Variable speed drive system
US5377774A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 4, 1993 |
| Grant date | Jan 3, 1995 |
| Priority date | — |
| Expiry date | Feb 4, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D51/004
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A variable speed drive system for use with a self-propelled device is coupled by a belt to an engine which is mounted to the device. The variable speed drive system includes a variable pitch pulley held in spaced-apart relation to the drive shaft by a fixture and rotates about the drive shaft between a first position proximal to the engine and a second position distal to the engine. In the first position, the drive system is disengaged from the engine and the speed of the self-propelled device is zero, the belt being slack and providing no drive force to the drive system. In the second position, the drive system is moved a maximum amount about the drive shaft and is positioned to achieve a maximum speed. The drive system can also assume any intermediate position between the first and second positions, with the speed of the self-propelled device being determined by the amount of movement about the drive shaft toward the second position. A speed control lever and a control cable assembly are included for limiting the amount of movement of the drive system about the drive shaft to control the speed of the self-propelled device
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.