B - Operations – Transporting – 66 – F
Patent
B - Operations, Transporting
66
F
214/1
B66F 9/06 (2006.01) B66F 9/07 (2006.01)
Patent
CA 1062666
LIFT APPARATUS AND SAFETY BRAXE USABLE THEREWITH WILLIAM J. THOMAS A B S T R A C T In the preferred embodiment of the invention disclosed herein a lift apparatus includes a load carriage movable along a mast member by a hoist means including a cable supporting the load carriage and connected to a drive means. Also included is a safety brake including brake means operative to apply a braking force between the load carriage and the mast member and for supporting the load carriage on the mast member when the brake means is in its operative condition. In accordance with the invention, the brake means is controlled through an operating member which is actuated by either a first or second actuating means, each of which is independent of the other. The first actuating means is arranged to operate the brake means if the cable supporting the load carriage fails and the second actuating means is arranged to operate the brake means in response to an over-speed condition created by other failures in the hoist means.
278822
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