Silencing means for rotary cutting tools and particularly...

Details Silencing means for rotary cutting tools and particularly... Silencing means for rotary cutting tools and particularly...

B - Operations, Transporting

27

B

143/83

B27B 5/38 (2006.01) B23D 47/00 (2006.01) B23Q 11/00 (2006.01) B27G 19/04 (2006.01) G10K 11/16 (2006.01)

Patent

CA 1052240

ABSTRACT OF THE DISCLOSURE Noise output of a rotary cutting tool such as a circular saw blade is substantially reduced by means of a guard which wholly encloses the blade when the blade is not cutting and which comprises fixed and movable imperforate guard members, the movable guard member being movable to expose only the cutting segment of the blade. Inner surfaces of the flat side walls of the guard have sound absorbing means such as a Helmholtz resonator array or a layer of acoustical foam. Modifications of the guard to optimize its silencing effectiveness are disclosed.

285094

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