Modernizing the Bird Mark 7 ventilator (MARK-19)

[saso]

https://www.mark-19.com/
https://github.com/cleveriza/Mark-19-Ventilator
https://www.youtube.com/watch?v=SG3zlpRSfWE
https://en.wikipedia.org/wiki/Forrest_Bird

The Bird Mark 7 ventilator (Mark 7) was introduced in 1958 and was widely used in the United States into the 1990s and is still in use by the British National Health Service. The classic design requires no electricity. Older clinicians are already familiar with it. It is effective at saving lives but the original design lacks some key features that make it applicable to the COVID-19 crisis.

The National Strategic Research Institute (NSRI), UC Davis and Livermore Instruments Inc. are partnering to rapidly redesign the Mark 7 to include simplified supply chain components and to mass produce a modern version that adds critical features. We call our new model the MARK-19.

mark7.png (878.22 KiB) Viewed 2063 times

EUmSKtXXsAEduKY.jpg (56.81 KiB) Viewed 2058 times

ping

ping

Should be no problem for FreeCAD to open the step file and do the molds for the plastic parts and g-code for the milling of the center metal peace right... ?

[Cpl_Detritus]

I can only see it as one single part. We need to chop this up into separate parts.

[chrisb]

Using these import settings splits it on import:

[chrisb]

It's not clear to me whereof you need GCode paths. Can anyone get these things sorted, e.g. by coloring different materials or by processing need or whatever.

[Cpl_Detritus]

Here are some links to service manuals of the device

https://www.scribd.com/doc/90822579/Bir ... ice-Manual

http://frankshospitalworkshop.com/equip ... manual.pdf

https://www.academia.edu/12032637/Bird_ ... ice_manual


They provide nice exploded view of the internal parts.

[Cpl_Detritus]

It's not clear to me whereof you need GCode paths. Can anyone get these things sorted, e.g. by coloring different materials or by processing need or whatever.

I think we need to separate this into several groups

* Off the shelf parts - Things like screws, washers, o-rings, pieces of hose etc.

* Plastic parts - injection molded stuff that would need molds made.

* Metal parts - Things that need to be machined

* Elastomeric parts - Things like membranes, special shape seals etc.

We also need to do this coordianted with the Mark-19 team so we don't have any unnecessary duplication of effort.

[saso]

I don't know what are the modifications that they want to do on it with the MARK-19 project, but just for an example I was guessing that creating a mold for "X76_Pressure housing v1" and "X48_Ambient housing v1" and the gcode for "X1_Manifold v1" should probably not be that hard, but mostly just as a proof-of-concept that FreeCAD is able to do such things and to start somewhere...

Mark7 main parts.png (294.86 KiB) Viewed 1970 times

Here are some links to service manuals of the device

They provide nice exploded view of the internal parts.

Nice find!

[saso]

List (tree) of components with our nice new TreeToAscii Macro (https://wiki.freecadweb.org/Macro_TreeToAscii)

Mark7_TreeToAscii.txt

(13.38 KiB) Downloaded 40 times

[saso]

Some additional info on IPPB (intermittent positive pressure breathing) vs CPAP (continuous positive airway pressure)... Don't yet know the relation of it to covid-19 treatment.

http://www.gicu.sgul.ac.uk/resources-fo ... .docx/view
http://www.scielo.br/scielo.php?pid=S18 ... xt&tlng=en

[saso]

Here is also the list of components created with the Reporting WB (https://github.com/furti/FreeCAD-Reporting) with the statement:

Code: Select all

Select Label
From document
Where TypeId = 'Part::Feature'

Mark7_report.txt

(2.72 KiB) Downloaded 47 times