Fixed Weight Dumbbell Assembly

Abstract

An easy dumbbell assembly is presented herein, so that the weight heads are attached to handle bar in a very secured manner, without the process of welding, or the concern of cold weld. After a lock nut to tighten the assembly and eliminate the spin / rotate of the handle bar, a cap piece is pressed into the specially designed grooves on the weight heads, further securing the lock nut in place, for long period of extended use, reducing safety concern as a result of loose connection between weight heads and handle bar.

Description

FIELD AND BACKGROUND OF THE INVENTION [0001] The present invention relates generally to an improved design and construction of fixed weight dumbbell assembly for use in fitness training wherein the assembly process is made simple and conducive to user safety. [0002] Dumbbells are commonly found in fitness centers and gyms, as well as for sale to private users. Typically, two weight-heads are attached to the two ends of a handle bar, forming a fixed weight dumbbell. [0003] Oftentimes, the mechanism for attaching the two weight-heads to the handle bar is by welding, since most handle bar and weight head materials are made of iron. The problem with welding is that because metals absorb heat, by its nature, points of “cold weld” often form on the junction and is a part of latent defect that may cause breakage during later usage. This type of inherent weakness due to the “cold weld” is hard to detect at a reasonable cost. [0004] Another commonly used attaching means is by using lock nuts...

AI Technical Summary

Benefits of technology

[0006] Present invention essentially employs two locking pins to guide and secure the assembly of weight heads to a handle bar, enabling easy and secured assembly, while reducing the possibility that the weight heads might become loose even after repeated use of knocking around in a less-than-tended-to settings such as fitness centers or gyms.

Problems solved by technology

The problem with welding is that because metals absorb heat, by its nature, points of “cold weld” often form on the junction and is a part of latent defect that may cause breakage during later usage.

This type of inherent weakness due to the “cold weld” is hard to detect at a reasonable cost.

Although there is no inherent weakness, the nuts or screws inevitably become loose, during the useful lifetime of the dumbbell and needs constant checkup to make sure the weigh heads are not loose, posing dangers to unwitting users.

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