Vacuum Device Positive Pressure Tank with Secure Lid Latching
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Solution Overview
Problem
Conventional vacuum cleaners are not effective in environments where the tank is under positive pressure, as debris can escape due to the airflow direction and lack of secure lid attachment mechanisms.
Innovation Solution
A new vacuum device design that redirects airflow to create positive pressure within the tank, using a redesigned lid with an inlet and outlet, and a positive-pressure cap to prevent debris egress, along with a latching mechanism to secure the lid, utilizing a pivoting element, clasp, and tensioner for secure closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the tank is operated under positive pressure to enhance mulching capability, then the vacuum device can effectively handle yard waste, but debris can escape through the inlet opening due to the pressure differential
Solution Approach 1:
The patent extracts the cap component to seal the inlet opening, preventing debris escape while maintaining positive pressure operation. The cap is a separate removable element that can be installed or removed as needed, isolating the sealing function from the main tank structure.
Solution Approach 2:
The cap acts as an intermediary element between the inlet opening and the tank interior, mediating the flow of air and debris. When installed, it blocks the opening to prevent harmful debris escape while allowing the positive pressure system to function.
2Ease of operation
If the lid is secured with a simple attachment mechanism for ease of operation, then the device is easy to use, but the lid may detach under positive pressure conditions
Solution Approach 1:
The latch mechanism incorporates a movable latch member that can transition between engaged and disengaged states. The spring element provides dynamic force to maintain engagement under varying pressure conditions, allowing the system to adapt to positive pressure while remaining easy to operate.
Solution Approach 2:
The lid attachment system is segmented into distinct components: the latch member, the spring element, and the engagement features on the lid and tank. This segmentation allows each component to perform its specific function independently while working together to provide secure attachment.
3Productivity
If the inlet opening remains open for airflow during positive pressure operation, then air can be drawn in effectively, but collected debris will blow out of the opening
Solution Approach 1:
The cap provides complete sealing of the inlet opening when installed, which is more than the minimum required to prevent debris escape. This excessive sealing action ensures that no debris can escape while the vacuum source maintains adequate airflow through the alternate inlet on the lid.
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 effectively prevents debris from escaping and ensures the lid remains securely attached, enhancing the vacuum device's functionality in positive pressure environments, such as mulching yard waste, by maintaining internal pressure and ensuring efficient operation.
Implementation Method 1
The vacuum source draws air into the vacuum device through the inlet. The air blows into the tank before being exhausted, leading to the interior of the tank being under positive pressure.
Implementation Method 2
A tensioner that is connected to the pivoting element pulls the bent arm against the terminal edge of the latch rim and thus holds the lid against the open rim. The tensioner has a handgrip and a threaded rod that extends from the handgrip though a hole in the pivoting element.
Data Source
AI summary
In a device that uses the tank from a conventional vacuum cleaner, the tank is under positive pressure. A cap fits over a tubular element inside the tank and closes the conventional air inlet. The cap has a peripheral wall that extends between a solid back and a front radial rim, and interior axial ribs. The lid is held by a latch that has an element that pivots with respect to the tank and the lid, and a clasp that has a bent arm. A tensioner pulls the bent arm. The tensioner has a threaded rod that extends from a handgrip though a hole in the pivoting element. A nut on the clasp receives a threaded end of the threaded rod, enabling the handgrip to be used to tighten the clasp. An outer wall of the latch is disposed outwardly of the threaded rod and the bent arm.