WO1997017870A1 - Cellular air loss mattress system - Google Patents
Cellular air loss mattress system Download PDFInfo
- Publication number
- WO1997017870A1 WO1997017870A1 PCT/US1996/018432 US9618432W WO9717870A1 WO 1997017870 A1 WO1997017870 A1 WO 1997017870A1 US 9618432 W US9618432 W US 9618432W WO 9717870 A1 WO9717870 A1 WO 9717870A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- air
- gussets
- gusset
- ofthe
- mattress system
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/05—Parts, details or accessories of beds
- A61G7/057—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor
- A61G7/05769—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor with inflatable chambers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/05—Parts, details or accessories of beds
- A61G7/057—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor
- A61G7/05784—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor with ventilating means, e.g. mattress or cushion with ventilating holes or ventilators
- A61G7/05792—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor with ventilating means, e.g. mattress or cushion with ventilating holes or ventilators with low air loss function, e.g. in mattresses, overlays or beds
Definitions
- the present invention relates to a therapeutic air bed such as utilized in hospitals and other convalescent facilities to provide support for patients during long periods of convalescence.
- Therapeutic air beds were developed in general to accommodate patients who are likely to be bedridden for extended periods of time or likely to be immobile for extended periods and patients who have particular skin problems such as burns.
- the material from which the upper portion of the air beds is composed tends to form about the patient's body to a certain extent, thereby evenly distributing the weight of the patient to the supporting surface of the air bed. This feature minimizes the likelihood that any particular portion of the patient's body will be subjected to sufficient mechanical pressure that blood flow to skin tissues will be impeded.
- Therapeutic air beds therefore, minimize the possibility that patients will develop pressure induced lesions.
- Another important aspect of therapeutic air beds is that many of them provide for circulation of air from the air cells upwardly to the patient support structure of the air bed and also to the patient.
- This gentle upward flow of air is typically emitted from a plurality of holes along the upper surface ofthe air cells or through perforations formed when the material ofthe air cells is sewn or through porous material of the air cells themselves.
- This flowing air is effective to remove moisture from the material ofthe air bed so that the therapeutic value ofthe air bed will not be impeded by moisture.
- It is desirable to provide an air bed construction of simple and efficient nature which is capable of continuously emitting a gentle upward flow of air through the material ofthe patient support system to therefore provide for patient comfort and to enhance the therapeutic aspects ofthe air bed construction.
- FIG. 1 A is a partially exploded perspective view of an alternate embodiment of a cellular air loss mattress system ofthe present invention
- FIG. 2 is an exploded perspective view of the embodiment of FIG. IA;
- FIG. 5 is a plan view of a baffle ofthe present invention.
- FIG. 6 is a plan view of a head gusset ofthe present invention
- FIG. 7 is a plan view of the head gusset of FIG. 6 with a flange in place;
- FIG. 8 is a plan view of a chest gusset ofthe present invention.
- FIG. 14 is a plan view of a heel gusset of the present invention.
- FIG. 15 is a side view partially in cross section of a manifold ofthe present invention.
- FIG. 15A is an end view of the manifold of FIG. 15;
- FIG. 16 is a pian view of the manifold of FIG. 15;
- FIG. 17 is a plan view of a manifold baffle ofthe present invention.
- the internal air connectors are located along the opposite side from the manifold.
- the internal air connectors comprise a female flange 26, a male flange 29 inserted into the female flange, and a hollow cylindrical pressure insert 11, 12, or 13 inserted into the male flange. As illustrated in FIG. 1, the pressure inserts have different inner diameters.
- the pressure insert between the center (or pelvic) cell to the chest cell has an inner diameter of about 0.312 inch
- the pressure insert between the chest cell and the head cell has an inner diameter of about 0.190 inch
- the pressure inserts between the chest cell and the leg cell and the leg cell and the heel cell both have an inner diameter of about 0.172 inch.
- the different inner diameters allows for the different pressures in each cell to comport with the needs of the patient.
- the flanges are made out of urethane to allow for welding to the gussets.
- the pressure inserts in the preferred embodiment are constructed out of a cylindrically shaped hard plastic material. Turning now to FIG. 3, the top piece 14 is illustrated.
- the top piece is a unitary piece of weldable material that is rectangular in shape and is about 87 inches long by about 39 inches wide.
- the weld lines are also depicted in FIG. 3.
- the weld lines for the gussets are the lines extending the length of the top piece and the width lines connected to the length lines.
- the weld lines for the baffles are the width lines that do not extend to the length lines. In the preferred embodiment, there are five gussets and fifteen baffles.
- a plurality of holes 24 are drilled into the top piece to allow for the escape of air from the air mattress. The holes are preferable centered from the baffles and the gussets and have a diameter of about 0.065 inch to about 0.080 inch with a preferred range of about 0.065 to about 0.075 inch.
- each baffle comprise a unitary piece of weldable material that is rectangular in shape and is about 31 inches long by about 9 inches wide.
- Fifteen baffles are placed along the widths ofthe top and bottom pieces as illustrated in FIGS. 3 and 4. As is readily apparent, the baffles do not span the entire widths of the top and bottom pieces. In the preferred embodiment, there is a gap of about 3 to about 4 inches between each and of the baffles and the sides of the top and bottom pieces.
- the head gusset 17 is illustrated in FIGS. 6 and 7.
- the head gusset is constructed from a unitary piece of weldable material that is rectangular in shape and is about 95 inches long by about 9 inches wide.
- a one inch diameter hole 25 is punched into the head gusset about 15.5 inches from one side.
- a female flange 26 is inserted into the hole and welded into place.
- the flange is made out of urethane.
- the dimensions ofthe head gusset are to correspond to the size ofthe head cell ofthe air mattress, which are about 36 inches wide and about 12 inches long.
- the actual dimensions of the head gusset in place in the mattress is slightly smaller than 36 inches by 12 inches due to the presence of ring dies during the welding ofthe air mattress as described below.
- a chest gusset 18 is illustrated in FIGS. 8 and 9.
- the chest gusset is constructed from a unitary piece of weldable material that is rectangular in shape and is about 103 inches long by about 9 inches wide.
- a one inch diameter hole 27 is punched into the chest gusset about 15.5 inches from one side.
- a 0.62 inch diameter hole 28 is punched into the chest gusset about 35.5 inches from the same side as hole 27.
- a female flange 26 is inserted into hole 27 and a male flange 29 is inserted into hole 28. Both flanges are welded into place.
- both flanges are made out of urethane.
- the dimensions ofthe chest gusset are to correspond to the size of the chest cell of the air mattress, being about 36 inches wide and about 16 inches long.
- FIGS. 10 and 1 A center or pelvic gusset 19 is illustrated in FIGS. 10 and 1 1.
- the center gusset is constructed from a unitary piece of weldable material that is rectangular in shape and is about 1 19 inches long by about 9 inches wide.
- Two 0.62 diameter holes 30 are punched into the center gusset, one hole about 15.5 inches from a side and the other hole about 43.5 inches from the same side.
- a one inch diameter hole 31 is punched into the center gusset about 75.5 inches from the same side as holes 30.
- a female sized flange 26 is inserted into hole 31 and two male flanges 29 are inserted into the two holes 30. All of the flanges are welded into place.
- the flanges are made out of urethane.
- the dimensions of the center gusset are to correspond to the size of the center cell of the air mattress, being about 36 inches wide and about 24 inches long.
- a leg gusset 20 is illustrated in FIGS. 12 and 13.
- the leg gusset is constructed from a unitary piece of weldable material that is rectangular in shape and is about 99 inches long by about 9 inches wide.
- a one inch diameter hole 32 is punched into the leg gusset about 14.5 inches from one side.
- a 0.62 inch diameter hole 33 is punched into the leg gusset about 34.5 inches from the same side as hole 32.
- a female flange 26 is inserted into hole 32 and a male flange 29 is inserted into hole 33. Both flanges are welded into place. In the preferred embodiment, both flanges are made out of urethane.
- the dimensions ofthe leg gusset are to correspond to the size ofthe chest cell ofthe air mattress, being about 34 inches wide and about sixteen inches long.
- the air manifold comprises a manifold bladder 22, a manifold rib 35, and two male flanges 26.
- the manifold bladder is constructed out of a unitary piece of weldable material that has two generally rectangular shape areas, the first and larger area being about 28 inches by about 9.75 inches and the second and smaller area being about 28 inches by about 9.0 inches.
- the two rectangular areas are joined along a smaller edge and are both centered as illustrated in FIG. 16. Two one inch holes are punched into the manifold bladder, one hole being punched in the larger rectangular area about 1.5 inches from its edge and the other hole being punched at the center junction of both rectangular areas.
- the manifold rib is illustrated in FIG. 17 and is made out of a unitary piece of weldable material that is about 25 inches long and about 1.5 inches wide.
- the air mattress can be welded by any welding means well known in the art.
- the welds should be air tight welds that can withstand the pressure of a patient laying on the bed.
- the welds are created using a Hissen 100 kilowatt radio frequency (RF) welding machine manufactured in Taipei, Taiwan.
- the RF welding machine comprises two very large flat 6061-T6 aluminum plates and a source of RF energy. Dies are used to focus the RF energy to the welding area. 6061-T6 dies are used in the Hissen RF welding machine.
- To create long linear welds long rectangular shaped aluminum dies are used.
- open box-shaped aluminum ring dies are used that can be split apart near opposite comers of the box-shape. What is meant by the terminology "open box-shaped” is a rectangular six sided box shape that is missing two opposing sides ofthe box, and hence is open.
- circular ring dies are used. As would be appreciated by a person skilled in the art of RF welding, the material to be welded is placed together and a sufficient amount of RF energy is supplied to the material via the welding machines's flat plates and dies to heat the material until a solid weld is formed.
- the actual steps of manufacturing the air mattress is novel in that the baffles are simultaneously welded to the top and bottom pieces while the gussets are loosely in place. Then the gussets are simultaneously welded to the top and bottom pieces.
- This manufacturing process allows for the manufacture of the mattress with minimal amounts of time needed to weld the mattress together, and hence a substantial savings in manufacturing costs occurs.
- the first step of the manufacturing process is to individually weld the male and female flanges into place in each of the gussets and the air manifold. The flanges are welded using appropriately sized circular ring dies.
- each gusset is welded together to create a closed gusset with an open box-shaped structure.
- the free ends are welded to form a smooth butt-seam in the center of one side ofthe open box-shaped as depicted in FIG. 2.
- the dies are only about 7 inches tall and the baffles are about 9 inches tall, there are two inches of excess material height per baffle. Care is taken to center the baffles over the dies such that about one inch of material extends under the bottom ofthe die and one inch of material extends over the top of the die. Additionally, care is taken to make sure the material is laying flat without wrinkles or creases.
- the now open box-shaped gussets are loosely placed in location with the male and female flanges all lined up on the same side except for the center female flange that will be connected to the air manifold. Once all the gussets are in place, the top sheet is fitted over the dies and the top plate ofthe RF welding machine in placed over the top plate. Again care must be taken to make sure that there are no wrinkles or creases in the material. Sufficient RF energy is the applied until the material is welded together. The dies are then removed from the welding machine.
- the next step of the process is to weld all the gussets simultaneously to the top and the bottom pieces.
- the gussets are loosely fitted in place prior to the welding of the baffles.
- the gussets are now located between the top and bottom pieces and baffles are welded inside the gussets to the top piece and to the bottom piece.
- Open box-shaped ring dies are then placed around each gusset. The ring dies separate along their length near opposite comers with smooth surfaces abutting each other.
- each open box-shaped ring die comes in two separate parts, each part containing two entire corners of the box, an entire width ofthe box, most of one length section ofthe box, and about two inches ofthe other length section ofthe box.
- the two parts are symmetrical and when abutted together make an entire open box- shaped ring die.
- the open box-shaped ring dies are dimensioned to fit around each gusset.
- the ring die for welding the head gusset is an open box shape that is about 7 inches tall, about 36 inches long, and about 12 inches wide.
- the ring die for welding the chest gusset is about 7 inches tall, about
- the ring die for welding the center or pelvic gusset is about 7 inches tall, about 36 inches long and about 24 inches wide.
- the ring die for welding the leg gusset is about 7 inches tall, about 34 inches long and about 16 inches wide.
- the ring die for the heel gusset is about 7 inches tall, about 34 inches long and about 12 inches wide.
- Each edge of the ring dies are about 1/8 inch thick and this edge will produce about a 1/8 inch weld line.
- the gussets are centered along the height ofthe ring dies such that a one inch margin of material wraps over the top and bottom edges of the ring die. Care is again taken to prevent wrinkling or creasing the gussets.
- magnets are clipped to the gusset material extending over the free edge ofthe ring dies. The material ofthe gussets that make up the comers ofthe box- shape is carefully curved around the ring dies to minimize bunching. There can be some overlap ofthe corner material without compromising the integrity ofthe weld at the corners.
- the leg and foot gussets are not centered along the width ofthe top and bottom pieces.
- the leg and foot gussets are located 1.5 inches away from one edge ofthe top and bottom pieces and 3.5 inches from the other edge.
- the baffles were welded slightly off-center. The off-center welds ofthe baffles are aligned with the gussets such that there is about 2 inches of distance from the ends of the baffles to the edge ofthe gussets that are opposite the manifold.
- the other end ofthe baffles are about 3 inches from the manifold side edge of the head, chest, and center gussets, and about one inch from the manifold side edge ofthe leg and heel gussets.
- baffles are placed as described above and the bottom piece is fitted over the baffles and the baffles are welded to the top and bottom pieces. Once the baffles have been welded, the assembly is turned over such that the bottom piece is now on the bottom plate ofthe welding machine.
- the gussets and the gusset dies are then fitted as described above and plastic wedges are placed to fold the top piece material into the V-shaped wedges which extend between adjacent gussets and to sustain the necessary tension in the top piece material during welding.
- the gussets are then welded to the top and bottom pieces with the dividers in place using the welding machine.
- the manifold is welded together separately. First, the manifold bladder is folded between the junction ofthe two rectangular areas. The manifold rib is then welded to the two rectangular areas in the manifold bladder along the center line spaced 1.5 inches from the two edges ofthe manifold bladder as illustrated in FIG. 15. Last, the outer seams ofthe manifold bladder are then welded together. The manifold is then welded to the top and bottom pieces adjacent to the leg and heel gussets as indicated in FIG. 2. A simple rectangular die is used to create these welds.
- the air inlet female sized flange ofthe center gusset near the manifold is then inserted into a 3/4 inch inner diameter connector 23 as illustrated in FIG. 2.
- the connector 23 is also connected to a corresponding female sized flange located in the manifold. The air mattress assembly is then complete.
- a blower 37 is connected to the air manifold.
- the blower can be a constant speed blower or a variable blower that allows for the user to select a range of pressures in the different sections.
- a variable speed blower that is suitable for use in the present invention is the Orthoderm Convertible II manufactured by Bio Clinic Co ⁇ oration, Ontario, California. Another suitable blower would be one with the following specifications: maximum pressure of 19.5 inches of H2O; maximum vacuum 18.7 inches H2O; maximum airflow 19.5 SCFM; and a maximum temperature rise of 54°F.
- the blower provides a constant supply of air to the center section of the air mattress.
- the air in the center section can then either exit the center section through one ofthe holes in the top piece or can exit into either the chest section or the leg section via an internal air connector.
- Air in the chest section can either exit the air mattress through a hole in the top piece or can exit into the head section via an internal air connector.
- Air in the head section exits the air mattress through a hole in the top section.
- Air in the leg section can either exit the air mattress through a hole in the top piece or can exit into the heel section through an internal air connector.
- air in the heel section exits the air mattress through a hole in the top piece.
- Table I indicates the relative pressures of each section using a variable speed blower that blows air at a slow rate for the soft setting and blows air at a fast rate for a firm setting.
- the pressures are in mm of Hg.
- an inexpensive cellular air loss system can support a patient with different discrete zones of pressure and also have air flow through the top ofthe mattress to help prevent skin breakdown.
- the actual dimensions used in the illustrated embodiments can be modified to for different sized beds to suit different needs.
- the inner diameters of the pressure inserts can be varied to adjust for different speed air blowers such that the appropriate pressure zones are created.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU10538/97A AU1053897A (en) | 1995-11-13 | 1996-11-12 | Cellular air loss mattress system |
CA002235297A CA2235297A1 (en) | 1995-11-13 | 1996-11-12 | Cellular air loss mattress system |
JP9519130A JP2000500675A (en) | 1995-11-13 | 1996-11-12 | Cell type aero mattress system |
EP96941376A EP0874576A4 (en) | 1995-11-13 | 1996-11-12 | Cellular air loss mattress system |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US645895P | 1995-11-13 | 1995-11-13 | |
US60/006,458 | 1995-11-13 | ||
US08/710,773 | 1996-09-20 | ||
US08/710,773 US5655239A (en) | 1996-09-20 | 1996-09-20 | Cellular air loss mattress system |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997017870A1 true WO1997017870A1 (en) | 1997-05-22 |
Family
ID=26675660
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1996/018432 WO1997017870A1 (en) | 1995-11-13 | 1996-11-12 | Cellular air loss mattress system |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0874576A4 (en) |
JP (1) | JP2000500675A (en) |
AU (1) | AU1053897A (en) |
CA (1) | CA2235297A1 (en) |
WO (1) | WO1997017870A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE50107744D1 (en) * | 2000-11-29 | 2005-11-24 | Prospective Concepts Ag Glattb | PNEUMATIC LIEGE |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4574026A (en) * | 1984-01-03 | 1986-03-04 | Royal Waterbeds, Inc. | Damped waterbed mattress and method for manufacturing same |
US4944060A (en) * | 1989-03-03 | 1990-07-31 | Peery John R | Mattress assembly for the prevention and treatment of decubitus ulcers |
US5090077A (en) | 1991-01-07 | 1992-02-25 | Health Products, Inc. | Cellular patient support for therapeutic air beds |
-
1996
- 1996-11-12 AU AU10538/97A patent/AU1053897A/en not_active Abandoned
- 1996-11-12 WO PCT/US1996/018432 patent/WO1997017870A1/en not_active Application Discontinuation
- 1996-11-12 EP EP96941376A patent/EP0874576A4/en not_active Ceased
- 1996-11-12 JP JP9519130A patent/JP2000500675A/en active Pending
- 1996-11-12 CA CA002235297A patent/CA2235297A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4574026A (en) * | 1984-01-03 | 1986-03-04 | Royal Waterbeds, Inc. | Damped waterbed mattress and method for manufacturing same |
US4944060A (en) * | 1989-03-03 | 1990-07-31 | Peery John R | Mattress assembly for the prevention and treatment of decubitus ulcers |
US5090077A (en) | 1991-01-07 | 1992-02-25 | Health Products, Inc. | Cellular patient support for therapeutic air beds |
Non-Patent Citations (1)
Title |
---|
See also references of EP0874576A4 * |
Also Published As
Publication number | Publication date |
---|---|
AU1053897A (en) | 1997-06-05 |
JP2000500675A (en) | 2000-01-25 |
EP0874576A1 (en) | 1998-11-04 |
CA2235297A1 (en) | 1997-05-22 |
EP0874576A4 (en) | 1999-08-04 |
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