Kayak Bulkhead System with Adjustable Straps and Friction Mount
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Solution Overview
Problem
Existing kayak bulkhead systems are either prone to foot slippage and loss of control due to limited adjustability and structural integrity, or they lack non-slip fixed positioning, especially in whitewater conditions, and are not optimized for composite kayaks.
Innovation Solution
A bulkhead system using flexible straps with strap adjusting hardware and looped anchor points, allowing for adjustable positioning while seated, combined with a floating bulkhead design that utilizes friction points and a rebounding stretch cord for secure foot support, suitable for various kayak materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional stationary bulkhead system with rigid rails and mechanical fasteners is used, then structural integrity and non-slip fixed positioning are improved, but adjustability and ease of operation deteriorate
Solution Approach 1:
The bulkhead system transitions from a static fixed position to a dynamic adjustable position. The bulkhead can be moved along the longitudinal axis of the kayak and secured at multiple positions using the ratchet mechanism, allowing users to adjust footrest position while maintaining structural integrity through the flexible strap system anchored to the hull.
Solution Approach 2:
The system changes the physical state of the bulkhead from fixed to movable by introducing flexible straps instead of rigid mechanical fasteners. The ratchet mechanism allows the bulkhead to be secured at different positions along the kayak, changing the positional parameter while maintaining reliability through the ratchet's locking action.
2Ease of operation
If a rope-based adjustable bulkhead system is used, then ease of operation and adjustability are improved, but reliability and anti-slip performance deteriorate
Solution Approach 1:
The traditional rope-and-cleat mechanical system is replaced with a ratchet mechanism that provides more reliable locking. The ratchet mechanism prevents the bulkhead from slipping forward under pressure while still allowing easy adjustment from the seated position, combining the ease of operation with improved reliability.
Solution Approach 2:
The bulkhead is extracted from the bow wall structure and independently anchored to the kayak hull using flexible straps. This separation allows the bulkhead to be secured directly to the hull at multiple points, improving non-slip performance while maintaining adjustability through the ratchet system.
3Reliability
If rigid mechanical fasteners are used for bulkhead attachment, then structural integrity is improved, but device complexity and difficulty of repair deteriorate
Solution Approach 1:
Rigid mechanical fasteners are replaced with flexible straps that anchor the bulkhead to the kayak hull. The flexible straps provide sufficient structural integrity while simplifying the attachment system, allowing easy adjustment and repair without complex mechanical components.
Solution Approach 2:
The ratchet mechanism is designed to be operated from the seated position without requiring external tools or complex assembly procedures. Users can independently adjust and secure the bulkhead at any position, simplifying both operation and potential repair.
4Device complexity
If the bulkhead is supported entirely by the bow wall structure, then device complexity is reduced, but reliability deteriorates due to single-point failure risk
Solution Approach 1:
The bulkhead support system is segmented into multiple independent attachment points along the kayak hull rather than relying on a single bow wall structure. The flexible straps are anchored at multiple locations, so failure at one point does not compromise the entire system, improving reliability while maintaining relative simplicity.
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 secure, adjustable foot support under extreme conditions, maintaining control and stability without the need for external tools, and accommodates different kayak materials and designs.
Implementation Method 1
a rebounding stretch cord for secure foot support
Implementation Method 2
utilizes friction points
Data Source
AI summary
The present invention is directed an adjustable foot rest system for a kayak comprising a bulkhead member adapted for cinchable non-slip support of the feet and on the fly user positioning. A mounting sleeve in the bow wall and/or runners are provided with the bulkhead resting inside the sleeve and/or runners by friction alone. Flexible straps equipped with strap adjusters are connected to the bulkhead, through guide anchors and secured to anchors affixed to the inside hull of the kayak near the seat. A bungee cord is threaded through an anchor disposed near the end of the bow and connected on each side to the bulkhead cross member, whereby the bulkhead position as selected by the user remains in place until the user selects a new position.