# US 11,078,883 B2 · Wind turbine blade with uncoupled trailing edge > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,078,883 B2 - Document ID: US11078883B2 - Status: Granted - Kind: B2 - Application number: 16/595,745 - Filed: 2019-10-08 - Published: 2021-04-08 - Granted: 2021-08-03 - Earliest claimed: 2019-10-08 - Applicants: Michael L. Barrows - Inventors: Michael L. Barrows - Web page: https://patentgrep.com/patent/US11078883B2 ## CPC - F03D 1/0675: {of the blades} - F01D 5/147: {Construction, i.e. structural features, e.g. of weight-saving hollow blades (F01D5/148, F01D5/16 and F01D5/20 take precedence; blade shape F01D5/141; blades with cooling or heating channels or cavities F01D5/18; heating, heat-insulating or cooling means on blades F01D5/18)} - F01D 5/18: Hollow blades, {i.e. blades with cooling or heating channels or cavities (structure of hollow blades in general F01D5/147)}; Heating, heat-insulating or cooling means on blades - F03D 1/0658: {Arrangements for fixing wind-engaging parts to a hub} - F03D 1/0691: {of the hub} - F05B 2240/311: flexible or elastic - Y02E 10/72: Wind turbines with rotation axis in wind direction - F03D: WIND MOTORS - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - F05B: INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A blade for a wind turbine has a hollow or exoskeleton blade body. The blade body has a leading edge and a trailing edge along a span thereof. The blade body includes a first blade portion and a second blade portion wherein the first blade portion and the second blade portion are integrated with one another along at least 90% of the leading edge, and are in uncoupled contact at the trailing edge. The uncoupled contact permits the first blade portion and second blade portion to experience relative movement at the trailing edge when the blade body twists. ## Claims ### Claim 1 A blade for a wind turbine, comprising an exoskeleton blade body having a leading edge and a trailing edge along a span of said blade body, said blade body having a first blade portion and a second blade portion wherein said first blade portion and said second blade portion are integrated with one another along at least 90% of said leading edge, and wherein said first blade portion and said second blade portion are in unbonded and non-integrated contact at said trailing edge for supporting relative movement between said first blade portion and said second blade portion all along said span of said blade body at said trailing edge when said blade body twists wherein, when oscillating torsional loads are generated as said blade body undergoes cyclic twisting, said unbonded and non-integrated contact causes said oscillating torsional loads to be directed through said leading edge and not through said trailing edge. ### Claim 2 (depends on 1) The blade as in claim 1, further comprising a hollow mounting support integrated with a root of said blade body, said hollow mounting support having a first support portion extending from said first blade portion and having a second support portion extending from said second blade portion, wherein said first support portion and said second support portion are integrated where extending from said leading edge, and wherein said first support portion and said second support portion are in contact with one another where extending from said trailing edge for supporting sliding movement there between when said blade body twists. ### Claim 3 (depends on 2) The blade as in claim 2, further comprising a rigid support disposed in at least a portion of said hollow mounting support, said rigid support and said hollow mounting support adapted to be coupled to a hub of a wind turbine wherein said first support portion and said second support portion remain in said contact with one another where extending from said trailing edge for supporting sliding movement there between when said blade body twists. ### Claim 4 (depends on 1) The blade as in claim 1, wherein said first blade portion and said second blade portion are integrated with one another along 100% of said leading edge. ### Claim 5 (depends on 1) The blade as in claim 1, wherein said at least 90% of said leading edge is a first contiguous region of said leading edge extending from a root of said blade body, wherein a second contiguous region of said leading edge extends from said first contiguous region to a tip of said blade body, and wherein said first blade portion and said second blade portion are in contact with one another at said second contiguous region and at said tip of said blade body for supporting sliding movement there between when said blade body twists. ### Claim 6 A blade for a wind turbine, comprising a hollow blade-shaped body having a root and a tip, said blade-shaped body having a leading edge and a trailing edge wherein said leading edge and said trailing edge extend from said root to said tip, said blade-shaped body having a first blade portion and a second blade portion wherein said first blade portion and said second blade portion are integrated at said leading edge and are in unbonded and non-integrated contact at said trailing edge for supporting relative movement between said first blade portion and said second blade portion all along said span of said blade body along all of said trailing edge when said blade body twists wherein, when oscillating torsional loads are generated as said blade body undergoes cyclic twisting, said unbonded and non-integrated contact causes said oscillating torsional loads to be directed through said leading edge and not through said trailing edge. ### Claim 7 (depends on 6) The blade as in claim 6, further comprising a hollow mounting support integrated with and extending from said root, said hollow mounting support having a first support portion extending from said first blade portion and having a second support portion extending from said second blade portion, wherein said first support portion and said second support portion are integrated where extending from said leading edge, and wherein said first support portion and said second support portion are in contact with one another where extending from said trailing edge for supporting sliding movement there between when said blade body twists. ### Claim 8 (depends on 7) The blade as in claim 7, further comprising a rigid support disposed in at least a portion of said hollow mounting support, said rigid support and said hollow mounting support adapted to be coupled to a hub of a wind turbine wherein said first support portion and said second support portion remain in said contact with one another where extending from said trailing edge. ### Claim 9 (depends on 6) The blade as in claim 6, wherein said first blade portion and said second blade portion are in contact with one another at said tip of said blade body for supporting sliding movement there between when said blade body twists. ### Claim 10 A blade for a wind turbine, comprising a hollow blade-shaped body having a root and a tip, said blade-shaped body having a leading edge and a trailing edge wherein said leading edge and said trailing edge extend from said root to said tip, said blade-shaped body having a first blade portion and a second blade portion wherein said first blade portion and said second blade portion are integrated with one another along at least 90% of said leading edge and are in an unbonded and non-integrated contact relationship at said trailing edge, said blade-shaped body adapted to be coupled to a hub of a wind turbine wherein said first body portion and said second body portion remain in said unbonded and non-integrated contact relationship at said trailing edge for supporting relative movement between said first blade portion and said second blade portion all along said span of said blade body along all of said trailing edge when said blade body twists wherein, when oscillating torsional loads are generated as said blade body undergoes cyclic twisting, said unbonded and non-integrated contact relationship causes said oscillating torsional loads to be directed through said leading edge and not through said trailing edge. ### Claim 11 (depends on 10) The blade as in claim 10, wherein said blade-shaped body includes a hollow mounting support integrated with and extending from said root, said hollow mounting support having a first support portion extending from said first blade portion and having a second support portion extending from said second blade portion, wherein said first support portion and said second support portion are integrated where extending from said leading edge and wherein said first support portion and said second support portion are in contact with one another where extending from said trailing edge for supporting sliding movement there between when said blade body twists. ### Claim 12 (depends on 11) The blade as in claim 11, further comprising a rigid support disposed in at least a portion of said hollow mounting support, said rigid support and said hollow mounting support adapted to be coupled to a hub of a wind turbine wherein said first support portion and said second support portion remain in said contact with one another where extending from said trailing edge. ### Claim 13 (depends on 10) The blade as in claim 10, wherein said first blade portion and said second blade portion are integrated with one another along 100% of said leading edge. ### Claim 14 (depends on 10) The blade as in claim 10, wherein said at least 90% of said leading edge is a first contiguous region of said leading edge extending from said root of said blade body, wherein a second contiguous region of said leading edge extends from said first contiguous region to said tip of said blade body, and wherein said first blade portion and said second blade portion are in contact with one another at said second contiguous region and at said tip of said blade body for supporting sliding movement there between when said blade body twists.