Installation bracket and system for attaching a PTAC chassis into a wall sleeve
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Solution Overview
Problem
The existing method of attaching a PTAC chassis to a wall sleeve using screws is prone to screw stripping, loss, and misalignment, leading to a time-consuming installation process.
Innovation Solution
A bracket system with an elongated first wall section and perpendicular second wall section, featuring L or inverted T-shaped slots and engagement tabs, allows for secure attachment to the PTAC chassis and wall sleeve without screws, facilitating easy alignment and installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screws are used to attach the bracket to the chassis and wall sleeve, then the connection can be secured, but the installation time increases and screws can be lost or stripped
Solution Approach 1:
The patent removes screws entirely from the attachment system. Instead of using threaded fasteners that require alignment and threading, the design uses a bracket with integrated tabs that insert into slots and are secured with simple push-buttons or clips, eliminating the time-consuming screw installation process while maintaining secure connection.
Solution Approach 2:
The patent introduces an intermediary bracket structure that mediates between the chassis and wall sleeve. This bracket features slots and tabs that provide a standardized interface, allowing the chassis to be attached without direct screw fastening to the wall sleeve, thereby reducing installation complexity and time.
2Strength
If screws are used for attachment, then the bracket can be fastened securely, but screw stripping and misalignment problems occur
Solution Approach 1:
The patent employs dynamic adjustment features where the bracket can move or adjust during installation. The slots in the bracket allow for positional adjustment, and the push-button or clip fastening mechanism enables easy alignment without requiring precise pre-alignment of holes, thereby maintaining attachment strength while improving ease of operation.
Solution Approach 2:
The patent changes the attachment mechanism from fixed-hole screw fastening to a system with adjustable slots and tabs. This parameter change allows the attachment points to be repositioned within the slot length, accommodating misalignment issues while maintaining secure attachment through the tab-slot-clip mechanism.
3Ease of manufacture
If traditional brackets with multiple holes are used, then the chassis can be attached to the wall sleeve, but hole alignment between bracket and wall sleeve is difficult
Solution Approach 1:
The patent segments the attachment interface into multiple discrete elements: the bracket body, slots, tabs, and push-button fasteners. This segmentation allows each component to be optimized independently, with slots providing alignment tolerance and tabs providing positive engagement, thereby easing both manufacture and operation compared to traditional multi-hole bracket designs.
Data Source
AI summary
A bracket includes two vertically elongated portions at right angles to each other, providing a first wall portion and a second wall portion. The first wall portion includes a plurality of “L” or inverted “T” shaped slots. Fasteners are passed through these slots and into the side of the PTAC chassis, capturing the bracket on the slots in a floating arrangement. The second wall portion has at least two engagement tabs that extend forward from the second wall portion. The engagement tabs are sized to fit into corresponding slots at the front side edges of a wall sleeve. Once the tabs are in position through the slots, the bracket is moved downward, pushing the engagement tabs downward, capturing a portion of the wall sleeve between the engagement tab and the second wall portion of the bracket.