Very cool!
Looks like a copy (or private label?) of a Tornado...several other companies produced something similar.
I worked on a commercial Filtex central vacuum (CTS-500 dual motor) that was originally installed in a bowling alley. My assumption was that it was used for general cleaning, but the owner of the machine (who had removed it for his own use when the bowling alley was closing) said that it only had piping and inlets in the back, and was used to clean the pin setter machines.