Bowstring Silencer Asymmetric Arms Locking Flange

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Solution Overview

Problem

Existing bowstring silencers are ineffective in damp or wet weather, require tools for installation, and can negatively impact arrow velocity and bow performance due to their bulkiness and asymmetry.

Innovation Solution

A bowstring silencer with a central body, asymmetric arm portions that become symmetric upon installation, and a locking flange mechanism allowing easy hand installation and secure attachment to the bowstring, made from elastomeric materials like thermoplastic elastomer or silicon rubber, which maintains performance across various weather conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If traditional bowstring silencers (puffs, cat whiskers) are used to dampen vibration and reduce noise, then noise reduction is improved, but arrow velocity is negatively affected

Engineering Contradiction:

ImprovenoiseVSAvoidarrow velocity

Core Design Contradiction:

Object-affected harmful factorsVSSpeed

Solution Approach 1:

The silencer employs asymmetric arm portions (first arm portion and second arm portion) that are unequal in length or configuration. This asymmetric design creates more favorable aerodynamic conditions for the arrow during launch, reducing drag and maintaining higher arrow velocity compared to symmetric traditional silencers, while still effectively dampening string vibration and noise.

Inventive Principle:

Principle #4Asymmetry

2Object-affected harmful factors

If yarn or water absorptive fabric silencers are used, then vibration dampening is improved, but effectiveness decreases in damp or wet weather

Engineering Contradiction:

ImprovevibrationVSAvoideffectiveness in wet weather

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The silencer is constructed from elastomeric materials (such as thermoplastic elastomer or silicon rubber) rather than yarn or water absorptive fabrics. This material parameter change ensures that the silencer maintains its vibration dampening properties and structural integrity in damp or wet weather conditions, as elastomeric materials do not absorb water and retain their mechanical properties across varying humidity levels.

Inventive Principle:

Principle #35Parameter changes

3Object-affected harmful factors

If traditional silencer installation methods are used, then vibration dampening is achieved, but installation requires tools or bow press

Engineering Contradiction:

ImprovevibrationVSAvoidinstallation ease

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The silencer is divided into separable components including a central body portion, arm portions, and a locking flange. The locking flange features an opening that allows the arm portion to be wrapped around the bowstring and inserted through the central body, creating a modular assembly that can be easily installed by hand without requiring tools, bow presses, or complex installation procedures.

Inventive Principle:

Principle #1Segmentation

4Object-affected harmful factors

If bulky or asymmetric silencers are installed, then vibration dampening is improved, but bow performance is negatively affected

Engineering Contradiction:

ImprovevibrationVSAvoidsymmetry and compactness

Core Design Contradiction:

Object-affected harmful factorsVSShape

Solution Approach 1:

Inventive Principle:

Principle #4Asymmetry

5Object-affected harmful factors

If puffs constructed of water absorptive fabrics are used, then vibration dampening is improved, but installation and removal require bow press

Engineering Contradiction:

ImprovevibrationVSAvoidinstallation and removal ease

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The silencer effectively reduces noise and vibration, maintains arrow velocity, and ensures symmetrical installation to minimize shooting inaccuracies, while being lightweight and easy to install without tools.

Implementation Method 1

bowstring silencers that can be easily attached by hand to the bowstring of an archery bow... intended to dampen vibration and reduce noise

Methodology Applied

Scientific EffectVibration damping: Damping

Implementation Method 2

made from elastomeric materials like thermoplastic elastomer or silicon rubber

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS8839777B1Bowstring silencer

Publication Date: 2014.09.23 GOOD SPORTSMAN MARKETING LLC

AI summary

A bowstring silencer for mounting to a bowstring, buss cable or the like, includes a central body portion and a pair of arm portions that extend in opposite directions from the central body portion. A locking flange is associated with one of the arm portions and is adapted to extend through an opening in the central body portion when the silencer is installed. The first and second arm portions extend asymmetrically with respect to the central body portion prior to attachment to a bowstring, buss cable or the like, and extend at least generally symmetrically after attachment thereto.