Pneumatic motor

Details Pneumatic motor Pneumatic motor

F - Mech Eng,Light,Heat,Weapons

01

N

172/25

F01N 1/00 (2006.01) B25D 9/00 (2006.01)

Patent

CA 1151554

ABSTRACT A reciprocating pneumatic motor for rock drills and the like wherein a freely-movable hammer piston repeatedly strikes the end of a drill rod, usually a rotating drill rod. Fluid under pressure enters a single, central inlet port in the wall of a cylinder which houses the piston with alternate cycling ports being incorporated into the piston itself. A muffler for receiving exhaust gas surrounds the cylinder and includes an annular wall of resilient material; annular spacers separating the wall from the cylinder, the spacers having openings through which the exhaust gas can pass; and an opening in the annular wall through which exhaust gas, after passing through the spacer openings, can pass to the atmosphere.

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