Chair leg mountable coaster assembly
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Solution Overview
Problem
Existing chair leg stabilizers are too large to allow for efficient stacking of chairs, as they interfere with the ability to stack when used due to their circumferential size, which is necessary for distributing weight effectively over a larger area.
Innovation Solution
A plate is mounted to each chair leg, extending laterally and sized to reduce penetration into soft substrates like sand or dirt, allowing for stacking by maintaining the overall height of chairs without interference, using a moderately flexible material and couplers for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If chair leg stabilizers are made circumferentially larger to distribute weight over a larger area, then penetration resistance into soft substrate is improved, but stacking ability deteriorates due to interference with chair stacking
Solution Approach 1:
The coaster plate transitions from a traditional circumferential ring shape to a lateral extension shape that protrudes perpendicular to the chair leg axis. This dimensional change allows the weight distribution function to be achieved while maintaining a compact profile that does not interfere with vertical stacking of chairs.
Solution Approach 2:
The coaster plate employs an asymmetric design where the lateral extension creates an uneven distribution of material relative to the chair leg axis. This asymmetric configuration optimizes both the weight distribution capability and the stacking compatibility by positioning the extended portion away from the stacking interface.
2Stability of the object's composition
If plate size is increased to reduce penetration into soft substrate, then stability is improved, but overall height of stacked chairs increases
Solution Approach 1:
The coaster plate applies local quality enhancement by concentrating the stabilizing function at the lateral extension portion that contacts the soft substrate. The main body of the plate remains compact and close to the chair leg, ensuring that the overall height increase is minimal while still providing effective stability where needed.
Data Source
AI summary
A chair leg mountable coaster assembly includes a plate that is mountable to one of a plurality of legs of a chair. The plate extends laterally from the leg in a single direction that is orientated parallel to a plane that extends through bottom ends of the plurality of legs. The plate is one of a plurality of the plates, each of which is configured to be mountable to a respective one of the plurality of the legs so that each leg is engaged with one of the plates. The plates reduce penetration of the legs into a soft substrate, such as sand, dirt, and soil. The plates are sized to allow multiple ones of the chairs to be stacked without interference by the plates.