Motion translation arrangement for limiting the rate of lever arm convergence in an exercise machine
US6682466B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 10, 2002 |
| Grant date | Jan 27, 2004 |
| Priority date | — |
| Expiry date | Dec 10, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S482/908
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A shoulder press machine is provided having a seat, a backrest and a fixed framework at the top of which a carriage is mounted. The carriage has a pair of downwardly and forwardly extending, diverging lever arms which are tied together and moved upwardly and downwardly along a horizontal pivot axis mounted to the framework behind the backrest. As the lever arms are moved together upwardly, they are simultaneously swung inwardly about a first pair of parallel, pivot axes, the swinging motion being transferred via a pair of connector linkages to pivot the lever arms about a second pair of pivot axes defined by a pair of frame knuckles at the back end of the frame. As a result of these linkages, a shoulder press machine is provided in which the lever arms are moved in inwardly curved, converging planes from a lowermost location to an uppermost location in such a way that the rate of convergence decreases as the lever arms are raised to a point of substantially no convergence. The inventive machine thus provides for an optimal range of motion for exercisers regardless of the exerciser's arm length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.