Ostomy Appliance Outlet Nesting for Silhouette and Leakage
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Solution Overview
Problem
Existing ostomy appliances often have mechanisms for draining the collecting volume that can be cumbersome, particularly for urostomy and ileostomy users, as they require a tap for emptying, which may not be suitable for liquid waste and can affect the appliance's silhouette under clothing.
Innovation Solution
The ostomy appliance features an internal collecting volume with a valve that has a closed condition to prevent waste from exiting and an open condition to allow waste to exit, housed within a support panel that provides a stowed position for the outlet portion, enhancing user comfort and appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a tap mechanism is provided for draining the collecting volume, then waste can be emptied without removing the entire appliance, but the mechanism becomes cumbersome and affects the appliance's silhouette under clothing
Solution Approach 1:
The outlet portion is nested within the support panel structure, allowing it to be stored in a stowed position within the appliance body when not in use, thereby maintaining a smooth silhouette under clothing while still providing access when needed
Solution Approach 2:
The outlet portion is designed to be movable between a stowed position (for maintaining silhouette) and an extended position (for emptying), allowing the appliance to adapt its shape dynamically based on operational needs
2Reliability
If a valve is provided to prevent waste from exiting, then leakage is prevented during use, but the device complexity increases
Solution Approach 1:
The valve is integrated into the outlet portion structure itself, utilizing the natural movement and positioning of the outlet portion to control waste flow, thereby reducing the need for separate complex valve mechanisms while maintaining reliable leakage prevention
Data Source
AI summary
A misting system having a reservoir containing a fluid to be delivered to a target connected to a plurality of nozzles. The nozzles are configured to supply a mist of the fluid to a target when the fluid pressure is above a threshold pressure. In order to provide sufficient fluid pressure, the misting system also has a mechanical misting pump between the reservoir and the plurality of nozzles that can be activated by a user. The misting pump has a body for containing a dose of the fluid, where the body has a port through which fluid is received from the reservoir when the misting pump is primed and through which expelled fluid flows towards the plurality of nozzles when the misting pump is activated. In the body is a moveable piston that moveable between a primed position and positon in which a dose of the fluid is expelled from the body through the port. The misting pump also has an actuator coupled to the piston and configured to drive the piston to expel the dose of fluid out of the port at a pressure that is greater than the threshold pressure when activated, and the misting pump also has a biasing spring to bias the piston in a primed position when the actuator is not activated. The actuator furthermore has a pivoted handle coupled to the piston operable by a user to activate the misting pump and dispense a dose of the fluid, the handle being configured to have a mechanical advantage that is sufficient to drive the piston a sufficient distance from the primed position to generate sufficient pressure in the fluid to dispense the dose of the fluid in a single motion of the handle.