Rowing machine
US4798378A · kind A · utility
Inventor
Key dates
| Filing date | Jul 28, 1986 |
| Grant date | Jan 17, 1989 |
| Priority date | — |
| Expiry date | Jul 28, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S482/908
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A rowing exercise machine has a horizontal tubular member on which a seat is mounted on rollers for movement along the member. The horizontal member also mounts foot rests which may be removable. A flywheel assembly is mounted either at the front or rear end of the horizontal member. The flywheel assembly includes a flywheel and a one-way clutch connected to the flywheel. The flywheel is rotated by a user pulling on a handle which is connected by cables, chains or toothed belts to sprockets connected to the flywheel through the one-way clutch. The handle, cable or chain is attached to a slide that moves within the horizontal member and a tension cord is also connected to the slide to urge the handle through a retracted position. The clutch is disengaged when the handle retracts. The flywheel has a non-magnetic, conducting rim portion that passes through a magnetic field created by a stationary field piece having one or more field coils. Switches are actuated by the movement of the slide block within the horizontal member to alternately open and close a circuit from a source of current to the field coil at various positions during a rowing stroke.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.