Reusable Throwline Launcher Shell Casing With Threaded Reloading
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current throwline projectile shell casings are single-use, requiring press machinery for sealing and cannot be reloaded in the field, limiting the user's ability to achieve multiple successful launches.
Innovation Solution
A reusable breech-loaded shell casing with a threaded primer head that can be opened and sealed to allow reloading of propellant and muzzle-loading of throwline projectiles, enabling multiple launches without specialized equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If single-use shell casings are used, then the sealing of the high-pressure chamber is sufficient, but the shell casing cannot be reloaded or reused
Solution Approach 1:
The shell casing is divided into separable components: a reusable body and a removable primer cap. The primer cap can be unscrewed to access the high-pressure chamber for propellant reloading, then rescrewed to restore the seal. This segmentation enables both reloading capability and maintained sealing quality.
Solution Approach 2:
The primer cap transitions from a fixed sealed state to an open state during reloading operations, then returns to the sealed state. This dynamic opening and closing mechanism allows the chamber to be accessed for propellant insertion while maintaining sealing integrity when closed, enabling repeated use.
2Reliability
If press machinery is used to seal the high-pressure chamber, then the seal is sufficient, but specialized equipment is required
Solution Approach 1:
The shell casing incorporates a self-sealing mechanism where the primer cap with integrated seal elements creates the necessary seal when screwed onto the body. This eliminates the need for external press machinery, allowing users to seal and reload casings in the field using only manual screwing actions.
Solution Approach 2:
The sealing function is extracted from the main body and integrated into the removable primer cap assembly. This allows the seal to be independently managed - the cap can be removed for reloading and when reattached, the seal is automatically restored without requiring external sealing equipment.
3Ease of operation
If the threaded primer head is opened for reloading, then propellant access is enabled, but the seal must be restored
Solution Approach 1:
The primer cap serves as a dynamic seal that transitions between open and closed states. When unscrewed, it provides access to the high-pressure chamber for propellant reloading. When screwed back on, it restores the seal through integrated sealing elements, allowing the same component to enable both access and sealing.
Solution Approach 2:
The sealing function is merged with the primer cap structure itself rather than being a separate component. The cap incorporates seal elements that automatically engage with the chamber opening when the cap is screwed on, combining the functions of closure and sealing in a single integrated action.
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
Enables users to repeatedly fire throwline projectiles in the field by allowing access to and sealing of the high-pressure chamber, improving accuracy and efficiency in engaging distant or obstructed targets.
Implementation Method 1
the explosion of the propellant sealed in its high-pressure chamber urges the throwline projectile seated on the bowl-shaped cap
Data Source
AI summary
A reusable breech loaded shell casing for a muzzle loaded throwline projective launcher is disclosed. The reusable breech loaded shell casing has a body defining a combustion chamber, the body extending from a distal end to a proximal end, wherein the proximal end has internal body threading. A primer head movable between an open condition and a sealed condition sealing off the proximal end of the body, wherein the primer head defines a primer chamber for refillably housing a primer propellent. A push cap operatively associable with the distal end of the body, wherein the push cap defines a concavity for seating the muzzle loaded throwline projectile on the breech-loaded chambered reusable shell casing.