Stun Grenade Sealed Chamber Design for Water Resistance
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Solution Overview
Problem
Stun grenades often lose reliability when submerged in water, and multi-time-delayed charges can experience premature ignition due to sympathetic ignition of payload materials.
Innovation Solution
The design includes a housing with a delay chamber and series of payload chambers, where each payload chamber is sealed and connected to the delay chamber via offset ports, preventing water ingress and ensuring sequential ignition through a fuze system, reducing the likelihood of premature ignition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If stun grenades are used in water environments, then the operational capability is maintained, but water ingress causes loss of reliability
Solution Approach 1:
The grenade is divided into separate sealed chambers (delay chamber and multiple payload chambers) that are isolated from each other and from the external environment. This segmentation prevents water from compromising the entire device if it penetrates one chamber, thereby maintaining reliability in water environments.
Solution Approach 2:
Offset ports serve as intermediaries between the delay chamber and payload chambers, positioned to prevent direct water pathways while allowing controlled ignition. The sealed chambers act as intermediaries that isolate payload materials from water ingress, enabling water environment operation without sacrificing reliability.
2Object-generated harmful factors
If multiple payload chambers are connected to the delay chamber, then enhanced light and sound effects are produced, but sympathetic ignition causes premature ignition
Solution Approach 1:
The ports connecting the delay chamber to payload chambers are deliberately offset from one another in asymmetric positions. This asymmetric arrangement ensures that the flame front from ignition must travel through the delay chamber and reach each port at distinct times, preventing simultaneous ignition and sympathetic ignition of multiple payload chambers.
Solution Approach 2:
The offset ports are positioned at different longitudinal and circumferential locations, adding spatial dimensionality to the ignition sequence. This dimensional separation ensures that ignition propagates through the delay chamber in a controlled sequence rather than simultaneously affecting all payload chambers, thereby maintaining reliable timing control while producing enhanced cumulative effects.
3Reliability
If ports are positioned for sequential ignition, then reliable time-delayed activation is achieved, but housing fragmentation may occur during ignition
Solution Approach 1:
The housing is segmented into separate sealed chambers for the delay mechanism and payload materials. This segmentation contains the ignition and deflagration events within individual chambers, preventing the force from compromising the overall housing structure and reducing fragmentation while maintaining reliable time-delayed activation through the offset port configuration.
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
This configuration enhances the reliability of stun grenades even when submerged in water and allows for multiple, time-delayed charges to ignite predictably, producing enhanced light and sound effects without fragmenting the housing.
Implementation Method 1
The fuse may ignite a column of delay material, which is formulated to provide a delay before a flame front in the delay material reaches an aperture in communication with the payload material
Implementation Method 2
The flash temporarily blinds and the loud blast temporarily causes loss of hearing and loss of balance in those in the vicinity when a stun grenade is ignited
Data Source
AI summary
Stun grenades may include a fuze configured to ignite a delay material secured to a housing including a delay chamber in which the delay material is located. A handle of the fuze may be located over a final payload chamber of the series of payload chambers, payload material in the final payload chamber being configured to ignite after ignition of payload material in each other payload chamber of a series of payload chambers. Methods of assembling stun grenades may involve positioning an obstruction in a port extending between a delay chamber and a payload chamber of a series of payload chambers surrounding the delay chamber in a housing. A delay material may be packed in the delay chamber. The obstruction may be removed, and a payload material may be positioned in the payload chamber and the port.