8. The valve of claim 1, wherein a positive displacement pump comprises a first one of the valve on a fluid intake side and a second one of the valve on a fluid delivery side.

9. The valve of claim 1, further comprising a retaining cap, the retaining cap provided to fit over the valve seat to secure the valve membrane in place during operation of the valve.

10. A fluid delivery system for delivering fluid from a fluid source to a patient, comprising:

a durable portion comprising an actuator mechanism;

a disposable portion comprising a first valve fitted on the durable portion to allow the actuator mechanism to exert a pushing force on an actuation area of the first valve;

the first valve coupled to a first fluid inlet and a fluid outlet such that the first valve fluidly connects the first fluid inlet and the fluid outlet when the pushing force is not applied and deforms radially to fluidly disconnects the first fluid inlet from the fluid outlet when the pushing force is applied to the actuation area of the first valve.

11. The fluid delivery system of claim 10, further comprising:

a second valve coupled to a second fluid inlet and a fluid outlet such that the second valve fluidly connects the second fluid inlet and the fluid outlet when the pushing force is not applied and deforms radially to fluidly disconnects the second fluid inlet from the fluid outlet when the pushing force is applied to the actuation area of the second valve.

12. The fluid delivery system of claim 11, wherein the actuator mechanism is configured to control a ratio of fluid delivered from the first fluid inlet to the fluid outlet and from the second fluid inlet to the fluid outlet by controlling a timing of application of pushing force on the first valve and the second valve.

13. A valve for controlling delivery of fluid between a fluid inlet and a fluid outlet, comprising:

a first portion having a chamber fluidly connected to the fluid inlet and the fluid outlet;

a second portion having a protruding portion fitted within the chamber such that fluid can flow from the fluid inlet to the fluid outlet through the chamber around the protruding portion when the protruding portion is not deformed and fluid cannot flow from the fluid inlet to the fluid outlet through the chamber when the protruding portion is deformed to touch at least a portion of a wall of the chamber.

14. The valve of claim 13, wherein the protruding portion is conically shaped and wherein the portion of the wall of the chamber has a beveled surface corresponding to the conically shaped protruding portion.

15. The valve of claim 14, wherein the first portion comprises a rigid material and the second portion comprises an elastomeric material.