Press membrane and device comprising such a membrane for removing water from laundry
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Solution Overview
Problem
Existing dewatering devices with press membranes face challenges in easily attaching and detaching the fastening ring, which is often heavy and difficult to handle, and require a permanent connection that necessitates replacing the fastening ring with the press membrane, leading to complexity and potential leaks.
Innovation Solution
The device features a membrane collar with internal projections that serve as temporary supports for the fastening ring, allowing it to be inserted from above and held in place until secured to the stamp plate, eliminating the need for separate handling and enabling a detachable connection without permanent attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fastening ring is permanently connected to the press membrane (vulcanized), then the connection is secure and reliable, but the fastening ring must be replaced every time the press membrane is replaced even though it is not subject to wear
Solution Approach 1:
The patent divides the fastening system into separate components: the fastening ring and the press membrane are no longer permanently connected but can be separated. The fastening ring remains on the press membrane holder while the press membrane can be independently replaced, allowing the fastening ring to be reused with new membranes.
Solution Approach 2:
The fastening ring is designed to be recovered and reused instead of discarded. When the press membrane wears out, only the membrane itself is replaced while the fastening ring remains in place and can be used with the next press membrane, reducing waste and maintenance costs.
2Strength
If the fastening ring is made heavy for structural stability, then it provides sufficient support, but it becomes difficult for technicians to handle and position
Solution Approach 1:
The fastening ring is pre-positioned on the press membrane holder before the press membrane is installed. This preliminary positioning allows technicians to work with a lighter component that doesn't need to support the full weight of the press membrane during installation, making handling easier while still providing structural stability when assembled.
3Reliability
If an additional seal is added to prevent fluid leakage, then sealing reliability is improved, but the device becomes more complex and may still lead to leaks
Solution Approach 1:
The patent removes the complex additional seal system from the design. Instead of adding seals to prevent fluid escape, the invention relies on the proper positioning and mechanical connection of the fastening ring and press membrane components, simplifying the structure while maintaining sealing effectiveness through the inherent design of the membrane collar and holder interface.
Data Source
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AI summary
Devices for draining washed laundry (10) have a pressure diaphragm (19). The pressure diaphragm (19) is detachably attached to a piston plate (18) of the device by means of a retaining ring. This connection is very complex due to the high weight of the pressure diaphragm (19), which has a diameter of approximately 1 m. To facilitate the attachment of the pressure diaphragm (19) to the retaining ring under the piston plate (18), the pressure diaphragm (19) is provided with at least one internal projection on its diaphragm collar, which forms a bearing for the retaining ring (32) during the assembly of the pressure diaphragm (19) under the piston plate (18). This temporarily supports the retaining ring during the assembly of the pressure diaphragm (19) under the piston plate (18), thus simplifying the assembly of the pressure diaphragm (19) under the piston plate (18).