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US 6,208,536 B1Granted
Safety device for a drive mechanism
AssigneeRobert Bosch GmbH
InventorsGuenther Boesche, Rupert Weber, Olaf Kunz
Life of this patent
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Abstract
A safety device for a drive is includes a monitoring system which evaluates a value describing the operating state of the drive in order to ascertain whether an emergency operation should be started for the protection of the drive instead of normal operation. The monitoring system generates at least one first output signal for an actuating element that influences the power supply to the drive. In normal operation an a.c. signal is used as the output signal and in emergency operation a d.c. signal is used.
Claims5
A safety device for a drive comprising:
- a monitoring system evaluating at least one value describing an operating state of the drive in order to ascertain whether an emergency operation, instead of a normal operation, is to be started for a protection of the drive, the monitoring system generating at least one output signal, an a.c. signal being used in the normal operation and a d.c. signal being used in the emergency operation as the output signal;
- and
- at least one actuating element receiving the output signal and influencing a power supply to the drive as a function of the output signal.
Dependencies are inferred from the claim text.