Tent – canopy – umbrella – or cane – Portable shelter – Shelter suspended from diverse support means
Patent
1996-01-24
1998-08-11
Mai, Lanna
Tent, canopy, umbrella, or cane
Portable shelter
Shelter suspended from diverse support means
135115, 135 96, E04H 1504
Patent
active
057913625
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention refers to a sun shade, which can be used particularly as a complement for lawn chairs and analogous products.
FIELD OF THE INVENTION
The invention's main characteristic is to protect against skin-harming radiation, such as UVB and UVC radiation during sunbathing.
DESCRIPTION OF THE RELATED ART
The main problem existing in sun exposure of the skin is that intensive action of UVB and UVC radiation fractions may not lead only to sunburn, but over the time also to skin cancer. The UVA radiation, which causes desired tanning only, is not harmful in this respect.
Materials are already known which let UVA radiation pass through and absorb UVB and UVC radiation. In principle, these materials can be produced and processed as foils with respective characteristics.
It is furthermore known to shade lying surfaces such as lawn chairs in conventional manner, for example with adjustable shading devices for the head, the body and the legs. It has for example become known from U.S. Pat. No. 6,155,366 to provide a shading device for the trunk of the body, wherein the shading consists of conventional materials being opaque to all radiation fractions of sunlight, such as thick textile materials.
Furthermore, from GB-PS 18 923 it is known to provide an adjustable device which shades only the head portion of a lawn chair or baby carriage.
In addition, U.S. Pat. No. 4,068,673 shows an independent shading device of which the angle of attachment and the height can be adjusted by respective adjustable hinges. However the shading is provided by conventional, completely impermeable materials.
Furthermore, U.S. Pat. No. 4,720,135 shows a device mounted in the bumper of a vehicle for rolling up a foil being tensible from the front bumper of a car and extending to the rear bumper, which prevents on one hand a soiling of the car by the environment in parked position and which should prevent by printed warning symbols the car from being run into when in a parked position. This device has no protective capabilities with respect to sunlight.
Because the known shading devices are always equipped with materials completely blocking the sun-light, a respective continual adjustment regarding the areas, where shading is wanted, is necessary and moreover the desired tanning without harmful side effects can take place only by an exact time regulation.
SUMMARY OF THE INVENTION
It is therefore the aim of the present invention to provide a sun shade or protective cover against the harmful UVB and UVC radiation fractions of the sun-light, which does not need an exact time limitation of the duration of exposure nor a very precise positioning of the sun shade. Furthermore the sun shade should show a simple construction and should be able to equip existing lying surfaces, such as lawn chairs.
This object is achieved with the characterising features of claim 1. Preferred embodiments result from the subclaims.
In principle a very simple, light-weight and therefore inexpensive embodiment consists in that the protective cover or shade is formed of a partly transparent foil, which is advantageously provided in a roll with a spring-biased and therefore automatic winding mechanism and is extended on its free leading edge via a stabilizing strip. A cover or shade of this type can be fastened on any desired point by attaching the stabilizing strip to corresponding supports into which the stabilizing strip is pressed down by the force of the tension spring of the retrieving mechanism. With the design of the supports as uniform secondary support which, just like the stabilizing strip, extends over the width of the foil, the shade consists of two separate pieces which can be separately attached and fixed.
A cover or shade of this type can be fastened, for example, to the lower end and the upper end of a lawn chair known per se. One of the many advantages is that the device can be added to a lawn chair and that the cover can be positioned at such a minimum height above the chair which is comfortable for the user. Fur
REFERENCES:
patent: 3584322 (1971-06-01), McDougall
patent: 4962780 (1990-10-01), Engdahl et al.
patent: 5333663 (1994-08-01), Eger
patent: 5437298 (1995-08-01), Lin
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