Archery Bow Riser with Elongated Tubes
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Solution Overview
Problem
Existing composite archery bows and risers face challenges in reducing weight, simplifying manufacturing, and lowering costs, as they often result in increased weight due to complex structures and labor-intensive manufacturing processes.
Innovation Solution
The archery bow and riser system incorporates elongated tubes made from high-strength fibers or metals, which are strategically positioned and connected using a riser handle, struts, and limb pockets to maintain structural integrity and facilitate lightweight construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If compound bows use larger, more massive metal risers to handle bending moments, then structural strength is improved, but weight increases
Solution Approach 1:
The riser is constructed from composite materials including carbon fiber reinforced polymers and aluminum alloys, combining the strength-to-weight ratio benefits of composites with the structural integrity needed to handle bending moments. This resolves the contradiction by providing sufficient strength while maintaining lightweight construction.
Solution Approach 2:
The invention changes the material parameters and structural configuration of the riser, using tapered sections, optimized wall thicknesses, and strategic reinforcement placement to achieve the required strength properties with minimal weight. The riser cross-section dimensions and material composition are optimized to provide necessary strength without excessive mass.
2Weight of moving object
If complete archery bow risers are produced from carbon and composites, then weight is reduced, but manufacturing complexity and labor intensity increase
Solution Approach 1:
The riser is divided into separate components including the riser body, limb pockets, and attachment fixtures that can be manufactured independently and then assembled. This segmentation simplifies the manufacturing process by allowing standardized production of individual parts rather than requiring complex one-piece molding or fabrication of the complete riser assembly.
Solution Approach 2:
The invention employs universal attachment fixtures and standardized mounting interfaces that can be used across different bow models, reducing the variety of custom components that need to be manufactured. This multi-functionality approach simplifies production by creating reusable parts and reducing overall manufacturing complexity.
3Strength
If complex structures of carbon plies and fixtures are used to attach limbs, then structural integrity is improved, but manufacturing time and labor intensity increase
Solution Approach 1:
The limb pockets and attachment fixtures are pre-formed as integral parts of the riser structure during the riser manufacturing process, rather than being added as separate steps. This preliminary action eliminates subsequent assembly operations and reduces manufacturing time while maintaining the structural integrity provided by properly formed attachment features.
Data Source
AI summary
An archery bow is provided including opposing limbs and a riser. The riser can include a riser handle and one or more primary riser elongated elements extending away from the handle to respective limbs. The primary riser elongated elements can be straight, elongated round or other shaped tubes, rods or bars constructed optionally from a composite or other material. Vents can be included in ports of the riser to facilitate escape of air when riser elongated elements are installed in those ports. The riser can include one or more mounts to facilitate attachment of accessories to the elongated elements. The elongated elements can be bonded, adhered or otherwise fixed to the riser handle, struts, lugs and/or limb pockets, which can be constructed from a metal such as aluminum, titanium or an alloy, and which can handle significant moments and forces transferred via the elongated elements.