Hammer tool for boom mountable power hammer

Details Hammer tool for boom mountable power hammer Hammer tool for boom mountable power hammer

1997-03-06

1999-03-23

Bagnell, David J.

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

Percussive tooth or bit

175414, 299 374, E21B 1036

Patent

active

058849785

ABSTRACT:
An improved hammer tool (20) for a boom mountable power hammer (14) for use in demolishing a work surface (12) of concrete and the like. The hammer tool (20) includes an elongated cylindrical body (22) having a first end (24) and a second end (26). The first end, (24) has a shank (28) of a size and shape to be received into the commercial power hammer (14). A hammer head (30) includes a top (32) and a bottom (34). The top (32) connects the hammer head (30) to the second end (26) at a transition section (38). The bottom (34) includes a convex shaped radial striking face (40), which is a portion of a sphere having a center (54) within a portion of the body. In use, the shank (28) and a portion of the body (51) containing center (54) is received and supported within the power hammer (14). The hammer head (30) is raised and lowered to make striking contact with the work surface (12) in a number sufficient to demolish the work surface (12). Resulting stress from the impact, or striking contact, is concentrated at the center (54) within the power hammer supported portion of the hammer tool body (51) in order to reduce stress fracture failure of the hammer tool.

REFERENCES:
patent: 1893596 (1933-01-01), Perkins

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