BCD Weight Pocket Liner for Low-Friction Pouch Handling
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Solution Overview
Problem
The challenge of inserting and removing weight pouches from buoyancy control device (BCD) weight pockets is exacerbated by high friction between canvas-type materials and rubber pockets, often requiring assistance, especially in emergency situations with limited visibility.
Innovation Solution
A weight pocket liner with a tubular body, semi-rigid tab, and fastening assemblies, designed to facilitate easy insertion and removal of weight pouches by maintaining the pocket opening and reducing friction, featuring waterproof fabrics and secure attachment mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If weight pouches are inserted into weight pockets using conventional methods, then the weight pouches can be secured in the BCD, but the high friction between canvas-type materials and rubber pockets makes insertion and removal difficult, often requiring assistance from another person
Solution Approach 1:
A liner is introduced as an intermediary component between the weight pouch and the weight pocket. The liner has a smooth interior surface that reduces friction contact with the canvas-type weight pouch, while its exterior surface interfaces with the rubber weight pocket. This mediator resolves the high friction problem by providing a low-friction contact surface for the weight pouch while maintaining secure attachment to the BCD.
Solution Approach 2:
The invention changes the surface friction parameter by using different materials for the liner's interior and exterior surfaces. The interior surface is designed with low friction properties to facilitate easy insertion and removal of weight pouches, while the exterior surface maintains adequate friction or mechanical attachment features to secure the liner to the weight pocket. This parameter modification directly addresses the friction issue without compromising attachment security.
2Reliability
If the weight pocket flap is designed to close securely, then the weight pouch is held firmly in place, but the flap tends to flop closed during insertion, creating an additional difficulty point
Solution Approach 1:
The liner is pre-attached to the weight pocket structure, with its top opening positioned and supported before the weight pouch insertion process begins. The boning structure is already in place to maintain the opening in an open state during the entire insertion operation. This preliminary preparation eliminates the need to manually hold the flap open, allowing the diver to focus solely on inserting the weight pouch.
Solution Approach 2:
The liner acts as a mediator between the weight pouch and the flap closure system. By providing structural support through its boning and attachment mechanisms, the liner maintains the opening geometry and prevents the flap from collapsing or flopping closed during insertion, thus resolving the conflict between secure closure and easy insertion.
3Ease of operation
If conventional weight pockets are used without additional support structures, then the design remains simple, but the pocket opening cannot be maintained in an open state, requiring constant manual support during insertion
Solution Approach 1:
The weight pocket system is segmented into distinct functional components: the original weight pocket structure, the detachable liner with its own support structure (boning), and the weight pouch. The boning is segmented into multiple pieces that can be independently attached to provide distributed support around the opening. This segmentation allows the support structure to be added only where needed without redesigning the entire weight pocket system.
Solution Approach 2:
The liner is constructed as a flexible tubular structure made from fabric or similar material, which can conform to the weight pocket geometry while providing structural support through its boning reinforcement. This flexible shell approach maintains the open state of the pocket opening without requiring rigid, complex mechanical structures, thus adding minimal complexity while achieving the desired functionality.
4Reliability
If emergency weight removal is attempted under deep water with limited visibility, then quick weight dump is critical for safety, but the high friction and flap closure issues significantly increase the difficulty and time required
Solution Approach 1:
The liner serves as a mediator that facilitates rapid weight pouch removal by providing a low-friction interface. During emergency situations, the diver can simply pull on the liner's pull tab or use the fastening assembly release mechanisms to detach the liner, and the weight pouch slides out easily due to the reduced friction between the pouch and the liner's interior surface, dramatically reducing removal time compared to direct extraction from the weight pocket.
Solution Approach 2:
The liner's design enables self-service emergency removal through features like the pull tab and automatic release mechanisms. When the diver pulls the pull tab or releases the fastening assemblies, the liner detaches from the weight pocket and the weight pouch is automatically freed, eliminating the need for complex manual manipulation or assistance from other divers during emergency situations.
Data Source
AI summary
A device to facilitate weight operation in a Buoyancy Control Device (BCD) is described. The device may include a tubular body made from waterproof fabrics. The tubular body may have an exterior, a top opening, and a bottom opening. The device may include a semi-rigid tab and a pair of fastening assemblies attached to the exterior of the tubular body. The top opening may have boning that supports the top opening in an open state. The top end of the semi-rigid tab is fixed to the exterior and is close to the top opening of the tubular body, the bottom end of the semi-rigid tab is in contact with the exterior as a result of a rigidity of the semi-rigid tab. The pair of fastening assemblies are positioned on opposite sides of the semi-rigid tab.