Cutlery – Cutting tools – Hatchet – ax – or adze
Patent
1990-08-03
1991-06-04
Bray, W. Donald
Cutlery
Cutting tools
Hatchet, ax, or adze
144193C, 254104, B26B 2300
Patent
active
050202251
ABSTRACT:
A splitting tool comprising a splitting head mounted on a handle. The splitting head comprises at least two relatively rotatable wedges, at least one of which is also freely rotatable with respect to the handle. Each wedge has a front edge for striking and penetrating an object to be split. The freely rotatable wedge has a lobe rearward of the front edge and a center of mass located in the lobe, the center of mass being offset from the axis of rotation of the freely rotatable wedge. The offset center of mass creates a force moment about the axis of rotation. The force moment has a first rotational sense tending to align the front edges of each wedge along a common plane when the splitting head is impelled toward the object and a second and opposite rotational sense tending to separate the front edges of each wedge when the splitting head strikes the object, thereby applying splitting forces to the object in directions generally perpendicular to the common plane.
REFERENCES:
patent: 443581 (1890-12-01), Marshall
patent: 3865163 (1975-02-01), Root
patent: 4044808 (1977-08-01), Kolonia
patent: 4372360 (1983-02-01), Eichlin
patent: 4383562 (1983-05-01), Hockman
patent: 4440205 (1984-04-01), Hillinger
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