Adjustable vehicle sun shade

An adjustable vehicle sun shade is provided. The window shade comprises a flexible shade panel and attachment means such as hook, snaps, or fibrous hook and eye fasteners for quick and easy installation and de-installation of the panel to the inside of a vehicle window. The panel further comprises at least one drawstring adapted to adjust a linear dimension of the panel by the drawing in or the letting out of such drawstring. In a preferred embodiment, a sun shade having feature of the invention comprises a flexible shade panel having drawstrings disposed along each of its borders and one or two drawstrings disposed horizontally and vertically across its center.

BACKGROUND 
Vehicle sun shades can be of great value in minimizing heat buildup within 
a parked automobile or other vehicle during daylight hours. Sun shades can 
also be of great value in protecting a vehicle's interior from radiation 
damage. 
Flexible sun shades wherein the sun shades are prepared from a cloth-like 
material and which can be fastened in close proximity to the inside of the 
vehicle's window have the advantages over cardboard and other rigid and 
semi-rigid sun shades that they are easier to store when not in use and, 
if sized properly for all windows, they can block out nearly all of the 
sun's radiation. 
Examples of flexible sun shades can be found in the prior art. For example, 
U.S. Pat. No. 4,560,245 (issued to Sarver, 1985) discloses a flexible heat 
transfer inhibiting curtain for vehicles comprising a reflective, flexible 
sun shade which can be installed in close proximity to each of the 
vehicle's windows by knit, loop and hook-type fasteners or similar 
devices. 
Unfortunately, the Sarver device and all other known flexible vehicle sun 
shades suffer from the same fundamental problem that they are of fixed 
dimensions and must, therefore, be custom-fitted to each vehicle model 
window. This problem makes such flexible sun shades relatively expensive 
to manufacture and market. 
There is, therefore, a need for a flexible vehicle sun shade which is 
adjustable in its dimensions to allow it to be used in all sizes of 
windows. 
There is further a need for an adjustable vehicle sun shade which is simple 
and inexpensive to manufacture. 
There is still further a need for an adjustable vehicle sun shade which is 
relatively simple to operate and install. 
There is a still further need for an adjustable vehicle sun shade which is 
uniquely attractive when viewed from the exterior of the vehicle. 
SUMMARY OF THE INVENTION 
The present invention satisfies each of these needs. 
The invention is an adjustable vehicle sun shade comprising a flexible 
shade panel affixed to which are attachment means for quickly and easily 
installing and de-installing the panel to the inside of an automobile 
window. The panel further comprises at least one drawstring means which is 
adapted to adjust a linear dimension of the panel by the drawing in or the 
letting out of a drawstring. 
A single sun shade of the invention can be made to be adjustable to fit a 
windshield or rear window of almost any vehicle. Similarly, a sun shade of 
the invention can be made to fit any one of the side windows of almost any 
vehicle. 
In one practical embodiment, the invention comprises a quadrangular panel 
having drawstrings along each of the four sides, one drawstring 
horizontally disposed across the center of the panel and two parallel 
drawstrings spaced apart and disposed vertically across the central 
portion of the panel.

DESCRIPTION 
The invention is an adjustable vehicle sun shade 10. The sun shade 
comprises a flexible shade panel 12, attachment means 14 for attaching the 
shade panel to the inside of the vehicle, and drawstring means 16 adapted 
to adjust at least one linear dimension of the panel 12 by the drawing in 
or the letting out of a drawstring 80. 
The shade panel can be constructed of any of a variety of flexible 
materials. Cloth can be used. Also usable are certain flexible paper 
products, plastic films, and combinations of plastic and natural fiber 
compositions. For maximum sun protection, it is preferable that the 
flexible material have high heat and light reflectance properties. In a 
preferred embodiment of the invention, the shade panel is constructed of a 
metallic fabric or a fabric composed of a mixture of thread compositions 
including metallic threads. 
The shade panel 12 material must be sufficiently flexible to be 
size-reducible by the use of some form of drawstring. 
The shade panel 12 can be of a variety of shapes so long as the overall 
size of the shade panel 12 is larger than the vehicle window with which it 
is to be installed. By the use of appropriately disposed drawstrings 80 
(described below) the panel 12 can be easily reduced to approximate the 
size and shape of the vehicle window. 
A preferred embodiment of a front/back shade panel 17 suitable for use with 
the windshield and with the rear window of a vehicle is shown in FIGS. 1, 
2, 3 and 7. The front/back shade panel 17 is rectangular in shape having 
upper edges 18 and lower edges 20 of between about 72 and about 96 inches 
in length and having side edges 22 of between about 32 inches and about 48 
inches in width. Front/back shade panels 17 with this shape and these 
dimensions have been found to fit most automobile windshields and rear 
windows. Most preferably the front/back shade panel 17 is 
rectangular-shaped with an upper edge and lower edge length between about 
76 inches and about 84 inches and a side edge of between about 36 inches 
and about 44 inches. Front/back shade panel 17 with this shape and these 
dimensions have been found to fit most automobile windshields and rear 
windows with a minimum of excess material for windshields and rear windows 
of smaller vehicles. 
Preferably, front/back shade panels 17 useful with windshields have a slot 
24 running from the center of the upper edge of the panel a distance of 
between about 4 inches and about 12 inches toward the center of the panel 
17. This slit is useful in installing the front/back shade panel 17 around 
a centrally located rear view mirror. In a preferred embodiment, a strip 
of reinforcing iron-on tape or similar product (not shown) is used to 
cover over the slit when the slit is not in use. 
Embodiments of the shade panel 12 useful in combination with the side 
windows of vehicles are preferably smaller in size than the 
above-described embodiments useful for windshields and rear windows. A 
preferred embodiment of a side window shade panel 25 is shown in FIGS. 1, 
4, 5 and 8. The side shade panel 25 is preferably trapezoidal-shaped 
having two corners 26 and 28 of approximately 90.degree., one corner 30 of 
between about 62.degree. and about 67.degree. (most preferably about 
65.degree.), and one corner 32 of between about 112.degree. and 
117.degree. (most preferably about 115.degree.). The side shade panel 25 
has a base 34 which is preferably between about 30 and about 50 inches in 
length, an upper edge 36 which is between about 20 inches and about 32 
inches in length and a height 38 which is between about 25 inches and 
about 35 inches in length. Side window shade panels 25 having this size 
and shape will fit most automobile side windows. Most preferably, the side 
window shade panel 25 has a base length between about 36 inches and about 
44 inches, a top edge length between about 24 inches and 28 inches and a 
height between about 27 inches and about 33 inches. This size most closely 
approximates the size of most automobile side windows and minimizes the 
amount of excess material in the side windows of smaller vehicles. 
The shade panel 12 is attached to the inside of the vehicle with attachment 
means 14 suitable for quick and easy installation and de-installation of 
the shade panel 12. Suitable attachment means 14 include various hooks, 
snaps, buttons, etc. Preferred attachment means 14 are fibrous hook and 
eye fasteners such as those sold under the Velcro.RTM. trademark. 
A first attachment means moiety 40 is affixed to an edge of the shade panel 
12. The second, corresponding attachment means moiety 42 is affixed to the 
inside of the vehicle proximate to the outer edge of the window to be 
covered. Preferably, the second attachment means moiety 42 is affixed to 
the door frame or to the molding 43 which surrounds the vehicle window to 
be covered. Attaching the second attachment means moiety 42 to the window 
molding 43 as opposed to the window itself does not inhibit vision through 
the window and does not inhibit the opening and closing of the window. 
Sufficient attachment means first moieties 40 are placed about the 
periphery of the shade panel 12 so that when such first moieties 40 are 
attached to their respective second moiety counterparts 42, the shade 
panel 12 securely and fully covers the window. 
For a front/back shade panel 17 useful for covering windshields or rear 
windows, it is preferable to place a first attachment means moiety 40 
proximate to each of the four corners of the panel 17 (shown as attachment 
first moieties 44a, 46a, 48a and 50a in FIG. 7), proximate to the 
midpoints of the left side edge (52a) right side edge (54a) and bottom 
side edge (56a), and proximate to the center of the upper edge proximate 
to the slit (58a). 
For shade panels 25 useful for covering vehicle side windows it is 
preferred that a first attachment means moiety 40 be affixed to the side 
panel 25 proximate to each of the four corners of the panel (shown as 
attachment means first moieties 60a, 62a, 64a and 66a in FIG. 8). 
Corresponding attachment means second moieties 42 are attached about the 
periphery of the vehicle window in such a way that each first moiety 40 
lines up with and can be attached to a corresponding second moiety 42 
(shown as attachment means moieties 44b, 46b, 48b, 50b, 52b, 54b, 56b, 
58b, 60b, 62b, 64b and 66b). 
The pair of attachment means second moieties 48b and 50b disposed near the 
upper edge of the dashboard panel 72 allow the sun shade 10 to be 
conveniently stored on or over the dashboard 72 when not in use. The sun 
shade 10 is rolled longitudinally and then attached to the second 
attachment means moieties 48b and 50b using any of the pairs of oppositely 
disposed first attachment means moieties 40 disposed on opposite vertical 
edges of the panel 12. 
Similarly, the pair of attachment means second moieties 44b and 46b 
disposed near the upper molding 79 of the windshield allows the sun shade 
10 to be conveniently stored above the windshield when not in use. The sun 
shade 10 is rolled longitudinally and then attached to the second 
attachment means moieties 44b and 46b disposed near the upper-most molding 
79 of the windshield to any of the pairs of oppositely disposed first 
attachment means moieties 40 disposed on opposite vertical edges of the 
sun shade 10. 
Also, the pair of attachment means second moieties 48b and 50b disposed 
near the lower edge of the rear window allows the sun shade 10 to be 
conveniently stored below the rear window when not in use. The sun shade 
10 is rolled longitudinally and then attached to the second attachment 
means moieties 48b and 50b using any of the pairs of oppositely vertical 
edges of the panel 12. 
Sun shades 10 of the invention which are used to cover the side windows of 
an automobile can be conveniently stored when not in use by detaching all 
of the attachment means 14 except one or more of the attachment means 14 
disposed along one side edge of the panel 25, thereby allowing the sun 
shade 10 to hang downwardly to the side and/or below the window. A sash or 
curtain tie (not shown) can be used to hold the hanging sun shade 10 away 
from the window and/or other interior elements of the automobile. 
The drawstring means 16 comprises a drawstring 80 disposed within the shade 
panel 12 along a defined linear path 82 such that the opposite ends of the 
drawstring are fixed to the shade panel 12 and the remainder of the 
drawstring 80 is slidably attached along the linear path 82. The 
drawstring means 16 is adapted so that tugging on the drawstring 80 tends 
to draw opposite sides of the shade panel 12 toward each other (i.e., 
reduce the linear dimension of the shade panel 12 along the drawstring 
linear path 82). 
The central portion of the drawstring 80 can be slidably attached to the 
shade panel 12 by any of a number of standard drawstring attachment 
techniques, including but not limited to, enclosing the drawing within a 
"channel" of additional material 83 sewn over the drawstring 80 along the 
linear path 82 and having an opening 84 to expose the drawstring 80 so 
that drawstring 80 freely slides between its two fixed ends along the 
channel of attached material 83. Also, the drawstring means 16 can be 
disposed within the shade panel 12 by weaving the drawstring 80 in and out 
of the shade panel 12 along the linear path 82. Another embodiment of the 
drawstring means 16 employs a linear series of eyelets (not shown) adapted 
to allow the drawstring 80 to be strung through the eyelets along the 
linear path 82 across the shade panel 12. Also, special loops or staples 
attached to the panel and adopted to carry a drawstring 80 along the 
linear path 82 can be used. Also, iron-on tape can be used to create a 
channel through which the drawing can be strung. 
The drawstring 80 can be of any suitable size and material. String, cloth, 
metal, twine, leather thong and ribbon can be used. 
Whenever drawstring attachment method is used, the linear path 82 must 
provide access to the drawstring 80. Such access can be provided anywhere 
along the linear path 82. 
Preferably, several drawstrings 80 are disposed within the shade panel 12 
to allow size adjustment along several different panel dimensions. For 
front/rear shade panels 17, designed to be used with windshields or rear 
windows, it is preferred to have a drawstring 80 disposed along each of 
the four edges, one drawstring 80 disposed horizontally across the center 
of the panel 17 and two spaced-apart drawstrings 80 disposed vertically 
across the width of the panel 17. This preferred disposition of drawstring 
80 allows the panel 17 to be adjusted in numerous ways to facilitate 
matching the front/rear shade panel 17 to almost any windshield or rear 
window size and shape. 
For side shade panels 25 useful in conjunction with automobile side 
windows, it is preferred that drawstrings 80 can disposed along each of 
the four panel edges, one drawstring 80 disposed horizontally across the 
center of the panel 25, and two spaced-apart vertically disposed 
drawstrings 80 disposed across the central portion of the side shade panel 
25. This preferred configuration of drawstrings 80 allows the side shade 
panel 25 to be easily matched with almost any size and shape of vehicle 
side window. 
Although the present invention has been described in considerable detail 
with reference to certain preferred versions, many other versions should 
be apparent to those skilled in the art. Therefore, the spirit and scope 
of the appended should not necessarily be limited to the description of 
the preferred versions contained herein.