Cushion for a respiratory mask assembly

US7971590B2 · kind B2 · utility

Assignee

• RedMed Limited · AU

Inventors

• Robert Henry Frater · Chatswood, AU
• Joanne Elizabeth Drew · Fawn Drive, AU
• Philip Rodney Kwok · Chatswood, AU
• Patrick John McAuliffe · Parramatta, AU
• Aaron Samuel Davidson · Sydney, AU
• Robin Garth Hitchcock · Parramatta, AU
• Michael Kassipillai Gunaratnam · Chatswood, AU

Key dates

• Filing date: Jun 15, 2005
• Grant date: Jul 5, 2011
• Expiry date: Aug 10, 2028

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M16/0825
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A respiratory mask assembly for delivering breathable gas to a patient includes a frame and a cushion. The cushion has a non-face contacting portion structured to be connected to the frame, a face-contacting portion structured to engage the patient's face, and a central portion that interconnects the non-face contacting portion and the face contacting portion. The frame may be structured to allow a forehead support to assume multiple positions, to compensate for replacement cushions that may have a different profile, shape or size. The cushion is structured to compensate for variations in strap tension, treatment pressure and/or movement of the patient. Headgear may be provided with a strap assembly in which one or more straps is provided with selectively adjustable elasticity or extensibility that may be automatically changed in dependence of treatment pressure and/or treatment type.