Patent ID: 6935095
Filing Date: 2005-08-30
Classification: A01D,Y10S

Abstract:
1. A rotary lawnmower blade assembly comprising: a) a rectangular body having a centrally located aperture of a size for mechanical attachment to a lawnmower power shaft, the body being of a predetermined thickness; b) a pivot lock having a lock bar, a pivot boss and a locator boss; c) the body having at each end an end aperture at a predetermined position and sized for accepting the locator boss; d) the locator boss being slidably assembled into the end aperture and fastened to the body; e) the body having at each end a cavity of a predetermined size and at a location adjacent to the pivot locks, the cavities being on opposite sides of the longitudinal axis of the body; f) a blade being symmetrical when rotated around its longitudinal axis; g) the blade having cutting edges parallel with the blade's longitudinal axis; h) the blade having a blade-mounting end comprising a blade aperture and a slot, the slot being radially connected to the blade aperture; and i) the blade having a grass turbulence left surface and a grass turbulence right surface causing a rotational air disturbance resulting in cut grass exiting the lawnmower during rotation of the blade; wherein the lawnmower blade assembly is assembled by aligning the blade aperture and the slot over the lock bar with the blade-mounting end of the blade in the cavity; then sliding the blade over the lock bar until the blade aperture engages the pivot boss, then the lockbar is slid through the slot until the blade is parallel with the body; then the blade is moved laterally until the blade aperture is in slidable contact with the pivot boss; then the blade is pivotally rotated until the slot is perpendicular to the lock bar so that the blade is in a locked position.