Door Stopper With Deformable Piston For Floor Protection

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Solution Overview

Problem

Current door stopping devices are inconvenient to position, can damage floors, and often fail to adequately stop doors in open positions, particularly on prestigious surfaces like parquet floors, and may obstruct passage.

Innovation Solution

A door stopping device featuring a movable stop piston made of deformable materials with a high coefficient of friction, connected to a strut and activated by an elastic element through a handle, which exerts pressure on the floor to stabilize the door in any open position without damaging the floor and allowing easy activation and deactivation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If door stopping devices are positioned on the lower portion of the door, then they can effectively stop the door, but they are inconvenient to position and may obstruct passage

Engineering Contradiction:

Improvedoor stopping effectivenessVSAvoidpositioning convenience

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The stopping device is mounted on the upper portion of the door rather than the lower portion, changing the vertical dimension of application. This allows the door to rotate around the hinge axis while the stopping mechanism operates from above, preventing passage obstruction and improving accessibility without compromising stopping effectiveness

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Reliability

If traditional door stopping devices are used on prestigious floors, then they can stop the door, but they can damage the floor surface

Engineering Contradiction:

Improvedoor stopping effectivenessVSAvoidfloor damage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

A soft stopping element made of elastomeric material is introduced as an intermediary between the door and the floor. This material deforms under the door's weight and friction forces, providing effective stopping while distributing pressure to prevent damage to prestigious floor surfaces like parquet

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The stopping element uses materials with specific physical properties (high friction coefficient, elastomeric characteristics) that change the interaction parameters between the door and floor. The material's deformability and friction properties enable effective stopping without the high contact pressures that cause floor damage

Inventive Principle:

Principle #35Parameter changes

3Ease of operation

If door stopping devices are positioned to be easily accessible, then they are convenient to use, but they may obstruct passage through the door

Engineering Contradiction:

Improveactivation convenienceVSAvoidpassage obstruction

Core Design Contradiction:

Ease of operationVSArea of stationary object

Solution Approach 1:

The device is mounted on the upper portion of the door, utilizing the vertical space above the door opening rather than occupying the horizontal passage area. This dimensional relocation maintains ease of operation through the integrated handle mechanism while eliminating obstruction of the door passage

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

4Force

If the stop piston is made of hard material, then it can effectively stop the door, but it can damage the floor surface

Engineering Contradiction:

Improvestopping forceVSAvoidfloor damage

Core Design Contradiction:

ForceVSObject-affected harmful factors

Solution Approach 1:

The stopping element transitions from hard to soft material with high friction coefficient and elastomeric properties. This parameter change maintains sufficient stopping force through friction and deformation while distributing contact pressure to prevent floor damage. The material's ability to deform and conform to the floor surface enables effective stopping without concentrated loads

Inventive Principle:

Principle #35Parameter changes

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 device is simple to use, self-adjusts to maintain consistent stopping force regardless of initial position, does not damage floors, and effectively stabilizes doors in open positions without obstructing passage, addressing the drawbacks of existing solutions.

Implementation Method 1

a stop piston (5) which is movable through the handle (3) in a manner such that at least one component of said movement is in a direction substantially perpendicular to the plane on which the surface of the floor (20) extends

Methodology Applied

Scientific EffectFriction: Friction

Implementation Method 2

an elastic element (6), moved through the handle (3) and connected to the strut (9)

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentEP2281989B1Stopping device for doors and the like

Publication Date: 2011.03.23 BRUNETTO SANTINO

Figure 1a~1b
Figure 1c~1d
Figure 2a~2b

AI summary

There is provided a stopping device (1) for a door (2) and the like, the door (2) comprising at least one handle (3) and at least one lock (4), the handle (3) being suitable to control the lock (4), the stopping device (1) being disposable in a stop position, in which it is suitable to allow stopping of the door (2) disposed in an open position, and in a released position, in which it is suitable not to interfere with the movement of the door (2), and it is activatable by means of the handle (3).