Title: Endless screw propeller unit for a snow thrower

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.

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Inventors: Vohl, Paul-Eugene (St. Marc des Carrieres, CA, US)

Application Number: 922073
Filing Date: 1978-07-05
Publication_date: 1980-02-19
Assignee:
Primary Class(es): 37/257 37/251, 56/294, 172/119
Other Classes:
US Patent Ref:

1103242	Jul, 1914	Akins	172/119.
1790789	Feb, 1931	Bosworth	37/43.
2309418	Jan, 1943	Schweickart et al.	198/676.
2597052	May, 1952	Barker	37/43.
3073100	Jan, 1963	Kingsley	37/43.
3295232	Jan, 1967	Oglesby et al.	37/43.
3862539	Jan, 1975	Stevens	56/294.
3913247	Oct, 1975	Ruhl	37/43.
4139318	Feb, 1979	Jacob et al.	37/43.

Other Refs: 69152692634771612728193252631224143

Jun, 1915	AT
Jul, 1915	AT
Sep, 1951	CA
Apr, 1914	DE2
Sep, 1919	DE2
Jun, 1960	FR

Primary Examiner: Eickholt, E. H.
Assistant Examiner:
Attorney: