Self-inflating mattress

Abstract

A self-inflating mattress has a hollow body, an inflating valve, a deflating valve, a unidirectional valve and a foam material. The body has at least two chambers respectively serving as a primary chamber with a supporting chamber and a secondary chamber. The inflating and deflating valves are mounted on the body and communicate respectively with the primary and secondary chambers. The unidirectional valve is mounted on the supporting chamber, communicates with the supporting and secondary chambers and only allows air to flow from the primary chamber to the secondary chamber when open. The foam material is mounted in the primary chamber. The operation of the inflation/deflation of the primary and secondary chambers is implemented without an air pump and is convenient. Furthermore, the supporting chamber provides convenience for tightly fitting of the unidirectional valve without any leakage.

1 . A self-inflating mattress comprising: 
 a hollow body made of soft material and having at least two chambers serving respectively as a primary chamber and a secondary chamber, the primary chamber having a supporting chamber communicating with the primary chamber, and the secondary chamber covering the supporting chamber;    an inflating valve mounted on the body and communicating with the primary chamber;    a deflating valve mounted on the body and communicating with the secondary chamber;    a unidirectional valve mounted on the supporting chamber, communicating with the supporting and secondary chambers, only allowing air to flow from the primary chamber to the secondary chamber when open; and    a foam material being resilient and mounted in the primary chamber.    
   
   
       2 . The self-inflating mattress as claimed in  claim 1 , wherein the unidirectional valve has 
 a base mounted between the supporting and secondary chambers and having 
 a cavity; and  
 at least one opening communicating with the primary chamber and the cavity;  
   a cover mounted on the base and having at least one opening communicating with the secondary chamber and the cavity;    a sealing slide mounted slidably in the cavity and selectively closing the at least one opening; and    a spring mounted between the sealing slide and the cover and biasing the sealing slide to close the at least one opening in the base.    
   
   
       3 . The self-inflating mattress as claimed in  claim 2 , wherein the unidirectional valve further has an O-ring mounted in the cavity and the sealing slide selectively closes the at least one opening by contacting the O-ring in the base.  
   
   
       4 . The self-inflating mattress as claimed in  claim 1 , wherein the inflating valve has 
 a base having a central opening communicating with the primary chamber; and    a knob screwed on the base, selectively closing the central opening and having an inner surface and multiple openings communicating with the ambient environment and the central opening.    
   
   
       5 . The self-inflating mattress as claimed in  claim 4 , wherein: 
 the base of the inflating valve further has an O-ring mounted on the base; and    the knob of the inflating valve selectively closes the central opening by hermetically contacting the inner surface with the O-ring.    
   
   
       6 . The self-inflating mattress as claimed in  claim 1 , wherein the deflating valve has 
 a base having a central opening communicating with the secondary chamber; and    a knob screwed on the base, selectively closing the central opening and having an inner surface and multiple openings communicating with the ambient environment and the central opening.    
   
   
       7 . The self-inflating mattress as claimed in  claim 6 , wherein: 
 the base of the deflating valve further has an O-ring mounted on the base; and    the knob of the deflating valve selectively closes the central opening by hermetically contacting the inner surface with the O-ring.    
   
   
       8 . The self-inflating mattress as claimed in  claim 1 , wherein: 
 the secondary chamber has an inner surface; and    the supporting chamber has an outer surface partially formed integrally with the inner surface of the secondary chamber.    
   
   
       9 . The self-inflating mattress as claimed in  claim 1 , wherein: 
 the secondary chamber has an inner surface; and    the supporting chamber has an outer surface extending in the secondary chamber and separating apart from the inner surface of the secondary chamber.    
   
   
       10 . A self-inflating mattress comprising: 
 a hollow body made of soft material and having at least two chambers serving respectively as a primary chamber and a secondary chamber, the secondary chamber having a supporting chamber communicating with the secondary chamber, and the primary chamber covering the supporting chamber;    an inflating valve mounted on the body and communicating with the primary chamber;    a deflating valve mounted on the body and communicating with the secondary chamber;    a unidirectional valve mounted on the supporting chamber, communicating with the supporting and primary chambers, only allowing air to flow from the primary chamber to the secondary chamber when open; and    a foam material being resilient and mounted in the primary chamber.    
   
   
       11 . The self-inflating mattress as claimed in  claim 10 , wherein the unidirectional valve has 
 a base mounted between the primary and supporting chambers and having 
 a cavity; and  
 at least one opening communicating with the primary chamber and the cavity;  
   a cover mounted on the base and having at least one opening communicating with the supporting chamber and the cavity;    a sealing slide mounted slidably in the cavity and selectively closing the at least one opening; and    a spring mounted between the sealing slide and the cover and biasing the sealing slide to close the at least one opening in the base.    
   
   
       12 . The self-inflating mattress as claimed in  claim 11 , wherein the unidirectional valve further has an O-ring mounted in the cavity and the sealing slide selectively closes the at least one opening by contacting the O-ring in the base.  
   
   
       13 . The self-inflating mattress as claimed in  claim 10 , wherein the inflating valve has 
 a base having a central opening communicating with the primary chamber; and    a knob screwed on the base, selectively closing the central opening and having an inner surface and multiple openings communicating with the ambient environment and the central opening.    
   
   
       14 . The self-inflating mattress as claimed in  claim 13 , wherein: 
 the base of the inflating valve further has an O-ring mounted on the base; and    the knob selectively closes the central opening by hermetically contacting the inner surface with the O-ring.    
   
   
       15 . The self-inflating mattress as claimed in  claim 10 , wherein the deflating valve has 
 a base having a central opening communicating with the supporting chamber; and    a knob screwed on the base, selectively closing the central opening and having an inner surface and multiple openings communicating with the ambient environment and the central opening.    
   
   
       16 . The self-inflating mattress as claimed in  claim 15 , wherein: 
 the base of the deflating valve further has an O-ring mounted on the base; and    the knob selectively closes the central opening by hermetically contacting the inner surface with the O-ring.    
   
   
       17 . The self-inflating mattress as claimed in  claim 10 , wherein: 
 the primary chamber has an inner surface; and    the supporting chamber has an outer surface partially formed integrally with the inner surface of the primary chamber.    
   
   
       18 . The self-inflating mattress as claimed in  claim 10 , wherein: 
 the primary chamber has an inner surface; and    the supporting chamber has an outer surface extending in the primary chamber and separating apart from the inner surface of the primary chamber.