Interchangeable Exit Device Latch Assembly With Universal Actuation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing door latch systems require separate systems for different latch head styles, leading to increased fabrication and inventory needs, and lack ease of repair or reconfiguration.
Innovation Solution
A door latch system with a universal actuating assembly that can interchangeably connect with various interchangeable latch assemblies, such as Pullman, star wheel, or mortise style, without requiring modification, using a compatible x-y-z coordinate system for secure mounting and actuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate door latch systems are used for different latch head styles, then each specific latch style can be optimized for its application, but fabrication and inventory requirements increase
Solution Approach 1:
The patent applies universality by designing a single actuating assembly with a standardized interface that can operate multiple types of latch heads (Pullman, star wheel, mortise, vertical rod). The actuating assembly includes a universal mounting bracket and actuating mechanism that can be configured to work with different latch styles through interchangeable components rather than requiring separate complete systems for each latch type.
Solution Approach 2:
The patent segments the door latch system into two independent modules: a universal actuating assembly and interchangeable latch head assemblies. This segmentation allows the actuating mechanism to be standardized while the latch heads can be customized for different applications. The modular design enables mixing and matching of components without requiring complete system replacements.
2Reliability
If dedicated door latch systems are manufactured for each latch head style, then proper functionality is ensured, but inventory and stocking requirements increase
Solution Approach 1:
The actuating assembly is designed as a universal component that can reliably operate all supported latch head styles through a standardized interface. This eliminates the need to manufacture and stock separate actuating assemblies for each latch type, reducing inventory variety while maintaining reliable functionality across all latch styles.
3Reliability
If entire door latch systems are replaced for repair or reconfiguration, then system integrity is maintained, but repair time and complexity increase
Solution Approach 1:
The segmented modular design allows individual latch head assemblies to be replaced without replacing the entire door latch system. The standardized interface ensures that when a latch head needs repair or reconfiguration, only that specific module needs to be swapped out while the universal actuating assembly remains in place, maintaining system integrity through consistent interfacing.
4Adaptability or versatility
If multiple complete door latch systems are fabricated for different applications, then specific application needs are met, but manufacturing complexity increases
Solution Approach 1:
The patent divides the door latch system into standardized and customizable segments. The actuating assembly is manufactured as a standardized universal component, while latch head assemblies can be manufactured in different styles to meet specific application needs. This reduces manufacturing complexity by standardizing the majority of components while allowing customization only where necessary.
Solution Approach 2:
The universal actuating assembly serves multiple application-specific functions through its ability to interface with different latch head styles. This eliminates the need to fabricate separate complete systems for each application, as the universal actuator can be paired with whatever latch style the application requires.
Data Source
AI summary
A door latch system comprises an interchangeable latch assembly for securing a door to a door frame. The interchangeable latch assembly comprises a head and a latch mounted to the head. The latch is moveable between latched and unlatched positions. A driven member is operatively connected to the latch, the driven member moveable to latch or unlatch the latch. The door latch system further comprises a universal actuating assembly removably couple-able to the interchangeable latch assembly. The universal actuating assembly comprises a mounting bracket and a driving member releasably coupled to the driven member. Actuation of the universal actuating assembly translates the driving member and the driven member, moving the latch to the unlatched position. A first interchangeable latch assembly may be swapped with a second interchangeable latch assembly without requiring modification of the universal actuating assembly.