US 7,448,568 B2
Shredder with rotatable sidewall
Hikoichi Katsumura, Hirakata (Japan); Saiji Yamashita, Hirakata (Japan); and Satoshi Ishii, Hirakata (Japan)
Assigned to Matsui Mfg. Co., Ltd., Osaka (Japan)
Filed on Mar. 24, 2006, as Appl. No. 11/388,605.
Application 11/388605 is a continuation of application No. 10/494167, filed on Apr. 29, 2004, granted, now 7,216,824.
Claims priority of application No. 2002-272376 (JP), filed on Sep. 19, 2002; and application No. PCT/JP03/09551 (WO), filed on Jul. 28, 2003.
Prior Publication US 2006/0180688 A1, Aug. 17, 2006
Int. Cl. B02C 1/08 (2006.01); B02C 7/00 (2006.01); B02C 13/00 (2006.01)
U.S. Cl. 241—243  [241/237] 10 Claims
OG exemplary drawing
 
1. A shredder comprising:
a pair of stationary side walls arranged with a predetermined interval;
a rotary shaft rotatably bridged over the stationary side walls and having a rotary blade;
a pair of support shafts bridged and fastened over lower end portions of the pair of stationary side walls in parallel with the rotary shaft;
pivotable side walls provided on each of the support shafts so as to pivot freely to be opened and closed;
a stationary blade provided in an inner side of one of the pivotable side walls and shredding a material to be treated in cooperation with the rotary blade; and
a scraper provided in an inner side of the other pivotable side wall, wherein the rotary blade is positioned between the stationary blade and the scraper, and wherein
said rotary blade is provided with an arm-shaped roughly cutting rotary blade and a finely cutting rotary blade having sawtooth-shaped shredding teeth in an outer periphery,
a cover member for covering a moving locus space of the roughly cutting rotary blade is provided so as to be positioned below the stationary blade and the scraper, said cover member having:
a first side member provided in one of the pivotable side walls;
a second side member provided in the other pivotable side wall; and
an intermediate member connecting the first side member and the second side member, being independent of the first and second side members and detachable from the shredder when said pivotable side walls are opened.