Prior art

The user wants me to identify the most relevant prior art for US patent 9414635, provide full citations, publication/filing dates, brief descriptions, and potentially anticipated claims under 35 U.S.C. § 102.

I have already identified the independent claims of US9414635 and the key elements. I have also identified five highly relevant prior art patents from the citations list, including the four explicitly discussed in the '635 patent's "Description of Related Art" and one additional highly relevant WO application. I have verified that all these are prior art with priority dates preceding US9414635's priority date.

I will now compile the detailed analysis for each of these identified prior art documents.

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Analysis of Prior Art for US9414635 "Biomechanics aware helmet"

The following prior art documents are identified as most relevant, based on their direct citation in US9414635 and their technical content addressing similar problems, particularly related to multi-layered helmet designs for impact and shear force attenuation.

1. U.S. Pat. No. 7,076,811 (Puchalski)

• Full Citation: US7076811B2, "Protective head covering having impact absorbing crumple or shear zone," issued to Puchalski Ione G on 2006-07-18.
• Publication/Filing Date: Priority Date: 2002-09-09; Publication Date: 2006-07-18.
• Brief Description: This patent describes a helmet featuring a shell composed of three or more discrete panels. These panels are designed to move relative to one another upon impact, creating a "crumple zone" or "shear zone" that dissipates and redirects impact forces away from the user's head. The movements can be initially recoverable, and with sufficient force, lead to permanent structural changes that absorb energy.
• Potential Anticipation (35 U.S.C. § 102): This patent directly anticipates key elements of US9414635, particularly the concept of relative movement between helmet components to absorb forces. It teaches an "outer shell layer" (the discrete panels) and a "shear mechanism allowing the outer shell layer to slide relative to the inner shell layer" (the panels moving relative to one another to create a shear zone). The structural changes and movement of the panels inherently involve an "absorptive/dissipative material" in a functional sense, as energy is dissipated through deformation and friction. This directly anticipates the core inventive concept of claims 1, 9, and 17 regarding a shear mechanism between layers allowing relative sliding for energy absorption, especially against shear forces.

2. U.S. Pat. No. 5,815,846 (Calonge)

• Full Citation: US5815846A, "Resistant helmet assembly," issued to Tecno-Fluidos, S.L. on 1998-10-06.
• Publication/Filing Date: Priority Date: 1996-11-27; Publication Date: 1998-10-06.
• Brief Description: This patent describes an impact-resistant helmet assembly that includes a first material layer and a second material layer with a gas chamber between them for impact dampening. Additionally, a containment layer over the second material layer defines a fluid chamber containing a viscous gel. This gel provides resistance against disbursement from an impacted region, enhancing impact distribution and dampening.
• Potential Anticipation (35 U.S.C. § 102): Calonge describes a multi-layered helmet with "a first material layer coupled to a second material layer" and uses a "viscous gel" as an "impact dampening" and "impact distribution" means. While it doesn't explicitly focus on "sliding" as the primary mechanism, the presence of a viscous gel between layers inherently allows for shear deformation and energy dissipation, which can be seen as a form of an "absorptive/dissipative material" within a shear mechanism. This could potentially anticipate the "first energy transformer having a first absorptive/dissipative material" of claims 1, 9, and 17, and more specifically claims 5, 6, 13, and 14 which specify the material as a gel or fluid.

3. U.S. Pat. No. 5,956,777 (Popovich)

• Full Citation: US5956777A, "Helmet," issued to Grand Slam Cards on 1999-09-28.
• Publication/Filing Date: Priority Date: 1998-07-22; Publication Date: 1999-09-28.
• Brief Description: This patent discloses a helmet designed to protect the head by laterally displacing impact forces. It comprises a rigid inner shell, a resilient spacing layer surrounding the inner shell, and an articulated outer shell. The articulated outer shell consists of multiple discrete rigid segments connected by resilient members, allowing for lateral displacement of impact forces.
• Potential Anticipation (35 U.S.C. § 102): Popovich's patent teaches a "rigid inner shell" and an "articulated shell having a plurality of discrete rigid segments" connected by "resilient members" and separated by a "resilient spacing layer." The stated function of "laterally displacing impact forces" suggests relative movement between the articulated outer shell and the inner components, which functions as a "shear mechanism." The "resilient spacing layer" and "resilient members" act as "absorptive/dissipative material." This could potentially anticipate the multi-layer structure, the shear mechanism allowing relative movement, and the energy absorption elements found in claims 1, 9, and 17.

4. U.S. Pat. No. 6,434,755 (Halstead)

• Full Citation: US6434755B1, "Helmet," issued to Southern Impact Research Center, Llc on 2002-08-20.
• Publication/Filing Date: Priority Date: 1999-06-04; Publication Date: 2002-08-20.
• Brief Description: This patent describes a football helmet featuring liner sections of varying thicknesses and densities. The design allows softer, thicker sections to absorb less intense impacts by crushing, while harder, thinner sections prevent bottoming out during more severe impacts.
• Potential Anticipation (35 U.S.C. § 102): While Halstead's patent details a layered cushioning system for impact absorption through compression, it does not explicitly disclose a "shear mechanism allowing the outer shell layer to slide relative to the inner shell layer" to address rotational forces as claimed in US9414635. Its primary focus is on managing linear impact forces and preventing bottoming out with different foam densities. Therefore, it is less likely to anticipate the specific sliding shear mechanism, though it is relevant to the general concept of multi-layer cushioning and absorptive materials. It may be broadly relevant to the "absorptive/dissipative material" aspect but not the claimed function of sliding for rotational force impact.

5. WO2012109381A1 (Innovation Dynamics LLC)

• Full Citation: WO2012109381A1, "Helmet omnidirectional energy management systems," published by Innovation Dynamics LLC on 2012-08-16.
• Publication/Filing Date: Priority Date: 2011-02-09; Publication Date: 2012-08-16.
• Brief Description: This international patent application describes helmets equipped with omnidirectional energy management systems. These systems typically incorporate multiple layers that are designed to move relative to one another to attenuate various impact forces, specifically highlighting their effectiveness in managing rotational forces through the use of low-friction layers to facilitate this relative movement.
• Potential Anticipation (35 U.S.C. § 102): This reference is highly relevant and directly anticipates several key features of US9414635. It explicitly teaches "multiple layers designed to move relative to each other to attenuate forces, especially rotational forces." This directly corresponds to US9414635's claims of an "outer shell layer," an "inner shell layer connected to the outer shell layer through a shear mechanism allowing the outer shell layer to slide relative to the inner shell layer," and the objective of protecting against "rotational force impact while the outer shell layer is allowed to slide." The "low-friction layers" serve as the "first energy transformer having a first absorptive/dissipative material" that enables the sliding shear mechanism. Therefore, this patent application likely anticipates claims 1, 9, and 17, and potentially claims 2, 3, 10, 11, 18, and 19 which further define the shear mechanism as a shear layer and its connection through an energy transformer.