Exercise treadmill
US6923746B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1999 |
| Grant date | Aug 2, 2005 |
| Priority date | — |
| Expiry date | Dec 6, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2220/53
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
To improve tracking, an exercise treadmill is provided with a frame including molded plastic pulleys, having an integral gear belt sprocket, an endless belt extending around the pulleys and a motor operatively connected to the rear pulley to drive the belt. The pulleys are molded out of plastic and have a diameter of approximately nine inches. A mold and method for producing large diameter treadmill pulleys having an integrally molded sprocket are also disclosed. A deck underneath the running surface of the belt is supported by resilient members. A positive lateral belt tracking mechanism is used to correct the lateral position of the belt. A belt position sensor mechanism is used in combination with a front pulley pivoting mechanism to maintain the belt in the desired lateral position on the pulleys. The exercise treadmill also includes a lift mechanism with an internally threaded sleeve engaged to vertically aligned nonrotating screws. A user display of foot impact force on the belt is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.