Movable Channel Reinforcements for Hurricane-Resistant Window Assemblies
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Solution Overview
Problem
Tilt sash windows fail to perform well in high winds, such as those from hurricanes, due to failed tilt latches and structural weaknesses in the window frames, and conventional reinforcement methods restrict the window's movement, interfering with emergency egress standards.
Innovation Solution
The introduction of movable channel reinforcements within the window jambs that provide additional support by distributing forces applied by the tilt latch bolts, allowing the reinforcements to move with the window sash without restricting its movement, thus enhancing the window's ability to withstand high winds while maintaining compliance with egress standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If fixed reinforcement members are added to the channels to strengthen the window frame, then the structural strength is improved, but the window sash movement is restricted
Solution Approach 1:
The patent applies the dynamics principle by making the reinforcement members movable rather than fixed. The reinforcement members are designed to move vertically along the channel walls, allowing them to adapt their position based on the sash location. This dynamic configuration enables the reinforcements to provide structural support when needed while clearing the way for full sash travel during operation, thus resolving the contradiction between strength and ease of operation.
2Reliability
If fixed reinforcement members are added to withstand high winds, then the reliability under high wind conditions is improved, but the emergency egress capability is worsened
Solution Approach 1:
The movable reinforcement members dynamically adjust their position to provide structural reinforcement during high wind events while clearing the channel space when the window needs to be opened for emergency egress. This dynamic behavior allows the system to adapt to different operational requirements, maintaining both reliability under stress and adaptability for emergency situations.
3Force
If reinforcement members are added to the channels, then the force distribution capability is improved, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the reinforcement function into multiple discrete movable members rather than using a single complex fixed structure. Each reinforcement member can independently move and distribute forces, simplifying the overall design while maintaining effective force distribution across the channel structure.
Data Source
AI summary
Channel reinforcements configured to move between open and closed location along with a window sash are described herein. The channel reinforcements may provide reinforcement to window jambs proximate the latch bolts that extend into jamb channels in the window jambs. The channel reinforcements may be coupled or uncoupled to the balances located in the window jambs.