Gravity-Biased Pivoting Door Stopper for Automatic Closure Prevention

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Solution Overview

Problem

Existing door stoppers require operator intervention to activate and maintain their operating position, which can be impractical or unsafe when caregivers are distracted by attending to small children, the elderly, or pets, as they may not consistently prevent door closures effectively.

Innovation Solution

A gravity-biased door stopper with a pivoting arm that automatically moves from a storage position to an operating position when the door is opened, using a base plate and pivoting axle mechanism to prevent door closure without requiring continuous operator diligence.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a door stopper requires operator intervention to activate and maintain its operating position, then the device can be reliably positioned to prevent door closure, but the effectiveness is reduced when caregivers are distracted by attending to small children, the elderly, or pets

Engineering Contradiction:
Improvedoor closure preventionVSAvoidoperator intervention requirement
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The door stopper is designed to automatically activate and position itself without operator intervention. When the door is opened, the stopper mechanism self-activates to prevent door closure, eliminating the need for caregivers to manually operate the device while attending to children, the elderly, or pets.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The door stopper is pre-positioned in a ready state that allows it to automatically engage when the door is opened. The mechanism is prepared in advance to detect door opening and automatically activate, ensuring door closure prevention is already in place before the caregiver needs to focus on other tasks.

Inventive Principle:
Principle #10Preliminary action

2Ease of operation

If a door stopper automatically activates when the door is opened, then the ease of operation is improved and caregiver workload is reduced, but the device complexity increases with the pivoting arm and gravity-bias mechanism

Engineering Contradiction:
Improveautomatic activationVSAvoidpivoting arm mechanism
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The door stopper utilizes gravity-bias, changing the operational parameter from manual positioning to gravity-driven automatic positioning. The pivoting arm mechanism leverages gravitational force to automatically move the stopper into its operational position when the door is opened, simplifying operation while using a relatively simple mechanical structure.

Inventive Principle:
Principle #35Parameter changes

3Stability of the object's composition

If the pivoting arm is held in the upward position by the doorframe when the door is closed, then the storage position is maintained, but the stopper cannot automatically engage to prevent door closure

Engineering Contradiction:
Improvestorage position stabilityVSAvoidautomatic door closure prevention
Core Design Contradiction:
Stability of the object's compositionVSExtent of automation

Solution Approach 1:

The pivoting arm is designed to be dynamic rather than static, allowing it to automatically transition between storage and operational positions. When the door is opened, the pivoting arm moves from the upward storage position to engage with the doorframe, automatically preventing door closure without requiring operator intervention.

Inventive Principle:
Principle #15Dynamics

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 door stopper automatically activates to prevent door closure, allowing full opening and requiring operator intervention only for storage, thus enhancing safety and reducing caregiver workload while ensuring protection from accidental door closures.

Implementation Method 1

A gravity-biased door stopper with a pivoting arm that automatically moves from a storage position to an operating position when the door is opened

Methodology Applied
Scientific EffectGravity: Gravitation

Data Source

PatentUS8914945B2Door stopper and method of use
Publication Date: 2014.12.23 CALLAHAN PATRICK F
  • US8914945B2 patent drawing
  • US8914945B2 patent drawing
  • US8914945B2 patent drawing

AI summary

One embodiment of the invention may be a door stopper and a method of operating same, the door stopper may comprise a base plate and a pivoting arm, the base plate having at least a first side and a second side, the first side being pivotally connected to a pivoting arm in a manner that allows the pivoting arm to move between an operating position and a storage position; wherein the door stopper attaches by its second side to a side of a door of a doorway proximate to a edge of the door in a manner that allows the pivoting arm to move from a storage position to an operating position automatically, this operating position allows the pivoting arm to prevent the door from fully closing within the doorway.