Clamshell

Details Clamshell Clamshell

1981-03-02

1983-09-20

Cherry, Johnny D.

Handling: hand and hoist-line implements

Hoist-line slings

Latch release

37187, B66C 302

Patent

active

044051670

ABSTRACT:
A clamshell comprises a U-shaped halfscoop carrier, two halfscoops pivoted to the legs of the half-scoop carrier on axes which are parallel to each other and to the central crosspiece connecting the legs, and actuating levers, which are secured to the half-scoops and to which the piston rod and the cylinder, respectively, of a transversely extending hydraulic actuator are pivoted at the free ends of the levers. The tubes connecting the top edges of the side walls of the half scoops are formed adjacent to their ends with radial slots extending over part of their periphery. The end portions of the T-shaped legs are provided with the bearing bores and extend through the radial slots. The side walls are formed with bores, which are aligned with the bores of the tubes and with the bearing bores and receive the pivot pins for the halfscoops.

REFERENCES:
patent: 376424 (1888-01-01), Barrows
patent: 1376847 (1921-05-01), Williams
patent: 2621428 (1952-12-01), Billings
patent: 3413029 (1968-11-01), Donovan
patent: 3774954 (1973-11-01), Taguchi et al.

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