Conveyor brake control
US4664247A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1984 |
| Grant date | May 12, 1987 |
| Priority date | — |
| Expiry date | Apr 30, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B25/00
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A transportation apparatus having improved brake control. The actual speed of the transportation apparatus is compared with a reference speed signal, and when the actual speed exceeds the reference speed a brake is applied to slow the transportation apparatus. Rather than simply applying the full torque of the brake abruptly, the present invention discloses an apparatus for pulse duration modulating the control signal for controlling the brake. The brake responds to the average of the pulse duration modulated control signal such that braking torque is applied gradually and essentially linearly. The device can also be used in an acceleration situation to provide gradual acceleration of the transportation apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.