US 12,252,220 B2
Electric fin and water transport instrument
Zhiyue Wang, Shanghai (CN)
Assigned to Oriental Recreational Products (Shanghai) Co., LTD, Shanghai (CN)
Appl. No. 17/628,406
Filed by Oriental Recreational Products (Shanghai) Co., LTD, Shanghai (CN)
PCT Filed Jul. 27, 2020, PCT No. PCT/CN2020/104879
§ 371(c)(1), (2) Date Jan. 19, 2022,
PCT Pub. No. WO2021/018090, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. 201910688531.7 (CN), filed on Jul. 29, 2019.
Prior Publication US 2022/0315175 A1, Oct. 6, 2022
Int. Cl. B63B 32/60 (2020.01); B63B 32/10 (2020.01); B63H 23/24 (2006.01)
CPC B63B 32/60 (2020.02) [B63B 32/10 (2020.02); B63H 23/24 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An electric fin, comprising:
a housing, extending in a first direction and having a water inlet cavity;
a propeller and a flow guide sequentially arranged in said first direction, wherein said propeller is located in said water inlet cavity, at least part of said flow guide is located in said water inlet cavity, and a water flow in said water inlet cavity flows out of said flow guide;
said propeller is provided with a propeller shaft comprising a first end portion, a second end portion, and a plurality of blades, said propeller shaft extending in said first direction, and said plurality of blades being spaced around a circumference of said propeller shaft, each of said plurality of blades having a height “H” and extending helically about at least a portion of said propeller shaft and having a decreasing taper in said height H in a direction toward said flow guide;
said flow guide is provided with a guide shaft and a plurality of flow deflectors, said guide shaft extending in said first direction and said plurality of flow deflectors being spaced around a circumference of said guide shaft; and
said propeller shaft and said guide shaft having an outer contour S with a taper which decreases gradually along a second direction from said second end portion of the propeller shaft toward said flow guide,
wherein one end of each blade along its extension direction is flush with an edge of said second end portion of the propeller shaft.