Sliding Sash Stop Device for Weather Sealing Control
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Solution Overview
Problem
Existing sliding sash assemblies for windows and doors lack efficient mechanisms to restrict movement between closed and open positions, particularly for intermediate positions that allow partial opening, which can compromise weather sealing and operational ease.
Innovation Solution
A sliding sash assembly with a stop device featuring a housing and depressible stop members that can move between retracted and advanced positions, allowing for precise control of sash movement by projecting into the travel path to restrict movement at specific positions, including a closed and partially-open position, using springs and push-activated latch mechanisms for operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a sliding sash assembly allows free movement between closed and open positions, then operational ease is improved, but weather sealing deteriorates due to inability to maintain precise stop positions
Solution Approach 1:
The stop members are designed to be movable between retracted and advanced positions, allowing the system to dynamically adjust its stopping characteristics. This enables the sash to move freely when stops are retracted while maintaining precise positioning when stops are advanced, thus resolving the contradiction between ease of operation and weather sealing.
Solution Approach 2:
The system changes the positional parameter of stop members (between retracted and advanced states) to control sash movement. By varying this parameter, the assembly can transition between allowing free movement for operational ease and maintaining fixed positions for weather sealing, thereby resolving the technical contradiction.
2Object-affected harmful factors
If stop members are positioned to restrict sash movement at intermediate positions, then weather sealing is improved, but device complexity increases due to additional control mechanisms
Solution Approach 1:
The stop device is segmented into multiple independent stop members (first stop member and second stop member) that can be controlled separately. This segmentation allows selective positioning of stops at different locations (closed position, partially-open position, or retracted) to control sash movement, achieving weather sealing without requiring a monolithic complex control system.
Solution Approach 2:
The housing acts as an intermediary structure that contains and guides the stop members, providing a organized framework for the control mechanism. This intermediary structure simplifies the overall device by consolidating the control functions within a unified housing, reducing the complexity that would otherwise be scattered across multiple separate components.
3Adaptability or versatility
If multiple stop positions are provided for customizable control, then adaptability is improved, but manufacturing precision requirements increase
Solution Approach 1:
By making stop members movable rather than fixed, the system provides adaptability through dynamic positioning. The stop members can be moved to different positions (retracted or advanced) to create different stop positions for the sash, allowing customizable control without requiring multiple precision-machined fixed components, thus reducing manufacturing precision requirements.
Solution Approach 2:
The stop members serve multiple functions: they can be positioned to restrict sash movement at the closed position, at intermediate partially-open positions, or retracted to allow full movement. This multi-functionality is achieved through a single movable component design rather than multiple specialized components, improving adaptability while simplifying manufacturing precision requirements.
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 solution enables precise control of sash movement, maintaining weather sealing and operational ease by allowing for customizable stop positions, ensuring effective restriction at closed and partially-open positions, enhancing the functionality and usability of sliding sash assemblies.
Implementation Method 1
The stop device includes a pair of springs in the housing, each spring biasing a corresponding stop member toward the advanced position
Data Source
AI summary
A sliding sash assembly for use as a door or window includes: (a) a frame defining a frame opening; (b) a pair of sashes mounted in the frame opening and slidable relative to each other along an opening axis between a closed position and an open position; and (c) at least one stop device including a housing and a pair of depressible stop members movably mounted in the housing. The stop members are spaced apart from each other along the opening axis. Each stop member is selectively movable independent of the other stop member between a retracted position in which the stop member is retracted into the housing and an advanced position in which the stop member projects from the housing for engagement with one of the sashes to restrict movement of the sashes relative to each other toward the open position.