|Publication number||US3468311 A|
|Publication date||23 Sep 1969|
|Filing date||7 Jun 1967|
|Priority date||7 Jun 1967|
|Publication number||US 3468311 A, US 3468311A, US-A-3468311, US3468311 A, US3468311A|
|Inventors||John P Gallagher|
|Original Assignee||John P Gallagher|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (5), Referenced by (64), Classifications (15)|
|External Links: USPTO, USPTO Assignment, Espacenet|
P 23, 1969 J. P. GALLAGHER 3,468,311
assonsmw PAD Filed June '7, 1967 ym m 26" 2 6 24" 24 INVENTOR JOHN P. GALLAGHER ATTORNEY? United States Patent 3,468,311 ABSORBENT PAD John P. Gallagher, 2415 Foxhall Road NW., Washington, D.C. 20007 Filed June 7, 1967, Ser. No. 644,345 Int. Cl. A611 15/00 US. Cl. 128-296 3 Claims ABSTRACT OF THE DISCLOSURE An absorbent pad comprising a pneumatic cellular cushion top layer, a liquid absorbent layer and a bottom liquid impervious layer.
This invention relates to an improved absorbent pad having particular utility in hospitals, convalescent homes and the like.
It is a principle object of the present invention to provide an absorbent pad comprising a plurality of discreet layers each having an independent function which functions cooperate to provide an absorbent pad that is very comfortable, highly absorbent, and will retain fluids between an upper cushion layer and a lower liquid impervious layer.
It is a further object of the present invention to provide such an absorbent pad wherein the cushion layer consists of air cells separated from each other by partition walls which partition walls are provided with a plurality of liquid permeable perforations to thereby provide an extremely comfortable cushion zone that will permit the passage of body fluids to a lower highly absorbent layer and the circulation of air to the patient sitting or reclining on the pad.
A further object is to provide such a structure wherein a liquid impervious layer is secured to or formed on the lower surface of the highly absorbent layer to prevent the passage of body fluids from the absorbent layer to a supporting structure.
A further object of the present invention is to provide such an absorbent pad which is relatively inexpensive to manufacture and which is disposable thereby eliminating the laundry problems heretofore associated with absorbent pads.
These and other objects and advantages are provided by an absorbent pad comprising a plurality of layers and including at least a pneumatic cellular layer, a liquid absorbent layer and a bottom liquid impervious layer, said pneumatic cellular layer comprising a pair of plastic sheets having a plurality of air cells extending between opposed surfaces thereof, a portion of the opposed surfaces of the sheets being sealed to each other to form partition walls between adjacent cells and a liquid permeable perforations extending through the sheets in the partition walls.
The invention will be more particularly described in reference to the accompanying drawings wherein:
FIGURE 1 is a top plan view of an absorbent pad constructed in accordance with the teachings of the present invention;
FIGURE 2 is a sectional view of the structure illustrated in FIGURE 1;
FIGURE 3 is a top plan view of a modified form of the present invention; and
FIGURE 4 is a view like a FIGURE 1 of a further form of the present invention.
Referring to the drawings, the improved absorbent pad 10 comprises at least three layers. The uppermost layer generally designated 12 comprises a pneumatic cellular cushion layer; 14 represents a bottom layer comprising a liquid impervious plastic sheet or the like; and 16 genice erally designates a highly absorbent layer sandwiched between the cushion layer and the liquid impervious layer. The topmost layer comprises a pair of plastic sheets 18 and 20 assembled to provide a plurality of air or other gaseous or fluid filled cells 22, which cells are spaced from each other by partition zones or walls 24 formed by sealing the opposed surfaces of the plastic sheets 18 and 20 together.
In general the cells 22 are uniformly spaced about the top layer 12 and provide the primary cushioning feature of the invention. Between the cells 22 and in the partition walls 24 are a plurality of perforations 26 which perforations are large enough to permit generally unrestricted flow of body fluids from the top surface 18 of the cushion layer 12 into the absorbent layer 16. Further, the number of the perforations 26 is such that uncontrolled bladder emptying of a human may readily pass through the perforations 26 to the absorbent layer 16 without flooding over the marginal side edges of the pad when the dimensions of the pad are approximately 24 by 36 inches.
The absorbent layer 16 may comprise substantially any of the highly absorbent natural or synthetic fibers, woven, non-woven or porous members. Very satisfactory results may have been provided by the use of mats or batts of synthetic fibers, mixtures of synthetic fibers, non-woven cellulosic batts or open cell sponge-like sheets. In a specific embodiment of the present invention the absorbent layer 16 comprising a batt of cotton linters or slivers which have been treated with a conventional wetting agent to assist in drawing body fluids from the exposed surface of the air cushion element 12 into the fibrous batts.
The absorbent layer may comprise a mat or mass of hydrophobic fibers wherein the liquid retaining function of the batt takes place along the large surface area of the fibers. Non-water wetting fibers such as Dacron and nylon have the characteristic property of being non-water absorbent from the standpoint that water generally does not penetrate the fibers, however, such fibers have the char- ,Iacteristic of permitting fluids to wick along their surface and in this manner a batt of such fibrous material will retain or hold a large quantity of liquid upon its large surface area when disposed in batt arrangement.
The lowermost layer of the composite pad preferably consists of a thin layer of water impervious plastic such as polyethylene, polypropylene and the like. The primary function of the layer 14 is to provide a barrier for body liquids contained in the liquid holding or storage zone 16.
In FIGURE 1 the air cells 22 are generally spheroidal in transverse section; however, the shape of the cells is not critical and the cells 20' and 20" may be diamond shaped as shown in FIGURE 3, or hexagonal as shown in FIGURE 4. The actual shape of the air cells should be such that the body of a person may be retained by the air cells in generally spaced relation to the partition zones 24, 24', 24" which contain the perforations 26, 26, etc. By supporting the body of the patient spaced from the partition walls 24, 24' insures rapid drainage of body fluids into the absorbent batt-like layer 16 and prevents wicking of fluids from the batt to the body of the patient.
From the foregoing description, it will be seen that the present invention fully accomplishes the aims and objects hereinbefore set forth. For example, the top surface 28 .of the pneumatic cellular cushion layer 12 may be covered with a soft woven or non-woven fabric-like material; short soft fibers or flocking, etc. to provide a comfort layer between the plastic and the patient. Further, it will be recognized that the plastic film or sheet 14 may be formed by spray coating the under surface of the batt or mat 16.
1. An absorbent pad comprising a plurality of layers and including at least a pneumatic cellular layer, a liquid absorbent and a bottom liquid impervious layer, said pneumatic cellular layer comprising a pair of plastic sheets having a plurality of air cells extending between opposed surfaces thereof, portions of the opposed surfaces of these sheets being sealed to each other to form partition walls between adjacent cells and liquid permeable perforations extending through the sheet in the 1 partition walls.
2. The invention defined in claim 1 wherein the liquid absorbent layer comprises a fibrous batt.
3. The invention defined in claim 2 wherein the liquid impervious layer comprises a sheet of polyethylene.
References Cited UNITED STATES PATENTS 0 CHARLES F. ROSENBAUM, Primary Examiner US. Cl. X.R.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US2269342 *||31 May 1938||6 Jan 1942||K & W Rubber Corp||Inflatable rubber goods|
|US3156242 *||29 Mar 1962||10 Nov 1964||Johnson & Johnson||Flexible absorbent sheet|
|US3308488 *||3 May 1965||14 Mar 1967||Schoonman Richard J||Bacteriostatic drawsheet|
|US3392081 *||9 Nov 1966||9 Jul 1968||Sealed Air Corp||Multi-laminate cushioning material|
|US3394415 *||6 Apr 1966||30 Jul 1968||Buster A. Parker||Pressure pad with independent cells|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3645264 *||5 Nov 1970||29 Feb 1972||John P Gallagher||Absorbent pad|
|US3674027 *||6 Aug 1969||4 Jul 1972||Raul Fleischmajer||Disposable wet compresses|
|US3908659 *||14 Mar 1974||30 Sep 1975||Procter & Gamble||Absorbent pad structure, diaper construction utilizing same and methods of manufacture thereof|
|US3935355 *||20 Dec 1972||27 Jan 1976||Hans Georg Kuhn||Wrapping material|
|US4041951 *||2 Mar 1976||16 Aug 1977||The Procter & Gamble Company||Absorptive structure having improved surface dryness and improved resistance to rewetting in-use|
|US4149541 *||6 Oct 1977||17 Apr 1979||Moore-Perk Corporation||Fluid circulating pad|
|US4610679 *||2 Oct 1985||9 Sep 1986||Masao Matsushita||Bedsore-free diaper|
|US4614000 *||19 Jun 1984||30 Sep 1986||Pacon Manufacturing Corp.||Patient undersheet for preventing bed sores|
|US4643727 *||7 Jan 1985||17 Feb 1987||Rosenbaum Richard J||Absorbant pad|
|US4662012 *||7 Dec 1983||5 May 1987||Torbet Philip A||Bed utilizing an air mattress|
|US4723953 *||18 Aug 1986||9 Feb 1988||Rocky Mountain Medical Corporation||Absorbent pad|
|US4772444 *||24 Aug 1987||20 Sep 1988||The Procter & Gamble Company||Method and apparatus for making microbubbled and/or microapertured polymeric webs using hydraulic pressure|
|US4778644 *||24 Aug 1987||18 Oct 1988||The Procter & Gamble Company||Method and apparatus for making substantially fluid-impervious microbubbled polymeric web using high pressure liquid stream|
|US4813944 *||5 Jan 1988||21 Mar 1989||Glen Kyle Haney||Multipurpose disposable absorbent pad|
|US4842594 *||3 Feb 1988||27 Jun 1989||Chicopee||Absorbent article with internal wicking means|
|US4844072 *||27 Dec 1985||4 Jul 1989||Seabrook Medical Systems, Inc.||Liquid-circulating thermal therapy system|
|US4846821 *||24 Aug 1987||11 Jul 1989||The Procter & Gamble Company||Substantially fluid-impervious microbubbled polymeric web exhibiting low levels of noise when subjected to movement|
|US4880419 *||14 Dec 1988||14 Nov 1989||Chicopee||Absorbent article with internal wicking means|
|US4954051 *||12 Jan 1989||4 Sep 1990||National Seating Company||Air spring seat and air pump|
|US4961982 *||15 Mar 1989||9 Oct 1990||Standard Textile Company, Inc.||Liquid-absorbing pad assembly and method of making same|
|US4982466 *||12 Oct 1988||8 Jan 1991||Leggett & Platt, Incorporated||Body support system|
|US5009318 *||9 Mar 1990||23 Apr 1991||Lepinoy Industrie||Method, device and padded product for maintaining an object|
|US5152023 *||13 Nov 1990||6 Oct 1992||Graebe Robert W||Cellular cushion having sealed cells|
|US5364339 *||7 Apr 1993||15 Nov 1994||Juanita Carver||Bed sore pad|
|US5461741 *||31 Oct 1994||31 Oct 1995||Graebe; Robert H.||Modular cushion construction with foamed base|
|US5462519 *||9 Nov 1994||31 Oct 1995||Carver; Juanita||Bed sore pad|
|US5636395 *||6 Feb 1995||10 Jun 1997||Serda; Jarrett F. M.||Mattress pad with gel filled chambers coupled to a foam cushion|
|US6183838 *||24 Mar 1997||6 Feb 2001||Sealed Air Corporation||Composite material having gas cavities and a mechanically bonded protective layer and method of making same|
|US6325786||11 Nov 1997||4 Dec 2001||Sca Hygiene Products Ab||Absorbent article having increased front portion stiffness|
|US6350257||11 Nov 1997||26 Feb 2002||Sca Hygiene Products Ab||Absorbent article with high stiffness|
|US6425890 *||11 Nov 1997||30 Jul 2002||Sca Hygiene Products Ab||Absorbent article with a raised portion|
|US6503233||2 Oct 1998||7 Jan 2003||Kimberly-Clark Worldwide, Inc.||Absorbent article having good body fit under dynamic conditions|
|US6524291||11 Nov 1997||25 Feb 2003||Sca Hygiene Products Ab||Absorbent article such as a sanitary napkin, an incontinence guard, a panty-liner or the like|
|US6562192||12 Apr 2000||13 May 2003||Kimberly-Clark Worldwide, Inc.||Absorbent articles with absorbent free-flowing particles and methods for producing the same|
|US6610902||11 Nov 1997||26 Aug 2003||Sca Hygiene Products Ab||Absorbent structure for use in an absorbent article|
|US6667424||12 Apr 2000||23 Dec 2003||Kimberly-Clark Worldwide, Inc.||Absorbent articles with nits and free-flowing particles|
|US6673982||2 Oct 1998||6 Jan 2004||Kimberly-Clark Worldwide, Inc.||Absorbent article with center fill performance|
|US6695827||27 Nov 2002||24 Feb 2004||Kimberly-Clark Worldwide, Inc.||Absorbent article having good body fit under dynamic conditions|
|US6803334 *||27 Aug 2001||12 Oct 2004||Uni-Charm Corporation||Absorbent article having fibrous layer on surface|
|US6892734 *||19 Oct 2000||17 May 2005||Thomas R. Schleicher||Wound care suspension system|
|US6901617||29 Apr 2003||7 Jun 2005||Roho, Inc.||Multi-layer cushion and cover|
|US7000616 *||1 Dec 2003||21 Feb 2006||Diaz R Gary||Wound care suspension system|
|US7024714||21 Apr 2005||11 Apr 2006||Yates Paul M||Celled seat cushion|
|US7265258||12 Sep 2003||4 Sep 2007||Kimberly-Clark Worldwide, Inc.||Absorbent articles with nits and free-flowing particles|
|US7416627||31 Aug 2005||26 Aug 2008||Kimberly-Clark Worldwide, Inc.||Films and film laminates having cushioning cells and processes of making thereof|
|US7429689||15 Sep 2003||30 Sep 2008||Kimberly-Clark Worldwide, Inc.||Absorbent article with center fill performance|
|US7632979 *||29 Sep 2003||15 Dec 2009||Daio Paper Corporation||Absorbing article having honeycomb recesses on lower absorbent layer and varying layer densities|
|US7695069||18 Jul 2007||13 Apr 2010||Prust Peter C||Seat cushion|
|US7812213 *||28 Dec 2004||12 Oct 2010||Sca Hygiene Products Ab||Absorbent article with through-slits surrounded by binding areas|
|US8151654||3 Oct 2006||10 Apr 2012||Methode Electronics, Inc.||Sensor pad for controlling airbag deployment and associated support|
|US8241262 *||23 Sep 2009||14 Aug 2012||Michael Mahnensmith||Fluid collection and aspiration unit for management of urinary incontinence|
|US8668977||29 Aug 2007||11 Mar 2014||Polymer Concepts, Inc.||Support structures and methods|
|US20040116884 *||29 Sep 2003||17 Jun 2004||Takako Fujii||Body fluid absorbing article|
|US20040147863 *||1 Dec 2003||29 Jul 2004||Diaz R. Gary||Wound care suspension system|
|US20050009425 *||24 Jun 2004||13 Jan 2005||Foote Frederick C.||Disposable absorbent mat|
|US20050017565 *||22 Jul 2004||27 Jan 2005||Sprouse Anthony Eric||Office chair with inflatable cellular insert|
|US20050148983 *||28 Dec 2004||7 Jul 2005||Sca Hygiene Products Ab||Absorbent article and method for manufacturing such article|
|US20050151410 *||18 Feb 2005||14 Jul 2005||Sprouse Anthony E.Ii||Chair with inflatable cellular insert|
|US20050217030 *||5 Apr 2005||6 Oct 2005||Donald Seigler||Mattress sheet and system incorporating the same|
|EP0788324A1 *||24 Oct 1995||13 Aug 1997||Crown Therapeutics, Inc.||Vacuum/heat formed cushion|
|WO1986003964A1 *||2 Jan 1986||17 Jul 1986||Rocky Mountain Medical Corp||Absorbant pad|
|WO1990003750A1 *||11 Oct 1989||19 Apr 1990||Leggett & Platt||Body support system|
|WO1996012426A1 *||24 Oct 1995||2 May 1996||Crown Therapeutics Inc||Vacuum/heat formed cushion|
|WO2005060888A1 *||1 Dec 2004||7 Jul 2005||Gary R Diaz||Wound care suspension system|
|U.S. Classification||604/370, 604/377, 5/724, 428/166, 604/383, 428/178, 604/369, 5/484, 428/137, 428/131|
|International Classification||A61F13/15, A61F5/44|
|Cooperative Classification||A61F2013/51492, A61F5/4401|