Spring-loaded teeth for comminuter rolls

Details Spring-loaded teeth for comminuter rolls Spring-loaded teeth for comminuter rolls

1990-10-24

1991-11-12

Spruill, Robert L.

Metal deforming

Process

Deforming sheet metal

72324, 761011, 761081, 29557, B02C 1818, B21D 3700, B21K 2112, B23P 1304

Patent

active

050637681

ABSTRACT:
A tooth for use in a comminuter roll comprises a roll of spring steel having a first end formed into a point or other abrading shape. The tooth is compressed upon insertion into a mounting hole in the roll and the inherent spring of the steel tends to force the tooth back to its original size, thereby creating forces on the interior of the mounting hole to form an interference fit that holds the tooth in place in the mounting hole. In a preferred embodiment, the tooth is formed of a roll of spring steel having a G-shaped cross section. This shape provides an opening through the length of the tooth and also leaves a solid piece in the center of the tooth to aid in tooth removal. A rod can be slipped through the lengthwise opening of the first tooth so that its end abuts the solid center portion of the second tooth that is colinearly mounted in the other end of the hole that the first tooth is mounted in. Tapping the rod will force the second tooth out of its hole without disturbing the first tooth. The steel piece can be cut either before or after rolling to form suitable abrading ends on the teeth and a back end of the tooth can be chamfered to make the tooth easier to insert in the hole of the roll.

REFERENCES:
patent: 263162 (1882-08-01), Gerald
patent: 1933559 (1933-11-01), Kovar
patent: 2459568 (1949-01-01), Lyon
patent: 2846902 (1958-08-01), Cowley
patent: 2944549 (1960-07-01), Alexander
patent: 3136202 (1964-06-01), Wagner
patent: 3173200 (1965-03-01), Dunmire et al.
patent: 4056961 (1977-11-01), Jamison

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