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A rotary mower having an inverted housing with a discharge opening formed in the rear surface thereof, the opening having a cover plate which is hinged at the rear edge of the housing and biased into a normally closing position. The plate has a pair of integral arms projecting beyond the hinge at it

A rotary mower having an inverted housing with a discharge opening formed in the rear surface thereof, the opening having a cover plate which is hinged at the rear edge of the housing and biased into a normally closing position. The plate has a pair of integral arms projecting beyond the hinge at its lateral edges. A pair of parallel guide plates are secured to the housing in positions closely alongside the respective arms, the guide plates having angled but parallel slots extending forwardly and downwardly therein. A grass catcher is provided having a mouth dimensioned to receive the cover plate and including a support bar spaced horizontally above the mouth, the support bar, upon insertion into the slots, serving to engage the arms for progressively swinging of the cover plate into a horizontally extending position within the catcher. The arms are provided with radially facing notches complimentary to the bottoms of the respective slots for latching the bar captive with the catcher in its receiving position. A third arm is provided on the cover plate extending beyond the first two arms for purposes of manual release.

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In a rotary mower assembly, the combination comprising a mower having an inverted housing containing a rotary blade with means on the housing for driving the blade, the housing having a rear edge and a planar rear surface adjacent thereto having an extensive discharge opening, a substantially flat c

In a rotary mower assembly, the combination comprising a mower having an inverted housing containing a rotary blade with means on the housing for driving the blade, the housing having a rear edge and a planar rear surface adjacent thereto having an extensive discharge opening, a substantially flat cover plate dimensioned to cover the opening, hinge means located at the rear edge of the housing for hingeing the cover plate for swinging movement between a vertical closing position and an upraised, substantially horizontal open position, means for biasing the cover plate to its closing position, the plate having a pair of integral arms projecting upwardly adjacent the lateral edges of the plate and presenting operating surfaces substantially in the plane of the plate, a pair of parallel guide plates secured to the top of the housing adjacent the rear edge thereof in vertically extending position, the guide plates being closely spaced alongside of the respective arms, the guide plates having angled but parallel slots formed therein accessible from their rear edges and extending forwardly and downwardly to a bottom portion spaced forwardly of the hinge and substantially at hinge level, a grass catcher having a frame defining a mouth dimensioned to accommodate the cover plate and including a support bar spaced forwardly from the mouth and parallel thereto, the pair of arms having respective notches at their ends, the notches being rearwardly facing when the arms are in vertical position, the notches being complementary to the bottom portions of the respective slots so that when the bar on the catcher is registered with the slots and pressed forwardly therein the bar engages the operating surfaces on the arms for progressively swinging the cover plate into horizontal position until the bar reaches the bottom portions of the slots where it is latched captive between the notches and the respective slots thereby attaching the grass catcher to the mower and holding the cover plate in an open position to create a path for discharge of clippings into the mouth of the bag.