Mechanism for measuring device

US5966829A · kind A · utility

Assignee

• WELCH ALLYN, INC. · US

Inventors

• Raymond A. Lia · Skaneateles Falls, US
• Robert L. Vivenzio · Auburn, US
• Scott S. Stearns · Marietta, US
• Dominick Danna · Syracuse, US
• Timothy J. Smith · Auburn, US
• Allan I. Krauter · Skaneateles, US
• Edward Wright · Raleigh, US
• Edward Arthur Johnson · Skaneateles, US

Key dates

• Filing date: Nov 18, 1997
• Grant date: Oct 19, 1999
• Expiry date: Nov 18, 2017

Classification

• Technology area (CPC G): Physics
• CPC primary: G01L7/068
• WIPO field: Measurement
• WIPO sector: Instruments

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.