Air pulse noise damper for a pneumatic tool

Details Air pulse noise damper for a pneumatic tool Air pulse noise damper for a pneumatic tool

B - Operations, Transporting

25

B

172/25

B25B 21/02 (2006.01) B23P 19/06 (2006.01) B25B 21/00 (2006.01) F01N 1/22 (2006.01)

Patent

CA 1054524

ABSTRACT OF THE DISCLOSURE A pneumatic tool having an exhaust air noise attenua- ting system is disclosed to damp out objectionable noises of pulsating sounds varying in pitch and intensity. In the system, air exhausting from a rotary air vane motor is caused to pass in order through an exhaust port, past a flexible leaf damper over- lying the exhaust port into a wave modulating chamber containing an air diffusion screen, and finally through ports exiting to atmosphere. The damper is illustrated in a first form as applied to the motor of an impact wrench; and is illustrated in a second embodiment as applied to a grinding tool.

271489

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