Occupant support with a migration sensitive bladder and method for migration detection

US10765225B2 · kind B2 · utility

Assignee

• Hill-Rom Services, Inc. · US

Inventors

• Christopher R. O'Keefe · Batesville, US
• Timothy J. Receveur · Guilford, US
• Aziz A. Bhai · Batesville, US
• Luke Gibson · Greensburg, US
• Charles A. Lachenbruch · Lakeway, US
• Rachel L. Williamson · Batesville, US

Key dates

• Filing date: May 17, 2017
• Grant date: Sep 8, 2020
• Expiry date: Jan 21, 2039

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04C2270/0421
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A method for detecting occupant position change on a support surface includes establishing a rate of change of pressure in a head end test zone and in a foot end test zone, comparing the head end rate to at least one head end rate limit, comparing the foot end rate to at least one foot end rate limit, and inferring, in response to the comparing steps, whether or not occupant migration has occurred. An associated occupant support includes a frame and a mattress. The mattress includes head and foot zones each having at least one pressurizable bladder. The support also includes a controller adapted to compare a head end rate of pressure change to a head end rate limit, to compare a foot end rate of pressure change to a foot end rate limit, and to infer, in response to the comparing steps, whether or not occupant migration has occurred.