Pneumatic tool with muffler bypass mechanism

B - Operations – Transporting – 25 – F

Patent

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Details

B25F 5/00 (2006.01) F01N 13/08 (2010.01) F01N 1/08 (2006.01)

Patent

CA 2442156

A pneumatic tool (10) has a housing (11) with an external surface and defining a plurality of cavities therein to hold components of the pneumatic tool. The housing defines a motor cavity wherein a pneumatic motor is disposed. Two spaced-apart vents extend from the motor cavity to the external surface of the housing, and a muffler is mounted adjacent to one vent. A tubular sleeve, which includes a radially extended discharge portion from which exhaust may escape, is mounted on the external surface of the housing and cooperates with it to define an annular exhaust passageway. The sleeve is rotatable between muffled and unmuffled positions wherein the discharge portion is respectively adjacent to the one vent or the other.

L'invention concerne un outil pneumatique (10) comprenant un logement (11) présentant une surface extérieure et une pluralité de cavités permettant de maintenir les composants de l'outil pneumatique. Le logement définit un compartiment de moteur dans lequel un moteur pneumatique est installé. Deux évents éloignés l'un de l'autre s'étendent depuis le compartiment de moteur vers la surface extérieure du logement, un silencieux étant monté à côté de l'un des évents. Un manchon tubulaire pourvu d'une portion de décharge depuis laquelle l'échappement peut être évacué, est monté sur la surface externe du logement, il coopère avec cette surface pour définir une voie de passage annulaire de l'échappement. Le manchon est pivotant entre des positions étouffée et non étouffée, la portion de décharge se plaçant respectivement à côté de l'un ou l'autre des évents.

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