Measuring and testing – Instrument proving or calibrating – Fluid pressure
Patent
1999-09-21
2000-07-04
Raevis, Robert
Measuring and testing
Instrument proving or calibrating
Fluid pressure
G01C 2500
Patent
active
060821701
ABSTRACT:
A gage mechanism for a blood pressure measuring device or other similar apparatus includes a supported shaft member having one end in contact with an inflatable bellows. A pointer is attached at an opposite end of the shaft and a helically wound spring is attached to the shaft and a supporting structure. As the bellows inflates, the shaft is axially displaced and causes rotation due to the constraint of the helical ribbon spring, causing a corresponding angular deflection of the attached pointer relative to an indicating scale. The mechanism includes a first adjustment member for allowing the pointer to be preset to a zero or calibrated position, and a second adjustment mechanism that controls the amount of angular rotation of the shaft and pointer for a displacement of the bellows.
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Danna Dominic
Johnson Edward A.
Krauter Allan I.
Lia Raymond A.
Smith Timothy J.
Raevis Robert
Welch Allyn Inc.
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