CA1188828A - Sleeping bag with built-in pad - Google Patents
Sleeping bag with built-in padInfo
- Publication number
- CA1188828A CA1188828A CA000420667A CA420667A CA1188828A CA 1188828 A CA1188828 A CA 1188828A CA 000420667 A CA000420667 A CA 000420667A CA 420667 A CA420667 A CA 420667A CA 1188828 A CA1188828 A CA 1188828A
- Authority
- CA
- Canada
- Prior art keywords
- mattress
- cell foam
- closed
- strips
- mattress according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
- A47C27/22—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with both fibrous and foamed material inlays
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
Abstract
ABSTRACT
The invention disclosed relates to an improved mattress construction, particularly for use in a combined sleeping bag/
mattress. The mattress is substantially incompressible under body weight in a vertical direction and is horizontally compres-sible to facilitate packing. Various mattress embodiments are described.
The invention disclosed relates to an improved mattress construction, particularly for use in a combined sleeping bag/
mattress. The mattress is substantially incompressible under body weight in a vertical direction and is horizontally compres-sible to facilitate packing. Various mattress embodiments are described.
Description
`:
This invention rela-tes to mattresses and in particular to sleeping bays incorporating a mattress.
Sleeping bags which include a mattress portion are well-known in the art per se. For e~ample, in Canadian Patent No. 191,612 which issued to B.E. Blockson on 15 July 1919 teaches a sleeping bag comprising a body covering and a mattress forming the bottom of -the bag. 'I'he mattress portion comprises a pocket filled with fibre-fill material. This type of insulation is highly compressible and is satisfac-tory for the body covering O portion. However, the mattress por-tion is vertically compressed by the weight of the user and effectively provides little insula-tion. The required clegree of insulation may be achieved by adding more insulating material below the user. This may be either compressible materials such as down, feathers, fibre-fill, open-cell foam or incompressible ma-terial such as closed-cell foam.
Infla-ted structures are also used. Adding additional compressible insulating material results in additional weight with little return in additional insulating value. Adding incompressible material, usually in the form of a separate foam pad,results in O increased insulating value but the packed volume is high. Inflat-able structures are heavy, inconvenien-t and unreliable.
The foam pad concept is described in Canadian Patent No.
866,09~, which issued 16 March 1971 to J~ Chapuis. This teaching involves a composite laminate structure including a number of layers of different foam materials which is substantially incom-pressible under body weight. However, -this composite structure is not horizontally compressible and -thus requires a large packing volume which is particularly inconvenient from a transportation standpoint.
\~l According to -the invention, a heat insulatiny ma-ttress is con-templated, comprising body support means which is substan-tially incompressible under body weight in a vertical direction;
and heat insulating means associated therewith, so constructed and arranged such that said ma-ttress is compressible in a horizon-tal direction to facilita-te packing.
A sleeping bag incorporating the mattress according to the inven-tion is also contemplated. Several embodiments of com-posite material mattress structures are contemplated, according to the temperature conditions in which -the improved sleeping bag is to be used.
In the drawing which serves to illustrate embodiments of the invention, Figure 1 is a side elevation in section illustrating an improved sleeping bag according to the invention, Figure 2 is a side eleva-tion in section of one embodi-ment of a mattress for use in conjunc-tion with an improved sleep-ing bag according to the invention, Figure 3 is a side eleva-tion in section of another ~o embodiment of a mattress for use in the invention, Figure 4a is a plan view in section of ye-t another embodiment of a mattress for use in the invention, Figure 4b is a perspective view of the Figure 4a arrange-ment illustrating its construction, Figure 5a is a plan view in section of yet another embodi-ment of a mattress for use in the invention, and Figure 5b is a side elevation in section of the same embodimen-t shown in Figure 5a illustrating the optional pad.
Referring specifically to the drawing, in Figure 1 it is seen that the improved sleeping bag according to the invention includes a body covering portion 10 typically filled wi-th a com-pressible insula-tion material such as feathers, down, fibre-fill or open-cell foa~n; and a mattress portion 12 sho~n ln sections w:ithin a pocket 1~ sewn into -the bay. For packing, the rnattress sections are removed from the pocket, s-tacked, horizontally com-pressed and fitted into a transpor-t container not shown.
In the embodiments of the ma-ttress shown in Figure 2, it is seen that the mattress 12 is formed of alternating strips of closed cell foam 16 material such as polye-thylene and polystyrene and open-cell foam 18 such as polyurethane. The closed cell foam is substantially incompressible and provides support for body weight in a vertical direction B. The open cell foam is compres-sible and permits horizontal compression of the mattress 12 in direction A to facilitate packing. The alternating strips of closed cell foam 16 and open cell foam 18 are glued together along their butt-joined surfaces by a suitable adhesive such as 7~ Foam and Fabric Adhesive manufactured by 3 ~ or BOSTIC ~
HOT MELT GLUE. In the embodimen-t illustra-ted in Fig-ure 2, the closed cell foam is shown on the outside. I-t is also contemplated that the open cell foam may form the outside. Many other combina-tions of closed- and open-cell composite foam materials are possi-ble and their geometric arrangement is unimportan-t, provided that the reyions of closed-cell foam do not form a rigid lattice net-work which is hori~on-tally incompressible. There is no require-ment for -the closed-cell foam to be flexible in this embodiment.
Additionally, although the foam strips 16 and 18 are illustrated as running the leng-th of the mattress, they may also be arranged to run across the width of the mattress.
The relative dimensions of the various pieces of the different foam materials are not critical. To give a reasonable lateral compressibility the relative areas of open and closed should be about 5 to 1. To provide even, comfor-table support to the user, the distance between adjacen-t pieces of closed-cell foam should not be more than about 10 cm. A system of alterna-ting strips of the two foams wi-th widths of 5 cm and 1 cm has proved _ 3 0~
convenien-t. These composites are readily made by cutting bulk pieces of the different foams ln-to -the desired shapes and gluing the pieces together.
In the Figure 3 embodiment the open-cell foam may be replaced with a loose particulate insula-ting Eiller material 18a such as polyester fibre-fill, down and feathers, which provides the re~uired horizontal compressibility in direction A. A suitable textile fabric envelope 20 such as a 60 g/m2 rip-s-top nylon is pro-vided to maintain posi-tioning of the closed cell foam elements 16 and the particulate material 18a. The foam elements may be glued -to the textile fabric usiny the same adhesives described above. In this emkodiment -the foam strips are spaced apart about twice their width. As in the figure 2 arrangement, the foam s-trips 16 may be arranged across the width of the mattress.
Turning now to Figure 4, an embodiment named the "egg-crate" which exhibits appropriate horizontal flexibility at moderately low temperatures (O to -~OC) is illustrated in Figures 4a and 4b. This arrangement comprises a flexible lattice network of strips of a suitable flexible closed-cell foam material 16~.
The foam material must be flexible -to permit flexing or compression in a horizontal direction A. Note that this version is compres-sible in any horizon-tal direction ~. Brit-tle closed cell foams such as polys-tyrene tend to break when flexed to any significant extent, especially a-t low temperatures. Closed-cell polyethylene foam has been found suitable. Closed-cell ethylene vinyl ace~ate foam is also contemplated. The pockets be-tween the foam strips 16a are Eilled wi-th a suitable loose heat insulating material 18a such as polyester fibre-fill, down, feathers and the like. As shown in Figure 4b, the foam strips are connected in interlocking fashion. As in the Figure 3 arrangement, a suitable textile fabric envelope 20 is provided for maintaining positioning of the flexible lattice structure and to close the open-ended pockets therebetween to retain the loose insulating material. The foam ., t~
strips are glued along their exposed edges -to the textile material using the same adhesives described above. The flexible lattice arrangement illus-tra-ted comprises 10 cm square pockets. The foam strips are conveniently about 1 cm -thick and abou-t 5 cm wide, to provide a ma-ttress element about 5 cm thick. Other yeometric networl~s could be used such as circles and hexagons, provided that ho:rizontal compressibility is maintained.
Refer~ing to Figures 5a and 5b, an embodiment called the "bed of nails" is illustrated. This version shows adequate hori~on-tal compressibili-ty at ex-tremely cold temperatures i.e.
down to -40C. The nail elements 16b of a suitable closed-cell foam materlal such as closed-cell polyethylene are evenly spaced about the same distance apart as their dimension. Other closed cell foam materials such as polystyrene may also be used since the same degree of flexibility is not required in this arrangement as in the Figure 4 arrangemen-t. The nail elements are arranged in a textile fabric envelope 20 and surrounded by loose heat insulating material 18a as described in the previous embodiments. The nail elements 16b are glued to the textile fabric 20 at their exposed ends by the same adhesives described previously.
The dimensions of the "nails" are dictated by the thic~ness of the mattress. They must be approximately cubic to suppor-t body weight without bending or toppling. The inter~nail spacing is of the same order of magnitude as the nail dimension to provide for a reasonable compromise between compressibility and evenness of support. The resulting mattress is therefore rather bumpy and uncomfortable, though thermally adequa-te. To allevia-te this discomfort an optional layer 22 of suitable closed-cell foam such as closed-cell polyethylene foam is added on top of the mattress as shown in Figure 5b. The additional layer 22 is conventionly about 1 cm thick.
In this embodimen-t, both -the mattress and the additional foam layer 22 are enclosed :in a poclcet in the bottom of thesleeping bag. The foam layer is removed for packiny but the pad can stay in the hag which can then be compressed and s-tuffed into i-ts carxyin~ case. The mattress need not, -therefore, be con-structed in sections but may be one long piece and may be built into the sleeping bag permanently rather than belng made removable.
The advantage of a removable mattress is that -the various pieces of the bag may be laundered, repaired or replaced separately.
The "nails" may also be in other shapes such as cylinders of appropriate dimensions.
Overal1 Dimen_ions The length of the mattress is the length of the bag or the height of -the user, typically 190 cm.
The width is the minimum consisten-t with comfort so as to minimize packed volume. We find 42 cm to be acceptable though a large person mi~ht require more width~ 40 to 50 cm is a reasonable width range.
The thiclcness of the mat-tress depends on the temperature of the ground on which it is to be used. Above 0C, 2 cm is adequate and at -40C, about 6 cm required. There is probably little poin-t in using complicated/ and therefore expensive, con-struction techniques for warmer applications when simple layers of foam are adequate. Although it might be desirable to have very thick pads at low temperatures, the packed volume acts as a constraint. A thickness range of 3 to 8 cm thickness is therefore realis-tic.
This invention rela-tes to mattresses and in particular to sleeping bays incorporating a mattress.
Sleeping bags which include a mattress portion are well-known in the art per se. For e~ample, in Canadian Patent No. 191,612 which issued to B.E. Blockson on 15 July 1919 teaches a sleeping bag comprising a body covering and a mattress forming the bottom of -the bag. 'I'he mattress portion comprises a pocket filled with fibre-fill material. This type of insulation is highly compressible and is satisfac-tory for the body covering O portion. However, the mattress por-tion is vertically compressed by the weight of the user and effectively provides little insula-tion. The required clegree of insulation may be achieved by adding more insulating material below the user. This may be either compressible materials such as down, feathers, fibre-fill, open-cell foam or incompressible ma-terial such as closed-cell foam.
Infla-ted structures are also used. Adding additional compressible insulating material results in additional weight with little return in additional insulating value. Adding incompressible material, usually in the form of a separate foam pad,results in O increased insulating value but the packed volume is high. Inflat-able structures are heavy, inconvenien-t and unreliable.
The foam pad concept is described in Canadian Patent No.
866,09~, which issued 16 March 1971 to J~ Chapuis. This teaching involves a composite laminate structure including a number of layers of different foam materials which is substantially incom-pressible under body weight. However, -this composite structure is not horizontally compressible and -thus requires a large packing volume which is particularly inconvenient from a transportation standpoint.
\~l According to -the invention, a heat insulatiny ma-ttress is con-templated, comprising body support means which is substan-tially incompressible under body weight in a vertical direction;
and heat insulating means associated therewith, so constructed and arranged such that said ma-ttress is compressible in a horizon-tal direction to facilita-te packing.
A sleeping bag incorporating the mattress according to the inven-tion is also contemplated. Several embodiments of com-posite material mattress structures are contemplated, according to the temperature conditions in which -the improved sleeping bag is to be used.
In the drawing which serves to illustrate embodiments of the invention, Figure 1 is a side elevation in section illustrating an improved sleeping bag according to the invention, Figure 2 is a side eleva-tion in section of one embodi-ment of a mattress for use in conjunc-tion with an improved sleep-ing bag according to the invention, Figure 3 is a side eleva-tion in section of another ~o embodiment of a mattress for use in the invention, Figure 4a is a plan view in section of ye-t another embodiment of a mattress for use in the invention, Figure 4b is a perspective view of the Figure 4a arrange-ment illustrating its construction, Figure 5a is a plan view in section of yet another embodi-ment of a mattress for use in the invention, and Figure 5b is a side elevation in section of the same embodimen-t shown in Figure 5a illustrating the optional pad.
Referring specifically to the drawing, in Figure 1 it is seen that the improved sleeping bag according to the invention includes a body covering portion 10 typically filled wi-th a com-pressible insula-tion material such as feathers, down, fibre-fill or open-cell foa~n; and a mattress portion 12 sho~n ln sections w:ithin a pocket 1~ sewn into -the bay. For packing, the rnattress sections are removed from the pocket, s-tacked, horizontally com-pressed and fitted into a transpor-t container not shown.
In the embodiments of the ma-ttress shown in Figure 2, it is seen that the mattress 12 is formed of alternating strips of closed cell foam 16 material such as polye-thylene and polystyrene and open-cell foam 18 such as polyurethane. The closed cell foam is substantially incompressible and provides support for body weight in a vertical direction B. The open cell foam is compres-sible and permits horizontal compression of the mattress 12 in direction A to facilitate packing. The alternating strips of closed cell foam 16 and open cell foam 18 are glued together along their butt-joined surfaces by a suitable adhesive such as 7~ Foam and Fabric Adhesive manufactured by 3 ~ or BOSTIC ~
HOT MELT GLUE. In the embodimen-t illustra-ted in Fig-ure 2, the closed cell foam is shown on the outside. I-t is also contemplated that the open cell foam may form the outside. Many other combina-tions of closed- and open-cell composite foam materials are possi-ble and their geometric arrangement is unimportan-t, provided that the reyions of closed-cell foam do not form a rigid lattice net-work which is hori~on-tally incompressible. There is no require-ment for -the closed-cell foam to be flexible in this embodiment.
Additionally, although the foam strips 16 and 18 are illustrated as running the leng-th of the mattress, they may also be arranged to run across the width of the mattress.
The relative dimensions of the various pieces of the different foam materials are not critical. To give a reasonable lateral compressibility the relative areas of open and closed should be about 5 to 1. To provide even, comfor-table support to the user, the distance between adjacen-t pieces of closed-cell foam should not be more than about 10 cm. A system of alterna-ting strips of the two foams wi-th widths of 5 cm and 1 cm has proved _ 3 0~
convenien-t. These composites are readily made by cutting bulk pieces of the different foams ln-to -the desired shapes and gluing the pieces together.
In the Figure 3 embodiment the open-cell foam may be replaced with a loose particulate insula-ting Eiller material 18a such as polyester fibre-fill, down and feathers, which provides the re~uired horizontal compressibility in direction A. A suitable textile fabric envelope 20 such as a 60 g/m2 rip-s-top nylon is pro-vided to maintain posi-tioning of the closed cell foam elements 16 and the particulate material 18a. The foam elements may be glued -to the textile fabric usiny the same adhesives described above. In this emkodiment -the foam strips are spaced apart about twice their width. As in the figure 2 arrangement, the foam s-trips 16 may be arranged across the width of the mattress.
Turning now to Figure 4, an embodiment named the "egg-crate" which exhibits appropriate horizontal flexibility at moderately low temperatures (O to -~OC) is illustrated in Figures 4a and 4b. This arrangement comprises a flexible lattice network of strips of a suitable flexible closed-cell foam material 16~.
The foam material must be flexible -to permit flexing or compression in a horizontal direction A. Note that this version is compres-sible in any horizon-tal direction ~. Brit-tle closed cell foams such as polys-tyrene tend to break when flexed to any significant extent, especially a-t low temperatures. Closed-cell polyethylene foam has been found suitable. Closed-cell ethylene vinyl ace~ate foam is also contemplated. The pockets be-tween the foam strips 16a are Eilled wi-th a suitable loose heat insulating material 18a such as polyester fibre-fill, down, feathers and the like. As shown in Figure 4b, the foam strips are connected in interlocking fashion. As in the Figure 3 arrangement, a suitable textile fabric envelope 20 is provided for maintaining positioning of the flexible lattice structure and to close the open-ended pockets therebetween to retain the loose insulating material. The foam ., t~
strips are glued along their exposed edges -to the textile material using the same adhesives described above. The flexible lattice arrangement illus-tra-ted comprises 10 cm square pockets. The foam strips are conveniently about 1 cm -thick and abou-t 5 cm wide, to provide a ma-ttress element about 5 cm thick. Other yeometric networl~s could be used such as circles and hexagons, provided that ho:rizontal compressibility is maintained.
Refer~ing to Figures 5a and 5b, an embodiment called the "bed of nails" is illustrated. This version shows adequate hori~on-tal compressibili-ty at ex-tremely cold temperatures i.e.
down to -40C. The nail elements 16b of a suitable closed-cell foam materlal such as closed-cell polyethylene are evenly spaced about the same distance apart as their dimension. Other closed cell foam materials such as polystyrene may also be used since the same degree of flexibility is not required in this arrangement as in the Figure 4 arrangemen-t. The nail elements are arranged in a textile fabric envelope 20 and surrounded by loose heat insulating material 18a as described in the previous embodiments. The nail elements 16b are glued to the textile fabric 20 at their exposed ends by the same adhesives described previously.
The dimensions of the "nails" are dictated by the thic~ness of the mattress. They must be approximately cubic to suppor-t body weight without bending or toppling. The inter~nail spacing is of the same order of magnitude as the nail dimension to provide for a reasonable compromise between compressibility and evenness of support. The resulting mattress is therefore rather bumpy and uncomfortable, though thermally adequa-te. To allevia-te this discomfort an optional layer 22 of suitable closed-cell foam such as closed-cell polyethylene foam is added on top of the mattress as shown in Figure 5b. The additional layer 22 is conventionly about 1 cm thick.
In this embodimen-t, both -the mattress and the additional foam layer 22 are enclosed :in a poclcet in the bottom of thesleeping bag. The foam layer is removed for packiny but the pad can stay in the hag which can then be compressed and s-tuffed into i-ts carxyin~ case. The mattress need not, -therefore, be con-structed in sections but may be one long piece and may be built into the sleeping bag permanently rather than belng made removable.
The advantage of a removable mattress is that -the various pieces of the bag may be laundered, repaired or replaced separately.
The "nails" may also be in other shapes such as cylinders of appropriate dimensions.
Overal1 Dimen_ions The length of the mattress is the length of the bag or the height of -the user, typically 190 cm.
The width is the minimum consisten-t with comfort so as to minimize packed volume. We find 42 cm to be acceptable though a large person mi~ht require more width~ 40 to 50 cm is a reasonable width range.
The thiclcness of the mat-tress depends on the temperature of the ground on which it is to be used. Above 0C, 2 cm is adequate and at -40C, about 6 cm required. There is probably little poin-t in using complicated/ and therefore expensive, con-struction techniques for warmer applications when simple layers of foam are adequate. Although it might be desirable to have very thick pads at low temperatures, the packed volume acts as a constraint. A thickness range of 3 to 8 cm thickness is therefore realis-tic.
Claims (14)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A heat insulating mattress, comprising body support means which is substantially incompressible under body weight in a vertical direction; and substantially non-load bearing heat insulating means associated therewith, so constructed and arranged such that said mattress is compressible in a horizontal direction to facilitate packing.
2. A mattress according to claim 1, wherein said body support means comprises a plurality of substantially equally spaced parallel strips of a suitable closed-cell foam material, said spaces being filled with said heat insulating material in the form of strips of suitable open-cell foam material, wherein said closed- and open-cell foam strips are held together by a suitable adhesive.
3. A mattress according to claim 2, wherein the relative widths of the open-cell foam strips to the closed-cell foam strips is about 5:1.
4. A mattress according to claim 2 or 3, wherein said closed-cell foam material is polyethylene and wherein said open-cell foam material is polyurethane.
5. A mattress according to claim 1, wherein said body sup-port means comprises a plurality of substantially equally spaced parallel strips of a suitable closed-cell foam material, said spaces being filled with a said heat insulating material in the form of loose, insulating material selected from the group con-sisting of down, feathers and polyester fibre-fill, additionally comprising envelope means of a suitable textile material surround-ing said mattress, wherein said foam strips are attached along their length to said textile material by a suitable adhesive to maintain the position of said strips.
6. A mattress according to claim 5, wherein the foam strips are spaced about twice their width.
7. A mattress according to claims 5 or 6, wherein the closed-cell foam material is polyethylene.
8. A mattress according to claim 1, wherein said body support means comprises interlocking strips of flexible closed-cell foam material in the form of a flexible lattice network which is compressible in any horizontal direction, defining plurality of open-ended pockets filled with said heat insulating material in the form of loose, insulating material selected from the group consisting of down, feathers and polyester fibre-fill, additionally comprising envelope means of a suitable textile material surrounding said mattress, wherein said foam strips are attached along their length to said textile material by a suitable adhesive to maintain the positioning of said strips.
9. A mattress according to claim 8, wherein the closed-cell foam is flexible polyethylene foam.
10. A mattress according to claim 9, wherein the lattice network is in the form of 10 cm squares.
11. A mattress according to claim 1, wherein said body support means comprises a plurality of cubic nail elements of a suitable closed-cell foam material substantially equally spaced about the same distance apart as their dimension, said spaces being filled with said heat insulating material in the form of loose, insulating material selected from the group consisting of down, feathers and polyester fibre-fill, additionally comprising envelope means of a suitable textile material surrounding said mattress, wherein said nail elements are attached at their exposed ends to said textile material by a suitable adhesive to maintain positioning of said nail elements.
12. A mattress according to claim 11, wherein the nail elements are of a closed cell foam material selected from poly-ethylene and polystyrene.
13. A mattress according to claim 2, 5 or 8, wherein the width of said closed-cell foam strips is about 1 cm.
14. A combined sleeping bag/mattress, said sleeping bag comprising a body covering portion and a mattress portion, said mattress portion comprising body support means which is substan-tially incompressible under body weight in a vertical direction;
and substantially non-load bearing heat insulating means associated therewith, so constructed and arranged such that said mattress is compressible in a horizontal direction to facilitate packing.
and substantially non-load bearing heat insulating means associated therewith, so constructed and arranged such that said mattress is compressible in a horizontal direction to facilitate packing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000420667A CA1188828A (en) | 1983-02-01 | 1983-02-01 | Sleeping bag with built-in pad |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000420667A CA1188828A (en) | 1983-02-01 | 1983-02-01 | Sleeping bag with built-in pad |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1188828A true CA1188828A (en) | 1985-06-11 |
Family
ID=4124470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000420667A Expired CA1188828A (en) | 1983-02-01 | 1983-02-01 | Sleeping bag with built-in pad |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1188828A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4998296A (en) * | 1989-11-28 | 1991-03-12 | Stames Rebecca M | Hypothermia protection suit collapsible into compact package for storage |
| US5027458A (en) * | 1990-02-01 | 1991-07-02 | Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence | Collapsible heat insulating mattress having foam lattice cells and a slit foil sheet covering |
| GB2434979A (en) * | 2006-02-09 | 2007-08-15 | Andrew Blair Allan | An adjustable lattice base system |
-
1983
- 1983-02-01 CA CA000420667A patent/CA1188828A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4998296A (en) * | 1989-11-28 | 1991-03-12 | Stames Rebecca M | Hypothermia protection suit collapsible into compact package for storage |
| US5027458A (en) * | 1990-02-01 | 1991-07-02 | Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence | Collapsible heat insulating mattress having foam lattice cells and a slit foil sheet covering |
| GB2434979A (en) * | 2006-02-09 | 2007-08-15 | Andrew Blair Allan | An adjustable lattice base system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |