Seating apparatus with adjustable cushioning

Abstract

A seating apparatus with adjustable cushioning, comprises a seat base and an inflatable bladder comprising a plurality of air cells. The inflatable bladder is positioned in between at least two polyurethane foam layers, supported on the seat base. The seating apparatus further comprises a pump unit operatively connected to the inflatable bladder via a conduit for inflating or deflating the plurality of air cells for providing adjustable firmness to the seating apparatus.

Claims

1. A seating apparatus with adjustable cushioning, comprising: a seat base; an inflatable bladder comprising a plurality of air cells, wherein the inflatable bladder is positioned in between at least two polyurethane foam layers supported on the seat base; and a pump unit operatively connected to the inflatable bladder via a conduit, wherein the pump unit is configured to inflate or deflate the plurality of air cells, thereby compressing or decompressing, respectively, the at least two polyurethane foam layers provide adjustable firmness to the seating apparatus, wherein the pump unit further comprises a safety valve configured to release excessive pressure beyond a preset level.

2. The apparatus of claim 1, wherein the plurality of air cells are channeled, baffled or tufted to control compression of the at least two polyurethane foam layers.

3. The apparatus of claim 1, further comprises at least one fiber layer covering the at least two polyurethane foam layers.

4. The apparatus of claim 1, wherein the inflatable bladder is positioned within a back rest portion of the seating apparatus.

5. The apparatus of claim 1, wherein the pump unit comprises an electric pump, a hand pump or a bulb and valve assembly.

6. A seating apparatus with adjustable cushioning, comprising: a seat base; an inflatable bladder comprising a plurality of air cells, wherein the inflatable bladder is positioned in between at least two polyurethane foam layers supported on the seat base; and a pump unit operatively connected to the inflatable bladder via a conduit, wherein the pump unit is configured to inflate or deflate the plurality of air cells, thereby compressing or decompressing, respectively, the at least two polyurethane foam layers provide adjustable firmness to the seating apparatus.

7. The apparatus of claim 6, wherein the plurality of air cells are channeled, baffled or tufted to control compression of the at least two polyurethane foam layers.

8. The apparatus of claim 6, further comprising a regulatory valve that regulates the firmness.

9. The apparatus of claim 8, wherein the pump unit further comprises a safety valve configured to release excessive pressure beyond a preset level.

10. The apparatus of claim 6, wherein the seating apparatus is a cushion.

11. The apparatus of claim 10, wherein the cushion is made by inserting the inflatable bladder between the at least two polyurethane foam layers, the at least two polyurethane foam layers being made by splitting a polyurethane foam piece horizontally into two even pieces, the inflatable bladder and the two even pieces being glued together after the inflatable bladder is inserted.

12. The apparatus of claim 11, further comprising connecting one end of a tube or conduit to the inflatable bladder and the second end to the pump unit.

13. The apparatus of claim 11, wherein the cushion further comprises a cushion.

14. The apparatus of claim 13, wherein the cushion is a chair or a sofa cushion.

15. The apparatus of claim 14, wherein the cushion is a sofa cushion.

16. The apparatus of claim 10, wherein the air cells are baffled or channeled.

17. The apparatus of claim 10, wherein the cushion comprises a cushion casing and the at least two polyurethane foam layers are adjacent to the cushion casing.

18. The apparatus of claim 10, wherein the at least two polyurethane foam layers comprise outer fiber layers covering the at least two polyurethane foam layers.

19. The apparatus of claim 6, wherein the seating apparatus is made by inserting the inflatable bladder between the at least two polyurethane foam layers, the at least two polyurethane foam layers being made by splitting a polyurethane foam piece horizontally into two even pieces, the two even pieces being glued together after the inflatable bladder is inserted.

20. The apparatus of claim 19, further comprising connecting one end of a tube or conduit to the inflatable bladder and the second end to the pump unit.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 illustrates an arrangement of layers of the seating apparatus according to an embodiment of the present invention.

(2) FIG. 2 is a perspective view of the inflatable bladder according to an embodiment of the present invention.

(3) FIG. 3 is a cross sectional view of the seating apparatus in an inflated position according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

(4) The following detailed description of the preferred embodiments presents a description of certain specific embodiments to assist in understanding the claims. However, the present invention is intended to cover alternatives, modifications and equivalents, which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be evident to one of ordinary skill in the art that the present invention may be practiced without these specific details.

(5) Referring to FIG. 1, which shows an arrangement of different layers of the seating apparatus according to an embodiment of the present invention. The seating apparatus 100 comprises a seat base 105 and an inflatable bladder 106 comprising a plurality of air cells, positioned in between two polyurethane foam layers 102, 104, which are supported on the seat base 105. The apparatus 100 further comprises a pump unit 108 operatively connected to the inflatable bladder 106 via a conduit 110, wherein the pump unit 108 is configured to inflate or deflate the air cells for providing adjustable firmness to a seating apparatus 100.

(6) In an exemplary embodiment, a user can adjust the firmness level of the seating apparatus by using the pump unit to inflate or deflate the plurality of air cells distributed in the inflatable bladder. The pump unit 108 comprises a valve, which can be operable to release excess amount of air or pressure from the air cells. Thus, the user can control the amount of air flow to and from the inflatable bladder 106.

(7) FIG. 2 illustrates a perspective view of the inflatable bladder according to an embodiment of the present invention. The inflatable bladder 106 comprises a plurality of air cells, which are operatively connected to the pump device 108 via the conduit 110 for receiving air supply from the pump device 108 during inflation. In an embodiment, the inflatable bladder 106 comprises a plurality of cushion support rods extending longitudinally, the support rods are made of resilient material and arranged inside a covering.

(8) The pump device 108 further comprises a safety valve for releasing excessive pressure beyond a preset pressure limit. The safety valve aids in preventing the breakage of air cells due to excess pressure. In an embodiment, the pump device 108 contains a regulatory valve for controlling the air supply.

(9) In an embodiment, the air cells are baffled or channeled or tufted, which can be adjusted for providing extra push in desired areas of seating. The pump device 108 may comprise an electric pump, a hand pump or a bulb and valve unit, which can be secured in a compartment or a pouch, fastened using a zipper or Velcro or similar fastening means. The compartment can be strategically placed in such a way that it did not affect the aesthetic quality of the seating apparatus.

(10) The air cells can be manufactured from materials selected from urethane, PVC (polyvinyl chloride), plastic, rubber or resilient fabrics. The air cells can be inflated in a controlled manner utilizing multiple valves and pump units.

(11) FIG. 3 is a cross sectional view of the seating apparatus in an inflated position according to an embodiment of the present invention. The seating apparatus 100 comprises inflatable bladder 106 sandwiched between polyurethane foam layers 102 and 104. The inflatable bladder 106 comprise air cells which are baffled in order to control foam compression and even distribution of force to foam during expansion. As the inflatable bladder 106 expands, it compresses the polyurethane on both sides against the cushion casing and as the polyurethane compresses, it becomes firmer and firmer, directly proportional to how much it is compressed. The apparatus 100 may also comprise outer fiber layers 112, 114 covering the polyurethane foam layers 102, 104.

(12) The present invention utilizes all of the polyurethane foam seat construction. In an exemplary embodiment, the foam is split horizontally into two even pieces half the thickness of the original core. The bladder is then positioned between the two halves and glued together encompassing the bladder in the center of the core. A tube or conduit with one end connected to the bladder and exit the polyurethane core at one corner and other end connected to the pump unit, where it can be accessed from an open end of a zippered compartment. This method still utilizes all of the desirable characteristics of the polyurethane foam which has made it the primary choice for comfortable seating.

(13) Once inserted into a finished seat, the bladder may be expanded by use of air, liquid, or gas to compress the polyurethane foam against the fabric cover to provide additional support on the seating surface. The pump device is used to supply the flow of air, liquid, or gas from an exterior source through the conduit inserted into the inflatable bladder. This will cause the bladder to expand which in turn compress the polyurethane foam, yielding a firmer seat. The more the bladder expands, the firmer the seat becomes. For example, the bladder can be selectively deflated in order to achieve a softer seating.

(14) In an embodiment, the inflatable bladder can be positioned between the seat base and one or more polyurethane foam layer, in order to form a firmer sear construction. In this case, the tube can be threaded through a crevice between the seat and the back. The inflatable bladder can also be positioned in a back rest portion of the seating apparatus.

(15) The cushioning properties of seating apparatus can be user controlled or installer controlled or preset at factory during manufacturing. The seating apparatus of the present invention can be used in any upholstered furniture such as chairs, vehicle seats, recliners, sofas and stools.

(16) In addition, seats provided with cushioning adjustable based on desired level of user comfort and taste, allows a single seating arrangement to offer customized seating comfort for different individuals.