CA1139024A - Molded, foam cushion pad having surface elevations of varying groupings, heights and geometries - Google Patents
Molded, foam cushion pad having surface elevations of varying groupings, heights and geometriesInfo
- Publication number
- CA1139024A CA1139024A CA000353856A CA353856A CA1139024A CA 1139024 A CA1139024 A CA 1139024A CA 000353856 A CA000353856 A CA 000353856A CA 353856 A CA353856 A CA 353856A CA 1139024 A CA1139024 A CA 1139024A
- Authority
- CA
- Canada
- Prior art keywords
- elevations
- pad
- groupings
- cushion pad
- heights
- 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
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/02—Seat parts
- A47C7/18—Seat parts having foamed material included in cushioning part
Landscapes
- Mattresses And Other Support Structures For Chairs And Beds (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
- Buffer Packaging (AREA)
Abstract
Mo-2124 LeA 19,749 A MOLDED, FOAM CUSHION PAD HAVING SURFACE ELEVATIONS
OF VARYING GROUPINGS, HEIGHTS AND GEOMETRIES
ABSTRACT OF THE DISCLOSURE
The invention is directed to a foam cushion pad having surface elevations of various geometries, heights and groupings to accommodate differences in load occurring in different areas of the pad during use.
The foam cushion pad having the surface elevations is molded in one continuous piece. The surface elevations are separated by free space and are significantly shorter than the height of the pad.
OF VARYING GROUPINGS, HEIGHTS AND GEOMETRIES
ABSTRACT OF THE DISCLOSURE
The invention is directed to a foam cushion pad having surface elevations of various geometries, heights and groupings to accommodate differences in load occurring in different areas of the pad during use.
The foam cushion pad having the surface elevations is molded in one continuous piece. The surface elevations are separated by free space and are significantly shorter than the height of the pad.
Description
g~
-1- Mo-2124 LeA 19, 749 A MOLDED, FOAM CUSHION PAD HAVING SURFACE :ELEVATIONS
OF VARYING GROUPINGS, HEIG~ITS AND OEOMET~IES
BACKGROUND OF ~HE INVENTION
This invention is directed to a eushion pad foamed in a mold having surface elevations in the ~orm of cylinders, eones, truneated eones, pyramids, truncated pyramids, curved surfaces of segments of spheres, cuboids, prisms, ribs and the like. Such cushions are useful in the furniture and automotive industries.
The choice of the right compression hardness characteristics for various portions of a cushion is essantial to obtain a comfortable padding quality suited to the various contours and weight distributions of the body.
One attempt to achieve the appropria~e distri-bution of eompressiPn hardness characteristies has been to stiek togethar seetions of block foam having differing strain hardenings. However, this method is complicated and the labor eost is high. ~nother solution has been to foam in or around prefabricated moldings.
An additional attempt to achieve an appropriate distribution of compression hardness characteristics in a cushion has been to reduce the carrying volume of the foamed plastic by forming spaced recssses to obtain a decrease in the hardness in subdomains of the padding.
Finally, padded eushions having elevations of the same shape and siza to fit the surface which is to bear the strain (e.g. seat, back or arm rest) produced by in mold foaming are also known. These cushions, while economical to produce, do not at all provide for optimal adaptation to the human body.
reA 19,749 When the previowsly men-tioned padded cushions come under strain, indentations always appear in addi-tion to those in the directly stressed surfaces (e.g.
in car seats, the surface stressed by the upper thigh of the passenger) and the neighboring areas in the cushion which are not under strain become distorted by a sideways buckling tensile stress. Thus, adjustment of the desired local differences in the hardness is impossible.
The object of the invention is to provide a padded cushion which shows optimal compression hardness characteristics suitable for both body comfort and for withstanding strain.
BRIEF DESCRIPTION OF THE DRAWINGS
. ~
Figure 1 represents a pad for a cushion in plan view.
~ Figure 2 represents a pad for a cushion in a sectional view along line A-B in Figure 1.
Figure 3 represents the manner in which the ele-vations of differing geometries accommodate differencesin load.
DESCRIPTION OF THE INVENTION
The object of the invention can be achieved by providing a foam pad for a cushion, -the foam pad haviny a surface with elevations wherein (a) the elevations and the pad are foamed in a mold as one continuous piece of foam, and (b) the foam pad has groups of elevations of differing geometry. These elevations which are sepa-rated by free space accommodate differences in loadoccurring in different areas in the pad during use.
These elevations are also significantly shorter than the height of the pad.
LeA 19,749 , -2a-The foam pad may constitute the cushion .itself-or the foam pad may be covered with any known suitable materials to form the complete cushion. The foam pad has a surface with elevations which may be in the form of cylinders, cones, truncated cones, pyramids, trun-cated pyramids, curved surfaces of segments of spheres, cuboids, prisms, ribs or the like.
LeA 19,749 - ' ,4L ' ~
~ t~
The elevations and the cushion pad can be foam0d simultaneously by the process Of in~mold foaming to produce a cushion pad having elevations of differing geometries. For example, in the case of seating surfaces, elevations of a different geometry can be provided in the highly stressed area of the cushion which contacts the posterior of the body from those provided in the less stressed area of the cushion which contacts the upper t~igh.
The elevations can have the most varied formations.
Various sizes, heights, geometries and groupings of the elevations may be used depending on such characteristics as the stresses on various parts o~ the cushion due to contact with different parks of the body. Size and height are also particularly inf'luential for adjusting the hardness characteristics.
Given a uniform amount of force flat, wide elevations produce ~reater softness at the beginning of the stress phase than conventional pads; high slender elevations are greatly deformed when first stressed, thus they give the initial impression of being very soft, whereas upon being deformed further the rise in hardness increases considerably in com-parison with non-contoured, conventional seat paddinæ.
From this it can be concluded generally that elevations always bring about greater softness of the padding;
their height and size determine the rate of increase in the foam hardness during the indentation phase as the user sits down.
In the production of padded cushions by in-mold foaming, a reaction system may be used which, for e~ample, forms a polyurethane foam having a high compression hardness. The areas of the padded cushion LeA 19,749 g~
which are to be adjusted ~o be more soft may be obtained through the correspo~ding dimensioning of the elevations in a manner loosely similar to the ~ormation of a nap. In this way, padded cushions with increasingly varying hardness may be produced where the transition from one degree of hardness to another can be almost con~inuous.
The elevations cannot be seen once the cover has been fitted to the cushion pad of the invention.
Additionally, due to the presence of free spaces between the elevations which permit the circulation of air, there is a great improvement in seating comfort.
Figures l and 2 illustrate an embodiment of the invention in the context of a car seat. The padded cushion (l) has side supports (2j between which stretches the actual seating surface (3). The seating surface (3) is covered with three groups (4, 5 and 6) of truncated cylinder-like elevations (7) of differing size and height.
Figure 3 shows in the left half the sitting region of a vehicle seat, the differently shaped ele-vations on which are distributed according to the contacting sitting region of the user and the stress thus formed. The right half shows the distribution of pressure exerted by a person of approximately 75 kg in weight.
Example A seat padding 1, according to Fig. 1 and 2, for motor vehicles consists of a polyurethane soft foam with a density of 50 kg/dm3. The padding 1 has the measurements: 58 cm wide, 56 cm long and 15 cm deep in the sitting region. The actual sitting region 3 LeA 19,749 is 35 cm wide and merges into the side reinforcements 2.
The sitting region 3 is provided with cylindrical ele-vations 7. These elevations 7 are 10 mm high and 20 mm in diameter in zone 4. 150 elevation3 7 are provided over an area of 980 cm . In zone 5 the elevations 7 are 5 mm in height and 40 mm in diameter. 30 elevations 7 are provided over an area o~ 490 cm2~ In zone 6 the elevations are 7 mm in height and 30 mm in diameter.
40 elevations 7 are provided over an area of 450 cm2.
This arrangement provides a pleasant initial impression on sittlng down.
LeA 19,749
-1- Mo-2124 LeA 19, 749 A MOLDED, FOAM CUSHION PAD HAVING SURFACE :ELEVATIONS
OF VARYING GROUPINGS, HEIG~ITS AND OEOMET~IES
BACKGROUND OF ~HE INVENTION
This invention is directed to a eushion pad foamed in a mold having surface elevations in the ~orm of cylinders, eones, truneated eones, pyramids, truncated pyramids, curved surfaces of segments of spheres, cuboids, prisms, ribs and the like. Such cushions are useful in the furniture and automotive industries.
The choice of the right compression hardness characteristics for various portions of a cushion is essantial to obtain a comfortable padding quality suited to the various contours and weight distributions of the body.
One attempt to achieve the appropria~e distri-bution of eompressiPn hardness characteristies has been to stiek togethar seetions of block foam having differing strain hardenings. However, this method is complicated and the labor eost is high. ~nother solution has been to foam in or around prefabricated moldings.
An additional attempt to achieve an appropriate distribution of compression hardness characteristics in a cushion has been to reduce the carrying volume of the foamed plastic by forming spaced recssses to obtain a decrease in the hardness in subdomains of the padding.
Finally, padded eushions having elevations of the same shape and siza to fit the surface which is to bear the strain (e.g. seat, back or arm rest) produced by in mold foaming are also known. These cushions, while economical to produce, do not at all provide for optimal adaptation to the human body.
reA 19,749 When the previowsly men-tioned padded cushions come under strain, indentations always appear in addi-tion to those in the directly stressed surfaces (e.g.
in car seats, the surface stressed by the upper thigh of the passenger) and the neighboring areas in the cushion which are not under strain become distorted by a sideways buckling tensile stress. Thus, adjustment of the desired local differences in the hardness is impossible.
The object of the invention is to provide a padded cushion which shows optimal compression hardness characteristics suitable for both body comfort and for withstanding strain.
BRIEF DESCRIPTION OF THE DRAWINGS
. ~
Figure 1 represents a pad for a cushion in plan view.
~ Figure 2 represents a pad for a cushion in a sectional view along line A-B in Figure 1.
Figure 3 represents the manner in which the ele-vations of differing geometries accommodate differencesin load.
DESCRIPTION OF THE INVENTION
The object of the invention can be achieved by providing a foam pad for a cushion, -the foam pad haviny a surface with elevations wherein (a) the elevations and the pad are foamed in a mold as one continuous piece of foam, and (b) the foam pad has groups of elevations of differing geometry. These elevations which are sepa-rated by free space accommodate differences in loadoccurring in different areas in the pad during use.
These elevations are also significantly shorter than the height of the pad.
LeA 19,749 , -2a-The foam pad may constitute the cushion .itself-or the foam pad may be covered with any known suitable materials to form the complete cushion. The foam pad has a surface with elevations which may be in the form of cylinders, cones, truncated cones, pyramids, trun-cated pyramids, curved surfaces of segments of spheres, cuboids, prisms, ribs or the like.
LeA 19,749 - ' ,4L ' ~
~ t~
The elevations and the cushion pad can be foam0d simultaneously by the process Of in~mold foaming to produce a cushion pad having elevations of differing geometries. For example, in the case of seating surfaces, elevations of a different geometry can be provided in the highly stressed area of the cushion which contacts the posterior of the body from those provided in the less stressed area of the cushion which contacts the upper t~igh.
The elevations can have the most varied formations.
Various sizes, heights, geometries and groupings of the elevations may be used depending on such characteristics as the stresses on various parts o~ the cushion due to contact with different parks of the body. Size and height are also particularly inf'luential for adjusting the hardness characteristics.
Given a uniform amount of force flat, wide elevations produce ~reater softness at the beginning of the stress phase than conventional pads; high slender elevations are greatly deformed when first stressed, thus they give the initial impression of being very soft, whereas upon being deformed further the rise in hardness increases considerably in com-parison with non-contoured, conventional seat paddinæ.
From this it can be concluded generally that elevations always bring about greater softness of the padding;
their height and size determine the rate of increase in the foam hardness during the indentation phase as the user sits down.
In the production of padded cushions by in-mold foaming, a reaction system may be used which, for e~ample, forms a polyurethane foam having a high compression hardness. The areas of the padded cushion LeA 19,749 g~
which are to be adjusted ~o be more soft may be obtained through the correspo~ding dimensioning of the elevations in a manner loosely similar to the ~ormation of a nap. In this way, padded cushions with increasingly varying hardness may be produced where the transition from one degree of hardness to another can be almost con~inuous.
The elevations cannot be seen once the cover has been fitted to the cushion pad of the invention.
Additionally, due to the presence of free spaces between the elevations which permit the circulation of air, there is a great improvement in seating comfort.
Figures l and 2 illustrate an embodiment of the invention in the context of a car seat. The padded cushion (l) has side supports (2j between which stretches the actual seating surface (3). The seating surface (3) is covered with three groups (4, 5 and 6) of truncated cylinder-like elevations (7) of differing size and height.
Figure 3 shows in the left half the sitting region of a vehicle seat, the differently shaped ele-vations on which are distributed according to the contacting sitting region of the user and the stress thus formed. The right half shows the distribution of pressure exerted by a person of approximately 75 kg in weight.
Example A seat padding 1, according to Fig. 1 and 2, for motor vehicles consists of a polyurethane soft foam with a density of 50 kg/dm3. The padding 1 has the measurements: 58 cm wide, 56 cm long and 15 cm deep in the sitting region. The actual sitting region 3 LeA 19,749 is 35 cm wide and merges into the side reinforcements 2.
The sitting region 3 is provided with cylindrical ele-vations 7. These elevations 7 are 10 mm high and 20 mm in diameter in zone 4. 150 elevation3 7 are provided over an area of 980 cm . In zone 5 the elevations 7 are 5 mm in height and 40 mm in diameter. 30 elevations 7 are provided over an area o~ 490 cm2~ In zone 6 the elevations are 7 mm in height and 30 mm in diameter.
40 elevations 7 are provided over an area of 450 cm2.
This arrangement provides a pleasant initial impression on sittlng down.
LeA 19,749
Claims (3)
1. A foam pad having a surface with elevations wherein (a) said elevations and said foam pad are foamed in a mold as one continuous piece, (b) said elevations comprise groups of differing geometry to accomodate the difference in load occurring in differ-ent areas in the pad during use, and (c) said elevations which are separated by free space are significantly shorter than the height of the pad.
2. A foam pad as claimed in Claim 1 wherein said elevations are in the shape of truncated cylinders, cones, truncated cones, pyramids, truncated pyramids, curved surfaces of segments of spheres, cuboids, prisms, ribs or mixtures thereof.
3. A foam pad as claimed in Claim 1 wherein said elevations of at least two of said groups have different heights in a direction approximately perpen-dicular to said surface.
LeA 19,749
LeA 19,749
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP2924662.6 | 1979-06-19 | ||
| DE19792924662 DE2924662A1 (en) | 1979-06-19 | 1979-06-19 | SHAPED FOAM UPHOLSTERY PILLOW |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1139024A true CA1139024A (en) | 1983-01-04 |
Family
ID=6073565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000353856A Expired CA1139024A (en) | 1979-06-19 | 1980-06-12 | Molded, foam cushion pad having surface elevations of varying groupings, heights and geometries |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0021191B1 (en) |
| JP (1) | JPS564570A (en) |
| AU (1) | AU532480B2 (en) |
| BR (1) | BR8003787A (en) |
| CA (1) | CA1139024A (en) |
| DE (2) | DE2924662A1 (en) |
| ES (1) | ES251483Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1987007124A1 (en) * | 1986-05-26 | 1987-12-03 | Peter George Gordon Gregory | A chair member |
| WO2006102751A1 (en) * | 2005-03-30 | 2006-10-05 | Woodbridge Foam Corporation | Foam seat element, mold for the production thereof and method to manufacture the mold |
| US9038252B2 (en) | 2006-08-30 | 2015-05-26 | Lear Corporation | Vehicle seat assembly having a hardness gradient via surface intrusions and/or protrusions |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0281694A1 (en) * | 1987-03-11 | 1988-09-14 | Magerik Ltd | A seat |
| ZA891755B (en) * | 1988-06-30 | 1989-11-29 | Johanna Groenewald Petronella | Mattress |
| CN1028150C (en) * | 1988-10-31 | 1995-04-12 | 石贵春 | Method of and apparatus for medical-therapeutic treatment of human body |
| DE4434396A1 (en) * | 1994-09-27 | 1996-03-28 | Silja Praski | Back massager and scratching device |
| DE19736839A1 (en) * | 1997-08-23 | 1999-02-25 | Volkswagen Ag | Deformation structure for occupant protection in vehicles |
| US6336681B1 (en) | 1998-05-18 | 2002-01-08 | Robert Andrew Crosbie | Chair and seat cushion therefor |
| US6726285B2 (en) | 2000-07-03 | 2004-04-27 | Herman Miller, Inc. | Cellular chair construction |
| US7934774B2 (en) | 2006-03-31 | 2011-05-03 | Lear Corporation | Vehicle seat assembly having a hardness gradient |
| GB2441417A (en) * | 2006-08-30 | 2008-03-05 | Lear Corp | Vehicle seat cushion with holes to make regions of the cushion softer than others |
| JP2010504975A (en) | 2006-09-29 | 2010-02-18 | ゲンズイメ コーポレーション | Amide dendrimer composition |
| JP5242088B2 (en) * | 2007-06-27 | 2013-07-24 | 株式会社イノアックコーポレーション | Automotive seat cushion |
| DE102009057072B4 (en) * | 2009-12-04 | 2016-08-11 | Grammer Aktiengesellschaft | Pad with ventilation for a vehicle seat |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB847131A (en) * | 1957-08-02 | 1960-09-07 | Hallam Sleigh & Cheston Ltd | Improvements in seats |
| DE2132741A1 (en) * | 1971-03-31 | 1973-01-11 | Emil Hoeck | SEAT CUSHION |
| JPS51150459A (en) * | 1975-06-19 | 1976-12-24 | Jiyunji Yamada | Cushion for chair |
| DE2837630C2 (en) * | 1978-08-29 | 1983-04-21 | F. Biedermann Gmbh & Co Kg, 7450 Hechingen | Work chair |
-
1979
- 1979-06-19 DE DE19792924662 patent/DE2924662A1/en not_active Withdrawn
-
1980
- 1980-06-06 EP EP80103158A patent/EP0021191B1/en not_active Expired
- 1980-06-06 DE DE8080103158T patent/DE3060337D1/en not_active Expired
- 1980-06-12 CA CA000353856A patent/CA1139024A/en not_active Expired
- 1980-06-17 JP JP8098880A patent/JPS564570A/en active Pending
- 1980-06-18 ES ES1980251483U patent/ES251483Y/en not_active Expired
- 1980-06-18 BR BR8003787A patent/BR8003787A/en unknown
- 1980-06-18 AU AU59390/80A patent/AU532480B2/en not_active Ceased
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1987007124A1 (en) * | 1986-05-26 | 1987-12-03 | Peter George Gordon Gregory | A chair member |
| WO2006102751A1 (en) * | 2005-03-30 | 2006-10-05 | Woodbridge Foam Corporation | Foam seat element, mold for the production thereof and method to manufacture the mold |
| US8821777B2 (en) | 2005-03-30 | 2014-09-02 | Proprietect L.P. | Foam seat element, mold for the production thereof and method to manufacture the mold |
| US10492612B2 (en) | 2005-03-30 | 2019-12-03 | Proprietect L.P. | Foam seat element, mold for the production thereof and method to manufacture the mold |
| EP1871197B1 (en) * | 2005-03-30 | 2022-03-23 | Woodbridge Foam Corporation | Foam seat element, mold for the production thereof and method to manufacture the mold |
| US9038252B2 (en) | 2006-08-30 | 2015-05-26 | Lear Corporation | Vehicle seat assembly having a hardness gradient via surface intrusions and/or protrusions |
| US9421895B2 (en) | 2006-08-30 | 2016-08-23 | Lear Corporation | Vehicle seat assembly having a hardness gradient via “A” surface intrusions and/or protrusions |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0021191A2 (en) | 1981-01-07 |
| ES251483Y (en) | 1981-03-16 |
| BR8003787A (en) | 1981-01-13 |
| DE2924662A1 (en) | 1981-01-15 |
| EP0021191A3 (en) | 1981-02-11 |
| JPS564570A (en) | 1981-01-17 |
| AU5939080A (en) | 1981-01-08 |
| AU532480B2 (en) | 1983-09-29 |
| ES251483U (en) | 1980-10-01 |
| EP0021191B1 (en) | 1982-04-28 |
| DE3060337D1 (en) | 1982-06-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |