Power Assisted Bow Energy Storage and Relock Mechanism
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Solution Overview
Problem
Conventional compound bow systems require excessive force to fully charge, and existing solutions fail to maintain stored potential energy without releasing it when the user chooses not to discharge the bow.
Innovation Solution
An energy storage and relock mechanism featuring a charge cam and relock lever that locks potential energy in the bow, with a biasing member and relock cord allowing controlled release of stored energy, enabling users to store and manage energy efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional compound bow systems use cables and cams to store energy in the limbs, then the bow can launch projectiles at intended velocity, but the force required to fully charge the bow becomes too great for some users
Solution Approach 1:
The system performs preliminary action by automatically charging the bow limbs to a predetermined position using a motorized drive mechanism before the user pulls the drawstring. This pre-charging action stores a portion of the required energy in advance, reducing the force the user must apply during the drawing phase.
Solution Approach 2:
The patent replaces the traditional manual mechanical charging system with an automated motorized system. The motorized drive mechanism substitutes for the user's manual force application, automatically rotating the cams to charge the limbs to the predetermined position, thereby eliminating the need for the user to apply excessive force.
2Use of energy by stationary object
If compound bows allow a portion of output energy to be stored as potential energy prior to user pulling, then additional potential energy can be generated, but the system lacks capability to maintain stored potential energy when the user wishes to release the drawstring without releasing the energy
Solution Approach 1:
The system employs dynamic control through a motorized mechanism that can actively maintain the cams at the predetermined charged position. The motor can hold the system in equilibrium at the specific angular position, preventing unintended energy release while allowing controlled release when needed. This dynamic maintenance capability ensures reliability by keeping the stored potential energy stable until the user is ready to shoot.
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 mechanism allows users to store and lock potential energy in the bow, enabling easier operation and controlled energy release, addressing the issue of excessive force requirements and maintaining energy for later use.
Implementation Method 1
a biasing member configured to urge rotation of the charge cam in a second direction to allow rotation of the charge cam to release stored energy in the power assisted bow
Implementation Method 2
a relock lever configured to urge rotation of the charge cam in a first direction to lock potential energy in the power assisted bow
Data Source
AI summary
The present disclosure provides an energy storage and relock mechanism for a power assisted bow comprising a charge cam and a relock lever. The charge cam may be configured to store potential energy by rotating in a first direction. The relock lever may be configured urge rotation of the charge cam in the first direction to lock potential energy in the power assisted bow.