Plow assembly with adjustable trip mechanism

Excavating – Snow or ice removing or grooming by portable device – With specific means to facilitate connection to – or...

Reexamination Certificate

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C037S233000, C037S271000

Reexamination Certificate

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06895698

ABSTRACT:
A plow for mounting to a vehicle is disclosed. The plow can include a moldboard having a movable cutting edge and an adjustable bias trip mechanism having a biasing member preferably in the form of a spring. The adjustable trip mechanism can be arranged with the cutting edge of the moldboard to urge the cutting edge to a plowing position. The spring can be cooperatively arranged with a retainer, a pin for example, at one or more retaining positions to impart a preload biasing force upon the spring that varies according to the retaining position selected. The preload biasing force can act as a trip resistance force which must be overcome before the cutting edge moves. A lever tool can be provided for adjusting the spring.

REFERENCES:
patent: 2103775 (1937-12-01), Frink
patent: 2697289 (1954-12-01), Standfuss
patent: 3626614 (1971-12-01), Kahlbacher
patent: 3650054 (1972-03-01), Hanson
patent: 4215494 (1980-08-01), Farrell et al.
patent: 5109618 (1992-05-01), Grübler et al.
patent: 5121562 (1992-06-01), Feller
patent: 5191729 (1993-03-01), Verseef
patent: 5437113 (1995-08-01), Jones
patent: 6073371 (2000-06-01), Goos et al.

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