Safety system
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United States of America Patent
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Nov 19, 2013
Grant Date -
Aug 22, 2013
app pub date -
Nov 15, 2012
filing date -
Feb 17, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A safety system comprises an activation mechanism, a safety circuit, and a drive system in communication with each other. In one embodiment, the activation mechanism produces an activation signal in response to an actuation of the activation mechanism. The safety circuit operates in either a locked state or a normal operation state. In this embodiment, the safety circuit is programmed to prevent the activation signal from being communicated to the drive system when the safety circuit is operating in the locked state and to allow the activation signal to be communicated to the drive system when the safety circuit is operating in the normal operation state. The safety circuit is programmed to transition from the locked state to the normal operation state in response to receiving both an unlocking code and a follow-up signal that is received by the safety circuit within a predetermined amount of time. The safety circuit may be further programmed to transition from the normal operation state to the locked state in response to the safety circuit failing to receive an activation signal within a second predetermined amount of time.
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