Pivotal Unit For Barbell

Inactive Publication Date: 2014-06-12
CHEN JIH MING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]The number of the parts of the pivotal unit of the present

Problems solved by technology

There is not proper positioning design to position the two position

Method used

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  • Pivotal Unit For Barbell
  • Pivotal Unit For Barbell
  • Pivotal Unit For Barbell

Examples

Experimental program
Comparison scheme
Effect test

Example

[0026]FIG. 6 shows the second embodiment of the pivotal unit 300 which comprises a self-lubricating sleeve 330 and a positioning member 34 only. The self-lubricating sleeve 330 is mounted to the rod 10 and the positioning member 34 contacts the self-lubricating sleeve 330. The end piece 35 is connected to the open end 21 of the tubular member 20 and contacts the positioning member 34 so that the pivotal unit 30 is well positioned. The self-lubricating sleeve 330 and the tubular member 30 are rotatable relative to the rod 10 without the need of the sleeve as mentioned in the previous embodiment.

[0027]While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.

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PUM

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Abstract

A barbell includes a rod and two tubular members are respectively mounted to the two ends of the rod. Two pivotal units are respectively located in the two tubular members and mounted to the two ends of the rod. Each pivotal unit has a washer, a bearing, a sleeve and a positioning member. The washer has a recess defined in one side thereof. The bearing is securely connected to the inside of the tubular member and a first end of the bearing contacts the washer. The sleeve is located in the bearing and securely mounted to the rod, a first end of the sleeve is movably engaged with the recess of the washer. The positioning member is a U-shaped manner and engaged with a groove defined in the rod. The positioning member contacts two respective seconds of the sleeve and the bearing.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a barbell, and more particularly, to a pivotal unit for a barbell.BACKGROUND[0002]The conventional barbell is used for weight training and generally comprises a rod with two pivotal units mounted to two ends of the rod. Multiple weights are removably connected to the two pivotal units. The user grabs the center of the rod and lifts the barbell to train the muscles. The pivotal units ensure that the weights are automatically adjusted to a balance status relative to the rod so that the user does not need to rotate the rod by his / her wrists and this action can easily injure the wrists.[0003]FIGS. 7 and 8 disclose the conventional barbell and the rod 70 with proper flexibility and two pivotal units 80 are mounted to two ends of the rod 70. Each of the two ends of the rod 70 has a groove 71. A needle roller bearing 72, a first ring 73, two positioning members 74, a second ring 75, two clips 76 and an end piece 77 are mounted to...

Claims

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Application Information

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IPC IPC(8): A63B21/072
CPCA63B21/0728A63B21/0724
Inventor CHEN, JIH MING
Owner CHEN JIH MING
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