Receptacles – Freight containers
Patent
1998-05-19
1999-12-21
Shoap, Allan N.
Receptacles
Freight containers
49386, 220668, 220828, B65D 8806, B65D 9066
Patent
active
060037059
ABSTRACT:
A portable bulk storage container having a counterweight mechanism for opening and closing a heavy lid. The container comprises a substantially gas and liquid tight tank secured inside of a frame. An opening is positioned on a front portion of a top of the tank. A lid is pivotally connected to the top of the tank for sealing the opening. A pair of fulcrums or connecting members extend from opposite sides of a rear portion of the lid. A counterweight is attached to each fulcrum. Each counterweight has an elongated lever end which extends away from the rear of the lid such that the counterweight can be used to rotate the lid between closed and open positions. Each counterweight is positioned beyond a side wall of the tank such that the counterweights can be rotated along the side wall of the tank, thereby effectively utilizing the limited amount of space available inside of the frame. The counterweights are of a sufficient length and weight in relation to the weight of the lid such that when the lid is placed in a closed or open position, the lid remains in that position under the normal force of gravity. The counterweights are further of a sufficient length and weight in relation to the weight of the lid such that the application of an additional force having a downward component to the lever end of the counterweight causes the lid to rotate between closed and open positions. The force for opening and closing said lid can preferably be provided by a person of ordinary weight.
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Magnum Mud Equipment Company
Merek Joe
Shoap Allan N.
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