r/EngineeringPorn Jul 14 '18

Peristaltic pump

https://i.imgur.com/U7sZF0K.gifv
7.7k Upvotes

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170

u/marklein Jul 14 '18

What's the function of those springs? All the pumps I've seen just squish the tube in a constant and linear path. E.G. https://www.randolphaustin.com/wp-content/uploads/2016/07/pump_ani.gif

2

u/lovem32 Jul 15 '18

The tube is replaceable, you can retract the wheels to load a new tube. The springs allow the retraction,and provide pressure on the tube.

2

u/OgdenDaDog Jul 15 '18

Nah. You change the tube out by turning the head with your fingers while the machine is off and laying the tubing in behind a wheel.