Leg press and abdominal crunch exercise machine
US7070545B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 2002 |
| Grant date | Jul 4, 2006 |
| Priority date | — |
| Expiry date | Jul 14, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B23/0211
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
An exercise machine composed of a frame, a first four bar linkage system, a second four bar linkage system, and a means for transferring an incident force from the legs of a user is disclosed. The first four bar linkage system is operably mounted on the frame and operably connects the transferring means to the frame to allow for back and forth movement of the transferring means along a path of travel about an instantaneously changing axis of rotation. The second four bar linkage system operably engages the first four bar linkage system. Either or both of the first four bar linkage system and the second four bar linkage system are operably connected to a resistance means, whereby the second four bar linkage system operates in conjunction with the first four bar linkage system and the resistance means to create a mechanical disadvantage to the user.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.