Front retracting plow

Details Front retracting plow Front retracting plow

2005-04-12

2005-04-12

Petravick, Meredith C. (Department: 3671)

Excavating

Snow or ice removing or grooming by portable device

Scraper blade

C037S274000

Reexamination Certificate

active

06877258

ABSTRACT:
The plow includes a vehicle mount for mounting the plow to a host vehicle, and a main blade mounted to the vehicle mount The plow further includes a pair of wing blades pivotally mounted to the main blade for travel in an arcuate path relative to the main blade, and four bar parallel arm linkages and actuators connected between opposing ends of the main blade and each of the wing blades for supporting and swinging the at least one wing blade in said arcuate travel path throughout the full distance between a retracted position in front of the main blade such that at least a substantial portion of the at least one wing blade is disposed in overlapping relation with the main blade, and an extended position in substantial longitudinal alignment with the main blade whereby a plurality of plowing widths is provided. It should be noted that the blade is advantageously used for the plowing of snow, however the plowing of other materials is envisioned such as sand or gravel.

REFERENCES:
patent: 3477151 (1969-11-01), Zanella
patent: 4356645 (1982-11-01), Hine et al.
patent: 4369847 (1983-01-01), Mizunuma
patent: 4479312 (1984-10-01), Turgeon
patent: 4667426 (1987-05-01), Howard et al.
patent: 4723609 (1988-02-01), Curtis
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patent: 5329708 (1994-07-01), Segorski et al.
patent: 5819444 (1998-10-01), Desmarais
patent: 5848654 (1998-12-01), Belcher, Jr.
patent: 5899007 (1999-05-01), Niemela et al.
patent: 6112438 (2000-09-01), Weagley

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