Talk:Peristaltic pump

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NPOV dispute - Biased or questionable information source? Eccentric single cam pumps

I note that a large amount of the text and terminology others have questioned in this article is repeated, verbatim, on http://www.eccentricpumps.com who sell the single bearing pump you see a picture of in the main article, as the very first image. And they've included a link to their site from the article.

The article doesn't make any mention of possible negatives for the single cam design, such as back flow being able to pass through one pinch point easier than it will a multiple. I'm no expert on these pumps, but I imagine that would be a possible negative of the design and be important to a lot of the people who use these specifically to deal with critical, highly reactive or biologically contaminated systems.

Another drawback is that the single cam rotor is inherently unbalanced, which means vibration. If you search youtube for "eccentric pump" you'll see one vibrating across a bench.

Yet another issue is that blocking the discharge port can cause the tubing to bind up inside the cavity, because there aren't any other pinch points to hold it in place. It then needs backing up to untangle the hose. Again, there are videos of that happening on youtube under the same search.

Put titles on your comments :P

I'm not a pump expert but isn't the 'shoe' or 'wiper' a 'cam'? That way we can put a link in to another article.

Also, it's my understanding that peristaltic pumps can be made the cheapest of all pumps. Therefore it's used in the low-cost battery-operated self-contained "fountains" that are all the rage right now. Furthermore, the weak point of peristatlic pumps is the flexible tubing. Becaused it's flexed, it will eventually wear out first. Otherwise, the rest of the pump is extremely reliable. Samw 03:41 22 May 2003 (UTC)

I've spent all morning using a cheap (£10) battery-powered water pistol. I had to assume it was using a peristaltic pump (one of the decorative windows shows a rotating plastic object likely linked to the motor). I'm tempted to take it apart but I'm not sure what else it could be powered by. Pitt2 18:25, 14 July 2007 (UTC)[reply]

Wikipedia defines "cam" as "A cam is a projecting part of a rotating wheel or shaft that strikes a lever at one or more points on its circular path. The cam can be a simple tooth, as is used to deliver pulses of power to a steam hammer, for example, or an eccentric disc or other shape that produces a smooth oscillating motion in the lever." I think this means the shoe is not a cam. --81.153.76.99 16:35, 25 February 2007 (UTC)[reply]

Dr. Michael De Bakey did NOT invent the peristaltic pump

Dr. Michael De Bakey did NOT invent the peristaltic pump. According to my research the earliest finding/patent I found was US patent (US249285) which was published in 1881 by Eugene E. Allen. Here is the link to the patent: http://www.google.com/patents?id=yzpRAAAAEBAJ&pg=PA4&dq=249285&hl=en&ei=Hj9qTsucKqyfsQKF_Zi8Bg&sa=X&oi=book_result&ct=result&resnum=1&sqi=2&ved=0CC8Q6AEwAA#v=onepage&q&f=false — Preceding unsigned comment added by Gunayozturk (talk • contribs) 18:50, 16 March 2011 (UTC)[reply]