CA2004002C - Chairs - Google Patents
ChairsInfo
- Publication number
- CA2004002C CA2004002C CA 2004002 CA2004002A CA2004002C CA 2004002 C CA2004002 C CA 2004002C CA 2004002 CA2004002 CA 2004002 CA 2004002 A CA2004002 A CA 2004002A CA 2004002 C CA2004002 C CA 2004002C
- Authority
- CA
- Canada
- Prior art keywords
- seat
- chair
- user
- angle
- adjusting
- 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 - Fee Related
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
- A47C3/20—Chairs or stools with vertically-adjustable seats
- A47C3/28—Chairs or stools with vertically-adjustable seats with clamps acting on vertical rods
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C9/00—Stools for specified purposes
- A47C9/02—Office stools not provided for in main groups A47C1/00, A47C3/00 or A47C7/00; Workshop stools
- A47C9/025—Stools for standing or leaning against, e.g. in a semi-standing or half-seated position
Landscapes
- Chairs Characterized By Structure (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
- Special Chairs (AREA)
Abstract
A chair is provided with a seat which can support a user in both a sitting and semi-standing position, the seat being so shaped to provide a substantially horizontal surface for the user irrespective of the angle at which the seat is set.
Description
IMPROVEMENTS IN OR RELATING TO CHAIRS
The present invention relates to chairs and more particularly to chairs designed to be able to support the body of a human being (the user) at one or more heights.
Chairs are normally designed to support a user in a sitting position even though the height at which the user sits can be adjusted to suit users of different heights. Known adjustment systems comprise spring loaded central support columns or gas filled cylinder systems controlled by a lever adjacent the chair seat.
It is an object of the present invention to provide a chair with a seat which. can support a user in a sitting or a semi-standing position.
According to th.e present invention there is provided a chair for supporting a user in a sitting or semi-standing position including a seat, the seat providing a substantially horizontal uppermost surface for the user irrespective of the angle at which the seat is set. If cushioned the actual upper surface may be curved when not in use.
In particular, according to the present invention there is provided a chair comprising: a seat; a base structure supporting said seat; and means for adjusting said seat between two different positions in which it is held respectively at relativel.y lower and higher levels and at different inclinations suited to use in sitting and semi-standing postures; said seat being shaped to provide respectively different transversely extending, substantially horizontal portions of its upper surface for supporting the weight of a user at said positions; and in which said portions are each, when in their respective weight supporting positions, the highest position of the seat upper surface and are disposed in a vertical plane passing through said base structure.
Preferably the horizontal surface comprises at lea~t a thin line running transversely on -the seat surface forming the highest portion of the seat, this line lying in a vertical plane passing through a base structure of the chair. When the seat angle is adjusted this line, in a preferred embodiment, remains substantially in the same vertical plane relative to the base of the chair.
Embodiments of the present invention will now be described, by way of example with reference to the accompanying drawings, in which:-Figure 1 shows schematically a chair according tothe present invention;
Figure 2 shows a perspective view of a first seat according to the present invention suitable for the chair of Figure 1;
Figure 3 shows a plan view of one half of the seat of Figure 2;
Figure ~ shows a cross-section of the seat of Figure 3 on line A-A;
The present invention relates to chairs and more particularly to chairs designed to be able to support the body of a human being (the user) at one or more heights.
Chairs are normally designed to support a user in a sitting position even though the height at which the user sits can be adjusted to suit users of different heights. Known adjustment systems comprise spring loaded central support columns or gas filled cylinder systems controlled by a lever adjacent the chair seat.
It is an object of the present invention to provide a chair with a seat which. can support a user in a sitting or a semi-standing position.
According to th.e present invention there is provided a chair for supporting a user in a sitting or semi-standing position including a seat, the seat providing a substantially horizontal uppermost surface for the user irrespective of the angle at which the seat is set. If cushioned the actual upper surface may be curved when not in use.
In particular, according to the present invention there is provided a chair comprising: a seat; a base structure supporting said seat; and means for adjusting said seat between two different positions in which it is held respectively at relativel.y lower and higher levels and at different inclinations suited to use in sitting and semi-standing postures; said seat being shaped to provide respectively different transversely extending, substantially horizontal portions of its upper surface for supporting the weight of a user at said positions; and in which said portions are each, when in their respective weight supporting positions, the highest position of the seat upper surface and are disposed in a vertical plane passing through said base structure.
Preferably the horizontal surface comprises at lea~t a thin line running transversely on -the seat surface forming the highest portion of the seat, this line lying in a vertical plane passing through a base structure of the chair. When the seat angle is adjusted this line, in a preferred embodiment, remains substantially in the same vertical plane relative to the base of the chair.
Embodiments of the present invention will now be described, by way of example with reference to the accompanying drawings, in which:-Figure 1 shows schematically a chair according tothe present invention;
Figure 2 shows a perspective view of a first seat according to the present invention suitable for the chair of Figure 1;
Figure 3 shows a plan view of one half of the seat of Figure 2;
Figure ~ shows a cross-section of the seat of Figure 3 on line A-A;
2~ n~
Figure 5 shows a first cross-sectional front elevation of the seat of Figure 2;
Figure 6 shows diagrammatically the design of a second seat according to the present invention suitable for the chair of Figure 1;
Figure 7 shows diagrammatically the design of a third seat according to the present invention suitable for the chair of Figure 1;
Figure 8 shows a suitable adjustment mechanism for use with the chair of Figure 1 to provide an automatic tilting action for the seat;
Figure 9 shows in elevational partial cross section a practical embodiment of a chair incorporating a seat according to the present invention;
Figure 1~ shows a cross sectional view along line A-A of Figure 9; and Figure 11 shows a cross sectional view along line B-B of Figure 9.
With reference now to Figure 1, a chair 10 is shown diagrammatically. The chair comprises three basis component parts, a base 20, a seat 30 and a backrest 40 (if provided). The base 20 may be of the star or similar known type providing a stable base providing that the weight on the chair is within the area of the base. The backrest 40 (if fitted) may be attached to the seat in ~nown manner.
The seat 30 has an upper curved surface 32 and may be adjusted or set at a number of angles as shown by dotted lines 321, 322. Dotted line 321 is suitable for a higher position of the chair corresponding to a stand position for the user and dotted line 322 is suitable for a lower for the chair corresponding to a sitting position for the user.
In the present invention the highest "point" on the surface of the seat shown diagrammatically at 323 is sho~-n on the vertical dotted line 324. As the seat 30 is adjusted into the positions shown at 321 and 322 the highest "point" of the seat will in the seat desi~n according to the present invention still remain substantially on the line 324.
o~
Ln a practical seat design in three dimensions as opposed to the dia~rammatic representation shown in Figure 1 the line 324 is in fact a plane and the point on the seat comprises a horizontal line across the seat as indicated by line X-X in Figure 2 to which reference is now made.
The seats shown in Figures 2 to 7 are specifically designed such tha-t there is always an uppermost horizontal portion of the seat X-X to be sat on by the user for support at all heights within the designed height range.
The shape of seat 30 is shown in Figures 2 to 5 and with reference to Figure 4 the seat is contoured to provide an upper surface 31 the shape of which is dictated by three arcs of radii R1, R2 and R3 as shown. The seat is shaped to be narrower at t~e front as indicated by the cross-sectional shapes A'-A', B'-B' and C'-C' shown in Figure 5 and by the plan view of Fi~ure 3. With reference to figure 5, the seat shape could, however, be of the more conventional substantially rectangular shape as indicated by the dotted lines.
- With respect to the cross-sections the upper surface 31 of the seat need not necessarily be flat to form a completely horizon-tal surface but could be contoured by suitable upholstery to provide for e~ample a domed shape which may be more comfortable or a seat contoured to 2~ n~
accommodate the shape of the upper legs or thighs. The seat may be provided for example with a tensioned net or canvas sling stretched over a suitable frame.
In a particular embodiment the dimensions of the radii R1, R2 and R3 are as follows:-R1 - 140 mm R2 - 280 mm R3 - 350 mm These dimensions are given only by way of e~ample and may be varied to suit specific requirements.
With reference now to Figure 6 a simpler contour for the seat is shown comprisin~ two arcs of radii R4 and R5 as shown. Radius R4 is the shorter and is used as indicated by the solid line to form the bac~ of the seat and R5 is the longer and is used to form the front of the seat as shown by -the solid line. The dotted continuation lines of arc are only shown to illustrate the differences in -the radii. The seat is pivoted about point P to achieve the desired property of maintaining an uppermost horizontal line ~-~ to sit on at all angles of pivot of the seat.
- ~0~)40~
A modification of the sea-t con-tour of Figure 6 is shown in Fi~ure 7, the radius R5 being replaced by a tangential shape as indicated by the straight line R, radius R5 being shown dotted ~or comparison.
In a practical embodiment R4 = 140 mm and R5 =
200 mm.
The seat shapes shown may be set at fixed angles for various types of seat and they will always provide an uppermost substantially horizontal line X-X for the user to sit on. In practise this line will, in an upholstered or padded seat provide a generally horizontal platform sloping at its extremities both to the back and the front of the seat. Thus the user will not be unbalanced on the seat since there there will be no tendency to slide to the front or back of the seat. This is particularly advantageous since any such tendency is always resisted by a user causing strain. The seat desi~n according to the present invention is therefore comfortable to sit on at all heights at which is it set. Thus for example for laboratory stools the seat can be set for a high level use and for typing chairs it can be set at a low lever.
2~ )2 g If it is required to provide an automatic adjustment of the angle of the seat the embodiment of Figure 8 may be used. In Figure 8 -the upper part of a chair is shown and comprises the seat 30 pivoted on a pivot 35 attached to a main support member 25.
A first height adjustment is provided by for example a gas filled cylinder 200. This is used to adjust the seat for the height of the user ~or example at the lowest or sitting position by altering the height of ram 202.
Once set for a particular user this cylinder 200 would not be further altered.
A further cylinder 204 is positioned within ram 202 to provide further vertical movement of seat 30. To further alter the height of seat 30 cylinder 204 is activated by means of for example of a lever in known manner to allow main support member 25 to move upwardly under the force of the cylinder or downwardly under the weight of the user on the seat 30. As member 25 moves into or out of cylinder 204 so seat 30 is moved by an arm 36 connected in a pivotal manner between ram 202 and the front of the seat a-t pivot points 37, 38. The seat 30 will therefore move as indicated by dotted outline 30'.
1ine X-X (as indicated by the arrow X) will as shown always be at the highest point on the seat and in -this X00~i~S)2 embodiment this line is vertically above the main support member 25 providing the most suitable condition for the seat.
As an alternative to -the automatic adjustment provided by arm 36 a manual adjustment could be provided by a suitable screw clamp on pivot 35 allowing the seat to be rotated to suit the user. Line X-~ will however always be the highest portion of the seat.
With reference now to Figures 9 to 11 a practical embodiment of a chair incorporating a seat according to the present invention is shown.
The chair 100 comprises a base 1200 which may be of the conventional three or five star configuration. In the drawing only two feet 1202, 1204 are shown for simplicity of drawin~. A first main support member 1206 is fixed; for example by welding into the base 1200 and a second main support member 1208 is slidably mounted over the first member 1206 as shown. Pre~erably each support member 1206, 1208 comprises a steel tube of circular cross section.
20~ )2 Support member l208 is movable vertically relative to support member 1206 by means of a spring 1210 (which in a practical chair would be provided with a cover 1212 shown as a dotted line).
The two members are normally locked together by a lockin~ arrangemen-t 1214, 1216 which operates in known manner to allow relative movement between the members on compression of a spring 1~18. This is achieved by a downward movement of operating rod 1220 by downward operation of a lever 1222 which is situa-ted under the front of seat 30 (Figure 1). This movement is well known in such chair desi~ns and will not therefore be described in any greater detail. The lift provided for the chair seat by this arrangement is in the chair shown 120 mm ~approx. 5 inches) which accomodates for the sitting position height range. It is noted here that the angle of the seat 30 does not change due -to opera-tion of lever 1222.
The seat 30 is pivotally supported on a pin 1224 and tilting of the seat is accomplished by the pivotal connection of the front of the seat to a lever 1226 on a pivot pin 1228. The seat is supported on a platform 1230 which is mounted on a bearing 1232 which enables the seat to be revolved.
Z0~4~C~2 The seat 30 may be raisecl by opera-tion o~ a lever 1234 into the position shown partially at 301 and 12261.
The lever 1234 operates when depressed to release the piston 1236 and allow the seat to rise (in known manner) under the pressure provided by either a pneumatic pressure or by a further spring (not shown). The seat may be lowered by operating the lever 1234 and pressin~
down on the top of the seat.
The operation of the seat may be clearly seen by the two posi-tions 30, 1226 and 301, 12261. As the piston 1236 rises the upper portion 1240 of the platform 1230 rises relative to the base portion 1242 to which the opposite end of lever 1226 is pivotally connected at pivot point 1244. Thus as the seat rises the angle of the seat is tilted gradually, the seat always having a horizontal portion to support the user.
A backrest 1246, 124~ is also attached to the upper part 1240 of the platform 1230 so that -the backrest rises with the seat,
Figure 5 shows a first cross-sectional front elevation of the seat of Figure 2;
Figure 6 shows diagrammatically the design of a second seat according to the present invention suitable for the chair of Figure 1;
Figure 7 shows diagrammatically the design of a third seat according to the present invention suitable for the chair of Figure 1;
Figure 8 shows a suitable adjustment mechanism for use with the chair of Figure 1 to provide an automatic tilting action for the seat;
Figure 9 shows in elevational partial cross section a practical embodiment of a chair incorporating a seat according to the present invention;
Figure 1~ shows a cross sectional view along line A-A of Figure 9; and Figure 11 shows a cross sectional view along line B-B of Figure 9.
With reference now to Figure 1, a chair 10 is shown diagrammatically. The chair comprises three basis component parts, a base 20, a seat 30 and a backrest 40 (if provided). The base 20 may be of the star or similar known type providing a stable base providing that the weight on the chair is within the area of the base. The backrest 40 (if fitted) may be attached to the seat in ~nown manner.
The seat 30 has an upper curved surface 32 and may be adjusted or set at a number of angles as shown by dotted lines 321, 322. Dotted line 321 is suitable for a higher position of the chair corresponding to a stand position for the user and dotted line 322 is suitable for a lower for the chair corresponding to a sitting position for the user.
In the present invention the highest "point" on the surface of the seat shown diagrammatically at 323 is sho~-n on the vertical dotted line 324. As the seat 30 is adjusted into the positions shown at 321 and 322 the highest "point" of the seat will in the seat desi~n according to the present invention still remain substantially on the line 324.
o~
Ln a practical seat design in three dimensions as opposed to the dia~rammatic representation shown in Figure 1 the line 324 is in fact a plane and the point on the seat comprises a horizontal line across the seat as indicated by line X-X in Figure 2 to which reference is now made.
The seats shown in Figures 2 to 7 are specifically designed such tha-t there is always an uppermost horizontal portion of the seat X-X to be sat on by the user for support at all heights within the designed height range.
The shape of seat 30 is shown in Figures 2 to 5 and with reference to Figure 4 the seat is contoured to provide an upper surface 31 the shape of which is dictated by three arcs of radii R1, R2 and R3 as shown. The seat is shaped to be narrower at t~e front as indicated by the cross-sectional shapes A'-A', B'-B' and C'-C' shown in Figure 5 and by the plan view of Fi~ure 3. With reference to figure 5, the seat shape could, however, be of the more conventional substantially rectangular shape as indicated by the dotted lines.
- With respect to the cross-sections the upper surface 31 of the seat need not necessarily be flat to form a completely horizon-tal surface but could be contoured by suitable upholstery to provide for e~ample a domed shape which may be more comfortable or a seat contoured to 2~ n~
accommodate the shape of the upper legs or thighs. The seat may be provided for example with a tensioned net or canvas sling stretched over a suitable frame.
In a particular embodiment the dimensions of the radii R1, R2 and R3 are as follows:-R1 - 140 mm R2 - 280 mm R3 - 350 mm These dimensions are given only by way of e~ample and may be varied to suit specific requirements.
With reference now to Figure 6 a simpler contour for the seat is shown comprisin~ two arcs of radii R4 and R5 as shown. Radius R4 is the shorter and is used as indicated by the solid line to form the bac~ of the seat and R5 is the longer and is used to form the front of the seat as shown by -the solid line. The dotted continuation lines of arc are only shown to illustrate the differences in -the radii. The seat is pivoted about point P to achieve the desired property of maintaining an uppermost horizontal line ~-~ to sit on at all angles of pivot of the seat.
- ~0~)40~
A modification of the sea-t con-tour of Figure 6 is shown in Fi~ure 7, the radius R5 being replaced by a tangential shape as indicated by the straight line R, radius R5 being shown dotted ~or comparison.
In a practical embodiment R4 = 140 mm and R5 =
200 mm.
The seat shapes shown may be set at fixed angles for various types of seat and they will always provide an uppermost substantially horizontal line X-X for the user to sit on. In practise this line will, in an upholstered or padded seat provide a generally horizontal platform sloping at its extremities both to the back and the front of the seat. Thus the user will not be unbalanced on the seat since there there will be no tendency to slide to the front or back of the seat. This is particularly advantageous since any such tendency is always resisted by a user causing strain. The seat desi~n according to the present invention is therefore comfortable to sit on at all heights at which is it set. Thus for example for laboratory stools the seat can be set for a high level use and for typing chairs it can be set at a low lever.
2~ )2 g If it is required to provide an automatic adjustment of the angle of the seat the embodiment of Figure 8 may be used. In Figure 8 -the upper part of a chair is shown and comprises the seat 30 pivoted on a pivot 35 attached to a main support member 25.
A first height adjustment is provided by for example a gas filled cylinder 200. This is used to adjust the seat for the height of the user ~or example at the lowest or sitting position by altering the height of ram 202.
Once set for a particular user this cylinder 200 would not be further altered.
A further cylinder 204 is positioned within ram 202 to provide further vertical movement of seat 30. To further alter the height of seat 30 cylinder 204 is activated by means of for example of a lever in known manner to allow main support member 25 to move upwardly under the force of the cylinder or downwardly under the weight of the user on the seat 30. As member 25 moves into or out of cylinder 204 so seat 30 is moved by an arm 36 connected in a pivotal manner between ram 202 and the front of the seat a-t pivot points 37, 38. The seat 30 will therefore move as indicated by dotted outline 30'.
1ine X-X (as indicated by the arrow X) will as shown always be at the highest point on the seat and in -this X00~i~S)2 embodiment this line is vertically above the main support member 25 providing the most suitable condition for the seat.
As an alternative to -the automatic adjustment provided by arm 36 a manual adjustment could be provided by a suitable screw clamp on pivot 35 allowing the seat to be rotated to suit the user. Line X-~ will however always be the highest portion of the seat.
With reference now to Figures 9 to 11 a practical embodiment of a chair incorporating a seat according to the present invention is shown.
The chair 100 comprises a base 1200 which may be of the conventional three or five star configuration. In the drawing only two feet 1202, 1204 are shown for simplicity of drawin~. A first main support member 1206 is fixed; for example by welding into the base 1200 and a second main support member 1208 is slidably mounted over the first member 1206 as shown. Pre~erably each support member 1206, 1208 comprises a steel tube of circular cross section.
20~ )2 Support member l208 is movable vertically relative to support member 1206 by means of a spring 1210 (which in a practical chair would be provided with a cover 1212 shown as a dotted line).
The two members are normally locked together by a lockin~ arrangemen-t 1214, 1216 which operates in known manner to allow relative movement between the members on compression of a spring 1~18. This is achieved by a downward movement of operating rod 1220 by downward operation of a lever 1222 which is situa-ted under the front of seat 30 (Figure 1). This movement is well known in such chair desi~ns and will not therefore be described in any greater detail. The lift provided for the chair seat by this arrangement is in the chair shown 120 mm ~approx. 5 inches) which accomodates for the sitting position height range. It is noted here that the angle of the seat 30 does not change due -to opera-tion of lever 1222.
The seat 30 is pivotally supported on a pin 1224 and tilting of the seat is accomplished by the pivotal connection of the front of the seat to a lever 1226 on a pivot pin 1228. The seat is supported on a platform 1230 which is mounted on a bearing 1232 which enables the seat to be revolved.
Z0~4~C~2 The seat 30 may be raisecl by opera-tion o~ a lever 1234 into the position shown partially at 301 and 12261.
The lever 1234 operates when depressed to release the piston 1236 and allow the seat to rise (in known manner) under the pressure provided by either a pneumatic pressure or by a further spring (not shown). The seat may be lowered by operating the lever 1234 and pressin~
down on the top of the seat.
The operation of the seat may be clearly seen by the two posi-tions 30, 1226 and 301, 12261. As the piston 1236 rises the upper portion 1240 of the platform 1230 rises relative to the base portion 1242 to which the opposite end of lever 1226 is pivotally connected at pivot point 1244. Thus as the seat rises the angle of the seat is tilted gradually, the seat always having a horizontal portion to support the user.
A backrest 1246, 124~ is also attached to the upper part 1240 of the platform 1230 so that -the backrest rises with the seat,
Claims (6)
1. A chair comprising:
a seat;
a base structure supporting said seat; and means for adjusting said seat between two different positions in which it is held respectively at relatively lower and higher levels and at different inclinations suited to use in sitting and semi-standing postures;
said seat being shaped to provide respectively different transversely extending, substantially horizontal portions of its upper surface for supporting the weight of a user at said positions;
and in which said portions are each, when in their respective weight supporting positions, the highest position of the seat upper surface and are disposed in a vertical plane passing through said base structure.
a seat;
a base structure supporting said seat; and means for adjusting said seat between two different positions in which it is held respectively at relatively lower and higher levels and at different inclinations suited to use in sitting and semi-standing postures;
said seat being shaped to provide respectively different transversely extending, substantially horizontal portions of its upper surface for supporting the weight of a user at said positions;
and in which said portions are each, when in their respective weight supporting positions, the highest position of the seat upper surface and are disposed in a vertical plane passing through said base structure.
2. A chair as claimed in claim 1 in which the seat is provided with pivot means, the pivot means being operative to allow the angle of the seat to be adjusted.
3. A chair as claimed in claim 1 or claim 2 in which the seat has an upper surface, the upper surface being cushioned, the cushioning providing a curved surface when not in use.
4. A chair as claimed in claim 1 in which the vertical plane remains substantially in the same position relative to the base structure of the chair at each angular position of the seat.
5. A chair as claimed in any one of claims 1, 2 or 4 in which there is provided:
a seat;
co-operative means for adjusting an angle of tilt of said seat so as to accommodate needs of said user in any position in said range, said co-operative means providing forward and backward rotation of said seat as said seat is raised or lowered by said means for adjusting said seat between two different positions in order to alter said angle of said seat such that legs of said user in said semi-standing position are clear of a front portion of said seat.
a seat;
co-operative means for adjusting an angle of tilt of said seat so as to accommodate needs of said user in any position in said range, said co-operative means providing forward and backward rotation of said seat as said seat is raised or lowered by said means for adjusting said seat between two different positions in order to alter said angle of said seat such that legs of said user in said semi-standing position are clear of a front portion of said seat.
6. A chair as claimed in claim 3 in which there is provided:
a seat;
co-operative means for adjusting an angle of tilt of said seat so as to accommodate needs of said user in any position in said range, said co-operative means providing forward and backward rotation of said seat as said seat is raised or lowered by said means for adjusting said seat between two different positions in order to alter said angle of said seat such that legs of said user in said semi-standing position are clear of a front portion of said seat.
a seat;
co-operative means for adjusting an angle of tilt of said seat so as to accommodate needs of said user in any position in said range, said co-operative means providing forward and backward rotation of said seat as said seat is raised or lowered by said means for adjusting said seat between two different positions in order to alter said angle of said seat such that legs of said user in said semi-standing position are clear of a front portion of said seat.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB888827846A GB8827846D0 (en) | 1988-11-29 | 1988-11-29 | Improvements in/relating to chairs |
| GB8827846.0 | 1988-11-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2004002A1 CA2004002A1 (en) | 1990-05-29 |
| CA2004002C true CA2004002C (en) | 1999-06-22 |
Family
ID=10647648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2004002 Expired - Fee Related CA2004002C (en) | 1988-11-29 | 1989-11-28 | Chairs |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0371729B1 (en) |
| CA (1) | CA2004002C (en) |
| DE (1) | DE68918921T2 (en) |
| ES (1) | ES2064464T3 (en) |
| GB (2) | GB8827846D0 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9107661D0 (en) * | 1991-04-11 | 1991-05-29 | Nat Res Dev | Adjustable chair |
| GB2354434A (en) * | 1999-09-20 | 2001-03-28 | Benjamin Jasper Dobson | Compression relief seat for persons |
| DE10007103B4 (en) | 2000-02-16 | 2004-01-29 | Wolfgang Deisig | Adjustable work chair, especially office chair |
| GB2483876A (en) * | 2010-09-22 | 2012-03-28 | Nicholas David Le Sueur | Seat height adjustment mechanism |
| GB201110748D0 (en) | 2011-06-24 | 2011-08-10 | Freedman Simon A | A seat |
| CN106175230A (en) * | 2016-07-01 | 2016-12-07 | 卓达新材料科技集团威海股份有限公司 | Inclined-plane arm-chair |
| DE202018100807U1 (en) | 2018-02-14 | 2018-04-03 | Kinema Gmbh | Seating and support furniture |
| DE102018103322A1 (en) * | 2018-02-14 | 2019-08-14 | Kinema Gmbh | Seating and support furniture |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4529247A (en) * | 1982-04-15 | 1985-07-16 | Herman Miller, Inc. | One-piece shell chair |
| FR2552988B1 (en) * | 1983-10-10 | 1986-03-21 | Savigny Francois | VERSATILE SEAT GIVING A MID-SEAT, MID-KNEE STATION |
| US4552404A (en) * | 1983-10-12 | 1985-11-12 | Congleton Jerome J | Neutral body posture chair |
| SE449688B (en) * | 1984-10-17 | 1987-05-18 | Liedberg Ostlund Ab | WORK CHAIR WITH SWINGING BACKGROUND |
| GB2205737B (en) * | 1987-05-23 | 1991-04-03 | Nat Res Dev | Improvements in or relating to chairs |
-
1988
- 1988-11-29 GB GB888827846A patent/GB8827846D0/en active Pending
-
1989
- 1989-11-27 DE DE1989618921 patent/DE68918921T2/en not_active Expired - Fee Related
- 1989-11-27 GB GB8926725A patent/GB2226756B/en not_active Expired - Lifetime
- 1989-11-27 ES ES89312290T patent/ES2064464T3/en not_active Expired - Lifetime
- 1989-11-27 EP EP19890312290 patent/EP0371729B1/en not_active Expired - Lifetime
- 1989-11-28 CA CA 2004002 patent/CA2004002C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| GB8926725D0 (en) | 1990-01-17 |
| CA2004002A1 (en) | 1990-05-29 |
| GB8827846D0 (en) | 1988-12-29 |
| DE68918921D1 (en) | 1994-11-24 |
| GB2226756B (en) | 1992-09-02 |
| DE68918921T2 (en) | 1995-02-23 |
| ES2064464T3 (en) | 1995-02-01 |
| GB2226756A (en) | 1990-07-11 |
| EP0371729B1 (en) | 1994-10-19 |
| EP0371729A3 (en) | 1990-08-22 |
| EP0371729A2 (en) | 1990-06-06 |
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