Pulverizing and grinding hammer

Details Pulverizing and grinding hammer Pulverizing and grinding hammer

1994-03-11

1995-11-14

Husar, John

Solid material comminution or disintegration

Processes

Subjecting material to impact by moving comminuting surface

241194, 241197, 241291, B02C 1304, B02C 1328

Patent

active

054659124

ABSTRACT:
An improved pulverizing and grinding hammer and methods of making and using such a hammer in a hammer mill are disclosed. The improved hammer has a substantially trapezoidal insert made of a hard metal such as STELLITE 12 that is brazed onto a groove in a conventional hammer to form a contact face having an approximately ten degree layback angle with the vertical. The improved hammer provides a clear visible boundary between the insert material and base metal of the hammer, which acts as a wear indicator when the layback angle wears to approximately 40 to 50 degrees, the critical angle at which the size reduction efficiency of the mill decreases.

REFERENCES:
patent: 1622849 (1927-03-01), Ruprecht et al.
patent: 2208892 (1940-07-01), Bukacek
patent: 2316124 (1943-04-01), Sheldon
patent: 2488799 (1949-11-01), Bonnafoux
patent: 2558107 (1951-06-01), Smith
patent: 2827242 (1958-03-01), Sheldon
patent: 3322356 (1967-05-01), Toews
patent: 3367585 (1968-02-01), Ratkowski
patent: 3561686 (1971-02-01), Hedrick
patent: 3612240 (1971-10-01), Hull
patent: 3844494 (1974-10-01), Hightower

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