If you are referring to extractors in laundromats, legal action was brought against Bock more than a few times by employees of laundries and customers of laundromats for claims of injury. One particular case involved a young boy who lost an arm...
https://law.justia.com/cases/texas/supreme-court/1977/b-6857-0.html
When Braun (IIRC), came out with first industrial/commercial washer that could extract (washer-extractor) days of separate extractors in commercial laundries were numbered. Many places hung on to them for various reasons, but newer laundries and or places that had major upgrades of equipment got rid of spin driers in favor of washer/extractors.
Laundromats fearing lawsuits began to so same. As places moved away from top loading to h-axis washers in American laundromats again there was less need for centrifuges. Hard mount coin front loaders while having lower rpm than machines today, still were better at final extraction than most top loading washers.
American housewives never really experienced spin dryers. To best or my knowledge they never were sold here for domestic use. What there was came part of twin tubs like those offered by GE, Hoover, Easy, and others.
Blessed with abundant natural resources, and often low energy rates (well compared to Europe or elsewhere), once tumble dryers came along housewives and others doing laundry weren't that bothered about final moisture retention with automatic or even semi automatic washers, washers, or even using wringer, things were just bunged into dryer that baked all that water out of laundry.
All this being said apparently there still are some laundromats out there in USA still with Bock extractors...
This is a lawsuit waiting to happen..