Movable stator walls permitting access to tubing in peristaltic pump

• US 4,138,205 A
• Filed: 12/15/1975
• Issued: 02/06/1979
• Est. Priority Date: 12/15/1975
• Status: Expired due to Term

• Current Assignee: Cole-Parmer Instrument Company (Thermo Fisher Scientific Incorporated)
• Original Assignee: Hydro Pulse Corporation
• Inventors: Wallach, Mark
• Primary Examiner(s): Vrablik, John J.
• Assistant Examiner(s): Ross, Thomas I.
• Application Number:
  US05/641,103
• Time in Patent Office: 1,149 Days
• Field of Search: 417/360, 417/477, 417/476, 417/475, 222/214, 418/39, 418/70, 418/45
• US Class Current: 417/360
• CPC Class Codes: A61M 5/14232 Roller pumps
• CPC Class Codes: F04B 43/1284 Means for pushing the backing-plate against the tubular flexible member

Abstract

A tubing replaceable, peristaltic pump includes a base plate and a rotor mounted on the base plate and having peripherally spaced thrust rollers. Pivotally mounted on the base plate on opposite sides of the rotor are a pair of stator members which are swingable about proximate laterally spaced ends thereof between closed and open positions with their inner concave cylindrical faces confronting the rotor being respectively proximate and coaxial with the rotor and remote from the rotor. Hand operated devices are located at the free ends of the stator members and swing the stator members between locked closed positions and open positions. A flexible collapsible tube is entrapped between the rotor and closed stator members and is replaceable when the stator members are in opened position, the tube extending radially outwardly between the stator member laterally spaced front ends. If desired the stator members are reciprocatable towards and away from the rotor.

Claims

1. A peristaltic pump comprising a base member, a rotor having a plurality of peripherally spaced thrust elements disposed on said base member, said rotor being rotatable about a longitudinal axis, a pair of stator members disposed in opposite sides of said rotor, each stator member having a concave face confronting the periphery of said rotor, said stator members being pivoted, at laterally spaced apart proximate first ends thereof, to said base member for swinging about respective longitudinal axes between relative closed positions with said stator faces proximate said rotor and an open position with said stator faces remote from said rotor wherein when said stator members are in their closed positions the said first ends thereof are laterally spaced and the respective opposite second ends thereof are in substantially abutting engagement, means for releaseably locking said stator members in their closed positions, and a resilient collapsible tube disposed between said rotor and said stator member faces and compressed by successive thrust elements against said stator member faces when said stator members are in closed position and removable from between said rotor and stator members when said stator members are in open position.

2. The peristaltic pump of claim 1 wherein said faces of said stators when in closed positions define a cylindrical arcuate surface coaxial with said rotor.

3. The peristaltic pump of claim 1 wherein the confronting faces of said stator members proximate the first ends thereof have passageways formed therein extending between said concave cylindrical faces and the outside end faces of said stator members, said tube extending along and nesting in said passageways.

4. The peristaltic pump of claim 1 wherein said stator member locking means are manually operable and swing said stator members between their open and closed positions.

5. The peristaltic pump of claim 1 wherein said rotor comprises a hub and a pair of axially spaced coaxial discs mounted on said hub, said thrust elements comprising freely rotatable longitudinally extending rollers supported between the binders of said discs.

6. A peristaltic pump comprising a base member, a rotor having a plurality of peripherally spaced thrust elements disposed on said base member said rotor being rotatable about a longitudinal axis, a pair of laterally spaced stator members having concave faces confronting the periphery of said rotor, said stator members being mounted on said base member and laterally reciprocatable thereon relative to said rotor between closed positions with said stator faces proximate said rotor and open positions with said stator faces remote from said rotor, said stator members in said closed positions having corresponding first ends thereof defining a transverse throat and opposite corresponding second ends in substantially abutting engagement, an actuating arm on at least one of said pair of stator members connected to means extending through said one stator member and cooperating with the base member for reciprocating said one stator member to its open and closed positions, means for releaseably locking said stator members in their closed positions and a resilient, elongated, collapsable tube extending peripherally along and disposed between said rotor and said stator faces and extending through said throat and compressed by successive thrust elements against said stator faces when said stator members are in closed position and movable from between said rotor and stator members when said stator members are in open position.

7. The peristaltic pump of claim 6 wherein said base member has laterally spaced laterally extending slots formed therein and including follower members depending from said stator members into sliding engagement with said slots.