System, method, and apparatus for infusing fluid

US9677555B2 · kind B2 · utility

Assignee

• DEKA Products Limited Parternship · US

Inventors

• Dean Kamen · Bedford, US
• John M. Kerwin · Manchester, US
• Colin H. Murphy · Cambridge, US
• Larry B. Gray · Merrimack, US
• Christopher C. Langenfeld · Nashua, US
• Michael J. Slate · Merrimack, US
• Michael S. Place · Manchester, US

Key dates

• Filing date: Dec 21, 2012
• Grant date: Jun 13, 2017
• Expiry date: Mar 17, 2035

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04B2205/09
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A peristaltic pump, and related system method are provided. The peristaltic pump includes a cam shaft, first and second pinch-valve cams, first and second pinch-valve cam followers, a plunger cam, a plunger-cam follower, a tube receiver, and a spring-biased plunger. The first and second pinch-valve cams are coupled to the cam shaft. The first and second pinch-valve cam followers each engage the first and second pinch-valve cams, respectively. The plunger cam is coupled to the cam shaft. The plunger-cam follower engages the plunger cam. The tube receiver is configured to receive a tube. The spring-biased plunger is coupled to the plunger-cam follower such that the expansion of the plunger cam along a radial angle intersecting the plunger-cam follower as the cam shaft rotates pushes the plunger cam follower towards the plunger and thereby disengages the spring-biased plunger from the tube. A spring coupled to the spring-biased plunger biases the spring-biased plunger to apply the crushing force to the tube.