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US 4,361,140 AGranted
Cardiopulmonary resuscitator massager pad
AssigneeMichigan Instruments, Inc.
InventorClare E. Barkalow
Life of this patent
Estimating the term…
Abstract
A cardiopulmonary resuscitator massager pad is provided comprising a compressible, fluid filled enclosure adapted for mounting on the reciprocal piston of a cardiopulmonary resuscitator. The massager pad includes means for restricting lateral expansion of the enclosure and a face including means for evenly distributing the pressure of the fluid in the enclosure on the patient's chest.
Claims11
A cardiopulmonary resuscitator comprising in combination:
- compressor means including a reciprocating piston for periodically applying a compressive force to a patient's chest;
- ventilator means for periodically ventilating the patient's lungs;
- and
- a compressible fluid filled enclosure disposed on the end of said reciprocating piston for compression between said piston and the patient's chest, said enclosure being filled with a substantially incompressible fluid and said enclosure comprising a nonisoelastic structure that is deformable in directions parallel to the path of travel of said reciprocating compressor piston and that is rigid in directions transverse to the path of travel of said piston, whereby the compressive force of said piston is evenly distributed over a large area on the patient's chest while providing direct correspondence between the displacement of said piston and the deflection of the patient's chest.
1 more element
Dependencies are inferred from the claim text.