Air mattress with firmness adjusting air bladders

• US 6,047,423 A
• Filed: 07/27/1998
• Issued: 04/11/2000
• Est. Priority Date: 07/27/1998
• Status: Expired due to Fees

• Current Assignee: Lynn D. Larson
• Original Assignee: Lynn D. Larson
• Inventors: Larson, Lynn D.
• Primary Examiner(s): Melius, Terry Lee
• Assistant Examiner(s): Hewitt, James M
• Application Number:
  US09/122,943
• Time in Patent Office: 624 Days
• Field of Search: 5/706, 5/709, 5/710, 5/713, 5/719, 5/654
• US Class Current: 5/709
• CPC Class Codes: A47C 27/082 with non-manual inflation, e.g. with electric pumps
• CPC Class Codes: A47C 27/088 incorporating elastic bodies, e.g. foam
• CPC Class Codes: A47C 27/10 with two or more independently-fillable chambers

Abstract

A fluid-filled mattress with firmness adjusting air bladders is provided wherein the individual bladders may be individually inflated and deflated to provide precise firmness adjustment. Further, a computer control of the bladders may be utilized to adjust the firmness of the air bladders.

Claims

1. A fluid-filled mattress with auxiliary support, comprising:

a fluid-filled mattress having upper and lower walls, opposing side walls and opposing end walls, forming an enclosed chamber;

an operable pump fluidly connected to said chamber to selectively pump fluid into said chamber;

a first bladder disposed within said chamber and extending substantially from said lower wall to the said upper wall; and

a block of resilient compressible material which returns to an expanded condition mounted within said first bladder;

said first bladder filled with compressible fluid to a predetermined pressure, to provide auxiliary support for an object resting on said upper wall of the mattress above said first bladder;

said first bladder including a one-way check valve provided therein permitting fluid flow into said first bladder and preventing fluid flow out of said first bladder.

2. A fluid-filled mattress with auxiliary support, comprising:

a fluid-filled mattress having upper and lower walls, opposing side walls and opposing end walls, forming an enclosed chamber;

an operable pump fluidly connected to said chamber to selectively pump fluid into said chamber;

a first bladder disposed within said chamber and extending substantially from said lower wall to the upper wall; and

a block of resilient compressible material which returns to an expanded condition mounted within said first bladder;

said first bladder filled with compressible fluid to a predetermined pressure, to provide auxiliary support for an object resting on said upper wall of the mattress above said first bladder;

said compressible fluid in said first bladder being a gas;

said fluid filling said mattress being a gas;

said block of resilient compressible material being a fibrous batt;

said first bladder including a one-way check valve provided therein permitting fluid flow into said first bladder and preventing fluid flow out of said first bladder;

said mattress further comprising a second gas-filled bladder disposed within said chamber and extending substantially from said lower wall to said upper wall;

a block of resilient compressible material which returns to an expanded condition mounted within said second bladder;

said second bladder filled with compressible fluid to a predetermined pressure;

said second bladder being fluidly connected to said first bladder, such that both bladders have equal pressures;

said pump being fluidly connected to said first bladder, and further comprising an operable valve in said second bladder for selectively exhausting fluid from said second bladder into said mattress.

3. A fluid-filled mattress with auxiliary support, comprising:

a fluid-filled mattress having upper and lower walls, opposing side walls and opposing end walls, forming an enclosed chamber;

an operable pump fluidly connected to said chamber to selectively pump fluid into said chamber;

a first bladder disposed within said chamber and extending substantially from said lower wall to said upper wall thereof; and

a block of resilient compressible material which returns to an expanded condition mounted within said first bladder;

said first bladder filled with compressible fluid to a predetermined pressure, to provide auxiliary support for an object resting on said upper wall of said mattress above said first bladder;

said compressible fluid in said first bladder being a gas;

said fluid filling said mattress being a gas;

said block of resilient compressible material being a fibrous batt;

said first bladder including a one-way check valve provided therein permitting fluid flow into said first bladder and preventing fluid flow out of said first bladder.

4. The mattress of claim 3 wherein said mattress includes an operable mattress valve formed therein, operable to selectively exhaust fluid from the mattress.

5. The mattress of claim 4 further comprising a programmable control unit electrically connected to the pump and the mattress valve, for selectively adjusting the pressure within the mattress.

6. The mattress of claim 5, further comprising:

a second gas-filled bladder disposed within the chamber and extending substantially from the lower to the upper wall;

a block of resilient compressible material which returns to an expanded condition, mounted within the second bladder; and

the second bladder filled with compressible fluid, to a predetermined pressure.

7. The mattress of claim 6 wherein the second bladder is fluidly connected to the first bladder, such that both bladders have equal pressures.

8. The mattress of claim 7 further comprising an operable valve in said second bladder for selectively exhausting fluid from said second bladder into the mattress, and wherein said pump is fluidly connected to the mattress by way of said first bladder, said second bladder, and said operable valve.