Peristaltic pump

US10316834B2 · kind B2 · utility

Assignee

• DEKA Products Limited Parternship · US

Inventors

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

Key dates

• Filing date: Nov 9, 2017
• Grant date: Jun 11, 2019
• Expiry date: Nov 9, 2037

Classification

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

Abstract

A 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, a spring-cam plunger, a position sensor, and a processor. The plunger cam is coupled to the cam shaft. The plunger-cam follower is configured to engage the plunger cam. The spring-biased plunger is coupled to the plunger-cam follower where expansion of the plunger cam along a radial angle intersecting the plunger-cam follower as the cam shaft rotates pushes the plunger cam to disengage the spring-biased plunger from the tube and a spring coupled to the spring-biased plunger biases the spring-biased plunger to apply the crushing force to the tube. The position sensor is operatively coupled to the spring-biased plunger and is configured to determine a position of the spring-biased plunger. The processor estimates fluid flow using the position.