US 12,187,403 B1
Stern drive propeller hub assembly
Ken Konrad, Hudson, WI (US)
Filed by Ken Konrad, Hudson, WI (US)
Filed on Nov. 12, 2021, as Appl. No. 17/525,059.
Claims priority of provisional application 63/113,372, filed on Nov. 13, 2020.
Int. Cl. B63H 5/10 (2006.01); B63H 23/32 (2006.01)
CPC B63H 5/10 (2013.01) [B63H 2005/106 (2013.01); B63H 2023/323 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A propeller hub assembly for a counter rotating propeller stern drive propulsion assembly having an inner and outer propeller shaft, said propeller hub assembly comprising:
a) a hub housing having an opening adapted to envelop the inner and outer propeller shafts;
b) a forward propeller mounted to said hub housing and having a tapered hub exterior with propeller blades extending therefrom, said tapered hub of said forward propeller having an axial opening having a first diameter for engaging the outer propeller shaft;
c) a first securement structure adapted to secure said forward propeller to the outer propeller shaft;
d) an aft propeller mounted adjacent and aligned with said forward propeller, said all propeller having a tapered hub exterior with propeller blades extending therefrom, said tapered hub of said aft propeller having an axial opening having a second diameter for engaging the inner propeller shaft, said axial opening having a terminal end; and
e) a second securement structure mounted within said terminal end of said axial opening of said tapered hub of said aft propeller and being adapted to secure said aft propeller hub to the inner propeller shaft.