Pressure pump having jaws and end-slots

• US 4,631,007 A
• Filed: 06/27/1985
• Issued: 12/23/1986
• Est. Priority Date: 05/24/1982
• Status: Expired due to Fees

• Current Assignee: Baxter Travenol Laboratories Incorporated (Baxter International Inc.)
• Original Assignee: Baxter Travenol Laboratories Incorporated (Baxter International Inc.)
• Inventors: Olson, Raymond G.
• Primary Examiner(s): Vrablik, John J.
• Application Number:
  US06/749,604
• Time in Patent Office: 544 Days
• Field of Search: 417/477, 417/476, 418/45, 604/153, 128/DIG. 12
• US Class Current: 417/476
• 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

A pressure pump for fluids having a pressure member 12, 12a of generally circular periphery, means 14, 14a for moving the pressure member in an orbital motion about an axis of rotation, and a sleeve member 16, 16a made of a pair of hinged jaws 22, 22a positionable about the pressure member and spaced for receiving and retaining flexible tubing 18, 18a in an annular space between the pressure member and the sleeve member with the tubing surrounding the pressure member for pumping of fluids through the tubing. In accordance with this invention the jaws define end surfaces which abut together in the closed position having slots 34, 34a defined through the end surfaces communicating between the annular space and the outside to receive lengths of the flexible tubing occupying the annular space and extending into and out of the annular space through the slots.

Claims

1. In a pressure pump for conveying fluids through tubing which comprises a pressure member of generally circular periphery, means for moving said pressure member in orbital motion about said pressure member and spaced for receiving and retaining the flexible tubing in an annular space between the pressure member and the sleeve member with the flexible tubing surrounding said pressure member for pumping of fluids through said flexible tubing, the sleeve member being divided into a pair of jaws hinged together at one end to permit opening and closing of the jaws about the pressure member to facilitate installation of the flexible tubing, the improvement comprising, in combination:

said jaws including end surfaces which abut together when said jaws are in the closed position and means defining slots in said end surfaces for accommodating passage of said flexible tubing into and out of said annular space when said end surfaces of said jaws are in abutting relation, and

movable latch means defining a slot for retaining said end surfaces of said jaws in abutting relation, said latch means being positionable adjacent a region of said flexible tubing when said end surfaces of said jaws are retained in abutting relation so that said flexible tubing which passes through said slots in said jaw end surfaces is folded about an angle which is substantially 180 degrees with said tubing extending from said abutting jaw surfaces.

2. A pressure pump as defined in claim 1

wherein said means which defines said slots in said jaw end surfaces is operative, when said jaw end surfaces are in abutting relation, for placing into abutment said flexible tubing passing through said slots in said jaw end surfaces.