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Dumbbell Assembly

a technology for dumbbells and weightheads, applied in the field of dumbbell weighthead assemblies, can solve the problems of users being injured or damaged by nearby objects, the head of the weighthead will get wobbly or loose from the handle afterward, and the potential danger of users being exposed to the head

Active Publication Date: 2010-11-04
CAO GUOFANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention is an improved design and construction of dumbbells with secure and tight weight-heads that are not likely to detach or cause injuries. The invention solves the problems of welding not solidly and the weight-heads getting wobbly or loose after use. The assembly structure of the invention uses reverse threadlines and regular threadlines to attach the flanges to the weight-heads, making the junction portion bigger than the stub portion to receive the weight-heads. The invention also includes a plurality of screws or bolts to tighten the weight-heads to the flanges. The technical effects of the invention are improved safety and secure dumbbells with tight weight-heads."

Problems solved by technology

If the welding is not done solidly, which oftentimes happen as a result of mass-production, the weld junction tend to break and the weight-heads are likely to be detached away from the handle and cause injuries to users or damages to nearby objects.
In the case where the weight-heads are screwed on, usually by a single bolt or screw going into the hole along the axial direction of the handle, oftentimes the weight-heads will get wobbly or loose from the handle after some period of use by users.
Such loose or wobbly weight-heads present potential great danger to users.

Method used

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Examples

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Embodiment Construction

[0013]In FIG. 1, a dumbbell assembly having two weight-heads is shown. Two flanges 1.2 are formed at some offset length from the two ends of the handle 1.1, leaving two stub 1.4 on the two outer-most portion of said handle 1.1.

[0014]A plurality of through holes 1.3 are made to the flanges 1.2; corresponding number of holes 1.6 on 2 weight-heads 1.5 are made to contain regular (clockwise) threadlines, so that screws (or bolts) 2.3 (with matching regular threadlines) can be used to attach and tighten the flanges 1.2 to the weight-heads 1.5, when the stub 1.4 is inserted into the center hole 1.7 of the weight-heads 1.5, as shown in FIG. 2.

[0015]FIG. 3 shows that reverse threadlines 3.3 are machined to the junction to receive flanges 3.2 containing matching threadlines. The stub portion of the handle contains regular threadlines 3.5 to received the center hole of weight-heads containing matching threadlines.

[0016]For this type of reverse threadlines and regular threadlines made on the h...

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PUM

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Abstract

Normal dumbbell assembly tends to have loose of wobbly weight-heads, after repeated use, producing inherent risk of danger for users. Present invention described and claimed a dumbbell assembly that has a structure not likely to have loose or wobbly weight-heads, and thus reducing and avoiding potential harms and dangers to users, due to the tight and secure attachment of weight-heads to the dumbbell handle.

Description

FIELD AND BACKGROUND OF THE INVENTION[0001]The present invention relates generally to an improved design and construction of dumbbell weight-head assembly.[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]Mostly, the attachment of the weight-heads is done by direct welding of the weight-heads to the handle bar. Alternatively, weight-head may be screwed into a hollowed thread hole along and axial direction of the handle.[0004]During normal usage, dumbbells are constantly being dropped, impacted and thrown around, in gyms and private houses. If the welding is not done solidly, which oftentimes happen as a result of mass-production, the weld junction tend to break and the weight-heads are likely to be detached away from the handle and cause injuries to users or damages to nearby objects.[0005]In the case where the weight-hea...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A63B21/072
CPCA63B21/0728A63B21/0726
Inventor CAO, GUOFANG
Owner CAO GUOFANG