The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 11, 1979
Filed:
Dec. 28, 1977
Ole B Kohnke, Lyngby, DK;
Other;
Abstract
A manually operated lung-venting apparatus includes a self-expanding bladder having a bladder inlet through which treating gas is drawn into the bladder during expansion thereof and a bladder outlet through which treating gas is driven out of the bladder during compression thereof. The apparatus further comprises a valve device having a housing attached to the bladder; and inlet chamber in the housing; a valve inlet for establishing communication between the bladder and the inlet chamber; a valve outlet which is in continuous communication with the inlet chamber and which is adapted to be connected to the respiratory system of a patient. The valve device further has a movable valve member which comprises a valve stem and a resiliently flexible, soft valve flap carried thereby and which is supported in the housing and cooperating with the valve inlet to open or close the same; and a control mechanism connected to the valve stem for moving and maintaining the movable valve stem in a closed position when the pressure in the inlet chamber exceeds a predetermined value above the ambient pressure and for moving and maintaining the valve stem in an open position when the pressure in the inlet chamber is below the predetermined value. The valve flap, in the closed position of the valve stem, readily conforms to the valve seat and, if the pressure in the inlet chamber exceeds that prevailing in the bladder, the valve flap lifts off its seat independently of the position of the valve stem.