Adjustable configuration seating
The adjustable configuration seating has a pair of opposed lateral rigid frame members with a continuous web or sling type seat and back panel extending therebetween. The seat and back panel is secured in place between the two frame members by a series of crossmembers extending between the frame members, with a single adjustably positionable tension crossmember also extending between the frame members to hold the seat and back panel taut. Conversion between relatively upright and reclining configurations is accomplished by repositioning the tension crossmember between the frames, and turning the assembly ninety degrees to position the selected seating surface to face generally upwardly. The seating surface for the other configuration is a separate side or surface of the seating web or sling. The seat may be folded by hinging the crossmembers together and folding the web or sling between the two frame members as they are drawn together.
1. Field of the Invention
The present invention relates generally to adjustable chairs and seating. More particularly, the adjustable configuration seating is a dual configuration chair having web or sling type seating and back panels which may be quickly and easily converted from a generally upright seating position using one side of the seating and back panels, to a more reclined seating position using the opposite side of the seating and back panels.
2. Description of the Related Art
The desirability and need for chairs and seating surfaces having multiple configurations has been recognized for some time. Seating which is convertible between a relatively upright position and a reclining position is desirable due to its versatility and the ability to combine two (or more) different types of seating configurations into a single unit, thereby saving space and expense.
Most such adjustable configuration chairs or seats are relatively large, heavy, and immobile units, offering excellent comfort but also being relatively heavy and bulky. Lighter weight and more compact chairs have also been manufactured which provide portability for camping, beach use, etc. Most such portable seating is foldable for compact storage and transport, and many of these portable chairs are also convertible between relatively upright and reclining positions, as desired. However, all such convertible and portable chairs of which the present inventor is aware require some articulation of the lateral frame members, which results in a weaker frame than is achievable in a rigid, fixed structure. Moreover, none of the chairs and seats known to the present inventor makes use of both sides of a web or sling seating panel.
An example of such a chair is described in the drawings and English abstract of Swiss Patent No. 662,258, published on Sep. 30, 1987, which describes a folding chair that is convertible between relatively upright reclining positions by means of the articulation of the lateral frame assemblies.
Another folding chair is shown in Japanese Patent No. 6-98,816, published on Apr. 12, 1994. This chair is formed of relatively thick support and seating components, with a generally U-shaped back portion having a relatively shallow depth. The seat folds into the back portion between the shallow arms, with the forward portions of the sides and arms folding inwardly across the front of the assembly.
Another portable, folding seat is found in Japanese Patent No. 6-197,821, published on Jul. 19, 1994. This device has a configuration somewhat like that of a so-called “director's chair,” in which the legs are diagonally braced. The upper ends of the diagonals have collars that slide along the four uprights, allowing the uprights to be drawn together for folding the chair. This chair appears to have only a single seating configuration when deployed for use.
None of the above inventions and patents, taken either singly or in combination, is seen to describe the instant invention as claimed. Thus, adjustable configuration seating solving the aforementioned problems is desired.
SUMMARY OF THE INVENTIONThe adjustable configuration seating is convertible between relatively upright and reclining configurations. Two opposed lateral frames are used to support a continuous, flexible web or sling type seating and back panel therebetween. The lateral frames are rigid, rectangular units, and do not fold, articulate, or disassemble in any way. The seating web or sling is tautly secured between the two frames by a series of seating panel support crossmembers and a single tension crossmember. Conversion between the two seating configurations is accomplished by moving the lateral tension crossmember from a first to a second location across the two frames, thereby altering the path of the seating web or sling between the two frames. The entire assembly is then rotated ninety degrees to position the selected seating surface to face generally upwardly, with the'seating surface for the other configuration positioned generally below the selected seating surface.
The present adjustable configuration seating may be folded for storage or transport by removing all of the lateral seating surface crossmembers and the single tension rod, thereby allowing the seating web or sling to be removed and the two frames to be placed together. The two lateral frames may include means for folding, if so desired, for even more compact storage and shipping. Alternatively, the seating surface support crossmembers may be provided with hinges or the like and means for locking the hinges rigidly when the chair is deployed. Folding is accomplished by unlocking the support crossmembers and removing the tension crossmember, thereby allowing the two frames to be drawn together and folding the seating surface therebetween. Additional versatility may be provided by elongating the crossmembers and widening the panel surfaces to provide seating for more than one person, and/or providing additional intermediate frame members for additional support between each seating panel, as desired.
These and other features of the present invention will become readily apparent upon further review of the following specification and drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Similar reference characters denote corresponding features consistently throughout the attached drawings.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTSThe present invention comprises various embodiments of a seating device having an adjustable or variable configuration, and also optionally providing for lateral folding or collapsing with the two lateral frame members remaining in their rigid, unfolded state. The seat or chair utilizes a web or sling member for the seating and back surfaces, with opposite sides or surfaces of the web or sling being used for the different seating configurations.
Each frame member 12a, 12b includes four sides, respectively 14a through 20a for the first frame member 12a, and 14b through 20b for the second frame member 12b. It will be noted that the sides 14a, 14b and 18a, 18b are somewhat shorter than the sides 16a, 16b and 20a, 20b. The sides of each frame member form four corners, respectively 22a through 28a for the first frame member 12a and 22b through 28b for the second frame member 12b. It is not absolutely essential that the corners 22a through 28b of the frame members be comprise acute corners as shown in the drawings; the corners may be rounded, beveled, chamfered, etc., as desired. The two frame members 12a, 12b may be formed of any suitable rigid and sturdy material, e.g., wood, metal, dense plastic, etc., or some composite combination thereof in either solid or hollow tubular form, as desired.
A series of seat and back panel retaining crossmembers extend between the two frame members 12a and 12b, and support a seat and back panel thereon. Each of the crossmembers may comprise a rigid, inflexible rod, bar, or tube, or may alternatively provide for folding, as desired. A first panel retaining or support crossmember 30 extends between the two second sides 16a, 16b of the two frames and generally medially between the two corners 22a, 24a and 22b, 24b, with a second panel retaining crossmember 32 extending between the two corners 28a, 28b of the frame members, and a third crossmember 34 extending between the two frame sides 18a, 18b, crossmember 34 being closer to corners 26a, 26b than corners 24a, 24b. A fourth, selectively positionable seat and back panel tensioning member 36 also extends between the two lateral frame members, with the tensioning member 36 installed between the fourth sides 20a, 20b of the frame members in the upright seating configuration of
A continuous, thin, flexible seat and back panel is secured to the various panel retaining crossmembers 30 through 34 and wraps partially around the tensioning member 36. The seat and back panel comprises three general portions. A first, large portion 38 extends from the first panel retaining crossmember 30, with a second, relatively short portion 40 extending from the second panel retaining crossmember 32 and a third large portion 42 extending from the third crossmember 34 and wrapping partially about the tension crossmember 36. The various panel portions 38, 40, and 42 are all joined together (e.g., stitched or bonded for fabrics, etc.) along a common lateral seam 44.
Any suitable thin, flexible, substantially inelastic (slight stretching may be acceptable) sheet material may be used to form the panel and its three portions 38 through 42 as desired, e.g., woven fabric; plastic; leather or metal screen or mesh; continuous, impervious sheet materials (plastic, leather, etc.); large gauge mesh materials (e.g., knitted or knotted cord or rope as in a hammock), etc., as desired. It will be noted that in the example illustrated in
In
Specifically, the first ply 42a, which was facing outwardly away from the tension member in the upright configuration of
It will be noted that the chair or seating 10 of
As this crossmember 32 serves as the uppermost structural member of the seating 10 to support the upper edge of the backrest panel 40 in both seating configurations, the cushion 46 need only be flipped over from one side of the backrest panel 40 to the other as the chair configuration is changed, to provide a head or upper back cushion in either configuration. Alternatively, the cushion 46 may be flipped to the unused surface of the backrest panel, if the user of the seating 10 does not wish to use the cushion or the cushion may be removed completely by opening the attachment straps 50 securing it to the crossmember 32, if so desired. While the cushion 46 may serve primarily as a head or upper back cushion, it will be seen that it may be secured about either of the other two crossmembers 30 or 34 for use thereon, if so desired.
While the two lateral frame members 12a and 12b do not fold, collapse, or articulate in any manner, the present adjustable configuration seating may be constructed to provide laterally inwardly folding or collapsing of the crossmember structure for compact storage, if so desired.
However, the panel retaining members 30 through 34 may be constructed with end hinges 30a, 30b, 32a, 32b, and 34a, 34b for the respective frame 12a, 12b attachment ends of the three crossmembers 30 through 34. Central hinges 30c, 32c, and 34c are also provided respectively along each of the crossmembers 30 through 34, to permit them to fold or collapse inwardly, thereby allowing the frames 12a and 12b to draw together for compact storage of the seating unit 10. Examples of hinges and pivots which may be used with the present seating are shown and described in U.S. Pat. No. 4,715,650 issued on Dec. 29, 1987 to Cary Berman et al., titled “Fully Collapsible Portable Chair,” which is hereby incorporated by reference in its entirety. Locking sleeves 60 (shown most clearly in
The seating assembly in
The various panel portions are illustrated as single thicknesses in the embodiment of
In
Simultaneously with the above, the second crossmember 32, which supports the upper edge of the back panel 40, is hinging forwardly, with its central hinge 32c moving toward the plane between the two forward edges 16a and 16b of the two frame members 12a, 12b. This results in the upper edge of the back panel 40 forming an inwardly V-shaped fold, while its lower edge, i.e., the edge along the panel assembly seam 44, folds downwardly, as indicated in
At the same time, the third crossmember 34 is folding, with its central hinge 34c moving forwardly and passing slightly beyond the plane defined by the two lower sides 18a and 18b of the two lateral frames 12a and 12b. This results in the lower, outer portions of the first face 42b of the third panel 42 folding to face outwardly, with the remainder of the first face 42b of the third panel 42 folding inwardly to capture the rearward portion of the first panel 38 therebetween. The result is a compactly folded structure with the two lateral frames 12a and 12b disposed closely adjacent and parallel to one another, separated only by the thicknesses of the folded crossmembers 30 through 34 and the thickness of the folded panel portions 38 through 42, as shown in
The present adjustable configuration seating in its various embodiments provides a quite comfortable, compactly storable, and versatile seating arrangement. Even more comfort may be achieved by providing one or more cushions, which not only cushion the seating, but may also add some additional support as well.
The ties 66 or the like enable the entire assembled series of cushions 62a through 62c to be flipped over from one side of the seating surface to the other when the seating unit is converted from one configuration to the other. Alternatively, the cushion 62a may be equipped with a pair of crossmember attachment loops, e.g. loops 50 as shown with the single cushion 46 of
Each cushion 62a through 62c also preferably includes some means for securing the cushions to one another along their mating edges. For example, the mating edges of the cushions may be provided with mating zipper teeth, e.g., 68a along one edge of the first cushion 62a and 68b along the mating edge of the second cushion 62b. The opposite edge of the second cushion 62b may be provided with zipper teeth or other attachment means 68a identical to the attachment 68a of the first cushion 62a, with the third cushion 62c having attachment means 68b along a mating edge. In this manner, two or more such cushions may be assembled together as desired, with the first cushion 62a attaching directly to the third cushion 62c, or other arrangements or configurations as desired.
The cushion assemblies may also be reversed to place the cushions in the opposite order from that shown in
For example, the smaller cushion 62c may be used separately as a lumbar support in either seating configuration. Alternatively, the smaller cushion 62c may be secured to the intermediate or back cushion 62a, and folded over to double the thickness of the two cushions 62a and 62c along one edge thereof. The smaller cushion 62c, when placed along the upper edge of the back cushion 62a in this manner, serves as an upper shoulder or neck support, particularly when the seating is in the reclining configuration. Another alternative is the placement of the seat cushion 62b along the backrest area, for additional back support. The smaller cushion may be attached to the seat cushion 62b and used in the manner described immediately above, if so desired. It should be noted that the above described cushion arrangements are not limiting, but are merely examples of a vast array of configurations and arrangements that may be formed.
In conclusion, the present adjustable configuration seating in its various embodiments provides superior versatility for different seating configurations and storage, in comparison to conventional seating. The present seating may be constructed to provide relatively light weight for portability, yet provides a sturdy and solid structure by means of its rigid lateral members. The structure of the present seating is relatively economical, thus providing for use in many environments where large numbers of durable yet comfortable chairs or seating must be provided, e.g., resorts, hotels and motels, etc.
The unique concept that gives this seating its ability to convert from use for relaxing, e.g. living room, terrace or poolside, etc., to use for dining or other more upright seating environment, is the precise calculation of the lengths of the three portions of the flexible seating surface in combination with the two precise locations of the tension bar across the assembly. This precise combination of lengths and placements determines the important seat angles and depths of each position for maximum comfort while being used for the desired purpose. For relaxing, the seat back is at a more reclined angle, the seat bottom slopes down at the back, and the depth of the seat is deeper. For dining or other more formal, upright seating, the seat back is more erect, the seat bottom is more horizontal, and the seat depth is shorter.
The adjustable configuration seating provides a change in the height of the seating position due to the rotation of the frame during the configuration change. This provides a higher and more upright seating position compatible with a conventional table or the like, e.g., for dining, desk work or any other situation requiring upright seating, while providing a lower, more reclined seating position and orientation due to the lower frame disposition when the present seat is in its reclining configuration.
The present seating will also find favor among dorm students and owners and renters of studio apartments or other small quarters, as the versatility enables the present seating to serve dual purposes or functions while requiring no more room than a single small conventional chair. Even greater versatility may be provided by elongating the crossmembers and widening the panel surfaces to provide seating for more than one person, and/or providing additional intermediate frame members for additional support between each seating panel. Accordingly, the present seating in its various embodiments will prove to be extremely popular among a great number of people of different needs and backgrounds.
It is to be understood that the present invention is not limited to the embodiments described above, but encompasses any and all embodiments within the scope of the following claims.
Claims
1. Adjustable configuration seating, comprising:
- a first and a second rigid lateral frame member;
- a plurality of seat and back panel retaining crossmembers extending between said first and said second frame member;
- a rigid seat and back panel tensioning member repositionably extending between said first and said second frame member; and
- a continuous, thin, flexible seat and back panel secured to said seat and back panel retaining crossmembers and extending about said seat and back panel tensioning member, said seat and back panel having a first configuration seating surface and a second configuration seating surface separate from said first configuration seating surface.
2. The adjustable configuration seating according to claim 1, wherein each of said seat and back panel retaining crossmembers further includes:
- a first end pivotally attached to said first frame member;
- a second end pivotally attached to said second frame member; and a central hinge connecting the first and second end, said seat and back panel folding when said seat and back panel tensioning member is removed from between each said frame member and said seat and back panel retaining members are folded together to draw said first and said second frame member together.
3. The adjustable configuration seating according to claim 1, further including at least one cushion selectively attached to one said seating surface.
4. The adjustable configuration seating according to claim 3, wherein said at least one cushion comprises a plurality of mutually selectively attached cushions.
5. The adjustable configuration seating according to claim 1, wherein said seat and back panel comprises:
- a first ply having said first seating surface disposed thereon; and
- a second ply having said second seating surface disposed thereon.
6. The adjustable configuration seating according to claim 1, wherein said seat and back panel comprises a single ply having said first and said second seating surface disposed separately from one another thereupon.
7. The adjustable configuration seating according to claim 1, further including a selectively attached armrest accessory.
8. Adjustable configuration seating, comprising:
- a first and a second rigid lateral frame member;
- a plurality of seat and back panel retaining crossmembers extending between said first and said second frame member, each of said seat and back panel retaining crossmembers having: a first end pivotally attached to said first frame member; a second end pivotally attached to said second frame member; and a central hinge connecting the first and second ends;
- a rigid seat and back panel tensioning member removably extending between said first and said second frame member; and
- a continuous, thin, flexible, and folding seat and back panel secured to said seat and back panel retaining crossmembers and extending about said seat and back panel tensioning member, said seat and back panel folding when said seat and back panel tensioning member is removed from between each said frame member and said seat and back panel retaining members are folded together to draw said first and said second frame member together.
9. The adjustable configuration seating according to claim 8, wherein said rigid seat and back panel tensioning member is repositionably disposed between said first and said second frame member, said seat and back panel further including:
- a first configuration seating surface; and
- a second configuration seating surface separate from said first configuration seating surface.
10. The adjustable configuration seating according to claim 9, further including at least one cushion selectively attached to one said seating surface.
11. The adjustable configuration seating according to claim 10, wherein said at least one cushion comprises a plurality of mutually selectively attached cushions.
12. The adjustable configuration seating according to claim 8, wherein said seat and back panel includes:
- a first ply having said first seating surface disposed thereon; and
- a second ply having said second seating surface disposed thereon.
13. The adjustable configuration seating according to claim 8, wherein said seat and back panel comprises a single ply having said first and said second seating surface disposed separately from one another thereupon.
14. The adjustable configuration seating according to claim 8, further including a selectively attached armrest accessory.
15. Adjustable configuration seating, comprising:
- a first and a second rigid lateral frame member;
- a plurality of seat and back panel retaining crossmembers extending between said first and said second frame member;
- a rigid seat and back panel tensioning member repositionably extending between said first and said second frame member; and
- a continuous, thin, flexible seat and back panel secured to said seat and back panel retaining crossmembers and extending about said seat and back panel tensioning member, said seat and back panel having a first seating surface and a second seating surface separate from said first configuration seating surface; and
- at least one cushion selectively attached to one said seating surface.
16. The adjustable configuration seating according to claim 15, wherein each of said seat and back panel retaining crossmembers further includes:
- a first end pivotally attached to said first frame member;
- a second end pivotally attached to said second frame member; and
- a central hinge connecting the first and second ends, said seat and back panel folding when said seat and back panel tensioning member is removed from between each said frame member and said seat and back panel retaining members are folded together to draw said first and said second frame member together.
17. The adjustable configuration seating according to claim 15, wherein said at least one cushion comprises a plurality of mutually selectively attached cushions.
18. The adjustable configuration seating according to claim 15, wherein said seat and back panel includes:
- a first ply having said first seating surface disposed thereon; and
- a second ply having said second seating surface disposed thereon.
19. The adjustable configuration seating according to claim 15, wherein said seat and back panel comprises a single ply having said first and said second seating surface disposed separately from one another thereupon.
20. The adjustable configuration seating according to claim 15, further including a selectively attached armrest accessory.
Type: Application
Filed: Mar 24, 2005
Publication Date: Sep 28, 2006
Inventor: Robert Rojas (Fort Lauderdale, FL)
Application Number: 11/087,641
International Classification: A47C 13/00 (20060101);