Hoisting apparatus for use at a manhole

Details Hoisting apparatus for use at a manhole Hoisting apparatus for use at a manhole

2007-05-08

2007-05-08

Brahan, Thomas J (Department: 3654)

Traversing hoists

Having means facilitating assembly or disassembly

Of traversing hoist from support

Reexamination Certificate

active

10508645

ABSTRACT:
A hoisting apparatus (10) for use at a manhole (1), comprising a supporting mast and a jib crane (14) connected at an angle to an upper end portion (16) of the supporting mast (12). The jib crane (14) has a front member (18) pointing upwardly and extending on one side of the supporting mast (12) and a rear member (20) having a rear end section (22) extending on another side of the supporting mast (12). A linking rod (24) is connecting the rear member of the jib crane (14) to the supporting mast (12). The apparatus further comprises a winch mechanism (30) mounted onto the jib crane (14) and having a cable (32) cooperating with the front member (18) of the jib crane (14) for hoisting an object from the manhole (1). In a preferred embodiment, the apparatus comprise a security fence (40) for surrounding at least partially the manhole (1) and preventing accidental entry therein, the supporting mast (12) being part of the fence.

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