A - Human Necessities – 01 – D
Patent
A - Human Necessities
01
D
212/1, 56/62
A01D 34/44 (2006.01) A01B 33/14 (2006.01) A01D 34/535 (2006.01)
Patent
CA 2030575
A brush mower useful, for example, for clearing under power lines comprises a carrier platform or tractor, an articulating rotating crane and an auxiliary hydraulic power unit carried by the carrier platform and a brush mowing head carried by the articulating crane. The mowing head comprises a casing adapted to be mounted to a crane for travel over ground to be cleared, a motor carried by the casing, and a drum with a center shaft mounted for rotation in the casing and powered by the auxiliary hydraulic power unit and motor. The axis of rotation of the drum in use is generally parallel to the ground. The drum is a cylinder having a length at least twice its diameter and at least two hammer shafts running end to end parallel to the axis of rotation. The hammer shafts are in balanced relationship one to another to minimize rotational imbalance. The drum has interior circular reinforcing plates and end plates perpendicular to said axis of rotation and connected to the inner wall of the cylinder. There is a series of spaced apart outward facing interior semi-circular plates about the hammer shafts affixed to the drum wall and to which of the reinforcing plates as are contiguous thereto. The semi-circular plates define wells about the hammer shafts. The drum is slotted at the wells, with the slots associated with one hammer shaft being offset along the axis of the cylinder from those of another hammer shaft. Hammers are mounted on the hammer shafts for free rotation thereabout in each of the wells. The hammers, when the drum is rotating for mowing, protrude by centrifugal force beyond the slots and present a cutting edge to the brush being engaged. The drum is dynamically balanced for rotation at at least 1,000 rpm.
Brown John C.
Marks & Clerk
LandOfFree
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