Water Heater Strap Buckle for Secure Seismic Restraint
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Solution Overview
Problem
There is a need for a restraint system that can securely and easily be installed to prevent water heaters and other containers from tipping over or moving excessively during earthquakes or impacts, while allowing for fast adjustment.
Innovation Solution
A flexible strap restraint system with end brackets and a buckle mechanism that allows for adjustable length and tension, featuring a locking device to secure the strap in place, which can be integrated into the brackets or used separately with a double-ended buckle for positioning flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a restraint system is designed to be secure and adjustable, then the reliability of preventing water heater movement is improved, but the device complexity increases
Solution Approach 1:
The buckle mechanism integrates multiple functions into a single device: the spring tab provides friction engagement with the bar for adjustable positioning, while the locking tab engages with the bar to secure the restraint. This merging of adjustment and locking functions into one buckle assembly reduces the number of separate components needed while maintaining security and adjustability.
Solution Approach 2:
The bar serves multiple functions: it acts as a friction surface for the spring tab to engage for adjustment, a locking surface for the locking tab to secure the position, and a structural element that transmits the restraining force. This multi-functionality reduces the need for separate adjustment mechanisms and locking devices, simplifying the overall system while maintaining reliability.
2Ease of operation
If a restraint system allows fast adjustment of strap length, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The spring tab is designed to be resilient, allowing it to dynamically engage and disengage from the bar. During adjustment, the spring tab can be pushed to release the strap, then springs back to engage with the bar at the desired position. This dynamic behavior enables fast, tool-free adjustment while keeping the mechanism simple through the use of elastic deformation rather than complex mechanical components.
Solution Approach 2:
The spring tab automatically maintains engagement with the bar through its resilient nature, providing self-locking during normal use. The friction between the spring tab and bar, combined with the geometric interference, creates a self-sustaining engagement that requires no additional locking mechanisms for routine adjustment, simplifying the operation while maintaining security.
3Reliability
If a locking mechanism is provided to fix the strap length, then the reliability of the restraint is improved, but the ease of operation deteriorates
Solution Approach 1:
The locking tab is pre-positioned and spring-loaded to automatically engage with the bar when the strap is tensioned. This preliminary positioning and automatic engagement reduce the operational steps required for locking, as the system prepares the locking action in advance through the spring mechanism rather than requiring manual intervention for each locking operation.
Solution Approach 2:
The locking mechanism replaces complex multi-component mechanical locking systems with a simple tab-and-slot geometry combined with friction and elastic deformation. The locking tab engages with the bar through geometric interference and friction, eliminating the need for threads, cams, or multiple moving parts, thereby simplifying the operation while maintaining reliable locking.
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 system effectively secures water heaters and other equipment by providing a secure, adjustable, and easy-to-install restraint that prevents unwanted movement during seismic events or impacts, ensuring safety and stability.
Implementation Method 1
The first tang is resiliently positioned at an angle with respect to the base plate... as a tension load on the second end of the first strap increases, the first bar is moved toward the first slot
Implementation Method 2
The first bar is moved toward the first slot as a tension load on the second end of the first strap increases. That movement helps lock the strap to the buckle
Data Source
AI summary
A water heater restraint has brackets and a buckle to allow a flexible strap to hold a water heater to a support. The bracket has two slots separated by a bar with one end of the strap threaded through the slots to form a loop encircling the bar so that friction or stitching holds the loop from unthreading. A buckle has two similar slots separated by a bar all located on a spring tang with access occurring through a slot in a base plate, so that when the bar is moved toward the base plate the strap is bound between the base plate and the spring tang to restrain motion of the strap. A projection on either the spring tang or on a sidewall extension of the base plate provides a releasable locking mechanism to lock the spring tang in position and lock the strap against movement.