Safety system for lawn mowers or other vehicles
US3942604A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 13, 1974 |
| Grant date | Mar 9, 1976 |
| Priority date | — |
| Expiry date | Aug 13, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K28/04
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The disclosed safety system is particularly applicable to walk-behind lawn mowers of the type having a drive including a control, movable between drive and neutral positions. The safety system includes a drive switch, movable between drive and neutral positions. The safety system also includes a deadman control, biased toward an off position and manually movable to an on position. The deadman control operates a deadman switch between off and on positions. The lawn mower includes a drive motor having a safety circuit for disabling the motor. The drive switch and the deadman switch are connected into the safety circuit and are provided with contacts for disabling the motor when the drive switch is in its drive position and the deadman switch is in its off position. Such contacts are also operative to disable the motor when the drive switch is in its neutral position and the deadman switch is in its on position. In a modified construction, the safety system also includes a starting interlock switch operable by the starting device for the motor. The starting interlock switch is operable to a first position when the starting device is not in use and a second position when the starting d…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.