Peristaltic pump

• US 7,695,255 B2
• Filed: 11/12/2003
• Issued: 04/13/2010
• Est. Priority Date: 11/14/2002
• Status: Active Grant

• Current Assignee: Eitan Medical Limited
• Original Assignee: Q Core Medical Ltd.
• Inventors: Shabat, Roni, Ben-Shalom, Zvi, Goldor, Ori, Ozeri, Shaul
• Primary Examiner(s): FREAY, CHARLES GRANT
• Application Number:
  US10/535,103
• Publication Number:
  US 20080095649A1
• Time in Patent Office: 2,344 Days
• Field of Search: 417/412, 417/474, 417/479, 310/23, 310/24, 310/15, 310/21, 310/36
• US Class Current: 417/412
• CPC Class Codes: A61M 39/281 Automatic tube cut-off devices, e.g. squeezing tube on detection of air
• 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 43/082 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 43/09 Pumps having electric drive

Abstract

A pump for generating fluid flow in an elastic tubular conduit. The pump comprises a plurality of electrically operated valves, each valve being positionable adjacent to the conduit. Each valve has a valve head configured to alternate from a first position in which the lumen of the conduit adjacent to the valve head is unobstructed and a second position in which the lumen of the conduit adjacent to the valve head is obstructed. The pump also comprises a driver configured to control the positions of the valve heads, so as to execute a predetermined temporo-spatial array of valve head positions.

Claims

1. A driving mechanism for use in a pump for generating fluid flow in an elastic tubular conduit having a lumen, the pump including:

(a) four electrically operated valves, each valve being positionable adjacent to the conduit, each valve having a valve head, the valve head configured to alternate from a first position in which the lumen of the conduit adjacent to the valve head is unobstructed and a second position in which the lumen of the conduit adjacent to the valve head is obstructed; and

(b) a driver, comprising at least one electromagnet, configured to control the positions of the valve heads, so as to execute a predetermined temporo-spatial array of valve head positions,

the mechanism comprising;

(a) an X shaped metal lever pivotable around an axis;

(b) a first auxiliary lever pivotable about the axis;

(c) a second auxiliary lever pivotable about the axis;

(d) an intermittently activatable electromagnet generating, when activated, a magnetic field between a first metal core arm and a second metal core arm;

wherein the magnetic field causes rotation of an auxiliary lever about the axis when extremities of the lever arm are not between the first and second core arms so as to bring the extremities between the first and second core arms.

2. A pump for generating fluid flow in an elastic tubular conduit having a lumen, comprising:

(a) four electrically operated valves, each valve being positionable adjacent to the conduit, each valve having a valve head, the valve head configured to alternate from a first position in which the lumen of the conduit adjacent to the valve head is unobstructed and a second position in which the lumen of the conduit adjacent to the valve head is obstructed;

(b) a driver, comprising at least one electromagnet, configured to control the positions of the valve heads, so as to execute a predetermined temporo-spatial array of valve head positions; and

(c) a mechanism comprising;

(a) an X shaped metal lever pivotable around an axis;

(b) a first auxiliary lever pivotable about the axis;

(c) a second auxiliary lever pivotable about the axis;

(d) an intermittently activatable electromagnet generating, when activated, a magnetic field between a first metal core arm and a second metal core arm;

wherein the magnetic field causes rotation of an auxiliary lever about the axis when extremities of the lever arm are not between the first and second core arms so as to bring the extremities between the first and second core arms.