LAMINATED LIQUID PUMP AND METHOD OF MAKING SAME

• US 3,689,204 A
• Filed: 05/18/1970
• Issued: 09/05/1972
• Est. Priority Date: 05/18/1970
• Status: Expired due to Term

• Current Assignee: Bert C. Prisk
• Original Assignee: Bert C. Prisk
• Inventors: Bert, C. Prisk
• Primary Examiner(s): Robert M. Walker
• Application Number:
  US05/038,353
• Time in Patent Office: 841 Days
• Field of Search: 417/394,478,479,480
• US Class Current: 417/394
• CPC Class Codes: A61M 60/117 for assisting the heart, e.g. transcutaneous or external ventricular assist devices
• CPC Class Codes: A61M 60/122 Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
• CPC Class Codes: A61M 60/148 in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
• CPC Class Codes: A61M 60/268 the displacement member being flexible, e.g. membranes, diaphragms or bladders
• CPC Class Codes: A61M 60/435 with diastole or systole switching by valve means located between the blood pump and the hydraulic or pneumatic energy source
• CPC Class Codes: A61M 60/462 Electromagnetic force
• CPC Class Codes: A61M 60/837 Aspects of flexible displacement members, e.g. shapes or materials
• CPC Class Codes: A61M 60/851 Valves
• CPC Class Codes: A61M 60/892 Active valves, i.e. actuated by an external force
• CPC Class Codes: A61M 60/894 Passive valves, i.e. valves actuated by the blood
• CPC Class Codes: A61M 60/896 having flexible or resilient parts, e.g. flap valves
• CPC Class Codes: F04B 43/0054 particularities of the flexible members
• CPC Class Codes: F04B 43/025 two or more plate-like pumping members in parallel
• CPC Class Codes: F04B 43/06 Pumps having fluid drive
• CPC Class Codes: F04B 43/10 Pumps having fluid drive
• CPC Class Codes: F04B 53/1092 and one single element forming both the inlet and outlet closure member

Abstract

A liquid pump is formed by superposing several sheets of thin flexible material which may be fused together, for example, polyvinyl chloride. The flexible sheets form a displacement chamber, an air pressure operated pumping chamber inlet and outlet passages and check valve flaps in the passages. The valve flaps are formed from the flexible sheets by slitting in appropriate places or are provided by separate flexible sheets. The several sheets are laminated by applying heat and pressure in a predetermined pattern to provide the essential pump elements. The pumping air chamber may be omitted.

Claims

1. A liquid pump operable by pulsed air pressure having a displacement chamber with walls formed of two flat sheets of flexible material joined at their sides, inlet and outlet passages communicating with the displacement chamber and having walls formed of the same sheets, an inflatable pumping chamber within the displacement chamber and formed of two flat sheets of flexible material joined at their periphery, inlet means for supplying air to the pumping chamber for varying the volume of the displacement chamber, and inlet and outlet valves in the inlet and outlet passages respectively, the valves comprising pairs of flexible flaps each secured to one of the sheets and cooperating to provide unidirectional fluid flow.

2. A liquid pump operably by pulsed air pressure having a displacement chamber with walls formed of flat sheets of flexible material joined at their sides, inlet and outlet passages communicating with the displacement chamber and having walls formed of the same sheets, at least a portion of each displacement chamber wall being double layered to define an air chamber between the two wall layers, an inlet means for supplying pulsed air pressure to the air chambers for varying the volume of the displacement chamber, and inlet and outlet valves in the inlet and outlet passages respectively, each valve comprising a pair of flexible flaps each secured to one of the sheets and cooperating to provide unidirectional fluid flow.