Infusion device with disposable elements

• US 20050013698A1
• Filed: 05/26/2004
• Published: 01/20/2005
• Est. Priority Date: 05/17/1988
• Status: Abandoned Application

• Current Assignee: David Lyle Davis
• Original Assignee: David Lyle Davis
• Inventors: Davis, David Lyle
• Application Number:
  US10/854,025
• Publication Number:
  US 20050013698A1
• Time in Patent Office: Days
• US Class Current: 417/45
• CPC Class Codes: A61M 2205/6018 providing set-up signals for the apparatus configuration
• CPC Class Codes: A61M 2205/6072 Bar codes
• CPC Class Codes: A61M 5/142 Pressure infusion, e.g. using pumps
• CPC Class Codes: A61M 5/16831 Monitoring, detecting, signalling or eliminating infusion flow anomalies low-level float-valves causing cut-off A61M5/40; indicating or recording presence, absence or direction of flow in general G01P13/0066
• CPC Class Codes: A61M 5/16854 by monitoring line pressure
• CPC Class Codes: F04B 2203/0207 Torque
• CPC Class Codes: F04B 43/08 having tubular flexible members F04B43/12 takes precedence
• CPC Class Codes: F04B 43/082 the tubular flexible member being pressed against a wall by a number of elements, each having an alternating movement in a direction perpendicular to the axes of the tubular member and each having its own driving mechanism
• CPC Class Codes: F04B 49/065 and making use of computers

Abstract

An infuision device with a disposable administration set which is inexpensive to manufacture. In the preferred embodiment of the present invention the disposable administration set has a plurality of elongated cam followers connected to a plate assembly, wherein the cam followers are displaced in a predetermined sequence and forced against a delivery tube by cam means driven by rotary drive means. The disposable administration set is injection molded as a single integral piece. The disposable administration set includes adjustment spacers disposed between the plate assembly and the cam followers which adjust the distance between them to keep the device accurate. In the preferred embodiment of the present invention the cam means are configured to provide fluid delivery at a consistent and uniform rate.

Claims

1. An administration set for use with a pumping mechanism having an actuator cam, comprising:

a delivery tube;

at least one follower disposed adjacent to said delivery tube;

a follower retainer defining a support surface for supporting said at least one follower in a standby position not pushing against said delivery tube, wherein said actuator cam directs said at least one follower into an operating position pushing against said delivery tube when said administration set is inserted into said pumping mechanism.

2. The administration set of claim 1, additionally comprising a tube retaining plate for supporting said delivery tube, wherein said follower retainer and said tube retaining plate are molded as a single piece.

3. A device for pumping fluid, comprising:

a disposable administration set comprising at least one follower and a delivery tube disposed adjacent said follower;

a pumping mechanism comprising an actuator contacting said follower to force said follower to squeeze a portion of said delivery tube;

a housing defining a shoulder for supporting said disposable administration set; and

a spring biasing said disposable administration set against said shoulder.

4. The device of claim 3, additionally comprising a ball positioned between said spring and said disposable administration set.

5. The device of claim 3, said housing additionally comprising a channel, said shoulder being defined by a portion of said channel.

6. The device of claim 3, wherein said spring is selected so as to deform upon sliding said disposable administration set into said housing and to resist deforming in response to said squeezing of said delivery tube.