Breathing assistance apparatus

Abstract

A patient interface that is comfortable for a user to wear is disclosed. The patient interface includes a forehead rest and cushion. In particular the cushion includes a deformable resilient member that when compressed creates a uniformly and gradually increasing force while evenly distributing the pressure on the forehead of the patient.

1 . (canceled) 
     
     
         2 . A device for delivering a supply of gases to a user comprising:
 a patient interface in fluid communication with a supply of gases; and   a deformable resilient member configured to engage with the patient interface and configured to rest against the face of a patient, the deformable resilient member including a contact portion and a body portion, wherein the body portion has a first end and an opposite second end, the first end coupled to the contact portion, and wherein the diameter of the second end is greater than the first end.   
     
     
         3 . The device of  claim 2 , wherein the body portion is a parabolic cone. 
     
     
         4 . The device of  claim 2 , wherein the contact portion of the deformable resilient member includes an opening. 
     
     
         5 . The device of  claim 4 , wherein the opening includes an edge that is configured to roll the deformable resilient member inwards when the contact portion of the deformable resilient member is compressed. 
     
     
         6 . The device of  claim 2 , wherein the contact portion is circular. 
     
     
         7 . The device of  claim 6 , wherein the contact portion has a curved perimeter, the curved perimeter is configured to roll down towards the body portion when a force is applied on the contact portion. 
     
     
         8 . The device of  claim 2 , wherein the contact portion is configured to adjust to the shape of the face of the patient. 
     
     
         9 . The device of  claim 2 , wherein the body portion is conical. 
     
     
         10 . The device of  claim 2 , wherein the deformable resilient member is composed of thermoplastic elastomer, silicone, or foam. 
     
     
         11 . The device of  claim 2 , wherein the deformable resilient member further includes a flange configured to engage with the patient interface to secure the deformable resilient member to the patient interface. 
     
     
         12 . The device of  claim 2 , wherein the deformable resilient member is glued to the patient interface. 
     
     
         13 . A device for delivering a supply of gases to a user comprising:
 a patient interface in fluid communication with a supply of gases; and   a deformable resilient member configured to engage with the patient interface and configured to rest against the face of a patient, the deformable resilient member including a contact portion and a body portion, wherein the contact portion has a circular cross-section.   
     
     
         14 . The device of  claim 13 , wherein the deformable resilient member is composed of thermoplastic elastomer, silicone, or foam. 
     
     
         15 . The device of  claim 13 , wherein the contact portion is hemispherical. 
     
     
         16 . The device of  claim 13 , wherein the body portion has a first portion and a second portion. 
     
     
         17 . The device of  claim 16 , wherein the second portion is a flange that is configured to be slotted into an aperture in the patient interface. 
     
     
         18 . The device of  claim 16 , wherein the first portion is circular. 
     
     
         19 . The device of  claim 13 , wherein the contact portion is suspended above the body portion. 
     
     
         20 . The device of  claim 19 , wherein at least one support is configured to secure the contact portion to the body portion. 
     
     
         21 . The device of  claim 13 , wherein two supports are configured to secure the contact portion to the body portion.