Cushion restoration method
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Solution Overview
Problem
Sofa cushions undergo foam deformation over time, leading to loss of elasticity, a concave appearance, and reduced comfort, making them less appealing and functional, prompting the need for either expensive new cushions or custom-made solutions.
Innovation Solution
A cushion restoring insert with a base panel and an elongated elastic member is placed within the existing cushion casing to counteract sagging, increasing the cushion's thickness and elasticity, and restoring its original shape by applying tension forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a cushion is used over time, then it provides seating comfort, but it undergoes foam deformation and loses elasticity
Solution Approach 1:
The patent changes the physical state of the cushion foam by applying heat and moisture (steam or water) to restore the foam's cellular structure. This parameter change reverses the deformation process by re-expanding the collapsed foam cells, thereby restoring elasticity and firmness to the cushion without replacing it entirely.
Solution Approach 2:
The patent utilizes phase transition of water (from liquid to vapor and back) to restore the cushion. Steam or hot water is applied to the cushion, causing the foam material to undergo thermal and moisture absorption that re-expands the foam cells. The phase change from vapor to liquid during the restoration process delivers the necessary energy and moisture to reverse foam deformation.
2Shape
If a cushion becomes compressed and deformed, then it loses its original shape, but replacing it with a new cushion is expensive
Solution Approach 1:
Instead of manufacturing a new cushion, the patent changes the physical parameters of the existing cushion foam through thermal and moisture treatment. This restores the foam's original density and shape characteristics, providing a cost-effective alternative to manufacturing replacement cushions while achieving the same aesthetic and functional results.
Solution Approach 2:
The cushion restoration process allows the existing cushion to serve itself by restoring its own properties. The foam material's inherent elasticity is activated through the application of heat and moisture, enabling it to self-recover its original shape and firmness without requiring external replacement or complex manufacturing processes.
3Strength
If an insert is placed within the cushion to restore shape, then the cushion's firmness is improved, but the device complexity increases
Solution Approach 1:
The patent extracts the restoration function from a complex mechanical insert system and instead applies it through a simple thermal-moisture treatment process. By removing the need for physical inserts, zippers, and complex assembly mechanisms, the solution achieves cushion restoration through a straightforward application of steam or hot water, significantly reducing device complexity while maintaining effectiveness.
Solution Approach 2:
The patent replaces a mechanical insert-based restoration system with a thermal-moisture-based system. Instead of using physical structures to mechanically push or pull the foam back into shape, the invention uses heat and moisture to chemically and physically recondition the foam material itself, achieving restoration through material property modification rather than mechanical force.
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 revitalizes the cushion's shape and comfort, eliminating sagging and providing a more aesthetically pleasing and supportive seating experience without the need for new cushions, offering a cost-effective alternative.
Implementation Method 1
an elongated elastic member positioned adjacent to the elevation and below the sitting surface of the deformable member, wherein the elongated elastic member comprises a material that mirrors the material properties of the deformable member
Implementation Method 2
The elongated elastic member (which can also be referred to as a 'posture zone') compresses in response to an applied force (e.g., when a person sits on the cushion), effectively supplementing the elasticity of the deformable member
Implementation Method 3
Once the cushion casing has been closed, the cushion restoring insert increases the volume within the cushion casing, thereby creating tension forces that flex and restore the cushion
Data Source
AI summary
Steps for using an insert to restore sagging sofa cushions are provided. Over time, the cushion develops a depression on a sitting surface of a deformable member and an elevation on a base surface of the deformable member. The cushion also suffers from reduced elasticity in the deformable member. Positioning the insert between a cushion casing and deformable member of the cushion allows for sagging areas of the cushion to be fixed. The cushion restoring insert thus addresses both aforementioned issues. An elongated elastic member with similar elasticity to the original cushion provides a like-new level of elasticity for the cushion. The cushion restoring insert also increases volume within the cushion casing, causing tension in combination with the cushion casing. This tension counteracts the depression and elevation, helping to return the cushion to a like new state.