Patent ID: 6286696
Filing Date: 2001-09-11
Classification: B66C

Abstract:
A gantry crane having frame and a hoist system including:a grappler;a hoist actuator mounted to the frame;a clevis operably driven by the actuator for linear movement relative to the frame, the clevis including a catch member;a flexible hoist line having an end mounted to the clevis, wherein the line extends from the clevis and, in tension, supports the grappler so that movement of said clevis is effective to cause movement of the hoist line which, in turn, is effective to cause vertical movement of said grappler; anda hoist locking device including a latch member mounted to the frame for selective movement to engage the catch member of the clevis to thereby prevent movement of the hoist line and, in turn, to prevent downward movement the grappler which is supported by the tension of the hoist line.