Center-Mass Weight Structure With Internal Incremental Loading

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Solution Overview

Problem

Conventional dumbbells and kettlebells pose safety risks due to loose weights, space inefficiency, and high costs, limiting their use in strength training facilities and home gyms.

Innovation Solution

An adjustable center mass weight apparatus with a hollow core member and incremental weight members that can be added to the top and bottom ends, maintaining even weight distribution and allowing conversion into different weight apparatuses for varied exercises.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional dumbbells with threaded bolts are used to attach weights, then weights can be securely attached to handles, but the risk of injury increases significantly if bolts become loose and weights move or fall off

Engineering Contradiction:
Improveweight attachment securityVSAvoidinjury risk from loose weights
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent removes the threaded bolts and external weight plates from the system, extracting the harmful elements that can become loose. Instead, weights are integrated into the handle structure itself through a hollow core design where incremental weight members are inserted internally, eliminating the attachment mechanism that causes safety issues.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent implements nesting by placing incremental weight members inside the hollow core of the handle. The weight members are nested within the handle structure rather than being externally attached, creating a unified integrated design where weights cannot become loose or detach during use.

Inventive Principle:
Principle #7Nested doll (Nesting)

2Adaptability or versatility

If multiple sets of conventional weights are purchased to provide weight variety, then exercise versatility is improved, but space requirements and equipment costs increase substantially

Engineering Contradiction:
Improveexercise varietyVSAvoidstorage space
Core Design Contradiction:
Adaptability or versatilityVSArea of stationary object

Solution Approach 1:

The patent creates a universal handle that can perform multiple functions by accepting different incremental weight members. A single handle design works with various weight configurations (5lb, 10lb, 15lb increments) and can be used for different exercises, replacing the need for multiple specialized weight sets.

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

Solution Approach 2:

The patent implements dynamics by making the weight configuration adjustable and changeable. Users can dynamically modify the weight by adding or removing incremental weight members from the hollow core, allowing the same handle to adapt to different training needs and exercise requirements.

Inventive Principle:
Principle #15Dynamics

3Ease of operation

If conventional dumbbells with circular weights are used, then weights can be attached to handles, but the circular weights create challenges of rolling off the handle during exercise

Engineering Contradiction:
Improveweight handlingVSAvoidweight rolling off handle
Core Design Contradiction:
Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent uses spheroidality by incorporating a ball at the end of the handle that acts as a physical stop. This spherical element prevents linear weights from rolling off the handle during exercise, providing a curved barrier that contains the weights within the safe operational area.

Inventive Principle:
Principle #14Spheroidality (Curvature)

4Reliability

If center mass bells with handles inside the main body are used, then weight distribution is even and safety is improved, but the apparatus takes up substantial space and costs substantial money

Engineering Contradiction:
Improvesafety from pinched fingersVSAvoidstorage space
Core Design Contradiction:
ReliabilityVSArea of stationary object

Solution Approach 1:

The patent applies segmentation by dividing the center mass bell into modular components: a handle section and incremental weight members that can be separately stored. The hollow core design allows the weight to be segmented into detachable units, enabling compact storage when not in use while maintaining the safe center-mass design during exercise.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentUS20260061247A1Adjustable center mass weight apparatus
Publication Date: 2026.03.05 GRAY PERFORMANCE ENTERPRISES LLC
  • US20260061247A1 patent drawing
  • US20260061247A1 patent drawing
  • US20260061247A1 patent drawing

AI summary

An adjustable center mass weight apparatus includes a generally spherical, hollow core member, a grip handle, grooves, and incremental weight members, that saves space, equipment, and costs and facilitates safe usage thereof and additional strength training exercises. The core member is free of top and bottom spherical caps and defines a cavity therewithin, between top and bottom ends of the core member, for accommodating a user's hand and movements therewithin. The grip handle is disposed centrally inside the cavity along a horizontal axis transverse to a central axis of the core member. The grip handle distributes weight of the apparatus evenly around the hand gripping the grip handle. The core grooves are disposed at the top and bottom ends of the core member. The weight members are engaged with the core grooves at the top and bottom ends of the core member, without disrupting weight distribution of the grip handle.