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US 5,769,797 AGranted
Oscillatory chest compression device
AssigneeAmerican Biosystems, Inc.
InventorsNicholas P. Van Brunt, Donald J. Gagne
Life of this patent
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Abstract
An oscillatory chest compression device includes an oscillatory air flow generator and a positive air flow generator. A first feedback system controls the oscillation rate of the oscillatory air flow generator, and a second feedback system controls the peak pressure created by the positive air flow generator.
Claims15
An apparatus for generating oscillatory air pulses in a bladder positioned about a person, comprising:
- an oscillatory air flow generator, comprising
- an air chamber;
- a reciprocating diaphragm operably connected with the air chamber;
- a rod having a first end and a second end, the first end operably connected with the diaphragm, and the rod extending generally orthogonal to the diaphragm;
- a crankshaft operably connected with the second end of the rod and extending generally orthogonal to the rod;
- and
- a first motor operably connected with the crankshaft;
- a positive air flow generator operably connected with the oscillatory air flow generator;
- control means operably connected with the oscillatory air flow generator and operably connected with the positive air flow generator for controlling the peak pressure generated by the positive air flow generator;
- and
- a seal extending from an outer periphery of the diaphragm to a wall of the air chamber, the seal comprising first and second generally opposed disks defining an annular region for receiving air, and a pump operably connected with the annular region, the pump maintaining the air pressure in the annular region greater than the peak pressure generated in the air chamber.
8 more elements
Dependencies are inferred from the claim text.