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US 4,398,531 AGranted
Percussor
AssigneeHudson Oxygen Therapy Sales Company
InventorHarold R. Havstad
Life of this patent
Estimating the term…
Abstract
An improved percussor assembly having a reciprocating percussion member for directing reciprocating motion to a user including a valve responsive to movement of the percussion member for temporarily and alternately interrupting the flow of gas in the percussor in response to the alternate movement of the reciprocating percussion member.
Claims4
A percussor comprising:
- a reciprocating assembly comprising a reciprocating plate and an applicator cooperating therewith for directing reciprocating motion from said plate to a user,
- a gas outlet passageway, a gas pressure chamber and releasable gas sealing means for forming a gas-tight seal therebetween,
- a gas inlet passageway communicating with said gas pressure chamber for introducing gas thereto at a pressure sufficient to release said gas-tight seal causing movement of said reciprocating assembly,
- valve means for temporarily interrupting the flow of gas from said gas inlet passageway to said gas pressure chamber when said reciprocating assembly is moved, and
- a valve actuation means rigidly secured to said reciprocating assembly and simultaneously reciprocating therewith for alternately opening and closing said valve means.
2 more elements
Dependencies are inferred from the claim text.