Inventor
BLOOM FRANK
US5 patents
Patents
5 patentsUS4694213ASep 15, 1987
Ferrofluid seal for a stationary shaft and a rotating hub
FERROFLUIDICS CORP67 citations94
US4890850AJan 2, 1990
Tapered ferrofluid seal
FERROFLUIDICS CORP21 citations81
US4865334ASep 12, 1989
Long-life multi-stage ferrofluid seals incorporating a ferrofluid reservoir
FERROFLUIDICS CORP22 citations80
US5018751AMay 28, 1991
Stacked pole-piece ferrofluid seal apparatus
FERROFLUIDICS CORP19 citations71
US4927164AMay 22, 1990
Ferrofluid seal with epoxy pole pieces
FERROFLUIDICS CORP12 citations71