Blood pump tube element

• US 4,012,177 A
• Filed: 08/31/1973
• Issued: 03/15/1977
• Est. Priority Date: 08/31/1973
• Status: Expired due to Term

• Current Assignee: Sam S. Yakich
• Original Assignee: Sam S. Yakich
• Inventors: Yakich, Sam S.
• Primary Examiner(s): Croyle, Carlton R.
• Assistant Examiner(s): Ross, Thomas I.
• Application Number:
  US05/393,568
• Time in Patent Office: 1,292 Days
• Field of Search: 417/476, 417/477, 417/478, 417/479, 417/244, 417/475, 222/214, 128/214 F
• US Class Current: 417/477.8
• CPC Class Codes: A61M 60/113 in other functional devices, e.g. dialysers or heart-lung machines
• CPC Class Codes: A61M 60/279 Peristaltic pumps, e.g. roller pumps
• CPC Class Codes: A61M 60/284 Linear peristaltic pumps
• CPC Class Codes: A61M 60/37 Haemodialysis, haemofiltration or diafiltration
• CPC Class Codes: A61M 60/441 generated by an electromotor
• CPC Class Codes: A61M 60/837 Aspects of flexible displacement members, e.g. shapes or materials
• CPC Class Codes: A61M 60/849 Disposable parts
• CPC Class Codes: F04B 43/0072 of tubular flexible members
• CPC Class Codes: F04B 43/088 with two or more tubular flexible members in series F04B43/1133 takes precedence
• 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

Abstract

The Blood Pump Tube Element will prevent the destruction of blood cells during a prolonged pumping of blood. The device comprises a series of interconnected bag-like chambers within a tube. The chambers fully contain fluid (blood) and each is provided with inlet and outlet valve means. The tube is engaged by a plurality of rollers mounted on rotating arms, thereby giving a peristaltic pumping action to the fluid in the bag-like chambers. Additionally, the position of the rollers on the arms may be adjusted.

Claims

1. A Blood Pump Tube Element including:

A. a sequential plurality of resilient bag-like chambers wherein each chamber has one outlet comprising a single hole in the surface of the chamber and each chamber surface opposite to the outlet has a plurality of holes for forming an inlet;

including resilient spherical balls for closing each said single hole outlet even when the balls are deformed due to side pressures since the chambers will follow the same deformation and metallic helical springs for biasing the balls against the walls of the bag-like chambers containing the outlet holes and for displacing the walls inwardly to secure more closing contact area around the balls when side pressures are applied to the balls; and

wherein the plurality of said chambers being fused together so as to connect the outlet and inlet surfaces of consecutive chambers;

said spring-biased balls, located inside cavities formed by chamber surfaces containing the consecutive outlet and inlet holes, acting as separating valves between the bag-like chambers,

B. an outer resilient tube about the said sequential plurality of bag-like chambers fused at spots to the plurality of bag-like chambers, and

C. rollers mounted at ends of arms fixed about a shaft driven by an electric motor;

said rollers contacting the outer tube;

said arms being provided with longitudinal slots to carry position-adjustable attachment means for the rollers, thereby enabling the adjustment of side pressure or the amount of fluid to pass through the bag-like chambers.