Abstract: A bale feed mechanism comprising a feed bar carrying a plurality of tines and drive means for driving the feed bar, the drive means comprising a stationary element and a movable element, the movable element being movable about the center of the stationary element in a first direction of movement and drivingly connected to the stationary element in a manner so that it is caused to move in a second direction of movement about its own center when moved in said first direction, the feed bar being coupled to the movable element at a location offset from the center thereof.

Abstract: The invention relates to a rotary air filter for use in combination with a cooling radiator or another cooling device and which has to operate in a dusty atmosphere. The rotary air filter comprises a hollow rotary structure having a perforated rotary filter element mounted on the intake side of a fan operable to draw air through the filter element, the rotary structure having a generally unobstructed inner surface lengthwise thereof, and a discharge opening being provided adjacent the fan and generally in line with said unobstructed inner surface for enabling the discharge therethrough of foreign material entering through the perforations in the rotary filter element.