Vented Oil Cap With Separate Channels for Stable Oil Drainage
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Solution Overview
Problem
Existing methods for changing oil from small engine devices often result in oil leaks, environmental hazards, and unpredictable flow rates due to vacuum formation during oil drainage, posing safety and environmental risks.
Innovation Solution
A removable vented oil cap with an oil channel and offset vent channel to facilitate oil flow while venting gases, preventing vacuum formation by extending a vent tube beyond the oil level to maintain atmospheric pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealed oil cap is used to prevent leaks, then oil containment is improved, but vacuum formation during oil drainage causes unstable flow and complete drainage failure
Solution Approach 1:
The cap is segmented into separate functional channels: an oil channel for oil drainage and a vent channel for gas exchange. This segmentation allows the cap to simultaneously maintain sealing (prevent leaks) while enabling complete oil drainage through the dedicated vent pathway that prevents vacuum formation.
2Productivity
If the vent tube extends beyond the oil level to prevent vacuum formation, then oil drainage stability is improved, but device complexity increases
Solution Approach 1:
The vent channel is merged with the cap body structure, and the vent tube is integrated into this channel. This merging approach allows the vent tube to extend beyond the oil level for effective vacuum prevention while minimizing additional complexity by utilizing the existing cap geometry rather than adding separate complex venting mechanisms.
3Ease of repair
If a removable oil cap is used to facilitate oil changes, then ease of maintenance is improved, but oil leaks occur during the changing process
Solution Approach 1:
The vented oil cap acts as an intermediary device between the oil reservoir and the external environment during oil changes. It provides a controlled interface that maintains sealing to prevent leaks while allowing complete oil drainage through the integrated vent channel, thus facilitating easy maintenance without the harmful effect of oil leaks.
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
Ensures complete oil drainage without leaks, reducing safety hazards and environmental impact by maintaining stable oil flow and pressure balance during the oil change process.
Implementation Method 1
the vent tube defining an interior passage through which gas exchange occurs
Implementation Method 2
the cap body and the neck defining an oil channel extending from and through the bottom surface through the cap body and the neck to provide a continuous pathway for oil to flow
Implementation Method 3
a body portion having a hollow plug positioned around the body portion
Data Source
AI summary
Systems and methods for removing oil from an oil reservoir utilizing a removable vented oil cap are described. In an aspect, a cap includes, but is not limited to, a cap body including a body portion having a hollow plug positioned around the body portion, the cap body having a bottom surface; a neck extending from the cap body, the cap body and the neck defining an oil channel extending from and through the bottom surface through the cap body and the neck to provide a continuous pathway; and a vent tube coupled with the cap body and extending beyond the bottom surface of the cap body in a direction opposite the neck, the vent tube defining an interior passage, wherein the cap body further defines a vent channel offset and separate from the oil channel, the vent channel aligning with the interior passage to provide gas exchange.