Adjustable dumbbell system
US7452312B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Sep 13, 2007 |
| Grant date | Nov 18, 2008 |
| Priority date | — |
| Expiry date | Sep 13, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B21/00065
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A plurality of weights is provided. Each weight has a central primary aperture and primary slot. Each weight has a major section and an axially offset secondary minor section. The minor section is formed with a secondary aperture and a secondary slot. A weight-lifting shaft has a plurality of cam plates. An adjustment knob is provided at each end of the shaft. Each cam plate is an irregularly shaped polygon with radially enlarged sections. In this manner cam surfaces are provided at maximum radii greater than the radii of the remainder of the cam plate. The radially enlarged sections are adapted to releasably couple selectively with the secondary aperture of the weights.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.