Lifting mechanism for heavy street gratings

Details Lifting mechanism for heavy street gratings Lifting mechanism for heavy street gratings

1987-12-21

1990-05-29

Matecki, Katherine A.

Implements or apparatus for applying pushing or pulling force

Apparatus for hauling or hoisting load, including driven...

Device includes rotatably driven, cable contacting drum

254280, 254296, 254290, 254324, 254325, 4146843, B66D 126, B66C 2300

Patent

active

049289276

ABSTRACT:
A lifting mechanism is provided to unseat and lift manhole covers and gratings and to replace them after servicing, easily and safely. The mechanism includes a frame, winches, cables, and hooks to lift and lower the covers and gratings. The mechanism also includes spuds for fixing the frame in position to prevent it from rolling into the hole being worked on.

REFERENCES:
patent: D184343 (1959-02-01), Durbin
patent: 536282 (1895-03-01), Harper
patent: 776797 (1904-12-01), Plant
patent: 1101217 (1914-06-01), Stamm
patent: 2964327 (1960-12-01), Mohr
patent: 3973754 (1976-08-01), Chadwick, Jr.
patent: 4050587 (1977-09-01), Moen
patent: 4365925 (1982-12-01), Girtz

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