Chair tray

A versatile chair tray has a tray, a block joined to the tray, and a brace pivotally connected to the block. The block is supported on a horizontal portion of a chair arm, and the brace is placed against a vertical portion of the chair arm. Spring clips clamp the tray and block to the chair arm horizontal portion and the brace to the chair arm vertical portion. When the chair tray is not in use, the brace folds against the tray to enable several chair trays to be stacked in a neat and stable pile. In a modified embodiment, mushroom heads on the block and brace engage slots in the chair arm to secure the chair tray to the chair. The chair tray is suitable for use with chairs having many different arm designs.

BACKGROUND OF THE INVENTION 
1. Field of the Invention 
This invention pertains to furniture, and more particularly to trays that 
are removably attachable to chairs. 
2. Description of the Prior Art 
Various types of products have been developed to support food and beverages 
on a chair. Examples of such products may be seen in U.S. Pat. Nos. 
2,650,651; 3,025,103; 3,233,940; 3,586,368; and 4,003,598. 
Although the products of the foregoing patents are generally acceptable for 
their intended purposes, they nevertheless are not completely 
satisfactory. The trays of U.S. Pat. Nos. 2,650,651 and 3,586,368, for 
example, are limited to use with chairs having a particular style and size 
of wide flat arm. The attachment of the U.S. Pat. No. 3,025,103 requires a 
particular design for the chair legs. The multi-purpose arm of the U.S. 
Pat. No. 3,233,940, which is a permanent part of a chair, is too narrow to 
reliably hold a plate of food. The tray of the U.S. Pat. No. 4,003,598 is 
limited to use with chairs having double-tube arms. It is thus seen that 
the prior support products are custom designed to suit only certain 
chairs. 
A further disadvantage of many prior chair related products is their 
bulkiness. With but few exceptions, the prior products cannot be stored 
compactly with stacked chairs. In addition, the components that render the 
prior products bulky also tend to make them undesirably expensive. 
Thus, a need exists for improvements in products that are attachable to 
chairs. 
SUMMARY OF THE INVENTION 
In accordance with the present invention, a versatile chair tray is 
provided that can be readily attached to a greater number of different 
kinds of chairs than prior products. This is accomplished by apparatus 
that includes a block and a brace that support a tray on a chair arm. 
The tray has an upper surface that is generally flat. The block is joined 
to the tray lower surface. The brace is pivotally connected to the block. 
The brace is pivotable between a stored position whereat it lies in facing 
contact with the tray lower surface, and an operative position whereat the 
brace extends at generally a right angle to the tray lower surface. 
When the brace is in the stored position, the chair tray of the invention 
occupies a minimum of space. It can therefore be stored on the seat of a 
stacked chair without interfering with stacking. If desired, several chair 
trays can be stacked on top of each other in a neat and stable pile. 
The block is supported on the horizontal portion of an arm of a chair such 
that the tray is horizontal. The brace is placed against a vertical 
portion of the chair arm. A first spring clip is used to clamp the back 
end of the tray and block to the horizontal portion of the chair arm. A 
second spring clip clamps the free end of the brace to the vertical 
portion of the chair arm. The chair tray remains firmly in place to 
support plates, glasses, and other items placed on the tray. The chair 
tray is capable of being used on practically all known folding and outdoor 
chairs without difficulty. 
When it is desired to remove the chair tray from the chair, it is necessary 
merely to remove the two spring clips. The brace can then be pivoted to 
its stored position, and the chair tray can be put away. The spring clips 
can be stored with the chair tray, or they can be used for other purposes 
while the chair tray is not in use. 
In a modified embodiment of the invention, threaded fasteners rather than 
spring clips are used to secure the chair tray to the chair. That 
embodiment is particularly useful when the chair tray is to remain on the 
chair for an extended time. 
In a further modified embodiment, the block has a mushroom head formed on 
it. A similar mushroom head is formed on the brace. There is a first 
keyhole slot in the horizontal portion of the chair arm, and another 
keyhole slot in the vertical portion of the chair arm. The mushroom head 
on the block engages the slot on the arm horizontal portion, and the 
mushroom head on the brace engages the slot on the arm vertical portion to 
secure the chair tray to the chair. 
The method and apparatus of the invention, using a brace that is pivotally 
connected to a block that in turn is joined to a tray, thus combines ease 
of use with versatility. The chair tray is firmly securable to numerous 
types of chairs, even though the chairs have different designs for their 
arms. 
Other advantages, benefits, and features of the present invention will 
become apparent to those skilled in the art upon reading the detailed 
description of the invention.

DETAILED DESCTIPTION OF THE PREFERRED EMBODIMENT 
Although the disclosure hereof is detailed and exact to enable those 
skilled in the art to practice the invention, the physical embodiments 
herein disclosed merely exemplify the invention, which may be embodied in 
other specific structure. The scope of the invention is defined in the 
claims appended hereto. 
Referring to FIGS. 1-4, a chair tray 1 is illustrated that includes the 
present invention. The chair tray 1 is particularly useful for supporting 
items such as plates of food and beverage containers, not shown, on an 
outdoor chair 3. However, it will be understood that the invention is not 
limited to recreational use. 
The chair tray 1 is comprised of a flat tray 5 having an upper surface 7 
and a lower surface 9. The tray 5 has a front edge 11, a back edge 13, an 
inside edge 15, and an outside edge 17. As illustrated, a lip 18 extends 
around the tray edges 11, 13, 15, and 17. The lip 18 has a circular 
portion 20 near the front edge. 
On the lower surface 9 of the tray 5 is a block 19. The block 19 may be a 
separate piece joined to the tray. The block has an inside edge 21 that 
preferably is coplanar with the tray inside edge 15, and a back edge 23 
that is coplanar with the tray back edge 13. The block has a front edge 25 
that is located approximately 30 percent of the distance from the tray 
back edge to the tray front edge 11. 
Pivotally connected to the front edge 25 of the block 19 is a brace 29. In 
the illustrated construction, the connection between the block and the 
brace 29 is a living hinge 27. The living hinge 27 enables the brace to 
pivot between a stored position as shown in FIGS. 1 and 2, and an 
operative position as shown in FIGS. 3 and 4. When in the stored position, 
the brace is parallel to the tray 5, and the brace top surface 31 is in 
facing contact with the tray lower surface 9. When in the operative 
position, the brace is approximately 90 degrees to the tray. 
I have found that a chair tray 1 made of recycled polypoplene plastic 
material works very well. Satisfactory dimensions for the tray 5 include a 
length of approximately 12 inches, a width of approximately eight inches, 
and a thickness of approximately 0.5 inches. The block 19 may be 
approximately 0.5 inches thick, four inches long, and two inches wide. The 
living hinge 27 has a thickness of between approximately 0.03 inches and 
0.06 inches. If desired, one or more ribs, typically shown in phantom 
lines 33 in FIG. 2, can be fabricated on the panel lower surface 9. The 
ribs 33 would have a thickness approximately equal to that of the block 19 
and brace 29. 
In use, the bottom surface 35 of the block 19 is supported on the 
horizontal portion 36 of the arm 37 of the chair 3 such that the tray 5 is 
horizontal. The brace 19 is pivoted to the operative position, and its 
bottom surface 38 is placed against the vertical portion 39 of the chair 
arm 37. The jaws 42 of a first strong spring clip 41 are placed near the 
common corner 40 of the tray and block. The first spring clip 41 firmly 
clamps the tray and block to the chair arm horizontal portion 36. The jaws 
44 of a second spring clip 43 clamp the brace near its free end 45 to the 
chair arm vertical portion 39. In that manner, the chair tray 1 is firmly 
secured to the chair. 
The chair tray 1 is very versatile. The flat surfaces 35 and 38 of the 
block 19 and brace 29, respectively, enable the chair tray to adapt to 
chairs having numerous designs for their arms. Specifically, the chair 
tray works just as well with chairs having tubular arms as it does with 
chairs having flat arms such as those of the chair 3 illustrated in FIG. 
4. The pivotable nature of the brace 29 enables its free end 45 to contact 
the vertical portion of a chair arm even if the arm horizontal portion 
overhangs the vertical portion. Further, the spring clips adapt to chair 
arms of different designs without problem. If necessary, the jaws 42 and 
44 of the spring clips 41 and 43, respectively, can be curved to clear any 
bent-over edge of a flat chair arm. 
The chair tray 1 is removed from the chair 3 merely by removing the spring 
clips 41 and 43. The spring clips may be stored with the chair tray, or 
they may be used for different purposes until the chair tray is again 
needed for use. 
The beneficial nature of the chair tray 1 is further demonstrated in 
conjunction with FIG. 5. In FIG. 5, four chair trays 1A, 1B, 1C, and 1D 
are shown stacked in a neat pile that occupies a minimum of space. The 
chair trays 1A and 1B are reversed such that the bottom surfaces 35A and 
38A of the block 19A and brace 29A, respectively, are against the lower 
surface 9B of the chair trays 1B, and the bottom surfaces 35B and 38B of 
the block 19B and brace 29B, respectively, are against the lower surface 
9A of the chair tray 1A. Chair trays 1C and 1D are similarly arranged. In 
that manner, a number of chair trays can be stacked and bundled for stable 
and compact storage. 
FIG. 6 shows a modified embodiment of the invention. The chair tray 1' of 
FIG. 6 has a tray 5', block 19', and brace 29' that are generally similar 
to the corresponding components of the chair tray 1 of FIGS. 1-5. However, 
a hole is formed through the brace 29' near its free end 45'. A similar 
hole is formed in the tray 5' and block 19' near their common corner 40'. 
A screw 51 passes through the hole in the tray 5' and block 19' and is 
threaded into the horizontal portion 36 of the chair arm 37. A similar 
screw 52 passes through the hole in the brace 29' and is threaded into the 
arm vertical portion 39. The chair tray 1' is ideal when it is desired to 
secure a chair tray to a chair 3 for an extended time. 
Now turning to FIGS. 7-9, a further modified chair tray 53 has a tray 55, 
block 57, and brace 59 that are generally similar to the tray 5, block 19, 
and brace 29, respectively, of the chair tray 1 of FIGS. 1-5. On the 
bottom surface 60 and near the free edge 61 of the brace 59 is a mushroom 
head 63. There is a similar mushroom head 65 on the bottom surface 67 of 
the block 57 near the common corner 69 of the block and tray 55. The 
mushroom heads 63 and 65 may be molded integrally with the brace and 
block, respectively, or they may be separate components embedded in the 
brace and block. 
The chair 71 with which the chair tray 53 is used has a first keyhole slot 
73 in the horizontal portion 75 of the arm 77. There is a second keyhole 
slot 79 in the vertical portion 81 of the chair arm 77. 
The chair tray 53 is secured to the chair 71 by inserting the mushroom head 
65 in the keyhole slot 73 and the mushroom head 63 in the slot 79. The 
tray 55 is pushed horizontally fully in the direction of arrow 83, and the 
brace 59 is pushed fully downwardly. Those actions engage the mushroom 
heads in their associated slots and thereby secure the chair tray to the 
chair. Pushing the tray and brace in the reverse direction removes the 
chair tray from the chair. 
In summary, the results and advantages of outdoor chairs can now be more 
fully realized. The chair tray of the invention provides a temporary but 
sturdy surface on which to place food and drink items. This desirable 
result comes from using the combined functions of the pivotable brace and 
spring clips. The spring clips enable the chair tray to be very quickly 
secured to and removed from the chair. The brace and spring clip cooperate 
to enable the chair tray to accommodate numerous designs of chair arms. 
Because of this simple and clean design, the chair tray possesses the 
further advantage of being compactly stored. The design of the chair tray 
that utilizes alternate means for securing it to a chair possesses the 
same general advantages as the chair tray design that utilizes the spring 
clips. 
It will also be recognized that in addition to the superior performance of 
the chair tray of the invention, its construction is such as to be of very 
modest cost. Consequently, it is readily affordable as an important 
accessory to considerably more expensive outdoor chairs. Also, since the 
chair tray is made of a simple design and from rugged components, it will 
give a long service life with little or no maintenance. 
Thus, it is apparent that there has been provided, in accordance with the 
invention, a chair tray that fully satisfies the aims and advantages set 
forth above. While the invention has been described in conjunction with 
specific embodiments thereof, it is evident that many alternatives, 
modifications, and variations will be apparent to those skilled in the art 
in light of the foregoing description. Accordingly, it is intended to 
embrace all such alternatives, modifications, and variations as fall 
within the spirit and broad scope of the appended claims.