Motor vehicles – Including one or more ski-like or runner members – With at least one surface-engaging propulsion element
Patent
1974-08-13
1976-03-09
Wood, Jr., M. H.
Motor vehicles
Including one or more ski-like or runner members
With at least one surface-engaging propulsion element
56 108, 180 82A, 200157, B60K 2600
Patent
active
039426041
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 device is in use. The starting interlock switch is connected into the safety circuit and is provided with contacts for disabling the motor when the drive switch is in its drive position and the starting interlock switch is in its second position, regardless of the position of the deadman switch.
REFERENCES:
patent: 3141944 (1964-07-01), De Voe
patent: 3228177 (1966-01-01), Coates
patent: 3229452 (1966-01-01), Hasenbank
patent: 3608285 (1971-09-01), Berk
patent: 3626676 (1971-12-01), Miley
patent: 3783216 (1974-01-01), Plamper
patent: 3800616 (1974-04-01), Hoffmeyer
patent: 3849620 (1974-11-01), Melisz
Indak Manufacturing Corporation
Siemens Terrance L.
Wood, Jr. M. H.
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