Manual Pneumatic Oil Pump with Pressure Control Valves
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Solution Overview
Problem
Conventional oil pumping devices are complex and inefficient, leading to contamination during oil drainage from automobile engines, and lack effective control over internal pressure for efficient suction and drainage.
Innovation Solution
A pumping device with an air inlet valve and slide switches that control internal pressure through air supply, allowing for both manual and pneumatic operation, featuring a relief valve, check valves, and floater switches to manage pressure and prevent overfilling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional oil pumping devices are used, then oil drainage function is provided, but the structure becomes complicated and operation efficiency decreases
Solution Approach 1:
The patent combines multiple functions (manual operation, pneumatic operation, pressure control, suction, and drainage) into a single integrated pumping device. The pump chamber serves as both the working chamber and pressure control chamber, eliminating the need for separate complex mechanisms for each function.
Solution Approach 2:
The pump chamber is designed to serve multiple purposes: it acts as the working chamber for oil suction and drainage, and simultaneously as the pressure control chamber for both manual and pneumatic operation modes. This multi-functionality reduces overall device complexity while maintaining high operation efficiency.
2Ease of operation
If simple oil drainage by removing drain plug is used, then operation is simple, but contamination occurs and efficiency is low
Solution Approach 1:
The patent introduces a controlled pumping system with check valves and pressure control mechanisms as intermediaries between the oil pan and the external environment. This intermediary system allows oil to be drained through a controlled path rather than free flow, preventing contamination while maintaining operational simplicity.
3Device complexity
If manual operation only is used, then device structure is simple, but operation efficiency and pressure control capability are insufficient
Solution Approach 1:
The patent makes the operation mode dynamic by allowing switching between manual operation and pneumatic operation based on needs. The air inlet valve and slide switch enable the system to adapt between different operation modes, providing efficient pressure control when pneumatic mode is used while maintaining simplicity when manual mode suffices.
4Productivity
If pneumatic operation is added, then pressure control and efficiency improve, but device complexity increases
Solution Approach 1:
The patent merges the pneumatic pressure control system with the existing manual operation system by using the same pump chamber for both functions. The air inlet valve connects to the pump chamber, allowing pneumatic pressure to be applied directly where manual pressure was previously generated, eliminating the need for separate complex pneumatic mechanisms.
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
Enables efficient and controlled oil suction and drainage with reduced contamination, utilizing manual or pneumatic operation to manage pressure effectively, and includes safety features to prevent overfilling.
Implementation Method 1
When the pump chamber is in communication with the atmosphere through the first slide switch, the piston is reciprocally moved to suck oil into the pump chamber
Implementation Method 2
the relief valve 12...having a predetermined releasing pressure...When a pressure inside the container body 1 exceeds a predetermined threshold, the spring force of the biasing element 121 is overcome by the internal pressure and the valve body is moved upward to open the hole 120 thereby releasing the internal pressure
Implementation Method 3
A check valve 152 is mounted to an outer end opening of the first channel 15
Implementation Method 4
A first floater switch 2...A second floater switch 6...both floater switches 2, 6 are driven upward by the buoyancy thereof to block the channels for air
Data Source
AI summary
A pumping device includes a container having a cover structure. A piston is movably received in the container and is manually operable. The cover structure has an air inlet valve and a slide switch, which, when properly set, allow air to be sucked into or expelled out of the container by the manual operation of the piston to increase or decrease the internal pressure of the container for oil suction and oil drainage. The pumping device also includes another slide switch, whereby when both slide switches are properly set, the internal pressure of the container is increased or decreased due to the supply of pressurized air from an external source and oil can be sucked into and drained out of the container accordingly.