Hoovers patent on the beater bar...

[seamusuk]

Hey Guys

When did this expire? Im guessing this would have been the same time Eureka introduced the Vibra groomer?.

I was thinking of this when I was using my Sanitaire ZC880 the other day....

Seamus

 

[seamusuk]

Any ideas??

Anyone lol

 

[hoover1060]

earlier than that...

I am guessing it was sometime in the late 50's or early 60's...Singer had beater-bars on their uprights starting about 1961(U41 upright) Eureka's first beater-bars were the red plastic ones, introduced late in the 60's when tehy went to the front height adjuster.
The Vibra Groomer I was new for 1971.