System for sealing a pump cassette against a cassette control assembly

Patent metadata

Field	Value
Publication number	US-9957960-B2
Application number	US-201514840591-A
Country	US
Kind code	B2
Filing date	Aug 31, 2015
Priority date	Oct 30, 2003
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

A system and method for pumping fluid using a pump cassette is disclosed. The system includes a control assembly for operating the pump cassette. A force assembly having a movable member is capable of applying force to the pump cassette to press the pump cassette against the control assembly. The movable member may be an expandable member, such as a bladder.

First claim

The invention claimed is:

1. A system for pumping fluid comprising:
a pump cassette that includes a pumping chamber, an inlet, an outlet, one or more fluid channels, and a flexible membrane that can be displaced to pump fluid within the pump cassette;
a chassis on which a control assembly is attached, the control assembly having pneumatic channels for actuating the flexible membrane on the pump cassette;
a door hingedly mounted to the chassis, the door including a force assembly having a movable member for pressing the pump cassette against the control assembly; and
a cassette receptacle interposed between the door and the chassis configured to support the pump cassette and to move the pump cassette toward the control assembly as the door is closed or away from the control assembly as the door is opened; wherein
actuation of the force assembly sealingly presses the pump cassette against the control assembly upon closing the door and actuating the force assembly.

2. The system of claim 1 , wherein the force assembly is configured to apply a continuous force against the pump cassette.

3. The system of claim 1 , wherein the movable member is expandable, the expansion of which provides a force to press the pump cassette against the control assembly.

4. The system of claim 3 , wherein the movable member is pneumatically expandable.

5. The system of claim 1 , wherein the movable member comprises or is moved by an expandable bladder within the door.

6. The system of claim 5 , wherein the expandable bladder is pneumatically expandable.

Assignees

• Deka Products Lp

Inventors

• Lanigan Richard J
• Dale James D

Classifications

• F04B43/0009

  Special features · CPC title

• F04B49/22

  by means of valves (F04B49/03 takes precedence) · CPC title

• F04B53/22

  Arrangements for enabling ready assembly or disassembly · CPC title

• A61M2205/125

  with incorporated filters · CPC title

• A61M1/0213

  with isolated sections of the tube used as additive reservoirs · CPC title