Patent ID: 11891281
Assignee: MANITOWOC CRANE GROUP FRANCE
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 18:
19. A lifting or transport apparatus comprising a lifting winch integrating a drum on which is wound a lifting rope coupled to a hanging load for lifting of the hanging load, the lifting or transport apparatus comprising:
a first measuring system for measuring a mass parameter representative of a mass of the hanging load;
a second measuring system for measuring a lifting speed representative of a displacement speed of the hanging load, when ascending or descending, and comprised within a speed range bound by a maximum speed;
an emergency stop which, once activated shuts off at least the lifting winch and stops lifting of the hanging load and which, once deactivated, authorizes a reactivation of the lifting winch;
an alarm system configured to emit an alarm when activated;
a monitoring/control system connected to the first measuring system, to the second measuring system, to the lifting winch, to the alarm system and to the emergency stop, the monitoring/control system being configured to perform, during an ascending of the hanging load, a comparison of the lifting speed when ascending with a low threshold which varies according to the mass parameter, and with a high threshold which also varies according to the mass parameter, the high threshold being higher than or equal to the low threshold and lower than or equal to the maximum speed; and
wherein the monitoring/control system is configured, in an optimized mode, to control the lifting winch so that the lifting speed when ascending is authorized only below the high threshold and is forbidden above the high threshold, and to activate the alarm system if the emergency stop is activated during an ascending of the hanging load and while the lifting speed when ascending is higher than the low threshold.