US 12,012,924 B2
Fixed and pitching blades, spar shaft, bearings and materials for marine current turbine
James George Purnell Dehlsen, Santa Barbara, CA (US); Peter Stricker, Santa Barbara, CA (US); Ole Kils, Santa Barbara, CA (US); Tyler Mayer, Santa Barbara, CA (US); and Henry Swales, Santa Barbara, CA (US)
Assigned to Aquantis, Inc., Santa Barbara, CA (US)
Filed by Aquantis, Inc., Santa Barbara, CA (US)
Filed on Mar. 7, 2022, as Appl. No. 17/688,772.
Claims priority of provisional application 63/157,464, filed on Mar. 5, 2021.
Prior Publication US 2022/0341386 A1, Oct. 27, 2022
Int. Cl. F03B 3/14 (2006.01)
CPC F03B 3/145 (2013.01) [F05B 2210/11 (2013.01); F05B 2240/30 (2013.01); F05B 2260/79 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A variable pitch, hub, and rotor system for a marine turbine comprising: a monolithic fixed blade hub comprising a central fixed hub and a first fixed blade section and a second fixed blade section, a first blade comprising a first pitching blade section connected to the first fixed blade section by a first spar pitch shaft, wherein the first spar pitch shaft enables the first pitching blade section to rotate about its longitudinal axis relative to the first fixed blade section; a second blade comprising a second pitching blade section adjoined to the second fixed blade section and a second spar pitch shaft passing through the second fixed blade section, wherein the second spar pitch shaft enables the second pitching blade section to rotate about its longitudinal axis relative to the second fixed blade section; and the first fixed blade section and the second fixed blade section each comprise a water-lubricated outer pitch bearing and a water-lubricated inner pitch bearing to allow free rotation of the respective spar pitch shaft.