Surgery – Respiratory method or device – Ozone or ion generation
Patent
1980-05-30
1982-11-02
Apley, Richard J.
Surgery
Respiratory method or device
Ozone or ion generation
128274, A61M 100
Patent
active
043568238
ABSTRACT:
A medical suction control unit of the type operated by occlusion of a control port to prevent entry of atmospheric pressure into a control chamber, in which the valving element is free to move bodily between open and closed positions in response to the closing and opening of the control port, with the vacuum bleed passage, which enables air to be withdrawn from the control chamber, establishing flow around the side of the valving element. The vacuum bleed passage is shown formed by a channel in one or the other of the contacting surfaces, at the point where the valve element rests upon a surface of the housing. The valve element is shown in the form of an elastomeric disk which has sufficient structural strength to resist detrimental deformation under vacuum, and which has sufficient thickness to guide itself in its bodily movement. In one form the unit employs a plug-form member attached to the valve element and entering the intake chamber to reduce objectionable noise. The unit can be assembled by mere insertation of the free-floating valve element and snap-fit of a cap into sealing relationship with the housing, or by indenting the walls of the housing to confine the free moving valve element within the housing.
REFERENCES:
patent: 2951496 (1960-09-01), Yarnall et al.
patent: 3469582 (1969-09-01), Jackson
patent: 3904168 (1975-09-01), Marocco
patent: 3964484 (1976-06-01), Reynolds et al.
patent: 4128227 (1978-12-01), Blomquist
Apley Richard J.
Kruter J. L.
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