Patent ID: 11965317
Assignee: MARATHON PETROLEUM COMPANY LP
Field: Civil engineering (Other fields)
Classification: CPC E  B | IPC B  E

Claim 20:
21. A system to change an operational state of one or more indicators positioned on hydraulic equipment, the system comprising:
a hydraulic initiation lever positioned proximate an operator's seat of the equipment and actuatable to an active position and an inactive position, so that actuation of the hydraulic initiation lever when in the active position causes generation of an unlock signal, thereby to enable hydraulic operation of the hydraulic equipment and so that actuation of the hydraulic initiation lever to the inactive position causes the generation of the unlock signal to cease; and
one or more indicators, including one or more lights, connected to the hydraulic equipment and positioned to receive the unlock signal indicative of the hydraulic operation when the hydraulic initiation lever is in the active position, thereby to change the one or more indicators from a first operational state to a second operational state in response to reception of the unlock signal and to change the second operational state to the first operational state when the hydraulic initiation lever returns to the inactive position.