Patent ID: 11885176
Assignee: nan
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 4:
5. Operating equipment comprising:
a structure defining a confined space and comprising at least a first access opening comprising a width for ingress into and egress from said confined space;
a source for supplying at least one operating condition to the confined space for performing an operation, wherein said at least one condition would present an imminent danger to the survivability of a human adult present within said confined space during said operation;
a selectively openable and closable access barrier which is selectively movable from a closed position to an open position, said access barrier openable to an open position which permits ingress to and egress from said confined space through said first access opening and closable to a closed position which does not permit ingress and egress through said first access opening;
a safety gate movable from a closed position, wherein the gate extends across a substantial portion of the width of said first access opening and obstructs the ingress of an adult human into said confined space through said first access opening, to a safety position which does not permit said access barrier to be positioned in said closed position.