# Patent

## Title
Sleeping surface elevation device

## Abstract

A sleeping surface elevation device having selectively adjustable height and tilt angle is described. The elevator includes base blocks for placing on the floor and for receiving the legs of an adult bed, hospital bed, cot, crib, toddler bed, or the like. The elevator also includes a variety of mechanisms for adjusting the height and angle of the sleeping surface, including elevating blocks. A centerpiece, connected to the base blocks, to facilitate installation of the legs of the sleeping surface into the elevator is also provided.

## Background
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of U.S. patent application Ser. No. 10/963,175, filed Oct. 12, 2004, now U.S. Pat. No. 7,020,916, which is hereby incorporated by reference, and claims priority and the benefit under 35 U.S.C. § 120.


BACKGROUND
The present invention relates generally to an elevator for a sleeping surface, such as adult beds, hospital beds, cots, cribs, toddler beds, and the like and in particular to an elevator capable of being variably adjusted and further capable of securely elevating various types of sleeping surfaces.
Physicians and in particular pediatricians advise their patients and parents on occasion to elevate the head of their child's crib or toddler bed to alleviate conditions such as gastro-esophageal reflux, colds, and sinusitis. Elevating the head of the crib or toddler bed introduces a tilt to the sleeping surface, which has beneficial physiologic effects. For example, a baby suffering from acid reflux may obtain relief from tilting of his crib, which allows gravity to keep stomach acid from moving up into the baby's esophagus. Elevation also assists children suffering from earaches, head congestion, sore throats, and sinusitis by elevating the head above the body, and thereby enhancing drainage of the sinuses.
Depending upon the condition suffered by the child and its degree, a physician may direct the parents to tilt the bed at varying angles or he may direct the parents to tilt the bed at an initial angle and then adjust the tilt angle later to suit the child's conditions. Thus, a need exists for a crib and toddler bed elevator that is selectively and variably adjustable. Because the elevator commonly is used around small children and toddlers, a need also exists for an elevator that includes safety features in the event a small child or toddler falls onto or strikes the elevator.
Adults likewise benefit from the conditions produced by selectively elevating one end of a bed, hospital bed, cot, and the like. For example, acid reflux can be reduced by the tilt angle produced in an adult bed. Thus, a need also exists for an adult bed elevator that is selectively and variably adjustable and that includes safety features.
Adult bed elevators are common in the art. Examples of adult bed elevators include U.S. Pat. Nos. 2,893,164; 2,933,850; 5,224,227; 5,345,631; 6,012,185; 6,575,414 B2; and U.S. patent application Ser. No. 09/777,517 (Pub. No. US 2001/0023509 A1). However, none of these patents provide a selectively adjustable system specifically designed for ease of installation and adjustment. Adult bed elevators known in the art, typically comprised of two blocks, normally require that each block be installed separately. The user normally places each block near the leg of the adult bed, lifts the bed at least once, then positions each block under the legs of the bed. This will typically require more than one lift of the bed or more than one adult to install the blocks. A need, therefore, exists for a system that allows a single user to install a bed elevation device with a single lift of the bed. The inclusion of a centerpiece connected to the base blocks, as provided in the invention, reduces the likelihood that a base block will tip or fall over during installation. This assists with installation of the elevator and creates a single structure that is easily moved or adjusted.
Prior art elevators also do not address safety concerns associated with the presence of small children. For example, many of the adult bed elevators are made of hard material and have straight edges, which pose a risk to small children and toddlers. Devices that elevate the mattress, as opposed to the legs, are also known in the art. U.S. Pat. Nos. 5,208,925 and 6,378,151 are examples. These patents do not adequately address the above problems because, among other things, both require a parent to expend considerable effort installing and removing the elevation devices. This would be difficult, if not impossible, to do while holding a small child. In addition, it is preferable that a mattress should be tight against all crib and toddler bed wall sides. Thus, there is a need to raise and lower the bed, rather than the mattress.
The present invention overcomes the limitations of the known devices and provides a safe, simple, and easy to install means for elevating adult beds, hospital beds, cots, cribs, toddler beds, and the like to assist adults, children, and babies suffering from a variety of conditions, including acid reflux, sinusitis, allergies, head congestion, and the like.
All references cited herein are incorporated by reference to the maximum extent allowable by law. To the extent a reference may not be fully incorporated herein, it is incorporated by reference for background purposes and indicative of the knowledge of one of ordinary skill in the art.
SUMMARY
The present invention is directed to a system and apparatus that satisfies the above-identified needs. The apparatus of the present invention comprises one or more base blocks having a bottom surface and an upper surface for supporting the leg of the bed. A centerpiece is also provided. Each end of the centerpiece is secured to each base block, thereby making the elements substantially rigid. Once the elements are secured, a user can install both base blocks nearly simultaneously by moving the centerpiece to place the base blocks beneath the legs of the bed.
In accordance with this embodiment, additional optional features are provided. The upper surface of the base blocks may include a well or may be substantially flat, sloped, recessed, or contain grooves or notches. The centerpiece may also include a means for variably adjusting the length of the centerpiece. This may take several forms, including a combination of an outer sleeve and inner sleeve, wherein the inner sleeve is adapted to fit within and slide axially about the outer sleeve. The centerpiece may also be comprised of more than one member or be selected from a plurality of centerpieces having varying lengths.
Several means for variably adjusting the height or tilt of the base blocks, and hence, the bed are also provided. These means include height adjustment blocks adapted to be placed between each base block and the floor. Additionally, the base blocks and centerpiece may be formed out of or comprise a single structure.
In another embodiment, the base blocks comprise a bottom surface, an upper surface, and a well located on the upper surface of the base block. The well is a recessed area having side walls and a bottom surface and is adapted to accept a leg of the adult bed, hospital bed, cot, crib, or toddler bed. Once the leg is inserted into the well, the bed will be elevated to a suitable height and angle to induce the health and other benefits discussed above.
In accordance with this embodiment, the additional optional features discussed above may also employed. These include a centerpiece with a means for variably adjusting the length of the centerpiece and a centerpiece selected from a plurality of centerpieces having different lengths. This embodiment also includes an optional means for adjusting the height and tilt angle of the bed, including height adjustment blocks coupled to the base blocks. Additional optional features include a ring secured to the bottom surface of the well for accepting a roller, ball, or coaster of the bed leg; a slot formed in the lower surface of the well for accepting the leg of the bed; padding disposed on the base blocks and the centerpiece; non-slip surfaces disposed on the bottom surfaces of the base blocks and centerpiece; and rounding of the exposed edges of the base blocks and centerpiece. Further, the base blocks and centerpiece may formed out of or comprise a single structure.
In another embodiment, an apparatus for elevating the bed is provided that includes a base block having a bottom surface, an upper surface that is smaller in area than the bottom surface, an outer surface in contact with the bottom and upper surfaces that is sloped from the upper surface to the bottom surface, and a well having side walls and a bottom surface formed within the upper surface of the base block. The well is adapted to accept a leg of the bed. The exposed edges formed by the interfaces of the bottom surface, outer surface, upper surface, and well are preferably substantially rounded.
In accordance with this embodiment, additional optional features are provided. These features include a means for variably adjusting the elevation and tilt of the base block and hence the tilt angle and elevation of the bed. Additional optional features include a ring secured to the bottom surface of the well for accepting a roller, ball, or coaster of the bed leg; a slot formed in the lower surface of the well for accepting the leg of the bed; padding disposed on the base block; and a non-slip surface disposed on the bottom surface of the base block.
In another embodiment of the present invention, two base blocks are provided. The first base block has a bottom surface, an upper surface for supporting the support structure of the bed, and an inner side. The second base block has a bottom surface, an upper surface for supporting the support structure of the bed, and an inner side with a cavity formed in it for accepting the inner side of the first base block. Optionally, the base blocks may include means for variably adjusting the elevation or tilt of the blocks, and hence the elevation or tilt angle of the bed, including employing one or more height adjustment blocks placed between the each base block and the floor. Additionally, the base blocks may be formed out of or comprise a single structure.
Other objects, features, and advantages of the present invention will become apparent with reference to the drawings and detailed description that follow.



BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of the present invention illustrating bed 200 installed on sleeping surface elevator 10.
FIG. 2 is a side view of the present invention illustrating bed 200 installed on sleeping surface elevator 10 with a tilt angle 206.
FIG. 3 is top view of the present invention illustrating base block 20 and centerpiece 60.
FIG. 4 is a bottom view of the present invention illustrating base block 20, optional non-slip surface 82, centerpiece 60, and optional non-slip surface 70.
FIG. 5 is a perspective view of the present invention illustrating base block 20.
FIG. 6 is a side view of the present invention illustrating bed leg 204 installed in well 22 of base block 20.
FIG. 7 is a side view of another embodiment of the present invention illustrating bed leg 204 with coaster or roller 208 installed in well 22 of base block 20.
FIG. 8 is a perspective view of an alternative embodiment of the invention illustrating base block 400.
FIG. 9 is a bottom view of an alternative embodiment of the invention illustrating the bottom surface 412 of base block 400 and optional centerpiece 60.
FIG. 10 is a perspective view of the present invention illustrating centerpiece 60 comprised of an outer sleeve 74 and inner sleeve 76.
FIG. 11 is a side view of an embodiment of the present invention illustrating centerpiece 60 and base block 20.
FIG. 12 is a perspective view of an alternative embodiment of the present invention illustrating outer sleeve 64 and inner shaft 66 of centerpiece 60A.
FIG. 13 is a side view of an alternative embodiment of the present invention illustrating an alternative height-adjustment means employing a spring 300.
FIG. 14 is a side view of an alternative embodiment of the present invention illustrating an alternative height-adjustment means employing a lever 310.
FIG. 15 is a bottom view of an alternative embodiment of the present invention illustrating an alternative height-adjustment means employing spring-loaded tabs 320.
FIG. 16 is a side view of an alternative embodiment of the present invention illustrating an alternative height-adjustment means employing spring-loaded tabs 320.
FIG. 17 is a side view of an alternative embodiment of the present invention illustrating an alternative height-adjustment means employing an insert 330.
FIG. 18 is a side view of an alternative embodiment of the present invention illustrating an alternative height-adjustment means employing an air cartridge 340.
FIG. 19 is a side view of an alternative embodiment of the present invention illustrating an alternative height-adjustment means employing an adjustment screw 354 and springs 356 and 358.
FIG. 20 is a side view of an alternative embodiment of the present invention illustrating an alternative height-adjustment means employing a motor 360.
FIG. 21 is a side view of an alternative embodiment of the present invention illustrating an alternative height-adjustment means employing spring-loaded pins 374.
FIG. 22 is a side view of an alternative embodiment of the present invention illustrating an alternative height-adjustment means employing an air control valve 384.
FIG. 23 is a side view of an alternative embodiment of the present invention illustrating an alternative height-adjustment means employing a lever 904.
FIGS. 24A, 24B, and 24C are perspective views of alternative embodiments of base block 400.
FIG. 25 is a perspective view of an alternative embodiment of the elevator 10 supporting a bed 200 with square support structure 212.
FIG. 26 is a perspective view of an alternative embodiment of the elevator 10 supporting a bed 200 with a two-rail 202 support structure 212.
FIG. 27 is a perspective view of an alternative embodiment of the invention illustrating centerpiece 60 connected to well 22 of base blocks 20.
FIG. 28 is a perspective view of an alternative embodiment of the invention illustrating base blocks 500 and centerpiece 550.
FIG. 29 is a perspective view of an alternative embodiment of the invention illustrating base blocks 600.



DESCRIPTION
In the following detailed description of the preferred embodiments, reference is made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration specific preferred embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, and it is understood that other embodiments may be utilized and that logical changes may be made without departing from the spirit or scope of the invention. To avoid detail not necessary to enable those skilled in the art to practice the invention, the description may omit certain information known to those skilled in the art. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is defined only by the appended claims.
The present invention is adapted to work equally well with adult beds, hospital beds, cots, cribs, toddler beds, and the like. As used herein, “bed” includes adult beds, hospital beds, cots, cribs, toddler beds, and any other structure used for sleeping, resting, or reclining, which includes at least one leg or supporting structure resting on a surface. Referring to FIG. 1, a bed 200 with a frame 202 and legs 204 is illustrated installed into base block 20. FIG. 2 illustrates a side view of the bed 200 and the elevator 10. As shown in the FIG. 1, one end of the bed 200 is elevated by elevator 10 resting on floor 220. The elevation of one end of the bed 200 creates a tilt angle 206 (shown in FIG. 2) relative to the horizontal. This tilt to sleeping surface 210 allows for the upper extremity of a person lying on the bed to be higher than the person's abdomen and lower extremity or vice versa.
Elevator 10 includes the base blocks 20 and optional centerpiece 60. As shown in FIGS. 3, 4, and 5, the base block 20 has a bottom surface 80, upper surface 42 (not shown), outer sides 24, inner side 26, and a well 22. A non-slip surface 82 such as rubber or the like material may optionally be added to the bottom surface 80 to further enhance the base block 20's ability to resist movement while the bed 200 is installed. In the preferred embodiment of the present invention, slots 84 are included on bottom surface 80 for securing the base block 20 to optional variable elevation block 86 (shown in FIG. 7). Typically, the base block 20 is 6 to 7 inches wide and 3 to 4 inches in height. These dimensions are not material to the invention and can vary depending on the application.
Turning to FIG. 5, well 22 of the base block 20 is illustrated. The well 22 is comprised of side walls 38 and bottom surface 36. The side walls 38 may be either sloped or substantially vertical. The well 22 is of sufficient depth and width to accommodate the leg 204 of the bed 200 and securely maintain it. Preferably, the bottom surface 36 of the well 22 is between 3⁄8 to 5⁄8 inches above the bottom surface 80 of base block 20, but can vary depending on the application. The bottom surface 36 of well 22 may be sloped to enhance performance of the base block 20 by increasing the area of contact between the bottom surface 36 and leg 204. FIG. 5 illustrates a rectangular-shaped well 22. The well 22 may be a round, oval, square, or other shape so long as it is capable of accommodating legs of common beds. Adult beds, cribs, and toddler beds commonly use different legs structures, such as rectangular-shaped, cylindrical, and square-shaped legs of varying sizes. Coasters or rollers may also be used. Therefore, well 22 should be of sufficient width and depth to accommodate these varying sizes of legs. A well 22 depth of 1 to 2.5 inches and a width of 1 to 4 inches are preferred, but those dimensions can vary based on the application.
The well 22 may also include a slot 28 and ring 30. Where the bed leg 204 is a relatively narrow rectangular shape, it can be inserted into slot 28 (shown in FIG. 6) located in the bottom surface 36 of the well 22. For a leg with a roller, coaster, or ball-shaped end, the leg can be installed as shown in FIG. 7 such that it rests on ring 30 on the bottom surface 36 (not shown) of the well 22. Ring 30 will assist in restraining lateral movement of the roller, coaster, or ball within the well 22, and is preferably constructed of rubber or the like material. A relatively wide leg 204 without a roller, coaster, or ball is installed by inserting the leg 204 into the well 22 where it will rest primarily on the bottom surface 36. Thus, the various embodiments of the invention can accommodate a variety of leg shapes. One skilled in the art would appreciate the multitude of additional structures and manners in which legs 204 can be secured in the base block 20.
The base block 20, including the bottom surface 36 and the inner walls 38 are preferably constructed of a rigid material such as plastic, hard rubber, wood, metal, and the like. A material that is economical to manufacture, durable in use, and refined in appearance is preferred. One skilled in the art would appreciate the different types of materials, which may be used. In the preferred embodiment, all exposed surfaces of the base block 20, including the edges of outer sides 24, the inner side 26, the well 22, the inner walls 38, and the bottom surface 80, should be substantially rounded. An edge of at least 1/16 of an inch in radius is preferred. Rounded edges are preferred over straight edges because they enhance the safety of the device and lessen the chance that a person, particularly a small child, may be injured by falling onto or striking the base blocks 20. As shown in FIG. 3, padding 32 may optionally be attached over the exposed or exterior surfaces of the base block 20 to enhance the safety of the device. Padding 32 can also be attached to the optional centerpiece 60. Padding 32 can be made of cotton, synthetic material, rubber, foam, and any other suitable material. Preferably, outer sides 24 and inner side 26 slope downward from their respective intersections with the upper edge of well 22 to bottom surface 80 of the base block 20. These outer surfaces are preferably concave in shape and are a further enhancement of the safety of the device. Substantially straight surfaces and edges, however, may be used, but sloping surfaces and rounded edges are preferred as they enhance the safety of the device.
In the preferred embodiment, variable height adjustment blocks 86 (also referred to as variable elevation blocks) are used to allow a user to selectively adjust the height of the elevation and hence tilt angle 206. The blocks can be constructed of materials similar to the base block 20. In the preferred embodiment, all exposed edges of the variable elevation block 86 are substantially rounded similar to the base block 20. FIG. 7 illustrates a side view of a base block 20 with variable elevation block 86 installed. Variable elevation block 86 preferably includes studs or the like structure to secure it to bottom surface 80 of the base block 20. As shown in the figure, studs 88 protrude through slots 84 (not shown) of the base block 20. This mechanism resists movement of the variable elevation block 86 relative to the base block 20. An optional non-slip surface 92 (not shown) is preferably disposed on bottom surface 90 of variable elevation block 86. Variable elevation block 86 may also include slots 94 similar to slots 84 of the base block 20 so that additional variable elevation blocks 86 may be used to further increase the height of the bed 200. The additional variable elevation blocks 86 may be secured in the same manner as the base block 20 is secured to variable elevation block 86.
Variable elevation blocks 86 of different heights may be used as well to vary the height of the bed 200. For example, blocks with a height of 1⁄2 an inch, 1 inch, 2 inches, and the like can be used alone or in combination to provide a variety of selectable heights. Variable elevation block 86 may either have a flat upper surface substantially parallel to its bottom surface or the upper surface may be sloped. The latter is preferred because it enhances the elevation of the bed 200 by increasing the surface area of contact between leg 204 and well 22.
To achieve the following angles with a common crib that is 54 inches in length, the following elevation heights are used:














Elevation Height
Tilt Angle









.5′′ 
 .52 degree



1′′
1.06 degrees



2′′
2.12 degrees



3′′
3.18 degrees



4′′
4.25 degrees










A tilt angle 206 of 1 to 4.5 degrees is generally preferred. Thus, for most applications, an elevation of 1.5 to 3 inches is optimal for a crib 54 inches in length. One skilled in the art, however, will recognize that lesser or greater angles can be used depending upon the purposes for which the elevator 10 is used.

Because adult beds, hospital beds, cots, and the like are considerably longer than the average crib or toddler bed, a bed elevation device will not produce the same tilt angle 206 for a given elevation height. For example, a three-inch bed elevator used on an adult bed 82 inches in length will create an approximate 2.1-degree tilt angle. This is considerably less than the approximate 3.2-degree angle produced for a crib 54 inches in length. Thus, for most applications an elevation of 1.5 to 9 inches is preferred for a bed that is 80 inches in length. The specific tilt angle desired varies with the application and is not material to the invention. As provided above, the invention includes several different means to adjust the height and hence the tilt angle 206.
FIGS. 8 and 9 illustrate an alternative embodiment of the base block. As shown in FIG. 8, base block 400 has an upper surface 402, optional lip 404, outer surface 406, and inner side 408. FIG. 9 illustrates the bottom surface 412 of base block 400 along with optional slots 414 and non-slip surface 416. Bottom surface 412 of the base block 400 rests on the floor 220. The legs 204 of the bed 200 rest on the upper surface 402 of the base block 400. The upper surface 402 can be either substantially even or include a recessed area with an optional lip 404. Centerpiece 60 can be connected to the inner side 408 of the base block 400 in much the same manner as described above or any other part of the base block 400.
FIGS. 24A, 24B, and 24C illustrate alternative embodiments of the base block 400 with differing upper surface structures. As shown in the figures, the upper surface 402 can be substantially flat without a recessed area (FIG. 24A) or with a recessed area similar to block 400 shown in FIG. 8, sloped or inclined (FIG. 24B), or contain a groove or u-shaped recess (FIG. 24C). Preferably, the upper surface may take any shape that suitability supports the support structure 212 of the bed. Presently available beds are not limited to a support structure having four legs. For example, beds wherein the support structure 212 is comprised of two rails, beams, or wide legs are common. Other beds have support structures that are largely flat and resemble pedestals.
FIGS. 25 and 26 illustrate examples of these types of bed. In FIG. 25, the bed 200 is supported by a support structure 212 that is largely box shaped. The elevator 10 is used to elevate one end of the bed 200 by lifting the support structure 212 off the floor 220. For this application, a base block 400 with a sloped upper surface 402 (as in FIG. 24B) or flat upper surface 402 (as in FIG. 24A) is preferred. The bed 200 illustrated in FIG. 26 has two rails 202 that run parallel to the length of the bed 200. It is preferred that a base block 400 with a groove or u-shaped recess in its upper surface 402 (as in FIG. 24C) is employed. The elevators 10 shown in FIGS. 25 and 26 also include optional centerpiece 60. The centerpiece 60 can be relatively thin as shown in FIG. 25 or be as thick as the base blocks 400 as shown in FIG. 26.
The base block 400 is constructed of the same type of materials as base block 20. As with base block 20, it is preferred that all exposed edges of base block 400, including the intersections of the upper surface 402, optional lip 404, and outer surface 406, should be substantially rounded. Padding 32 may also be disposed on or attached to the exterior surfaces of the base block 400 to enhance safety of the device. Although FIGS. 8 and 9 illustrate base block 400 having substantially straight edges (outer surface 406 is generally perpendicular to upper surface 402 and bottom surface 412), sloping of the exposed surfaces and edges is preferred. Base block 400 is also adapted to work with variable elevation blocks 86 and may include slots 414 to accommodate a variable height adjustment block 86 with studs 88. Although not necessary, it is preferred that alternative base blocks 400 be used in connection with centerpiece 60.
In addition to variable elevation blocks 86, several other mechanisms and means can be used to selectively and variably adjust the height of the base blocks 20 and 400. For sake of simplicity, the following discussion of additional embodiments will refer to base block 20, but includes alternative base blocks 400, 500, and 600. FIG. 13 illustrates a mechanism comprised of a spring 300 located in a housing 302 and a knob 304 mounted on a screw 306. The height of the base block 20 can be adjusted by rotating the knob 304, which alters the force on the spring 300, thereby raising or lowering the base block 20. Alternatively, a large screw (not shown) can be used to adjust the height of the base block 20, which causes the block to move up or down depending on how the screw is turned.
In an alternative embodiment, a lever 310 mechanically coupled to a jack mechanism 312, similar to a jack for an automobile, is included with the base block 20. As shown in FIG. 14, the base block 20 may be raised by pressing on the lever 310 or lowered by raising up on the lever 310.
In an alternative embodiment, shown in FIGS. 15 and 16, optional spring-loaded tabs 320 are installed in the bottom surface 80 of the base block 20. The elevation of the base block 20 can be adjusted by pressing on the spring-loaded tabs 320 and rotating them flush with the bottom surface 80 of the base block 20. The elevation of the base block 20 can be variably selected by depressing spring-loaded tabs 320 of different thicknesses. While FIG. 15 illustrates three sets of tabs of varying thicknesses, any number of tabs can be used to provide a maximum number of elevation options.
In an alternative embodiment, shown in FIG. 17, an insert 330 is installed in the well 22 of the base block 20. The distance between the bottom surface 332 of the insert and its upper surface 334 is less than the depth of the well 22 of the base block 20. By installing the insert, the user can increase the elevation of the bed and hence the tilt angle. One skilled in the art will appreciate that inserts 330 of varying depths may be used to provide a variety of elevation height options to the user and that the inserts 330 can be flat or include additional structure similar to ring 30.
In an alternative embodiment, shown in FIG. 18, an air cartridge 340 is used to variably increase or decrease elevation. One end of the air cartridge 340 is connected to a switch mechanism 342, which allows a user to select increased elevation or decreased elevation. The air cartridge 340 is also connected to tubing 344, which is inserted into housing 346. As shown in FIG. 18, the housing 346 holds the modified base block 20 and allows the base block 20 to move vertically about the housing 346 as the air pressure in the housing is increased or decreased. Alternatively, an air bladder 348 can be installed in the housing 346 and connected to the tubing 344. As the pressure in the air bladder 348 expands, it causes the air bladder 348 to impinge upon the base block 20, thereby pushing it upward. Instead of a switch, a button may be used to actuate the air cartridge 340.
In an alternative embodiment, shown in FIG. 19, an adjustment screw 354 is used to vary the height of base block 20. Springs 356 and 358, secured to housing 352, press upward on base block 20. Adjustment screw 354 raises or lowers the base block 20 by increasing or decreasing the compression of the springs 356 and 358.
In an alternative embodiment, shown in FIG. 20, a motor 360 is coupled with gear mechanism 362, which in turn is mechanically coupled with base block 20. A switch 364 is also coupled with the motor 360 so that a user can selectively adjust the elevation. If the user desires increased elevation, the motor 360 is actuated via the switch 364 and drives the base block 20 upward about the housing 366. Likewise, the user can selectively decrease the elevation via the switch 364, which actuates the motor 360 in the opposite direction, thereby lowering the base block 20.
FIG. 21 illustrates another embodiment of the present invention. The base block 20 is inserted over housing 370, which contains at least one track (preferably two) of holes or notches 372. Spring-loaded pins 374 in base block 20, when in the actuated position, mechanically engage the holes 372 in the housing 370, thereby holding the base block 20 firmly within the housing 370. A user can adjust the elevation up or down by pulling on the spring-loaded pins and moving the base block 20 upward or downward. Once the appropriate elevation is selected, the pins 374 are released, thereby engaging with the holes 372 in the housing 370 to secure the base block 20.
In an alternative embodiment, shown in FIG. 22, base block 20 rests on housing 382, which includes an air-control valve 384, air chamber or bladder 386, air discharge means 388, and optional support member 390. The base block 20 may be raised by the user depressing air-control valve 384, which increases the air in the air chamber or bladder 386. As the pressure in air chamber or bladder 386 increases, it impinges upon the bottom surface of the base block 20, thereby pushing it upward. The base block 20 can be lowered by depressing the air discharge means (similar to a piston of an ordinary bicycle tire inner tube) to evacuate the air and thereby decrease the upward pressure on the base block 20.
In an alternative embodiment, shown in FIG. 23, base block 20 is supported on support block 902 and may be raised by a lever mechanism similar to the means commonly used to raise and lower wheels of lawn mowers. The base block 20 includes a surface 906 with teeth 908 attached to it at varying heights. As illustrated in FIG. 23, lever 904 includes a slot matching the teeth 908 of the base block 900 and can be rotated to be secured to the various teeth 908. The height of the base block 20 is adjusted be altering the position of the lever 904.
In another embedment of the present invention, shown in FIG. 1, an optional centerpiece 60 is connected to the base blocks 20 so that all three elements form a substantially rigid structure. The centerpiece 60 is the structure that connects the two base blocks 20. In one alternative embodiment, the base blocks 20 and centerpiece 60 form a single member. In another embodiment, the centerpiece 60 is removable from the base blocks 20. The inclusion of the centerpiece 60 allows for the installation of both legs 204 of the bed 200 into the base blocks 20 nearly simultaneously. Without centerpiece 60, legs 204 of the bed 200 must either be installed one after another or both the base blocks 20 must be placed independently in the appropriate position next to legs 204 prior to installation. The embodiment with a centerpiece 60 presents an advantage to the user, particularly a parent holding a small child, in that the user can install the elevator 10 by lifting the bed 200 only once and using a foot to position the base blocks 20 appropriately.
Turning to FIG. 4, the bottom surface 72 of the centerpiece 60 is shown. The centerpiece 60 may optionally include a non-slip surface 70 and slots 62 (only one shown) for securing to variable elevation blocks 86. FIG. 11 illustrates a side view of the centerpiece 60 secured to the base block 20. As shown in the figure, the centerpiece 60 in this embodiment has notches or studs 68, which protrude through slots 34 in the base block 20 (or slots 414 in base block 400 shown in FIG. 9), thereby securing the centerpiece 60 over the base block 20. In the preferred embodiment, the ends of the centerpiece 60 are substantially rounded to avoid creating a straight edge where the centerpiece 60 is secured to the base blocks 20.
Alternatively, the centerpiece 60 may be attached to the base block 20 by fasteners, latches, or clips. In another embodiment, the width of the centerpiece 60 is slightly larger than inner side 26 of the base block 20 so that the centerpiece 60 fits snugly over the base block 20. Other embodiments include the use of a hinge and pin mechanism similar to a common door hinge and the inclusion of grooves, slots, or notches in the base block 20 to which the centerpiece 60 fits snugly. An apparatus similar to a door handle may also be used. One skilled in the art will appreciate a multitude of different mechanisms and manners in which the centerpiece 60 can be secured to the base blocks 20. The precise manner in which the centerpiece 60 is secured to the base blocks 20 is not material to the invention so long as they can be moved substantially simultaneously by pushing on the centerpiece 60.
The centerpiece 60 may be a fixed predetermined length such as to accommodate a bed 30-inches in width or it may be adjustable to accommodate a variety of bed widths. In the preferred embodiment, the length of the centerpiece 60 is adjustable and includes two sleeves. FIG. 10 illustrates this embodiment, which includes one sleeve 74 that is slightly larger than the other sleeve 76 so that the narrower sleeve 76 can slide axially about the wider sleeve 74. The length of the centerpiece 60 can be adjusted by pulling or pushing the sleeves together.
In another embodiment, as shown in FIG. 12, the alternative centerpiece 60A includes outer sleeves 64 and inner shaft 66, to allow the length of centerpiece 60A to be adjusted. Outer sleeves 64 are slidably secured about inner shaft 66 such that the length of the centerpiece 60 may be adjusted by sliding the outer sleeves axially about inner shaft 66. Other manners in which the centerpiece 60's length may be adjusted are through the use of a series of blocks that interlock together allowing the user to selectively modify the length by choosing an appropriate number of blocks; two or more interlocking sleeves that may be contracted or expanded axially (telescopically) by exerting force on the ends of the centerpiece 60; and a honeycomb style centerpiece 60 that has the ability to flex to a desired length. Yet another manner in which the length of the centerpiece can be varied is by employing more than one centerpiece 60 of differing predetermined fixed lengths. For example, a user can increase or decrease the width of an elevator 10 employing a centerpiece 60 by substituting the current centerpiece 60 in use with another of a different length. One skilled in the art would appreciate the multitude of different mechanisms and manners through which the width of the centerpiece 60 may be adjusted.
The embodiment of the invention employing a centerpiece 60 is not limited to a centerpiece 60 connected to the inner side 26 of the base block 20. FIG. 27 illustrates a centerpiece 60 connected to base blocks 20 in the well 22 as opposed to the inner side 26. The centerpiece 60 may be connected to the base blocks 20 in any fashion, including by connection to the outer sides 24, bottom surface 80, or upper surface 42. However, it is preferred that the centerpiece 60 and base blocks 20 compose a reasonably rigid structure so that a user may move the base blocks 20 and centerpiece 60 by exerting force on any of the components.
Another embodiment of the bed elevator 10 is illustrated in FIG. 28. As shown, alternative base blocks 500 include an upper surface 502, an outer surface 504, and a well 506, which accepts the leg 204 of the bed 200. Each base block 500 also includes an inner side 508, which contains a hollowed portion. Centerpiece 550 is placed inside the inner side 508 of each base block 500. The width between the base blocks 500 can be adjusted by sliding the blocks over the centerpiece 550 allowing the width to be variably adjusted by the user. This embodiment can also include an optional mechanism, such as snaps, tabs, levers, and the like (not shown), to lock the base blocks 500 about the centerpiece 550.
Yet another embodiment of the bed elevator 10 is illustrated in FIG. 29. Base block 600 includes an inner side 602, a well 604 for accepting the leg 204 of the bed 200, and an outer side 606. Base block 610 includes an inner side with a cavity 612, a well 614 for accepting the leg 204 of the bed 200, and an outer side 616 (not shown). The inner side 602 of base block 600 is smaller in area than the cavity 612 of base block 610. This allows the inner side 602 of base block 600 to slide inside the cavity 612 of base block 610 making a substantially rigid structure.
Alternative base blocks 500 and 600 may incorporate the features of base blocks 20 and 400, including the inclusion of variable height adjustment blocks 86; additional variable height adjustment means including those illustrated in FIGS. 13-23; and substantially flat, recessed, sloped, or notched/grooved upper surfaces as illustrated in FIGS. 8 and 24A-24C. If the latter structure is employed, a well 22 is not preferable.
The preferred embodiment of the present invention can be used according to the following steps. First, the user determines the appropriate tilt angle desired and the corresponding elevation height. The user then determines whether the base block 20 will provide the desired elevation height or whether one or more variable elevation blocks 86 are to be used alone or in combination with the base block 20. Second, the user lifts the end of the bed to be elevated. Third, the user places the base blocks 20 beneath the legs 204 of the bed to be elevated. If the preferred embodiment is used, the user may place both base blocks 20 simultaneously by aligning the centerpiece 60 to the appropriate location. If an embodiment of the invention is used without a centerpiece, the user will initially place the base block 20 next to one of the bed legs 204 and lower the bed, while pushing the base block 20 into place. The user then lifts the bed a second time to install the second base block 20. Fourth, the user should ensure that the bed legs 204 are securely installed in the wells 22 of the base block 20 by shaking the bed or otherwise verifying its stability. The height of the bed elevation can later be adjusted by the means discussed above, including adding or removing the variable elevation blocks 86 from the base blocks 20.
The primary advantage of the present invention is that it provides a system and apparatus for reliably and securely elevating a bed. Another advantage of the present invention is that it provides a means by which the elevation height and tilt angle can be variably selected according to the user's desire. Other advantages of the present invention include, the use of rounded edges and padding to enhance the safety of the elevator for use around small children and toddlers. Yet another advantage is that both base blocks 20 can be installed substantially simultaneously through use of a centerpiece 60 secured at each end to a base block 20. This eliminates the need to install each base block 20 separately, which may require the user to lift the bed more than once.
It should be apparent from the foregoing that an invention having significant advantages has been provided. While the invention is shown in only a few of its forms, it is not just limited, but is susceptible to various changes and modifications without departing from the spirit thereof.

## Claims

1. A system for elevating a bed having a support structure and resting on a surface, the system comprising:
two base blocks, each base block having
a bottom surface, and
an upper surface for supporting the support structure of the bed, wherein each base block is adapted to be adjusted such that the distance between the surface and the upper surface of each base block may be adjusted independent of the distance between the surface and the upper surface of the other base block; and

a centerpiece having two ends, each end connected to one of the base blocks.

2. The system of claim 1, wherein the upper surface of the base blocks is substantially flat.

3. The system of claim 1, wherein the upper surface of the base blocks contains a recessed area.

4. The system of claim 1, wherein the centerpiece includes a means for variably adjusting the length of the centerpiece.

5. The system of claim 1, wherein the centerpiece is comprised of an inner sleeve and outer sleeve, each having an axis, the inner sleeve adapted to fit within the outer sleeve and capable of being slid along the axis of the outer sleeve to variably adjust the length of the centerpiece.

6. The system of claim 1 further including a means for variably adjusting the elevation of the bed.

7. The system of claim 1, wherein the base blocks and centerpiece form a single structure.

8. The system of claim 1 further including a means for variably adjusting a tilt angle of the bed.

9. A system for elevating a bed having a support structure and resting on a surface, the system comprising:
two base blocks, each base block having
a bottom surface, and
an upper surface for supporting the support structure of the bed, wherein the upper surface is non-horizontally sloped; and

a centerpiece having two ends, each end connected to one of the base blocks.

10. A system for elevating a bed having a support structure and resting on a surface, the system comprising:
two base blocks, each base block having
a bottom surface, and
an upper surface for supporting the support structure of the bed, wherein the upper surface of the base block contains a grooved area; and

a centerpiece having two ends, each end connected to one of the base blocks.

11. A system for elevating a bed having a support structure and resting on a surface, the system comprising:
two base blocks, each base block having
a bottom surface, and
an upper surface for supporting the support structure of the bed; and

a centerpiece having two ends, each end connected to one of the base blocks, wherein the centerpiece is selected from two or more centerpieces of varying lengths.

12. A system for elevating a bed having a support structure and resting on a surface, the system comprising:
two base blocks, each base block having
a bottom surface, and
an upper surface for supporting the support structure of the bed, and
a height adjustment block adapted to be placed between the base block and the surface to adjust the height of the bed to a selected level; and

a centerpiece having two ends, each end connected to one of the base blocks.

13. A system for elevating a bed having legs and resting on a surface, the system comprising:
two base blocks, each base block having
a bottom surface,
an upper surface,
a well, having side walls and a bottom surface, formed within the upper surface for accepting the leg of the bed, and
a height between the bottom surface of the base block and the bottom surface of the well; and

a centerpiece having two ends, each end connected to one of the base blocks,
wherein the centerpiece and base blocks are adapted so that the height of each base block may be adjusted without adjusting the position of the centerpiece relative to the bottom surface of the base blocks.

14. The system of claim 13, wherein the centerpiece includes a means for variably adjusting the length of the centerpiece.

15. The system of claim 13, wherein the means for variably adjusting the length of the centerpiece includes a centerpiece comprised of an inner sleeve and outer sleeve, the inner sleeve adapted to fit within the outer sleeve and capable of being slid along the axis of the outer sleeve to variably adjust the length of the centerpiece.

16. The system of claim 13 further including a means for variably adjusting the elevation of the bed.

17. A system for elevating a bed having legs and resting on a surface, the system comprising:
two base blocks, each base block having
a bottom surface,
an upper surface, and
a well, having side walls and a bottom surface, formed within the upper surface for accepting the leg of the bed;

a centerpiece having two ends, each end connected to one of the base blocks; and
a height adjustment block adapted to be placed between a base block and the surface to adjust the height of the bed to a selected level.

18. The system of claim 13, wherein the base block further includes a ring secured to the bottom surface of the well for accepting a roller, ball, or coaster of the bed leg.

19. The system of claim 13, wherein the base block further includes a slot formed in the bottom surface of the well for accepting the leg of the bed.

20. The system of claim 13 further including a means for variably adjusting the elevation of the bed and wherein the centerpiece includes a means for variably adjusting the length of the centerpiece.

21. The system of claim 13, wherein padding is disposed on the base block.

22. The system of claim 13, wherein the base block further includes a non-slip surface disposed on the bottom surface of the base block.

23. The system of claim 13, wherein the edges of the base block are substantially rounded.

24. The system of claim 13, wherein the base blocks and the centerpiece form a single structure.

25. The system of claim 13 further including a means for variably adjusting a tilt angle of the bed.

26. An apparatus for elevating a bed having legs and resting on a surface, the apparatus comprising a base block having:
a bottom surface;
an upper surface, smaller in area than the bottom surface;
an outer surface, in contact with the bottom surface and the upper surface, the outer surface sloped from the upper surface to the bottom surface; and
a well, having side walls and a bottom surface, formed within the upper surface for accepting the leg of the bed, wherein exposed edges formed by interfaces of the bottom surface, outer surface, upper surface, and well are substantially rounded.

27. The base block of claim 26 further including a means for variably adjusting the elevation of the bed.

28. The base block of claim 26 further including one or more height adjustment blocks adapted to be placed between the base block and the surface to adjust the height of the bed to a selected level.

29. The base block of claim 26 further including a non-slip surface disposed on the bottom surface.

30. The base block of claim 26 further including a ring secured to the bottom surface of the well for accepting a roller, ball, or coaster of the bed leg.

31. The base block of claim 26 further including a slot formed in the bottom surface of the well for accepting the leg of the bed.

32. The base block of claim 26 further including padding disposed on the outer surface of the base block.

33. The base block of claim 26 further including a means for adjusting a tilt angle of the bed.

34. A system for elevating a bed having a support structure and resting on a surface, the system comprising:
a first base block having a bottom surface, an upper surface for supporting the support structure of the bed, and an inner side; and
a second base block having a bottom surface, an upper surface for supporting the support structure of the bed, and an inner side with a cavity formed therein for accepting the inner side of the first base block.

35. The system of claim 34 further including a means for variably adjusting the elevation of the bed.

36. The system of claim 34 further including a height adjustment block adapted to be placed between a base block and the surface to adjust the height of the bed to a selected level.

37. The system of claim 34, wherein the base blocks form a single structure.

38. A system for elevating a bed having a support structure and resting on a surface, the system comprising:
two base blocks, each base block having
a bottom surface, and
an upper surface for supporting the support structure of the bed; and

a centerpiece having two ends, each end connected to one of the base blocks, wherein the centerpiece is comprised of a single member and the two base blocks are comprised of separate members detachably connected to the centerpiece.