Gryoscope controlled walk behind trowel
US6846127B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 2003 |
| Grant date | Jan 25, 2005 |
| Priority date | — |
| Expiry date | Nov 7, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04F21/248
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A control module for a walk behind trowel configured to detect and to prevent an uncontrolled or undesirable motion of the trowel. The trowel includes an engine configured to drive rotation of a rotor. The control module includes a gyroscope and a controller. The gyroscope is configured to provide an electrical signal representative of an angular rate of motion of a reference structure on the walk behind trowel. The controller is configured to receive the electrical signal from the gyroscope and to determine when a change in the angular rate of motion of the trowel exceeds a threshold value, and in response, to prevent the engine from driving the rotor to rotate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.