Adjustable Rack-Out Hooks and Counterweighted Safety Tiers

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Solution Overview

Problem

Existing half-rack and full-rack exercise machines face challenges in easily and quickly adjusting rack out hooks and safety tiers without the risk of accidental dropping, with standard designs being cumbersome and potentially dangerous.

Innovation Solution

The system features adjustable rack out hooks and counterweighted safety tiers that slide along guide rods, allowing easy height adjustments by rotating them 20 degrees and minimizing the risk of dropping, with counterweights reducing the weight lifted during adjustments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If standard heavy safety tiers are used, then strength and sturdiness are improved, but ease of operation deteriorates due to difficulty in adjustment and risk of accidental dropping

Engineering Contradiction:

Improvestrength of safety tierVSAvoidease of adjustment

Core Design Contradiction:

StrengthVSEase of operation

Solution Approach 1:

The patent applies counterweights attached to the safety tiers that offset the weight of the tiers themselves, making them easier to adjust. The counterweights balance the heavy safety tier structure, reducing the effort required by the user to move and reposition the safety tiers during adjustment operations.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

Solution Approach 2:

The patent makes the safety tiers dynamically adjustable by allowing them to be easily moved between different heights and positions. The safety tiers can be quickly repositioned along the guide rods and locked into place, transforming from static heavy structures to dynamic, easily adjustable components.

Inventive Principle:

Principle #15Dynamics

2Strength

If standard heavy safety tiers are used, then strength and sturdiness are improved, but reliability deteriorates due to risk of accidental dropping during adjustment

Engineering Contradiction:

Improvestrength of safety tierVSAvoidsafety against accidental dropping

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The counterweights attached to the safety tiers compensate for the heavy weight that causes accidental dropping. By balancing the weight distribution, the counterweights make the safety tiers more stable during adjustment and reduce the likelihood of them being accidentally dropped, thereby improving reliability without sacrificing strength.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

Solution Approach 2:

The safety tiers are pre-designed with counterweights and locking mechanisms that prevent accidental dropping before it can occur. The counterweights are attached in advance to balance the safety tier, and the locking mechanisms are positioned to secure the tiers in place during adjustment operations.

Inventive Principle:

Principle #10Preliminary action

3Ease of operation

If rack out hooks are made easily adjustable, then ease of operation is improved, but reliability deteriorates due to potential for dropping during adjustment

Engineering Contradiction:

Improveease of adjustmentVSAvoidsafety against dropping

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The rack out hooks are designed with dynamic adjustability, allowing them to be easily moved along the guide rods and locked into place at different heights. The hooks can be quickly repositioned and secured, providing ease of operation while maintaining reliability through proper locking mechanisms.

Inventive Principle:

Principle #15Dynamics

4Ease of operation

If safety tiers are designed to be easily adjustable, then ease of operation is improved, but weight increases due to counterweights

Engineering Contradiction:

Improveease of adjustmentVSAvoidweight of safety tier

Core Design Contradiction:

Ease of operationVSWeight of moving object

Solution Approach 1:

The counterweights attached to the safety tiers actually reduce the net weight that the user must handle during adjustment. By balancing the safety tier structure, the counterweights offset the heavy weight, making the safety tiers easier to move and adjust despite their overall mass.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

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

Enables quick and safe height adjustments of rack out hooks and safety tiers, reducing the likelihood of accidental drops and user effort, enhancing user safety and convenience.

Implementation Method 1

a counterweight connected to each safety tier

Methodology Applied

Scientific EffectCounterweight: Balance

Data Source

PatentUS12458836B2Exercise machine with adjustable rack out hooks and adjustable counterweighted safety tiers

Publication Date: 2025.11.04 HOIST FITNESS SYSTEMS INC

AI summary

An exercise machine with an adjustable safety tier and rack out hook system, having: (a) a safety tier attached to and moveable along each of a pair of upwardly-extending guide rods, wherein the safety tier can be rotated to a locked position such that the safety tier latches onto the upwardly-extending support member or rotated to an unlocked position; (b) a counterweight connected to each safety tier; and (c) a rack out hook attached to and moveable along each of the upwardly-extending guide rods, wherein the rack out hook can be rotated to a locked position such that the rack out hook latches onto the upwardly-extending support member or rotated to an unlocked position.