Vehicle Door Alignment Pin Bolt for Fast Scratch-Free Reattachment

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Solution Overview

Problem

Aligning and securing removable vehicle doors without damaging the paint or frame is challenging due to the difficulty in aligning bolts through vehicle hinges, which is time-consuming and prone to causing scratches.

Innovation Solution

A vehicle door alignment pin bolt with a threaded top and angled bolt cap, combined with a bolt nut featuring a recessed area to fit over the angled bolt cap, facilitates easy alignment and secure attachment of removable doors to the vehicle frame.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a bolt is used to secure the removable door through the hinge, then the door can be attached to the vehicle frame, but the alignment process is time-consuming and may damage the paint or frame

Engineering Contradiction:
Improvedoor attachment securityVSAvoidalignment time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The bolt is pre-threaded into the hinge assembly before the door is attached to the vehicle frame. This preliminary action allows the bolt to be positioned and ready for insertion without requiring time-consuming alignment during the door attachment process, directly resolving the time loss issue while maintaining secure attachment.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent introduces an intermediary alignment mechanism (such as alignment pins or guide features) that facilitates the insertion of the pre-threaded bolt through the hinge. This intermediary element ensures proper alignment without requiring manual adjustment, preventing paint damage while maintaining attachment security.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If a bolt is used to secure the removable door through the hinge, then the door can be attached to the vehicle frame, but the alignment process may scratch the paint or damage the frame

Engineering Contradiction:
Improvedoor attachment securityVSAvoidpaint damage
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces an intermediary alignment mechanism (such as alignment pins or guide features) that facilitates the insertion of the pre-threaded bolt through the hinge. This intermediary element ensures proper alignment without requiring manual adjustment, preventing paint damage while maintaining attachment security.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The bolt is pre-threaded into the hinge assembly before the door is attached to the vehicle frame. This preliminary action allows the bolt to be positioned and ready for insertion without requiring time-consuming alignment, directly resolving the time loss issue while maintaining secure attachment.

Inventive Principle:
Principle #10Preliminary action

3Reliability

If a traditional bolt and nut assembly is used, then the door can be secured, but the process requires multiple components and complex assembly steps

Engineering Contradiction:
Improvedoor attachment securityVSAvoidnumber of components
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines the bolt and nut functions into a single integrated fastening component. The pre-threaded bolt incorporates the fastening mechanism directly, eliminating the need for a separate nut and simplifying the assembly process while maintaining secure attachment of the door to the vehicle frame.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The patent divides the door attachment system into distinct functional modules: the pre-threaded bolt integrated into the hinge assembly, and a separate simplified fastening element. This segmentation allows for easier assembly and maintenance while reducing the overall complexity of the fastening system.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentUS12540498B2Door alignment pin bolt with the thread on the top
Publication Date: 2026.02.03 GOLDWITZ BRIAN
  • US12540498B2 patent drawing
  • US12540498B2 patent drawing
  • US12540498B2 patent drawing

AI summary

The current invention is vehicle door alignment pin bolts with a bolt thread on the top. The current invention will have two components, a door bolt with a thread on the top with an angled bolt cap in the middle and a bolt nut with an opening on the bottom that fits over the angled bolt cap. The allows for the reconnecting the door to the frame of the vehicle in a quicker and more efficient manner.