Open Trap-Camber Bar With Removable Handles for Easier Plate Loading

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Solution Overview

Problem

Straight barbells can cause knee or shin interference for inexperienced lifters or those with mobility limitations, and are difficult to load when placed high on squat racks, limiting their usability and comfort during exercises.

Innovation Solution

A U-shaped bar with removable handles and plate-support posts that allow for easier loading and unloading of weight plates, providing a stable and versatile exercise device that can be used as both an open trap bar and a camber bar, accommodating various exercises and user sizes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a straight barbell is used, then versatility for various exercises is achieved, but knee or shin interference occurs for inexperienced lifters or those with mobility limitations

Engineering Contradiction:
Improveexercise versatilityVSAvoidknee interference
Core Design Contradiction:
Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The barbell is designed with a curved camber configuration instead of a straight design. The camber bar features a gentle arch that positions the bar higher relative to the user's knees, eliminating interference with the shins and knees during exercises like deadlifts and squats, while maintaining the ability to perform various exercises

Inventive Principle:
Principle #14Spheroidality (Curvature)

2Area of stationary object

If a straight barbell is placed high on squat rack supports, then space utilization is improved, but loading and unloading weight plates becomes difficult

Engineering Contradiction:
Improverack space utilizationVSAvoidplate loading ease
Core Design Contradiction:
Area of stationary objectVSEase of operation

Solution Approach 1:

The barbell incorporates removable handle units that can be detached from the camber bar. This dynamic configuration allows the handles to be removed when loading plates on high rack supports, enabling easier access to the bar and plates without the handles obstructing the loading process. The handles can be reattached when needed for exercises requiring hand grip

Inventive Principle:
Principle #15Dynamics

3Ease of operation

If removable handles are added to the camber bar, then ease of loading is improved, but device complexity increases

Engineering Contradiction:
Improveloading easeVSAvoidstructure complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The barbell is divided into distinct modular components: the camber bar shaft, removable handle units, and weight plates. The handle units are designed as separate assemblies that can be independently attached or detached from the bar using simple fastening mechanisms, reducing overall structural complexity while enabling easy loading operations

Inventive Principle:
Principle #1Segmentation

Data Source

PatentUS12564753B2Open trap-camber bar with self-bracing removable handles
Publication Date: 2026.03.03 REP FITNESS LLC
  • US12564753B2 patent drawing
  • US12564753B2 patent drawing
  • US12564753B2 patent drawing

AI summary

An exercise device includes a substantially U-shaped bar having an interface at each end. A leg secured to each interface includes a pair of tapered projections extending from the interface. The leg defines a leg opening. A plate-support post secured to each interface includes a first, plate-receiving end extending away from the interface and second end disposed within the interface and defining a threaded bore. A handle unit is removably secured proximate each interface and includes a handle base at least partially defining a handle opening and a pair of receivers. A screw removably secures each handle unit to the leg proximate each interface and extends into the handle and leg openings and is threadably received in the threaded bore. When the screw is received in the threaded bore, each of the pair of receivers receives one of the pair of tapered projections.