Excavating – Peat excavators
Patent
1978-07-05
1980-02-19
Eickholt, E. H.
Excavating
Peat excavators
172119, 56294, E01H 509
Patent
active
041887387
ABSTRACT:
A snow thrower machine and in particular an associated endless screw propeller unit which is adapted to strike or bite an encountered layer or crust of ice to break it into pieces of blowable sizes. This endless screw propeller unit includes an helicoidal blade wound around a transverse axis and having a limited number of teeth circumferentially spaced along the outer edge of the blade. The latter has outer edge portions radially diminishing toward and up to the teeth respectively, and leading the latter relative to the direction of rotation of the propeller blade whereby the leading edge of each tooth is adapted to strike and bite the ice to break it into pieces. The teeth do not protrude from the outer peripheral edge and from the leading face of the blade so as not to damage road pavement and not to impede the axial flow of snow and ice pieces towards the impeller of the machine.
REFERENCES:
patent: 1103242 (1914-07-01), Akins
patent: 1790789 (1931-02-01), Bosworth
patent: 2309418 (1943-01-01), Schweickart et al.
patent: 2597052 (1952-05-01), Barker
patent: 3073100 (1963-01-01), Kingsley
patent: 3295232 (1967-01-01), Oglesby et al.
patent: 3862539 (1975-01-01), Stevens
patent: 3913247 (1975-10-01), Ruhl
patent: 4139318 (1979-02-01), Jacob et al.
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