Patent ID: 6875186
Filing Date: 2005-04-05
Classification: A61H

Abstract:
1. A percussive device comprising: a) a housing having a piston chamber and a valve chamber; b) a piston that slides in a reciprocating motion in the piston chamber; c) a floating valve that slides in a reciprocating motion in the valve chamber, the floating valve connected to the piston; d) an inlet port in the housing; e) an exhaust port in the housing; f) a channel connecting the inlet port and the exhaust port; and g) a source of pressurized gas in connection with the inlet port; such that when the piston is depressed, the floating valve and piston cooperate to cause the reciprocating motion and wherein: h) the piston is a solid first cylinder having an annular piston ring of smaller diameter than the first cylinder; i) a piston o-ring is seated in the annular piston ring such that a substantially air-tight seal is formed between the piston o-ring and the piston chamber; j) the floating valve is a valve assembly comprising: