US D243412 S
Abstract available in
FIG. 1 is a perspective view taken from the top, one side and one end of a pressure relief valve for a low pressure cuffed tracheostomy tube showing our new design.
FIG. 2 is an elevational view taken from the side opposite that shown in FIG. 1.
FIG. 3 is an elevational view taken from the end opposite that shown in FIG. 1.
FIG. 4 is a bottom plan view thereof.