Lifter for valve-boxes

Details Lifter for valve-boxes Lifter for valve-boxes

1979-04-20

1980-09-02

Marbert, James B.

Handling: hand and hoist-line implements

Grapple

Fixed and moveable jaw

294 28, B25B 700

Patent

active

042203660

ABSTRACT:
There is disclosed a lifting device for removing valve-boxes and sections thereof wherein a pair of pivoted, opposed side frames are pivoted about a pair of linking bars to securely grip the valve-box. The lifting device further includes a pair of adjustable locking hinges to provide more tension for a more secure grip about the valve-box, whereby the valve-box can subsequently be removed from the ground in which it was previously implanted.

REFERENCES:
patent: 698616 (1902-04-01), Zwerner
patent: 1147316 (1915-07-01), Evans
patent: 1212822 (1917-01-01), Schlepp
patent: 1330487 (1920-02-01), Mullen
patent: 1563600 (1925-12-01), Walton
patent: 1716849 (1929-05-01), Culp

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