Arrow Insert With Threaded Stem and O-Ring Retention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing arrow inserts with threaded stems fail to consistently retain arrow tips, leading to frequent replacements and loss of concentricity between the arrow shaft and tip, which affects shooting consistency.
Innovation Solution
An arrow insert with a threaded stem and a pair of O-rings is designed to prevent the arrow tip from loosening, featuring a barbed shank, O-ring grooves, and a threaded stem that securely attaches to the arrow shaft, ensuring consistent alignment and retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a threaded stem is used to retain an arrow tip, then the arrow tip can be easily attached and removed, but the arrow tip frequently loosens and requires frequent replacement
Solution Approach 1:
An O-ring is introduced as an intermediary element between the threaded stem and arrow tip. The O-ring sits in a groove on the threaded stem and engages with a groove in the arrow tip, creating a mechanical locking mechanism that prevents the arrow tip from loosening while maintaining the threaded attachment system's ease of use
Solution Approach 2:
The solution adds a radial dimension to the retention mechanism by incorporating O-rings that extend outward from the threaded stem. This radial extension creates additional contact points with the arrow tip grooves, transforming a simple axial threaded connection into a multi-dimensional locking system
2Adaptability or versatility
If the arrow tip is frequently replaced, then different tips can be used, but the threading compound is lost and concentricity is compromised
Solution Approach 1:
The O-ring locking mechanism performs preliminary action by preventing loosening during use. This ensures that when the arrow tip is removed for replacement, the threading compound remains intact on the threaded stem, maintaining concentricity for the next tip installation
Solution Approach 2:
The O-ring acts as a mediator that protects the threaded connection integrity. By bearing the load of preventing loosening, the O-ring preserves the threading compound and concentric alignment, allowing frequent tip changes without compromising precision
3Device complexity
If no locking mechanism is used, then the insert structure remains simple, but the arrow tip loosens during shooting
Solution Approach 1:
The O-ring serves as a minimal-complexity intermediary that provides reliable locking. Rather than designing a complex mechanical locking system, the patent uses simple elastomeric O-rings that engage with grooves, achieving reliable tip retention with minimal structural complexity
Solution Approach 2:
The O-rings are flexible elastomeric elements that conform to the groove geometry. This flexibility allows the locking mechanism to accommodate minor variations in threading and assembly while maintaining reliable retention, without requiring complex rigid mechanical structures
Data Source
AI summary
An arrow insert with threaded stem for retaining an arrow tip preferably includes an arrow tip and an arrow insert. The arrow tip may be a broadhead. The arrow tip includes tip portion formed on one end and a threaded tap formed in an opposite end thereof. An O-ring counter bore is formed in the opposite end. The arrow insert preferably includes a barbed shank, an arrow shaft contact portion, an end flange, an arrow tip locator, at least one O-ring groove and a threaded stem. The barbed shank extends from one end of the arrow shaft contact portion. The end flange extends from an opposing end of the arrow shaft contact portion. The arrow tip locator extends from the end flange. The threaded stem extends from the arrow tip locator. The at least one O-ring groove is formed in the arrow tip locator.