Telescopic Suspension Strut Spring Compressor with Variable Slot Geometry

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Solution Overview

Problem

Existing devices for removing and replacing motor vehicle suspension struts are often clumsy, inefficient, and unsafe, and lack the ability to accommodate suspension struts with coils of different diameters, failing to provide a portable and easy-to-use solution for safely compressing and releasing tension in coiled springs.

Innovation Solution

A device comprising a first hollow tube with a second smaller tube that fits slidably inside, featuring rotatable threaded drive shafts and compressor plates with slotted sections to accommodate coils of varying diameters, allowing for safe and easy removal and replacement of suspension struts by compressing the coiled spring.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If existing devices are used to remove and replace suspension struts, then the task can be completed, but the devices are clumsy, inefficient, and unsafe

Engineering Contradiction:
Improveease of useVSAvoiddevice complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The device is divided into two telescopic tubes (first hollow tube and second tube) that can slide relative to each other, allowing the compressor plates to be positioned independently to accommodate different spring diameters while maintaining a compact overall structure when not in use

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The compressor plates are designed with slotted sections that can accommodate coils of varying diameters, making the single device universally applicable to different suspension strut types and sizes, eliminating the need for multiple specialized tools

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If existing devices are used to remove and replace suspension struts, then the task can be completed, but they fail to accommodate suspension struts with coils of different diameters

Engineering Contradiction:
Improveaccommodation of different coil diametersVSAvoidsafety
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The compressor plates feature slotted sections with varying widths at different locations, allowing each plate to engage with coils of specific diameter ranges. This local variation in geometry enables the device to adapt to different spring sizes while maintaining secure engagement and safe operation

Inventive Principle:
Principle #3Local quality

3Ease of operation

If existing devices are used to remove and replace suspension struts, then the task can be completed, but they lack portability

Engineering Contradiction:
ImproveportabilityVSAvoidefficiency
Core Design Contradiction:
Ease of operationVSProductivity

Solution Approach 1:

The second tube is designed to fit slidably inside the first hollow tube, creating a telescopic structure that reduces the overall size and weight of the device when not in use, improving portability while maintaining the functionality to accommodate different spring sizes when deployed

Inventive Principle:
Principle #7Nested doll (Nesting)

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 enables safe, quick, and easy removal and replacement of suspension struts while accommodating coils of different diameters, ensuring portability, effectiveness, and safety, while preventing personal injury and property damage.

Implementation Method 1

a threaded section formed at or along the interior side walls of the first end. Also provided is a rotatable threaded drive shaft, which is coaxially mounted within the first hollow tube at one end of the tube, for engaging the threaded section

Methodology Applied
Scientific EffectThreading: Screw

Data Source

PatentUS7909305B2Suspension strut removal device
Publication Date: 2011.03.22 ULTIMATE TOOL LLC THE
  • US7909305B2 patent drawing
  • US7909305B2 patent drawing
  • US7909305B2 patent drawing

AI summary

A device for compressing a coiled spring comprised of multiple coils used in combination with a motor vehicle suspension strut under tension including a first hollow tube and a second smaller tube adapted to fit slidably into the first hollow tube. First and second compressor plates are provided to engage spaced coils. A rotatable drive shaft compresses the coiled spring to reduce tension against the strut's retention end plates to enable the safe, quick and easy removal and replacement of the strut. Each compressor plate consists of an open ended slotted central portion and two side sections defining an upper slotted section and a narrower bottom slotted section with an annular interior edge. The upper slotted section is provided to seat coils with a large diameter. The bottom slotted section is provided to seat coils with a small diameter.Openings are formed within the plates' side sections to receive elongated rods for preventing the tensioned coiled spring from slipping from its placement while awaiting the installation of a new strut.