Silencing means for rotary cutting tools particularly circular s

Details Silencing means for rotary cutting tools particularly circular s Silencing means for rotary cutting tools particularly circular s

1977-04-27

1979-02-06

Schran, Donald R.

Cutting

Rotatable disc tool pair or tool and carrier

With guard for tool

144251R, 181205, B27G 1902, B23Q 1106

Patent

active

041378067

ABSTRACT:
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.

REFERENCES:
patent: 2781067 (1957-02-01), Kaley
patent: 2926709 (1960-03-01), Kaley
patent: 3688866 (1972-09-01), Kong
patent: 3913437 (1975-10-01), Speer
patent: 4043444 (1977-08-01), Bobeczko

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