Electrical interlock safety control to prevent operation of mower during reverse travel
US3999643A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 22, 1975 |
| Grant date | Dec 28, 1976 |
| Priority date | — |
| Expiry date | Dec 22, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2500/70418
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A transmission lever operated switch is incorporated in the electric control circuit for an electric clutch employed in the drive of a tractor mounted mower whereby the electric circuit is deenergized whenever the transmission control lever is placed in its reverse position. The control circuit for the electric clutch includes a seat operated switch whereby the electric circuit will be deenergized whenever the seat is unoccupied. The electric circuit further includes an on-off switch which is interconnected with an ignition circuit switch for an internal combustion engine whereby when the ignition switch is closed, the on-off switch for the electric clutch circuit will be open. Thus, during starting of the engine, the mower blade drive will be inoperative due to the deenergization of the electric clutch control circuit. The electrical interlock control prevents operation of the mower blade during starting of the engine, when the operator's seat is unoccupied and/or when the transmission control is in reverse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.