Stackable Chair
A chair according to the invention is provided. The chair preferably includes a substantially square seat. The seat includes four walls. Each of the walls preferably projects substantially perpendicularly downward from one side of the outer perimeter of the upper surface. Each of the walls preferably includes an interior surface and an exterior surface. Each of the walls preferably includes a stability tab mounted on the interior surface. The stability tab is adapted to engage at least a portion of a chair that is stacked immediately beneath the folding chair. The chair also preferably includes a first rigid portion that is pivotably attached to the seat at a first set of two contact points. The first rigid portion includes a backrest. The second rigid portion is pivotably attached to the seat at a second set of two contact points. Finally, the chair may include a pair of connectors. Each of the pair may be pivotably attached to the first rigid portion and pivotably attached to the second rigid portion.
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This invention relates to chairs. More specifically, this invention relates to increasing stackability of a folding chair or other suitable chair.
Many common, inexpensive chairs are constructed in a way that makes the chairs stackable. Stackability is desirable in a chair because it promotes more efficient storage and eases the movement of multiple chairs from one place to another. More specifically, the chairs, when stackable, may be moved en masse with a single device such as a dolly. As such, when the chairs are stackable on a dolly or other carrying device, a single operant can move many more chairs than he would typically be able to.
It would be desirable to make chairs that are more stackable—i.e., may be stacked in a more stable fashion—than conventional chairs.
It would also be desirable to make stackable chairs that may be stacked and moved with a dolly.
SUMMARY OF THE INVENTIONIt is an object of this invention to make chairs that are more stackable—i.e., may be stacked in a more stable fashion—than conventional chairs.
It is another object of this invention to make stackable chairs that may be stacked and moved with a dolly.
A chair seat according to the invention preferably includes a substantially square upper surface. The chair seat also preferably includes four walls. Each of the walls preferably projects substantially perpendicularly downward from one side of the outer perimeter of the upper surface. Each of the walls may include an interior surface and an exterior surface. Each of the walls preferably includes at least one stability tab mounted on the interior surface. The stability tab preferably is adapted to engage at least a portion of a chair that is stacked immediately beneath a chair of which the folding chair seat forms a part. Preferably, the stability tabs increase the stability of the stack of chairs. This increased stability allows the chairs to be moved more easily from place to place.
The objects and advantages of the invention will be apparent upon consideration of the following detailed description, taken in conjunction with the accompanying drawings, in which like reference characters refer to like parts throughout, and in which:
When folded for storage, chair 100 may preferably present seat 110 to a user. Seat 110 is preferably adapted for sitting at some predetermined height.
When stored, chair 100 may preferably be folded to form a relatively flat apparatus 200 as shown from a back view in
Tabs 312 may extend downwardly, and substantially perpendicularly with respect to the top surface of seat 310. Tabs 312 preferably may be used to promote stackability as shown in more detail in
When chairs 402 are stacked as shown in
It should be noted that to provide sufficient stability, it may be preferable to mount tabs on the interior surface of all four sides of the seat. It may be yet more preferable to mount at least two tabs on the interior surface of each side of the under portion of the seat, as shown in
Alternatively,
In certain embodiments of the invention, metal stability bar 602 may preferably be riveted or attached in some suitable fashion to plastic seat 610 in order to add stability to the seating surface of seat 610.
In yet other embodiments of the invention, the chair may not be a folding chair but may be some other suitable chair that requires additional stability when stacked, or when place in some other suitable configuration. In such embodiments, the principles of the invention may remain the same—i.e., the seat may include tabs projecting from the underside, said tabs which serve to engage a preferably raised upper portion (or just the upper portion) of the seat thereinbelow in the stack.
Thus, chairs that are adapted for relatively easier, and more stable, stacking have been provided. Persons skilled in the art will appreciate that the present invention can be practiced by other than the described embodiments, which are presented for purposes of illustration rather than of limitation, and the present invention is limited only by the claims which follow.
Claims
1. A folding chair comprising:
- a substantially square seat, said seat comprising four walls, each of said walls that projects substantially perpendicularly downward from one side of the outer perimeter of the upper surface, each of said walls that comprises an interior surface and an exterior surface, each of said walls that comprises a stability tab mounted on the interior surface, each of said stability tabs that is adapted to engage at least a portion of a chair that is stacked immediately beneath the folding chair;
- a first rigid portion that is pivotably attached to said seat at a first set of two contact points, said first rigid portion that comprises a backrest;
- a second rigid portion that is pivotably attached to said seat at a second set of two contact points; and
- a pair of connectors, each of the pair that comprises a first end pivotably attached to the first rigid portion and a second end pivotably attached to the second rigid portion.
2. The folding chair of claim 1 wherein the stability tab traverses a plane defined by a bottom edge of the four walls.
3. The folding chair of claim 1 said stability tab further adapted to engage at least a seat portion of a chair that is stacked immediately beneath the folding chair.
4. The folding chair of claim 1 said stability tab further adapted to engage an upper surface of a chair that is stacked immediately beneath the folding chair.
5. The folding chair of claim 1, said upper surface comprising a recessed top layer that is set back from the perimeter of the upper surface, said recessed top layer that is adapted to engage at least a portion of a chair that is stacked immediately above the folding chair.
6. The folding chair of claim 1, said walls that are joined to form an area enclosed on four sides by the walls and on one side by an underside of the seat.
7. A folding chair seat comprising:
- a substantially square upper surface; and
- four walls, each of said walls that project substantially perpendicularly downward from one side of the outer perimeter of the upper surface, each of said walls that comprises an interior surface and an exterior surface, each of said walls that comprises a stability tab mounted on the interior surface, each of said stability tabs that is adapted to engage at least a portion of a chair that is stacked immediately beneath a chair comprising the folding chair seat.
8. The folding chair seat of claim 7 wherein one end of each of the stability tabs traverses a plane defined by a bottom edge of the four walls.
9. The folding chair seat of claim 7 each of said stability tabs further adapted to engage at least a seat portion of a chair that is stacked immediately beneath the chair comprising the folding chair seat.
10. The folding chair seat of claim 7 each of said stability tab further adapted to engage an upper surface of a chair that is stacked immediately beneath a chair comprising the folding chair seat.
11. The folding chair seat of claim 7, said upper surface comprising a recessed top layer that is set back from the perimeter of the upper surface, said recessed top layer that is adapted to engage at least a portion of a chair that is stacked immediately above the chair comprising the folding chair seat.
12. The folding chair seat of claim 7, said walls that are joined to form an area enclosed on four sides by the walls and on one side by an underside of the seat.
Type: Application
Filed: May 15, 2007
Publication Date: Nov 20, 2008
Applicant: NATIONAL PUBLIC SEATING CORP. (Clifton, NJ)
Inventor: Barry Stauber (Spring Valley, NY)
Application Number: 11/748,545
International Classification: A47C 4/00 (20060101);