Adjustable Equine Boot Rocker Attachment

Abstract

A “rocker” attachment for an equine boot with an adjustable shaped structure that attaches to the underside of a sole of an equine boot and allows the boot to rock forward—break-over—when tilted, as by movement of the equine leg, thus allowing the equine to find a naturally comfortable position.

Description

BACKGROUND

Field of Invention

This invention relates to equine boots and more specifically to adjustable rocker attachment(s) for equine boots.

Background

In the treatment of equine hoof and leg maladies, especially laminitic equine, it is considered important to provide means to allow the equine to be able to reduce hoof pressure from sharp break-over of the hoof when walking and to allow it to find its own most comfortable standing position. This can be accomplished by so called “rocker” shoes. One commercial shoe that has found acceptance is sometime called a “banana” or “rocker” shoe or clog. This is a shoe that is shaped to allow break-over adjustment by a “rocker” effect of the sole of the hoof so that the horse can more easily find a comfortable position—by adjusting the palmar/planar angle to take pressure and stress off affected areas of the hoof. The “Clog” is a shoe developed by Dr. Micheal L. Steward, DVM of Oklahoma is one of the first to use the concept of a self-adjusting in a wooden shoe that is screwed and/or glued directly to the hoof. Adaptations of the Stewart Clog have been made of other than wooden materials. These shoes, while somewhat effective are generally attached directly to the hoof and are not, therefore, easily changed or adjusted without damage to the hoof. Another rocker attachment for equine boots is described in US published application US 2015/0325944, filed Jul. 17, 2015, the disclosures if which are incorporated herein by reference.

The present invention is an adjustable rocker attachment and boot assembly that is efficient, easily applied without the assistance of an expert farrier and can be utilized directly by an equine owner or its veterinarian.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a top view of an embodiment of a structure of the invention.

FIG. 1A is a bottom view of an embodiment of a structure of the invention.

FIG. 2 is a top view of an embodiment of a structure of the invention.

FIG. 2A is a bottom view of another embodiment of a structure of the invention.

FIG. 3 is a perspective view of an embodiment of a structure of the invention attached to an equine boot to form an assembly.

FIG. 4 is a perspective view of another embodiment of a structure of the invention attached to an equine boot to form an assembly.

FIG. 5 is a side view of an assembly of an embodiment of the invention with a bladder wedge in an uninflated condition.

FIG. 6 is a side view of an assembly of an embodiment of the invention with a bladder wedge in a partially inflated condition.

FIG. 7 is a side view of an assembly of an embodiment of the invention with a bladder wedge in more inflated condition.

DETAILED DESCRIPTION OF EMBODIMENTS

The “rocker” attachment of the present invention comprises an attachable adjustable shaped structure that attaches to the underside of the sole of an equine boot. It allows the boot to rock forward—break-over—when tilted, as by movement of the equine leg, thus allowing the equine to find a naturally comfortable position. Unlike “rocker” attachment structures that are fixed in shape, the structure of the present invention is adjustable in shape by use of an inflatable bladder disposed on the top side of the structure between the structure and the underside of a boot sole. Horses that are lame, by laminitis or otherwise, will naturally seek a comfortable standing position. When standing, walking or running the horse will greatly benefit from the ability of the boot, and thereby the hoof, to roll forward or backward without unnecessary bending that puts pressure on the toe of the hoof. The “rocker” attachment and boot of the present invention accomplices that. By moving the break-over (lever-arm of the hoof) back from the front of the hoof, pressure is unloaded from the hoof wall so that the hoof lamina does not have to do all the work of holding the bony column of the hoof and leg to the furthest point out toward the front of the hoof. Without a rocker shoe or boot the pressure in on the front hoof wall when the hoof is tilted forward. Break-over, as the term is used herein, is the last point of the hoof or shoe to come off the ground when the horse is moving. The further forward the break-over is, the more levering affect there is placed on the foot and potential strain on the entire back portion of the limbs. The adjustable “rocker” structure can be very suitably coupled with equine boot assemblies having an elastomer gel orthotic pad and is especially effective when coupled with an equine exercise boot assembly such as that of U.S. Pat. No. 8,291,683, issued Oct. 23, 2012, the disclosure of which is incorporated herein by reference.

In broad scope the adjustable “rocker” structure of the present invention is a shaped structure, preferable with the underside sloped from the center to the front and rounded at the rear, having an inflatable bladder (wedge) disposed on the top side, optionally in a recess (cavity) in the top side of the structure.

Referring to the Figures, FIG. 1 is a top view of an embodiment of a structure of the invention. FIG. 2 is a bottom view. The structure 100 has an elastomeric body 102 with tabs 106, 108, 105 and 107. There are at least three tabs and preferably four or more. It is preferred that the tabs be integral with the body of the structure as shown but they may also be attached as separate pieces. They may be attached by adhesive, by threading through slots in the top portion of the body or any other suitable means. However, they must be elastic. The structure is made of an elastic polymer that must be sufficiently hard to withstand wear and must be sufficiently elastic (stretchable) to allow it to stretch as required (as discussed below). An elastomer of Shore A hardness of about 70 to 100, with 80 to 95 is especially suitable. It is essential that the structure have at least about 400% elasticity (can be stretched to 4 times its original length). Elasticity of about 400% to 800% is desirable. These values are definitional and not merely a selection from a known range of values (there is no known range). A prototype was made with a polyurethane polymer having a Shore A of about 90 and elasticity of 680%. The tabs are shown attached to the structure in the 1, 11, 5 and 7 clock position. This arrangement is very suitable for attachment to front and rear side walls of a boot. Other tab locations (as on the sides) may also be used. In a prototype, tabs one inch long (measured from the body of the structure) and one inch wide were used. Other sizes are suitable. FIG. 1A shows a patterned (135) underside of the structure. Patterning is desirable to provide a good grip of the structure on the ground surface when the structure is use. A very suitable patterned design for the underside of the structure is shown in FIG. 10 and in Design Pat. D565,256, issued Mar. 25, 2008, the disclosure of which is herein incorporated by reference. This pattern design allows for excellent traction by the slanted ridges on the front and rear of the sole and more flexibility in the center. This flexibility provides more comfort for a horse with an injured or diseased hoof. Other designs and cleat arrangement will be well within the skill on those in the art.

Also shown in FIGS. 1 and 1A is an inflatable rocker attachment bladder (or bag) wedge, 104, that is used to adjust the shape of the structure. The bladder (wedge) has a connection 112 and conduit 110 to allow filling and release of filling fluid. There is also provided a valve 121. The bladder as shown is disposed in a recess (cavity) in the top side of the structure. This is desirable but not essential for the invention. The valve connection as shown is arranged to exit the structure at the rear. In some embodiments it is preferred that the conduit exit the side of the structure to allow it to be attached to a conduit along the side of a boot.

The bladder wedge is a flexible bladder or bag that may be expanded by injecting fluid or gas and has an outlet conduit connection 112 and conduit 110. A prototype was made on TPU coated fabric that was rf welded together to form an air tight bag. The bladder is disposed on the top side of the attachment (104 in FIG. 1). The bladder may also be molded into the attachment 100 as an integral bag-like space (container) in the pad. One or more bladders may be used. The location, shape and size of the bladder may be varied to provide the most effective action, which will vary with the condition of the hoof and the desired effect. While the invention has been described herein with the bladder located near the heel of the boot sole, bladder(s) may also be place under the middle or toe section or sides of the boot sole.

In general, the volume of the bladder will be sized from about one hundred (100) to about five hundred (500) mL (6.10-30.51 cubic inches); therefore, the amount of fluid required to inflate need not be great, and the pressure system can easily be battery powered and carried by the horse.

Required pressure to inflate the bladder is not excessive—pressures from nearly zero to about two hundred seven (207) kPa (0+ to 30 psi) are effective for inflating the bladder with pressures from about twenty-one (21) to one hundred thirty-eight (138) kPa (3-20 psi) being preferred. The suitable pressure required for any size and configuration can be easily tested and will generally be sufficient to expand about 0.5 to 1.5 inches.

The bladder will have at least one inlet port, 112, and conduit 110. Generally, only one port is required. When air or other gas is the pressurizing fluid the bladder can be both pressurized and depressurized by venting, as through a two-way valve, 121, or as through a conduit fitted with a pressure relief valve or other pressure relief means. The preferred valve, 121, type for the bladder inflation is those valves used in tires—Schrader or American valves or Presta valves. Presta valves are suitable and preferred for higher pressures and when the bladder is to remain inflated for longer periods of time. Both these valves types allow the bladder to be easily inflated with air (as from an air pump such as a customary tire pump) and easily deflated. They also aid in making the assembly lightweight and portable without the need for external power sources.

The structure is fitted on the underside of an equine boot sole as shown in FIGS. 5-7 where structure 102 is disposed on the underside of an equine boot 132 and the tabs 105,107,106 and 108 are folded up to attach the side wall, 134, of the boot sole. The tabs may be attached to the side wall by any suitable means including adhesive, hook and loop fasteners, brads or bolts and nuts. Barrel nuts placed inside and through the boot wall with bolts (109 and 103 of FIG. 2) on the outside make a very convenient detachable connection. The combination of the attachment structure, bladder wedge and boot, form the adjustable shape rocker attachment assembly of the invention. As can be seen by comparing FIGS. 5, 6, and 7 as the bladder is inflated the structure become more rounded to provide a more pronounced “rocker” shape. The elasticity of the structure and tabs allow them to stretch as the shape is changed by the inflated bladder while the structure remains firmly attached to the boot sole underside. Thus, by selection of the degree of bladder inflation the shape of the rocker structure is adjusted to a desired shape. Some practitioners believe that it is desirable to have a relatively flat structure (as with the at bladder uninflated) when an equine is at rest as at night but a more pronounced rounded shape when the equine is active. The more rounded shape make “break-over” smoother and improves the ability of an active equine to find a comfortable hoof position. Moreover, the adjustment allows practitioners to adjust the hoof angle of an injured hoof when treating for disease such as laminitis (as further discussed below). It is often helpful to have radiographs of the hoof at different adjustment shapes to judge the desired effect on the hoof.

An alternative structure with enlarged tabs are shown FIGS. 2, 2A and 4. The structure, 200, is as described in FIGS. 1, 1A and 2 except that the tabs are broadened. The structure has tab 206 in front, 207 and 205 in the rear and 208 and 209 on the sides of the body 202. The inflatable bladder 204 is disposed as in the structure of FIGS. 1, 1A and 2. The conduit 210 and fitting 212 and valve 221 are the same as described above. The tabs can be attached as described above including with barrel nuts and bolts 203,209,213 and 214. These broadened tabs help to prevent soil from getting between the structure and boot underside when in use.

In another embodiment the structure illustrated in FIGS. 2, 2A and 4 can be adapted to form a sandal that may be used with or without the inflatable bladder and without an equine boot as described herein. In this embodiment, the structure would be attached directly to an equine hoof and a secured by laces, hook and loop straps, adhesive or similar means to the equine hoof. The side tabs may also be fitted on the inside surface with one half of hook and loop straps set and attached to mating straps in a harness as described in U.S. Pat. No. 9,055,732, issued Jun. 16, 2015, the disclosure of which are incorporated herein by reference. See particularly, FIGS. 15-18 of U.S. Pat. No. 9,055,732

The invention is desirably coupled with a suitable equine boot to comprise an adjustable rocker/boot assembly. In one or more embodiments the boot assembly of the invention works very well with commercially available boot systems and very effectively with equine boots and boot/pad assemblies described in U.S. Pat. No. 7,178,321, issued Feb. 20, 2007, U.S. Pat. No. 7,445,051, issued Nov. 4, 2008, U.S. Pat. No. 8,166,734, issued May 1, 2012, U.S. Pat. No. 8,220,231, issued Jul. 17, 2012, U.S. Pat. No. 8,291,683, issued Nov. 23, 2012, U.S. Pat. No. 8,656,691, issued Feb. 24, 2014, U.S. Pat. No. 9,055,732, issued Jun. 16, 2015, 2014 U.S. Pat. Application No. 2015/0325944, U.S. Pat. Application No. 2015/,0119772, U.S. Design patents: D565256, issued Mar. 25, 2008, D62508, issued Mar. 25,2014, issued Mar. 25, 2008 D33013, issued Jul. 22, 2014 the disclosures of which are incorporated herein by reference. The sloped front and rear of the boot sole described in these patents and applications provides a more gentle and beneficial break-over than conventional shoes or boots. In some embodiments the sole of the boot is narrower in the front (as is generally preferred) lateral break-over is also enhanced. The present invention allows ready customization and adjustment of the break-over point.

In general, the boots described in the above patents and applications that are suitable for use with adjustable rocker attachment of this invention comprise an upper portion made from flexible material shaped to fit the hoof of an animal and of a height to reach above the hoof of the animal for which it is designed (see 132 and 142 of FIGS. 5-7). The boot have a front, sides, rear and bottom; the front slopes back and upward, the sides are lower than the front and rear so that when the front and rear are pulled together here is an opening in the sides. There is a fastening means at the top front and rear to fasten the front and rear together around the leg of a horse. The fabric bottom is attached to a more rigid sole plate comprising a molded elastomer base entirely circumscribed by a peripheral wall (or sides) defining a receiving area sized to fit over (or under) the bottom of the upper portion; said sole plate being securely attached to the lower circumference of the upper portion. The fabric bottom disposed in the molded base is beneficial as it facilitates attachment of an orthotic pad (136 and 138 of FIGS. 5-7) and provides a more rugged and trouble free boot structure. The adjustable attachment may also be attached to other commercial equine boots. In some commercial boots, the rear of the boot is open. In that case the tabs of the attachment would need to be disposed on the side, rather that front and rear of the attachment body.

U.S. Pat. No. 9,055,732 discloses an ice spa boot assembly that is also a suitable boot for use with the adjustable rocker attachment disclosed herein. The bladder wedge may be placed beneath the boot sole just as in the boots of the other identified patents and provides the added benefit of ice spa treatment with the heel lift of the present invention. The disclosure of U.S. Pat. No. 9,055,732 is incorporated herein by reference for all purposes.

The adjustable rocker attachment may be also be usefully coupled with the simulated exercise boot assembly of U.S. Pat. No. 8,291,683, issued Oct. 23, 2012, the disclosure of which is incorporated herein by reference.

Some practitioners working on laminitic horses like the pumping action of the simulated exercise boot (particularly if more than one bladder in the boot is used to provide pulsing in different areas of the hoof) but believe that there needs improved means to adjust the axis of the hoof as needed depending on the condition of the diseased hoof. The adjustable rocker attachment accomplishes that when coupled with the parented simulated exercise boot of U.S. Pat. No. 8,291,683

In use the adjustable rocker attached in attached to the underside of an equine boot as described above and the bladder inflated to adjust the structure shape as desired to accomplish a desired effect. Radiographs of the hoof during this procedure greatly facilitate accomplishment of desired goals.

In the foregoing specification, the invention has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes can be made thereto without departing from the broader spirit and scope of the invention as set forth in the appended claims. The specification and drawings are, accordingly, to be regarded as illustrative rather than a restrictive. Therefore, the scope of the invention should be limited only by the appended claims.

Claims

1. An adjustable rocker attachment structure for an equine boot comprising an elastomer body having a top side, underside, front, back and sides with at least three tabs extending from the sides of the elastomer body, wherein the elastomer body is constructed from an elastic polymer having a Shore A hardness of from about 70 to 100 and elasticity of at least 400% and having an inflatable bladder disposed on the top side.

2. The rocker attachment of claim 1 wherein the attachment top side has a cavity sized to accept the inflatable bladder.

3. The rocker attachment of claim 1 wherein the underside of the attachment structure is patterned.

4. The rocker attachment of claim 1 wherein the inflatable bladder has an inlet conduit and Schrader or Presta valve.

5. The rocker attachment of claim 1 wherein the structure has four tabs integral with the structure with two disposed on the rear section of the structure and two disposed on the sections of the structure.

6. An equine boot assembly comprising an equine boot having a flexible upper section and a base sole having a wall extending upward around its entire circumference attached to the flexible upper section, an elastomeric shock absorbing pad disposed inside the boot and an adjustable rocker attachment structure comprising an elastomer body having a top side, underside, front, back and sides with at least three tabs extending from the sides of the elastomer body, wherein the elastomer body is constructed from an elastic polymer having a Shore A hardness of from about 70 to 100 and elasticity of at least 400% and having an inflatable bladder disposed on the top side.

7. The assembly of claim 6 wherein the adjustable rocker attachment is attached to a side wall of the base wall by adhesive, brads or bolts and nuts

8. The assembly of claim 6 wherein the underside of the attachment structure is patterned.

9. The assembly of claim 6 wherein the inflatable bladder has an inlet conduit and Schrader or Presta valve.

10. An equine boot assembly comprising an equine boot having a flexible upper section and a base having a wall extending upward around its entire circumference attached to the flexible upper section, an elastomeric shock absorbing pad disposed inside the boot and having a pressure pulsing means disposed on, under or within the shock absorbing pad and an adjustable rocker attachment structure comprising an elastomer body having a top side, underside, front, back and sides with at least three tabs extending from the sides of the elastomer body, wherein the elastomer body is constructed from an elastic polymer having a Shore A hardness of from about 70 to 100 and elasticity of at least 400% and having an inflatable bladder disposed on the top side.

11. The assembly of claim 10 wherein the pressure pulsing means comprises a fluid pump, inlet valves to allow fluid to pass by conduit to each of multiple boot assemblies having pulsing means to inflate the pressure pulsing means to allow the fluid to flow to a reservoir, thus deflating the pressure pulsing means

12. The assembly of claim 10 wherein the adjustable rocker attachment is attached to a side wall of the base wall by adhesive, brads or bolts and nuts.

13. The assembly of claim 10 wherein the attachment top side has a cavity sized to accept the inflatable bladder.

14. The rocker attachment of claim 10 wherein the inflatable bladder has an inlet conduit and Schrader or Presta valve.

15. The assembly of claim 10 wherein the underside of the attachment structure is patterned.

16. An equine sandal comprising an elastomer body having a top side, underside, front, back and sides with at least three tabs extending from the sides of the elastomer body, wherein the elastomer body is constructed from an elastic polymer having a Shore A hardness of from about 70 to 100 and elasticity of at least 400%, wherein the side tabs have one half of an hook and loop strap set that mates with an opposite half of a hook and loop strap set attached to an equine leg harness described in U.S. Pat. No. 9,055,732.