Variable tension pulley system
US5938551A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 1997 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Mar 28, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2007/0874
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
The variable tension pulley system including a drive pulley, a slave pulley, a belt interconnecting the drive pulley and slave, a tensioner assembly positioned between the drive pulley and the slave pulley and in engagement with the belt. The tensioner assembly includes an elongated rack, a drive rod rotatably positioned on the rack, the drive rod having opposing ends and being selectively rotatable in a positive rotation or a negative rotation. The tensioner assembly also includes a drive block positioned on each end of the rod and in moveable engagement with the rack, each of the drive blocks being moveable along the length of the rod upon rotation of the rod, the drive blocks moving toward each other when the rod is rotated in the positive direction, and the drive blocks moving away from each other when the rod is rotated in the negative direction, a slide block slidably positioned on the rod adjacent to, inside of and in selective engagement with each drive block, and in slidable engagement with the rack, each slide block being moved toward the other slide block by the associated drive block when the drive blocks are moved toward each other, and a tensioner pulley attached to e…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.