Medicine pump

• US 4,705,464 A
• Filed: 05/09/1986
• Issued: 11/10/1987
• Est. Priority Date: 05/09/1986
• Status: Expired due to Fees

• Current Assignee: Dennis T. Grendahl
• Original Assignee: Surgidev Corporation
• Inventors: Arimond, Timothy V.
• Primary Examiner(s): Smith, Leonard E.
• Application Number:
  US06/861,366
• Time in Patent Office: 550 Days
• Field of Search: 417/476, 417/477
• US Class Current: 417/477.7
• CPC Class Codes: F04B 43/1253 by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
• CPC Class Codes: F04B 43/1276 Means for pushing the rollers against the tubular flexible member

Abstract

Low power peristaltic medicine pump and filter for infusion of medicinal solutions. The pump includes a pump housing, a low durometer PVC pump tube; fit within an interior circular groove of the pump housing, tube slots, a rotor cavity within the walls of the pump housing bearing hole and recessed motor mounting body holes. A sealed geared motor in a motor recess in the bottom of the pump housing and a shaft and drive pin extend from the motor through a bearing hole in the pump housing to drive a pump rotor. Rotor mounted plungers offset at an angle to the radii of the pump rotor body to minimize internal friction for low power consumption and are spring loaded outwardly to depress plunger mounted rollers against the PVC pump tubing for subsequent peristalic pumping action through an inset PVC pump tube. A knurled knob loading tool positions on the pump rotor. Feed fingers attached to a circular plate on the loading tool facilitate loading of the PVC pump tube into the inner groove of the pump housing. A low durometer PVC pump tube attaches to a medical solution filter system which includes internal filter members, ribbed filter supports, hydrophobic filters, air elimination ports, a filter outlet port, a medicine bag puncturing tip, filter alignment pins, a medical solution outlet and peristaltic pump tube connection and support orifices. The peristalic pump and the filter align and are spaced on an alignment bracket on an electromechanical housing. A spring pressurized IV medicine bag in a detachable housing supplies infusate to the filter and the peristalic pump.

Claims

1. Drug dispensing pump comprising:

a. low power DC sealed motor with torqued gear ratio means;

b. pump head including a plurality of plungers connected to a shaft of said motor, each of said plungers supporting a roller bearing, each of said plungers spring loaded for accommodating variances of pump tubing, and each of said springs including a spring constant to fully occlude said pump tubing, each of said plungers mounted at an angle in said pump head for minimized friction, as well as low power at high infusion rates;

c. pump housing secured to a motor housing including a recessed slot for keeping said pump tubing in said pump head captured and providing a guide for said roller bearings; and

,

d. means for loading said pump tubing into said pump housing, said loading means including a disc affixed to said shaft, at least three fingers extending outwardly from said disc, and a knurled knob attached to said disc for manually rotating said shaft providing movement of said fingers whereby said loading means loads pump tubing into said pump head.