Double Hung Window Sash Support with Clamping Flange
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Double hung windows, with independently moving top and bottom tiltable sashes, face challenges in structural integrity due to sash movement and tilting, which can lead to security issues and weatherproofing failures, especially under high wind conditions.
Innovation Solution
A safety and security support system is introduced, which limits the upward movement of the bottom sash and is mounted at the intersection of the top and bottom sashes. This system includes a longitudinal first member, a lateral second member, and a clamp with a clamping flange to secure the window frame, preventing unintended tilting and ingress/egress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the bottom sash is allowed to tilt inward for cleaning access, then ease of operation is improved, but security deteriorates due to potential unintended egress
Solution Approach 1:
The patent applies dynamics by making the sash tilting capability conditional rather than fixed. The sash can tilt when in the closed position for cleaning access, but automatically prevents tilting when opened beyond a certain distance. This dynamic adjustment of functionality resolves the contradiction between ease of operation and security.
2Reliability
If the bottom sash is limited to small opening distance for safety, then reliability is improved, but ease of operation deteriorates due to reduced venting capability
Solution Approach 1:
The patent implements a dynamic venting system where the sash can be opened to different distances based on operational needs. The support mechanism allows the sash to move freely within a safe distance limit while still providing adequate venting capability, thus maintaining both safety and ease of operation.
3Ease of operation
If the top and bottom sashes are allowed to move independently for ventilation flexibility, then ease of operation is improved, but structural integrity deteriorates under wind forces
Solution Approach 1:
The patent applies preliminary anti-action by installing a support mechanism that preemptively counteracts the structural weakness created by independent sash movement. The support, positioned at the intersection of top and bottom sashes, provides preliminary reinforcement before wind forces act on the window, preventing structural failure while maintaining operational flexibility.
4Reliability
If traditional vent stops are used to limit bottom sash opening, then reliability is improved, but device complexity increases due to additional components in the window channel
Solution Approach 1:
The patent applies the extraction principle by removing the traditional vent stop from the window channel and relocating the limiting function to a support mechanism mounted on the exterior surface of the window frame. This extraction simplifies the window channel by eliminating unnecessary components while maintaining the opening limit function.
Data Source
AI summary
A safety and security window support for a ventable double hung window which provides both limited opening of the bottom sash and structural integrity. The window support includes a longitudinal first member, a lateral second member secured to the first member, and a clamp configured to receive the first member and to be slidable along the length thereof. The clamp has a clamping flange for cooperating with the window frame to limit upward movement of the bottom sash.