Patent Application
20200305592
The present invention relates to outdoor equipment, outdoor furniture, outdoor camping equipment and parts and fittings therefore, and more particularly, relates to the construction of an inflatable sleeping pad or mattress that provides an additional layer at the center of the pad to join the top and bottom baffle fabric and in which the bottom fabric layer is coated on both sides for ease of welding and repair.
A large portion of the population enjoy camping and other outdoor activities. When engaged in these activities, however, many people enjoy some of the comforts of home. Although individuals engaged in the activities enjoy such comforts of home, weight, space and collapsibility is still an important feature.
Campers and others who sleep away from a home or motel often desire to soften the ground or floor on which they sleep with a foam or air filled pad. Sleeping pads are widely used in the camping and outdoor arenas. Although foam sleeping pads are well-known, hikers and other remote campers are concerned with the weight they must carry and also the volume they must carry. Accordingly, some sleeping pads (such as foam sleeping pads) are much too large and bulky and not usable by hikers. Air filled (i.e. inflatable) sleeping pads are also widely known. Although air filled sleeping pads are generally lightweight and collapsible, they are often difficult to repair and are not tear and puncture resistant.
Accordingly, what is needed is an inflatable sleeping pad or mattress with a dual coated bottom sheet allowing electronic “welding” to the interior of the bottom sheet while also facilitating ease of repair in the field given the coating on the bottom or exterior of the bottom sheet, thus providing significant tear and puncture resistance and ease of repair.
The present invention features an inflatable sleeping pad. The sleeping pad comprises an inflatable pad having a top layer and a bottom layer, wherein the top and bottom layers are disposed parallel to one another and have a length and a width.
The bottom layer includes an inside facing surface as well as an outside facing surface. Both the inside and outside facing surfaces of the bottom layer are coated with polyurethane either entirely or at least in some predetermined locations to allow spot welding of the bottom layer to one or more interior trusses or baffles. The inside facing surface is coated with polyurethane to facilitate the welding between the inside surface of the bottom layer and the baffles or trusses as will be explained in greater detail below in connection with a second embodiment. The outside facing surface is coated to facilitate field repair of punctures with a self-adhesive patch that can cure to 80% or more a full strength in just minutes, making the inflatable sleeping pad usable immediately in the case of a care or puncture.
The top layer also includes an inside facing surface and an outside facing surface. The inside facing surface of the top layer is also coated either entirely or in selected predetermined areas with polyurethane to facilitate the welding of the inside surface of the top layer to baffles or trusses as will be explained in greater detail below.
In a second embodiment, the sleeping pad further comprises at least one middle layer constructed of a first material having a length and a width and disposed parallel to the top and bottom layers, and wherein the at least one middle layer is supported between the top layer and the bottom layer. In yet another embodiment, the sleeping pad further comprises a plurality of support baffles, wherein a first plurality of support baffles is disposed between the at least one middle layer and the top layer, and a second plurality of support baffles disposed between the at least middle one layer and the bottom layer. The sleeping pad in all embodiments includes an air inlet/outlet valve disposed on at least one of the inflatable pad top or bottom layers.
In one embodiment, the first and second plurality of support baffles may be truss support baffles, attached at predetermined locations between the top layer, the middle layer, and the middle layer and the bottom layer.
In another embodiment, the first and second plurality of truss support baffles are made of a heat weldable material and are spot welded at predetermined locations between the top layer, the middle layer, and the bottom layer. In this embodiment, the interior facing surfaces of the top and bottom layers include at least a plurality of heat weldable regions.
In one or more embodiments, the at least one middle layer, preferably constructed of a non-heat weldable material, includes a plurality of openings such that the first plurality of truss baffles are welded at predetermined points directly to predetermined regions of the second plurality of truss baffles through the plurality of openings in the at least one middle layer.
The at least one middle layer is preferably constructed of a thermal energy reflective material. In one example, the middle layer is a mylar coated aluminum sheet.
In a further embodiment, the inflatable sleeping pad includes two middle layers, wherein the two middle layers are supported between the top and bottom layers in a spaced apart configuration, and wherein the plurality of truss baffles include a first plurality of truss baffles disposed between the bottom layer and a first one of the two middle layers, a second plurality of truss baffles are disposed between the first one of the two middle layers and the second one of the two middle layers, and wherein a third plurality of truss baffles are disposed between the second one of the two middle layers and the top layer. In this embodiment, the first, second and third plurality of truss baffles are made of a heat or ultrasonic weldable material.
The first and second middle layers preferably include a plurality of openings and predetermined regions of the first plurality of truss baffles are welded at predetermined points directly to predetermined regions of the second plurality of truss baffles through the plurality of openings in the first middle layer, and wherein predetermined regions of the second plurality of truss baffles are welded at predetermined points directly to predetermined regions of the third plurality of truss baffles through the plurality of openings in the second middle layer.
In one disclosed preferred embodiment, the two middle layers are not heat weldable however this is not a limitation of the present invention as in any embodiment were in a middle layer is present, it may be made of a heat weldable material or include a coating making the surfaces of the middle layer heat weldable.
These and other features and advantages of the present invention will be better understood by reading the following detailed description, taken together with the drawings wherein:
Closely related to an air mattress, an inflatable pad requires an external pressure source to inflate, typically in the form of a pump or by blowing orally. Convection of the air inside the mattress from a bottom surface typically against a cold and/or wet ground to the top surface against which a user sleeps reduces the amount of insulation the air mattress provides. One method of reducing convection is by partitioning the internal cavity between the top and bottom sheets or by filling the cavities with material to trap the air such as down feathers or synthetic insulation. Manually inflated pads have the advantage of offering good thickness and a great deal of comfort while being lightweight and able to pack to a small size.
Accordingly, the feature of the present invention is a construction technique for inflatable sleeping pads 50 and the like which provides one or more additional sheet 26 at the center of the pad that joins the top 20 and bottom 22 sheets to a series of internal baffles 24, 28, see
An additional feature of this embodiment of the present invention features providing a bottom sheet of fabric 22 on an inflatable air pad or the like, that is coated on both sides (interior and exterior) with polyurethane,
The sleeping pad 50, in accordance with an embodiment of the present invention, is described in more elaboration hereinafter with respect to
In one embodiment, the first and second plurality of support baffles 24, 28 are truss support baffles, attached at predetermined locations between the top layer 20, the middle layer 26, and the bottom layer 22. In one example, the first and second plurality of truss support baffles are made of a heat weldable material and are spot welded at predetermined locations between the top layer 20, the middle layer 26, and the bottom layer 22.
In a non-limiting embodiment, the top and bottom layers 20, 22 each include an interior facing surface, and wherein each of the interior facing surfaces of the top and bottom layers include at least a plurality of heat weldable regions. Furthermore, the at least one middle layer 26 includes a plurality of openings. Predetermined regions of the first plurality of truss baffles 28 are welded at predetermined points directly to predetermined regions of the second plurality of truss baffles 28 through the plurality of openings in the at least one middle layer 26.
In an alternative embodiment, the at least one middle layer 26 may be heat weldable and therefore may not include a plurality of openings. The at least one middle layer 26 is preferably constructed of a thermal energy reflective material. In one example, the middle layer 26 is a mylar coated aluminum sheet and thus not heat weldable and therefore the provision of a plurality of openings facilitates the welding of first and second trusses 24, 28 directly to one another through the openings.
In another embodiment (not shown but within the ordinary skill of the art), the air mattress may include two (2) or more middle layers 26, wherein the two middle layers are supported between the top and bottom layers in a spaced apart configuration by a plurality of truss baffles. The plurality of truss baffles include a first plurality of truss baffles disposed between the bottom layer 22 and a first one (26a) of the two middle layers, a second plurality of truss baffles 28 are disposed between the first one of the two middle layers 26a and the second one of the two middle layers 26b, and wherein a third plurality of truss baffles are disposed between the second one of the two middle layers 26b and the top layer 20. In the preferred embodiment of this configuration, the first, second and third plurality of truss baffles are made of a heat or ultrasonic weldable material. Furthermore, the first and second middle layers may include a plurality of openings.
Similar to the previously explained embodiment, predetermined regions of the first plurality of truss baffles are welded at predetermined points directly to predetermined regions of the second plurality of truss baffles through the plurality of openings in the first middle layer, and wherein predetermined regions of the second plurality of truss baffles are welded at predetermined points directly to predetermined regions of the third plurality of truss baffles through the plurality of openings in the second middle layer. In one embodiment, the two middle layers are not heat weldable.
Accordingly, the present invention provides a novel and nonobvious air mattress including the features of a bottom layer having polyurethane coating on both the interior and exterior surfaces to facilitate heat welding to the interior surface of the bottom layer and tear or puncture repair on the exterior surface of the bottom layer. One or more middle layers, preferably heat reflective layer, is provided in the Central region of the air mattress and supported by first and second layers of trusses which suspend or support the middle layer between the bottom layer and the top layer, to reduce convective air currents within the interior of the air mattress thereby preventing heat from a user's body from escaping to the ground or other cold surface on which the air mattress is placed.
Modifications and substitutions by one of ordinary skill in the art are considered to be within the scope of the present invention, which is not to be limited except by the allowed claims and their legal equivalents.
This application is a Divisional Application of U.S. patent application Ser. No. 15/878,989 titled “SMALL TABLE FRAME”, which was filed on Jan. 24, 2018 and claims priority from U.S. Provisional Patent Application No. 62/449,818 filed on Jan. 24, 2017 and titled “OUTDOOR EQUIPMENT 2016”, which is incorporated fully herein by reference.
| Number | Date | Country | |
|---|---|---|---|
| 62449818 | Jan 2017 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 15878989 | Jan 2018 | US |
| Child | 16731271 | US |
