Tubing pump for delivering fluid in a tube

• US 9,217,428 B2
• Filed: 02/06/2013
• Issued: 12/22/2015
• Est. Priority Date: 02/06/2013
• Status: Active Grant

• Current Assignee: Orbray Company Limited
• Original Assignee: Namiki Precision Singapore Pte. Ltd., Namiki Seimitsu Houseki Kabushiki Kaisha
• Inventors: Kashiwagi, Makoto, Koyama, Masahiro
• Primary Examiner(s): Kramer, Devon
• Assistant Examiner(s): ZOLLINGER, NATHAN C
• Application Number:
  US13/760,794
• Publication Number:
  US 20140219843A1
• Time in Patent Office: 1,049 Days
• Field of Search: 417/477.3, 417/477.9, 417/477.11, 417/478
• US Class Current: 1/1
• CPC Class Codes: A61M 5/00 Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests vaccination appliances for veterinary use A61D1/025 ; tube connectors, tube couplings, valves or branch units specially adapted for medical use A61M39/00; containers specially adapted for medical or pharmaceutical purposes A61J1/00; combinations of vial and syringe for mixing or transferring their contents A61J1/20; holders for containers for collecting, storing or administering blood or medical fluids A61J1/16
• CPC Class Codes: A61M 5/142 Pressure infusion, e.g. using pumps
• 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: A61M 5/16813 by controlling the degree of opening of the flow line
• CPC Class Codes: A61M 60/279 Peristaltic pumps, e.g. roller pumps
• CPC Class Codes: A61M 60/284 Linear peristaltic pumps
• CPC Class Codes: F04B 43/08 having tubular flexible members F04B43/12 takes precedence
• 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 43/12 having peristaltic action
• CPC Class Codes: F04B 45/08 having peristaltic action

Abstract

A tubing pump capable of improving flow rate accuracy which is required, particularly, in infusion pumps for medical use is developed. In a tubing pump that delivers a liquid in a tube which is separately loaded, a pump mechanism includes a valve mechanism unit that occludes and releases occlusion to the loaded tube and a tube pressing mechanism unit that repeatedly presses the tube, and the tube squeezing mechanism unit includes a pump block which has its movement guided by at least two guide shafts.

Claims

1. A tubing pump that delivers fluid in a tube which is separately loaded, using a pump mechanism,

wherein the pump mechanism comprises a valve mechanism unit that occludes the tube and releases occlusion to the tube, and a tube pressing mechanism unit that repeatedly presses the tube,

the tube pressing mechanism unit comprises at least two guide shafts which extend substantially perpendicular to an extending direction of the tube located to be pressed in the pump mechanism and a pump block that has its movement guided by the at least two guide shafts in an axial direction of the at least two guide shafts, and the tube is repeatedly pressed by a continuous reciprocation of the pump block,

wherein the tube pressing mechanism unit is coupled with a front facing component which does not operate when delivering the fluid in the tube, the front facing component being positioned directly opposite to the pump block,

a first groove portion having an approximate V shape extending along the tube located to be pressed in the pump mechanism is formed in the pump block,

a second groove portion having an approximate V shape extending along the tube located to be pressed in the pump mechanism is formed in the front facing component, and

the tube is repeatedly pressed between an inclined surface of the first groove portion and an inclined surface of the second groove portion when the pump block reciprocates continuously, the inclined surface of the first groove portion and the inclined surface of the second groove portion facing each other.

2. The tubing pump of claim 1, wherein the valve mechanism unit is located at an upstream side and a downstream side,

the tube pressing mechanism unit is disposed between the valve mechanism unit on the upstream side and the valve mechanism unit on the downstream side,

an operational range of the pump block located in the tube pressing mechanism unit is determined by a pump cam,

an operational range of an upstream side valve of the valve mechanism unit on the upstream side is determined by a first valve cam,

an operational range of a downstream side valve of the valve mechanism unit on the downstream side is determined by a second valve cam, and

the pump cam, the first valve cam, and the second valve cam are different cam components to each other.

3. The tubing pump of claim 1, wherein

the tube pressing mechanism unit has a shaft configured to continuously rotate and a pump cam fixed to the shaft and configured to determine an operational range of the pump block, and

the pump cam is formed such that the tube pressing mechanism unit occludes the tube twice during one revolution of the shaft.