Conical Delivery Valve Seal for Hand Held Dispenser
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Solution Overview
Problem
Manually operated pumps for dispensing fluid substances experience leaks from the delivery valve when used in reduced pressure environments, leading to inconveniently high actuation force requirements for users.
Innovation Solution
The pump design incorporates a movable delivery valve element with a conical surface having an opening angle between 17° and 22°, optimized for easy assembly and operation, which reduces leaks and actuation force by ensuring a proper seal and efficient fluid dispensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the spring pressure on the delivery valve is increased to prevent leaks, then the sealing reliability is improved, but the actuation force becomes too high for convenient user operation
Solution Approach 1:
The invention changes the geometric parameter of the delivery valve from a spherical shape to a conical shape with a specific opening angle (17°-22°). This parameter change allows the valve to achieve reliable sealing through its conical surface geometry rather than relying solely on high spring pressure, thereby reducing the actuation force required while maintaining leak prevention
Solution Approach 2:
The invention applies a conical surface (a curved geometric form) to the delivery valve instead of a spherical shape. The conical surface with its specific opening angle creates an effective seal against the seat through its geometric configuration, eliminating the need for excessive spring pressure and reducing the force needed to actuate the pump
2Device complexity
If a spherical delivery valve is used, then the structure is simple, but leaks occur in reduced pressure environments
Solution Approach 1:
The invention replaces the spherical delivery valve with a conical valve featuring a conical surface with a specific opening angle. This geometric modification enables the valve to form an effective seal in reduced pressure environments while maintaining structural simplicity and ease of manufacture
3Ease of manufacture
If the conical surface opening angle is outside the 17°-22° range, then manufacturing is easier, but either sealing is insufficient or actuation force becomes too high
Solution Approach 1:
The invention establishes an optimal parameter range (opening angle of 17°-22°) for the conical surface that balances sealing efficiency and actuation force requirements. This parameter optimization ensures reliable sealing while maintaining acceptable ease of operation, with 20° being the preferred angle that achieves the best compromise between these competing requirements
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 leaks and reduces the force required to actuate the pump, making it easier to use while maintaining reliability and durability, with the optimal conical surface angle of 20° providing a balance between sealing and ease of operation.
Implementation Method 1
the movable element of the delivery valve has an at least partially conical surface adapted to be coupled with a corresponding surface of said second seat, in a manner such that due to the action of said spring, the movable element can be fit in said second seat
Implementation Method 2
the hollow stem housing in a second seat a movable element of a delivery valve loaded by a spring
Implementation Method 3
a piston being sealingly slidable inside the cup-shaped body in opposition to a return spring
Data Source
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AI summary
A manually operated pump for dispensing a fluid substance in which the movable element of the delivery valve has an at least partially conical surface adapted to be coupled with a corresponding surface of a seat of the delivery valve, in a manner so as to be fit therein due to the action of the spring that loads the movable element.