Adjustable lifting device

Details Adjustable lifting device Adjustable lifting device

1996-08-20

1997-08-26

Cherry, Johnny D.

Handling: hand and hoist-line implements

Hoistline attached load supporting frame

Load capturing supports

294 90, 294 93, B66C 154, B66C 166

Patent

active

056604220

ABSTRACT:
An adjustable lifting device for lifting a manhole casting. The device has two endpieces each having a lifting flange for engaging and lifting the manhole casting. One endpiece is extended into engagement with the casting by one or more springloaded telescoping extension arms. Once positioned, the device is lockable to prevent retraction of the extension arm(s). A slidable and lockable collar is provided for effectuating balancing of the device and casting. Each endpiece has a safety stop to prevent the device from dropping into the casting once the lifting flanges are positioned beneath the inner ledge of the casting.

REFERENCES:
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patent: 4696503 (1987-09-01), Collodel
patent: 5306062 (1994-04-01), Dodge
patent: 5476300 (1995-12-01), Dodge

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