| US 7,475,837 B2 | ||
| Shredder head having shredder blades and an associated safety feature for protecting a portion of a person's body | ||
| Aron Abramson, 2025 E. 9 St., Brooklyn, N.Y. 11223 (US); and Charles Sued, 3360 Bedford Ave., Brooklyn, N.Y. 11210 (US) | ||
| Filed on Oct. 23, 2007, as Appl. No. 11/876,917. | ||
| Application 11/876917 is a continuation of application No. 11/379869, filed on Apr. 24, 2006. | ||
| Application 11/379869 is a continuation in part of application No. 11/277832, filed on Mar. 29, 2006, granted, now 7,303,158. | ||
| Prior Publication US 2008/0111010 A1, May 15, 2008 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. B02C 25/00 (2006.01) | ||
| U.S. Cl. 241—30 [241/36; 241/37.5; 241/100; 241/101.3; 241/236] | 20 Claims |
| 1. A shredder head having shredder blades and an associated safety feature for protecting a portion of a person's body, comprising:
a shredder head housing having an outside surface and defining a slot adapted to receive material to be shredded, the shredder
head housing including a slot;
a plurality of shredder blades disposed within the shredder head housing and adapted to shred the material inserted into the
slot;
a first conductive layer disposed along the shredder head housing;
a second conductive layer disposed on the shredder head housing and separated from the first conductive layer, wherein the
first and second conductive layers are located within the slot such that the portion of the person's body can touch any portion
of the outside surface of the shredder housing without contacting either of the first and second conductive layers;
a first controller in communication with the shredder and adapted to cause the plurality of shredder blades to deactivate;
and
a second controller in communication with at least one of the first and second conductive layers and with the first controller,
the second controller being adapted to discriminate between contact with the portion of the person's body and metallic and
magnetic objects, wherein when the portion of the person's body touches both the first and second conductive layers the second
controller is configured to send a signal to the first controller, when the first controller receives the signal the first
controller deactivates the plurality of shredder blades, wherein the shredder is configured such that the plurality of shredder
blades are not deactivated when only one of the first and second conductive layers is touched by a portion of the person's
body.
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