Patent ID: 11866298
Assignee: OTIS ELEVATOR COMPANY
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 10:
11. A method of carrying out a handover test for an elevator counterweight assembly (11), the method comprising:
selectably actuating a mechanical actuator (22) disposed vertically above a safety actuation mechanism to apply a downward acting force to the safety actuation mechanism (16), comprising a connection for a suspension member (17), and thereby move the safety actuation mechanism (16), relative to a counterweight structure (38), from a normal position to a safety position, wherein in the safety position the safety actuation mechanism (16) is arranged to actuate at least one safety brake (12a, 12b) and thereby brake the counterweight structure (38), the mechanical actuator configured to be selectably actuated by rotating the mechanical actuator to produce the downward acting force and actuate the at least one safety brake to test operation of the safety actuation mechanism; and
checking that the at least one safety brake (12a, 12b) is correctly actuated;
wherein the safety actuation mechanism (16) comprises at least one lever (19a, 19b), wherein the at least one safety brake (12a, 12b) comprises a safety brake arm (26a, 26b), and wherein the at least one lever (19a, 19b) contacts the safety brake arm (26a, 26b), such that when the safety actuation mechanism (16) moves between the normal position and the safety position, the at least one lever (19a, 19b) is moved, thereby moving the safety brake arm (26a, 26b), which causes actuation of the safety brake (12a, 12b); and
wherein the at least one lever pivots relative to the connection when moved between the normal position and the safety position.