Flushometer Cover Assembly Locking Mechanism
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Solution Overview
Problem
Conventional cover assemblies for automatic flushometers are difficult to install and often fail to adequately protect the flushometer from foreign objects and elements, potentially creating leak paths.
Innovation Solution
A cover assembly featuring a locking ring and cover design that allows for easy installation and secure fastening, with a locking mechanism using a set screw to prevent movement along the rotational axis, providing enhanced protection and aesthetic appeal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional housing is used for the automatic flushometer, then the electronic components are enclosed and protected, but the housing is difficult to install and may create additional leak paths
Solution Approach 1:
The housing is divided into a cover and a body portion that can be separately assembled. The cover can be installed by simply placing it over the body portion without complex fastening operations, making installation easier while still providing complete enclosure and protection of the electronic components
Solution Approach 2:
The locking mechanism is extracted as a separate feature (protrusion and groove) from the main housing structure. This allows the cover to be easily installed and removed without requiring threading or complex fastening operations, reducing installation difficulty while maintaining secure attachment
2Reliability
If a conventional housing is used for the automatic flushometer, then the electronic components are enclosed, but the housing fails to adequately protect the flushometer from foreign objects and elements
Solution Approach 1:
The housing is segmented into a cover and body portion with a clear sealing interface. The gasket is positioned at this interface to provide comprehensive sealing around the entire perimeter, ensuring protection from foreign objects and elements while allowing easy assembly and disassembly
Solution Approach 2:
The sealing capability is concentrated at the critical interface between the cover and body portion through the use of a gasket. This localized sealing approach provides adequate protection from foreign objects and elements without requiring complex sealing structures throughout the entire housing
3Ease of operation
If the cover is allowed to move freely relative to the locking ring, then installation is easier, but the cover cannot remain securely fastened
Solution Approach 1:
The fastening function is segmented into two distinct phases: a free movement phase during installation (when the protrusion aligns with the groove) and a locked phase (when the protrusion engages the groove). This segmentation allows easy installation while ensuring secure fastening in the final position
Solution Approach 2:
The protrusion and groove act as intermediary mechanical features that mediate between the cover and locking ring. During installation, the protrusion guides the cover into position; once positioned, the protrusion engages the groove to prevent movement, providing both ease of installation and secure fastening
Data Source
AI summary
A cover assembly for an automatic flushometer includes a locking ring configured for coupling to a flush valve body and configured to be disposed about a rotational axis. The locking ring defines a recess in a radially outer perimeter. A cover defines an opening at one end and a cavity configured to receive a solenoid of the flushometer. The cover has a projection extending radially inwardly from a radially inner surface of the cover. The projection defines a circumferential groove. The projection is configured to allow movement of the cover relative to the locking ring along the rotational axis when aligned with the recess in the locking ring. The groove is configured to receive a portion of the locking ring circumferentially adjacent to the recess upon rotation of the cover about the rotational axis thereby preventing movement of the cover relative to the locking ring along the rotational axis.