Electricity: motive power systems – Braking – Dynamic braking
Patent
1996-06-19
1997-12-30
Ro, Bentsu
Electricity: motive power systems
Braking
Dynamic braking
318139, 388903, 180271, 180279, A01D 7520
Patent
active
057034508
ABSTRACT:
A safety guard for a pedestrian-operated or riding machine having rotatable blades and incorporating a strip switch for disabling the motor of the machine upon sensing the presence of an operator's body part or other foreign object in contact with a side of the housing or between the housing of the machine and the ground. The strip switch is secured to the housing and is oriented to be actuated when the machine overruns or contacts a foreign object. Upon actuation, the strip switch disables operation of the motor to prevent the machine's rotating blades or other moving parts below the housing of the machine from striking the foreign object. Another approach to minimizing injury from machinery having rotatable blades is to provide a semi-rigid guard which is attached to the machine body and movable in a forward movement and away from the ground while preventing lateral movement of objects under the machine. The moveable guard will bump into an operator's foot or leg and reduce the possibility of the machine overrunning the operator's foot or leg.
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