Ventilator anesthetic system having a manually operated safety v

Details Ventilator anesthetic system having a manually operated safety v Ventilator anesthetic system having a manually operated safety v

1995-05-12

1997-11-18

Lewis, Aaron J.

Surgery

Respiratory method or device

Means for mixing treating agent with respiratory gas

12820316, 12820324, 12820325, 12820524, A61M 1500

Patent

active

056877099

ABSTRACT:
Ventilators and anesthetic systems are generally equipped with a number of different safety functions. An improved, manually operated safety valve device has a valve element, slideingly or rotatably arranged in a valve seat inside a valve body. The valve element is connected to an operating element. In a sliding embodiment, when the operating element is not actuated the valve element is retained in a first position by a spring, which presses against the operating element. When the operating element is partly depressed, a gas channel is exposed to an input channel and gas can pass to an output channel at a first defined flow rate. The operating element can be affixed in this position by means of an arresting unit. If a larger flow of gas is needed, the operating element can be completely depressed, whereupon a flow-through channel with a lower resistance to flow opens to pass a second defined flow of gas. In a rotating embodiment, the degree of rotation of the valve element results in the same functions as the extent of depression in the sliding embodiment.

REFERENCES:
patent: 1870293 (1932-08-01), Miller
patent: 2593101 (1952-04-01), Campbell
patent: 3032063 (1962-05-01), Wells
patent: 3211419 (1965-10-01), Klinger-Lohr
patent: 3961645 (1976-06-01), Kagan
patent: 4304264 (1981-12-01), McClintock et al.
patent: 4699173 (1987-10-01), Rohling
patent: 5159924 (1992-11-01), Cegielski et al.
patent: 5398714 (1995-03-01), Price

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