Reusable pressure plates and methods

• US 5,823,746 A
• Filed: 08/14/1996
• Issued: 10/20/1998
• Est. Priority Date: 08/14/1996
• Status: Expired due to Term

• Current Assignee: Smiths Medical ASD, Inc. (Smiths Group International Holdings Ltd.)
• Original Assignee: Sims Deltec, Inc. (ICU Medical Incorporated)
• Inventors: Johnson, Jay Gregory
• Primary Examiner(s): FREAY, CHARLES GRANT
• Application Number:
  US08/702,384
• Time in Patent Office: 797 Days
• Field of Search: 417/53, 417/477.1, 417/477.2, 417/572, 417/474, 417/234, 417/360, 417/478, 417/479, 604/151, 604/153, 604/264, 604/280, 128/DIG. 12, 128/DIG. 13, 137/343, 137/565
• US Class Current: 417/53
• CPC Class Codes: A61M 5/14228 with linear peristaltic action, i.e. comprising at least three pressurising members or a helical member
• CPC Class Codes: F04B 43/08 having tubular flexible members F04B43/12 takes precedence
• CPC Class Codes: F04B 53/22 Arrangements for enabling ready assembly or disassembly

Abstract

This invention relates to reusable pressure plates designed to position tubing along a tubing support surface to facilitate peristaltic pumping of fluids from a fluid reservoir to a patient. Preferred embodiments of this invention include reinforced pump anchors to securably but releasably affix the pressure plate to the control module portion of an infusion system and cantilevered spring support to maintain pump accuracy and enabling the use of more durable materials for pressure plate manufacture.

Claims

1. A pressure plate mountable to a control module for positioning a tubing adjacent to a plurality of tube engaging members of a pumping mechanism, the pressure plate comprising:

a tubing support surface;

an anchor for mounting the tubing support surface to the control module located on the tubing support surface, the anchor including a reinforcement; and

two hooks for mounting the tubing support surface to the control module, wherein the hooks each include a cantilevered spring member extending along the tubing support surface.

2. The pressure plate of claim 1, wherein the anchor is closed loop-shaped.

3. The pressure plate of claim 1, wherein the anchor is hook-shaped.

4. A pressure plate mountable to a control module for positioning a tubing adjacent to a plurality of tube engaging members of a pumping mechanism, the pressure plate comprising:

a tubing support surface;

a pump anchor for mounting the tubing support surface to the control module located on the tubing support surface; and

two hooks for mounting the tubing support surface to the control module, wherein the hooks each include a cantilevered spring member extending along the tubing support surface.

5. The pressure plate of claim 4, wherein the tubing support surface, the pump anchor, and the two hooks are made of metal.

6. The pressure plate of claim 4, wherein the two hooks each include a strengthening member.

7. A method for reusing a pressure plate mountable to a control module in an infusion system, the method comprising the steps of:

disengaging a pressure plate having a tubing support surface and a reinforced pump anchor positioned on the tubing support surface from a control module;

removing a first tube from the tubing support surface of the pressure plate;

positioning a second tube along the tubing support surface of the pressure plate; and

engaging the reinforced pump anchor with a releasable securing mechanism within the control module.

8. The method of claim 7, wherein the pressure plate further includes at least one cantilevered spring support.

9. A method for reusing a pressure plate mountable to a control module in an infusion system, the method comprising the steps of:

disengaging a pressure plate having a tubing support surface and two cantilevered hooks positioned on the tubing support surface, the two cantilevered hooks having a portion extending parallel to and in the same plane as the tubing support surface;

removing a first tube from the tubing support surface of the pressure plate;

positioning a second tube along the tubing support surface of the pressure plate; and

engaging the hooks with a pin assembly of the control module.