Dumbbell system for muscles work

• US 7,963,892 B2
• Filed: 04/23/2009
• Issued: 06/21/2011
• Est. Priority Date: 04/23/2009
• Status: Expired due to Fees

• Current Assignee: Universidad Tecnológica Metropolitana
• Original Assignee: Universidad Tecnológica Metropolitana
• Inventors: Dinali Alvarado, Antonella Stefania, Poblete Castro, Jose Luis
• Primary Examiner(s): Mathew; Fenn C
• Application Number:
  US12/428,904
• Publication Number:
  US 20100273613A1
• Time in Patent Office: 789 Days
• Field of Search: 482106-109, 482 44- 49, D21680-684
• US Class Current: 482/108
• CPC Class Codes: A63B 21/072 Dumb-bells, bar-bells or the like , e.g. weight discs having an integral peripheral handle
• CPC Class Codes: A63B 21/0722 transformable, e.g. from dumb-bell to bar-bell

Abstract

A dumbbell system that allows a single arm working and alternatively a simultaneous and symmetrical working of both arms to fortify specific muscles, including biceps, triceps and back muscles. The dumbbell system includes a dumbbell unit and either a single weight plate attachment means, or a double weight plate attachment means to connecting two dumbbell units to each other.

Claims

1. A dumbbell system comprising:

two disc-shaped bodies with hand retainer means, each disc-shaped body comprises a first face and a second opposed face, a central projection protruding from the first face, and a hand adapting means including a pillow disposed in the opposite second face, wherein the hand retainer means including an arc-shaped piece disposed over the pillow;

at least a single weight plate attachment means, comprising a solid disc-shaped piece, having two opposite circular faces and a vertical contouring wall, wherein the contouring wall has a plurality of depressions, and further comprises a central annular projection having a threaded interior surface that projects from at least one of the circular faces; and

a double weight plate attachment means, including a solid disc-shaped piece having two opposite circular faces and a vertical contouring wall, the contouring wall having a plurality of depressions, wherein a central annular projection having a threaded interior surface projects from both circular faces;

wherein the dumbbell system allows a single arm working and alternatively a simultaneous and symmetrical working of both arms to fortify specific muscles, including biceps, triceps and back muscles;

wherein

each disc-shaped body may be attached to a single weight plate attachment means in order to be individually used;

or

both disc-shaped bodies may be attached to a double weight plate attachment means keeping said double weight plate attachment means between the disc-shaped bodies so this double attachment means allows fixing two dumbbell units by their body faces, so as to be used in a simultaneous and joint manner.

2. The dumbbell system according to claim 1 wherein the pillow has a semi spherical shape.

3. The dumbbell system according to claim 2 wherein the pillow is fabricated of polyurethane.

4. The dumbbell system according to claim 1 wherein the hand retainer means includes an arc-shaped piece having an interior surface and an exterior surface, and a constant cross sectional thickness, and wherein the width of the arc-shaped piece is increased at the top and at the bottom portions of the arc-shaped piece is attached to the second body face, thereby providing a concave notch proximate at least one of the bottom portions.

5. The dumbbell system according to claim 4 wherein the interior surface comprises a foam material and extends to cover the concave notch.

6. The dumbbell system according to claim 5 wherein the foam material is polyurethane.

7. The dumbbell system according to claim 1 wherein the disc-shaped body and the arc-shaped piece of each disc-shaped body with hand retainer means are constructed as a unitary polymeric part.

8. The dumbbell system according to claim 7 wherein the unitary polymeric part is ABS.

9. The dumbbell system according to claim 1 wherein the central projection disposed on the first face of the disc-shaped body comprises a threaded stem.

10. The dumbbell system according to claim 9 wherein said threaded stem is fabricated in steel.

11. The dumbbell system according to claim 1 wherein the depressions have an elliptical shape, and the disc-shaped piece is fabricated from acrylonitrile butadiene styrene (ABS) plastic.

12. The dumbbell system according to claim 1 wherein the annular projection is fabricated from steel.

13. The dumbbell system according to claim 1 wherein the annular projection having the threaded interior surface threads with the threaded stem of the dumbbell unit.