Patent ID: 6752764
Filing Date: 2004-06-22
Classification: A61B

Abstract:
A sphygmomanometer comprising:a body having a tube therein for holding and guiding a column of mercury; the tube having a bottom and a top; an air reservoir communicating with the top of the tube; an air valve communicating between the air reservoir and the outside for permitting the air reservoir to adopt outside pressure, and the valve being closeable to prevent entrance or exit of air in the reservoir and the tube; a mercury reservoir communicating with the tube for supplying mercury that rises in the tube dependent upon pressure applied in the mercury reservoir; a pressure connection to the mercury reservoir for supplying pressure to drive mercury up the tube; a first measuring scale at the tube and the body for indicating the height of the mercury column in the tube when the valve is open, and a second measuring scale at the tube and the body for indicating the height of the mercury column in the tube when the valve is closed.