Patent ID: 9541060
Date: 2017-01-10
CPC Classifications: F03D,Y02E

Claim:
1. A rotatable windmill blade assembly adapted to spin in response to the wind so as to generate a corresponding rotational force for producing work, said rotatable blade assembly comprising: a first L-shaped blade member having a first pair of intersecting blade arms and a hub mounting hole formed therethrough at the intersection of said first pair of blade arms; a second L-shaped blade member having a second pair of intersecting blade arms and a hub mounting hole formed therethrough at the intersection of said second pair of blade arms; each of said first and second L-shaped blade members having a blade member connecting slot located at the intersection of the respective first and second pairs of intersecting blade arms and communicating with respective ones of the hub mounting holes thereof, the blade member connecting slots of said first and second L-shaped blade members being aligned with one another along a coupling axis running therebetween; said first and second L-shaped blade members being movable towards one another along said coupling axis such that the blade member connecting slots of said L-shaped blade members are slidably received in interlocking engagement one within the other and the respective hub mounting holes are moved into axial alignment with one another; and a hub extending through the axially-aligned hub mounting holes of said first and second L-shaped blade members.