Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3468311 A
Publication typeGrant
Publication date23 Sep 1969
Filing date7 Jun 1967
Priority date7 Jun 1967
Publication numberUS 3468311 A, US 3468311A, US-A-3468311, US3468311 A, US3468311A
InventorsJohn P Gallagher
Original AssigneeJohn P Gallagher
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Absorbent pad
US 3468311 A
Images(1)
Previous page
Next page
Description  (OCR text may contain errors)

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.

I claim:

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.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2269342 *31 May 19386 Jan 1942K & W Rubber CorpInflatable rubber goods
US3156242 *29 Mar 196210 Nov 1964Johnson & JohnsonFlexible absorbent sheet
US3308488 *3 May 196514 Mar 1967Schoonman Richard JBacteriostatic drawsheet
US3392081 *9 Nov 19669 Jul 1968Sealed Air CorpMulti-laminate cushioning material
US3394415 *6 Apr 196630 Jul 1968Buster A. ParkerPressure pad with independent cells
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3645264 *5 Nov 197029 Feb 1972John P GallagherAbsorbent pad
US3674027 *6 Aug 19694 Jul 1972Raul FleischmajerDisposable wet compresses
US3908659 *14 Mar 197430 Sep 1975Procter & GambleAbsorbent pad structure, diaper construction utilizing same and methods of manufacture thereof
US3935355 *20 Dec 197227 Jan 1976Hans Georg KuhnWrapping material
US4041951 *2 Mar 197616 Aug 1977The Procter & Gamble CompanyAbsorptive structure having improved surface dryness and improved resistance to rewetting in-use
US4149541 *6 Oct 197717 Apr 1979Moore-Perk CorporationFluid circulating pad
US4610679 *2 Oct 19859 Sep 1986Masao MatsushitaBedsore-free diaper
US4614000 *19 Jun 198430 Sep 1986Pacon Manufacturing Corp.Patient undersheet for preventing bed sores
US4643727 *7 Jan 198517 Feb 1987Rosenbaum Richard JAbsorbant pad
US4662012 *7 Dec 19835 May 1987Torbet Philip ABed utilizing an air mattress
US4723953 *18 Aug 19869 Feb 1988Rocky Mountain Medical CorporationAbsorbent pad
US4772444 *24 Aug 198720 Sep 1988The Procter & Gamble CompanyMethod and apparatus for making microbubbled and/or microapertured polymeric webs using hydraulic pressure
US4778644 *24 Aug 198718 Oct 1988The Procter & Gamble CompanyMethod and apparatus for making substantially fluid-impervious microbubbled polymeric web using high pressure liquid stream
US4813944 *5 Jan 198821 Mar 1989Glen Kyle HaneyMultipurpose disposable absorbent pad
US4842594 *3 Feb 198827 Jun 1989ChicopeeAbsorbent article with internal wicking means
US4844072 *27 Dec 19854 Jul 1989Seabrook Medical Systems, Inc.Liquid-circulating thermal therapy system
US4846821 *24 Aug 198711 Jul 1989The Procter & Gamble CompanySubstantially fluid-impervious microbubbled polymeric web exhibiting low levels of noise when subjected to movement
US4880419 *14 Dec 198814 Nov 1989ChicopeeAbsorbent article with internal wicking means
US4954051 *12 Jan 19894 Sep 1990National Seating CompanyAir spring seat and air pump
US4961982 *15 Mar 19899 Oct 1990Standard Textile Company, Inc.Liquid-absorbing pad assembly and method of making same
US4982466 *12 Oct 19888 Jan 1991Leggett & Platt, IncorporatedBody support system
US5009318 *9 Mar 199023 Apr 1991Lepinoy IndustrieMethod, device and padded product for maintaining an object
US5152023 *13 Nov 19906 Oct 1992Graebe Robert WCellular cushion having sealed cells
US5364339 *7 Apr 199315 Nov 1994Juanita CarverBed sore pad
US5461741 *31 Oct 199431 Oct 1995Graebe; Robert H.Modular cushion construction with foamed base
US5462519 *9 Nov 199431 Oct 1995Carver; JuanitaBed sore pad
US5636395 *6 Feb 199510 Jun 1997Serda; Jarrett F. M.Mattress pad with gel filled chambers coupled to a foam cushion
US6183838 *24 Mar 19976 Feb 2001Sealed Air CorporationComposite material having gas cavities and a mechanically bonded protective layer and method of making same
US632578611 Nov 19974 Dec 2001Sca Hygiene Products AbAbsorbent article having increased front portion stiffness
US635025711 Nov 199726 Feb 2002Sca Hygiene Products AbAbsorbent article with high stiffness
US6425890 *11 Nov 199730 Jul 2002Sca Hygiene Products AbAbsorbent article with a raised portion
US65032332 Oct 19987 Jan 2003Kimberly-Clark Worldwide, Inc.Absorbent article having good body fit under dynamic conditions
US652429111 Nov 199725 Feb 2003Sca Hygiene Products AbAbsorbent article such as a sanitary napkin, an incontinence guard, a panty-liner or the like
US656219212 Apr 200013 May 2003Kimberly-Clark Worldwide, Inc.Absorbent articles with absorbent free-flowing particles and methods for producing the same
US661090211 Nov 199726 Aug 2003Sca Hygiene Products AbAbsorbent structure for use in an absorbent article
US666742412 Apr 200023 Dec 2003Kimberly-Clark Worldwide, Inc.Absorbent articles with nits and free-flowing particles
US66739822 Oct 19986 Jan 2004Kimberly-Clark Worldwide, Inc.Absorbent article with center fill performance
US669582727 Nov 200224 Feb 2004Kimberly-Clark Worldwide, Inc.Absorbent article having good body fit under dynamic conditions
US6803334 *27 Aug 200112 Oct 2004Uni-Charm CorporationAbsorbent article having fibrous layer on surface
US6892734 *19 Oct 200017 May 2005Thomas R. SchleicherWound care suspension system
US690161729 Apr 20037 Jun 2005Roho, Inc.Multi-layer cushion and cover
US7000616 *1 Dec 200321 Feb 2006Diaz R GaryWound care suspension system
US702471421 Apr 200511 Apr 2006Yates Paul MCelled seat cushion
US726525812 Sep 20034 Sep 2007Kimberly-Clark Worldwide, Inc.Absorbent articles with nits and free-flowing particles
US741662731 Aug 200526 Aug 2008Kimberly-Clark Worldwide, Inc.Films and film laminates having cushioning cells and processes of making thereof
US742968915 Sep 200330 Sep 2008Kimberly-Clark Worldwide, Inc.Absorbent article with center fill performance
US7632979 *29 Sep 200315 Dec 2009Daio Paper CorporationAbsorbing article having honeycomb recesses on lower absorbent layer and varying layer densities
US769506918 Jul 200713 Apr 2010Prust Peter CSeat cushion
US7812213 *28 Dec 200412 Oct 2010Sca Hygiene Products AbAbsorbent article with through-slits surrounded by binding areas
US81516543 Oct 200610 Apr 2012Methode Electronics, Inc.Sensor pad for controlling airbag deployment and associated support
US8241262 *23 Sep 200914 Aug 2012Michael MahnensmithFluid collection and aspiration unit for management of urinary incontinence
EP0788324A1 *24 Oct 199513 Aug 1997Crown Therapeutics, Inc.Vacuum/heat formed cushion
WO1986003964A1 *2 Jan 198617 Jul 1986Rocky Mountain Medical CorpAbsorbant pad
WO1990003750A1 *11 Oct 198919 Apr 1990Leggett & PlattBody support system
WO1996012426A1 *24 Oct 19952 May 1996Crown Therapeutics IncVacuum/heat formed cushion
WO2005060888A1 *1 Dec 20047 Jul 2005Gary R DiazWound care suspension system
Classifications
U.S. Classification604/370, 604/377, 5/724, 428/166, 604/383, 428/178, 604/369, 5/484, 428/137, 428/131
International ClassificationA61F13/15, A61F5/44
Cooperative ClassificationA61F2013/51492, A61F5/4401
European ClassificationA61F5/44B