Snowblower chisel attachment

Details Snowblower chisel attachment Snowblower chisel attachment

1997-05-29

1998-09-29

Graysay, Tamara L.

Excavating

Digging edge

Oscillating or reciprocating

37254, 37253, 37249, E02F 336

Patent

active

058131523

ABSTRACT:
A snowblower chisel attachment includes an oscillatable elongate blade member oscillatably disposed at a bottom front of a snowblower housing; a pair of support arms pivotally suspended from the sidewalls of the housing and being secured to the oscillatable elongate blade member; a pair of stub shafts journaled through the sidewalls of the housing; a pair of three lobed cams mounted to the stub shafts for contacting and urging the support arms and intervally urging the oscillatable elongate blade member forwardly relative to the housing; a plurality of sprockets for rotating the stub shafts and the cams; a pair of biased elements for urging the oscillatable elongate blade member rearwardly toward the housing; and skid members for vertically positioning the oscillatable elongate blade member relative to the surface. When the snowblower is turned on and the auger engaged, the sprockets rotate the stub shafts which rotate the cams which intervally urge the oscillatable elongate blade member forwardly to cut and chisel generally solidified snow lying in its path. Between the interval contacts by the lobes on the cam, biased elements urge the oscillatable elongate blade member rearwarly toward the housing and effect the oscillation of the oscillatable elongate blade member in combination with the cams.

REFERENCES:
patent: 1730817 (1929-10-01), Gyllenkrook
patent: 2198237 (1940-04-01), Voorderman
patent: 2610414 (1952-09-01), Vanick
patent: 2779112 (1957-01-01), Garland
patent: 3238646 (1966-03-01), Oldenburg
patent: 3340626 (1967-09-01), Konick
patent: 3475841 (1969-11-01), Delfino et al.
patent: 3490057 (1970-01-01), Kahlbacher
patent: 3576097 (1971-04-01), Speiser
patent: 3795070 (1974-03-01), Bronson et al.
patent: 4833800 (1989-05-01), Ting

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