Apparatus for automatic ventilation of the lungs

Details Apparatus for automatic ventilation of the lungs Apparatus for automatic ventilation of the lungs

1978-09-25

1980-07-01

Michell, Robert W.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820518, 92 131, A62B 700, A61M 1500

Patent

active

042101360

ABSTRACT:
A piston type air pump, for forced lung ventilation, with a variable length of stroke and a variable timing of inspiratory and expiratory phases. The pump includes a stepless change, variable radius crank arm, controllable during pump operation for changing the volume capacity of the pump. The drive motor is arranged for movement for varying the timing of piston in-movement to the piston out-movement for varying the time ratio of inspiration to expiration.

REFERENCES:
patent: 3149591 (1964-09-01), Aiki et al.
patent: 4076021 (1978-02-01), Thompson

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