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US 4,259,794 AGranted
Snowplow
AssigneeC.E.P. Industries Limited
InventorAlbert Rath
Life of this patent
Estimating the term…
Abstract
In a snowplow having a steel blade and an auxiliary blade of elastomeric material which can be moved pivotally from an inoperative to an operative position, power means are provided for raising and lowering the steel blade between first and second working positions. In the second working position the scraping edge of the steel blade is raised from the ground and the auxiliary blade is pivotally moved into cooperative alignment with it, the blade structure as a whole being tilted forwardly to change the angle of attack of the scraping blade.
Claims10
A snowplow mechanism comprising, in combination:
- a support frame;
- a forwardly mounted blade structure articulately connected to the support frame for movement between first and second working positions;
- said blade structure comprising a main blade portion having a horizontal scraping edge and an auxiliary scraping blade of elastomeric material pivotally connected to the main blade portion for movement about a horizontal pivotal axis between an operative position, in which it is juxtaposed with said horizontal scraping edge in cooperative alignment with the main blade portion, and an inoperative position;
- first power means mounted on the support frame and connected to the main blade portion for moving the blade structure between said first working position, in which the horizontal scraping edge is in ground engaging relation, and said second working position in which the horizontal scraping edge is raised;
- and
- second power means connected between said main blade portion and said auxiliary scraping blade, said second power means being operable when the blade structure is in the second working position for moving the auxiliary blade between its operative and inoperative positions, said first power means including a first pair of hydraulic cylinders for raising and lowering the blade structure and a second pair of hydraulic cylinders for tilting the blade structure about a horizontal axis between first and second limit positions which are angularly offset with respect to one another.
3 more elements
A snowplow mechanism comprising, in combination;
- a wheeled support frame,
- an intermediate support structure pivotally connected to the support frame,
- first power means mounted on the support frame and connected to said intermediate support structure for raising and lowering the intermediate support structure being upper and lower limit positions,
- a forwardly mounted blade structure pivotally connected to the intermediate support structure for pivotal movement about a horizontal axis,
- second power means mounted on the support frame and connected to said blade structure for tilting the blade structure about said horizontal axis between first and second limit positions,
- said first and second power means being operable in combination to move the blade structure between first and second working positions,
- said blade structure comprising a main blade portion having a horizontal scraping edge which, in said first working position of the blade structure, is in ground engaging relation and, in said second working position, is raised from the ground,
- said blade structure further comprising an auxiliary scraping blade of elastomeric material pivotally connected to the main blade portion for movement about a horizontal pivotal axis between an operative position in which it is juxtaposed with said horizontal scraping edge in cooperative alignment with the main blade portion and an inoperative position in which it is angularly offset with respect to the main blade portion, and
- third power means connected between the main blade portion and the auxiliary scraping blade, said third power means being operable when the blade structure is in the second working position for moving the auxiliary blade between its operative and inoperative positions.
6 more elements
Dependencies are inferred from the claim text.