Dual weight stack exercising machine with coupling arrangement
US6719672B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 2000 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Jan 10, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B23/0494
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A weight stack adjusting mechanism is provided for an exercise machine having a frame, an operating mechanism movably connected to the frame, a resisting structure on the frame and a connecting device entrained about a first pulley and a second pulley. Both pulleys are mounted on the frame and join the operating mechanism with the resisting structure so as to selectively allow moving the resisting structure between a raised position and a lowered position. The system includes a first guide rod, a second guide rod, a third guide rod, and a fourth guide rod, each being supported by the frame. The resisting structure is formed by a primary weight stack movably mounted on the first and second guide rods, and a supplementary weight stack movably mounted on the third and fourth guide rods. A coupling arrangement is disposed upon a top plate of the primary weight stack and a top plate of the supplementary weight stack and interconnects the primary weight stack and supplementary weight stack together such that a lifting force applied through the connecting device will simultaneously lift the primary weight stack and the supplementary weight stack in a balanced manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.