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The present invention relates generally to footwear, specifically and especially including shoes, and more particularly to footwear configured to mobilize the thick, web-like plantar fascia at both the origin and insertion of the ligament.
Whether through specific physical exertion or everyday wear and tear, a growing number of amateur athletes and working professionals across all age groups and backgrounds suffer from various forms of foot pain including overuse injuries specifically related to the plantar fascia ligament. The vast majority simply do not have the time, money, or expertise to take preventive or corrective measures to make sure their feet are healthy and pain-free.
Referring to
Most current footwear products attempting to prevent or relieve foot pain fail to address recurring problems, such as plantar fasciitis and morton's neuroma, by over-emphasizing cushioning and/or stabilization. At the same time, therapeutically effective professional massage and physical training solutions are costly and time-consuming. According to the American Podiatric Medical Association, 77% of adults in the United States ages 18 and older claim to experience recurring foot pain, but less than 30% seek professional help. The painful truth about recurring foot pain is that relief often requires weeks or even months of rest, rehabilitation, and possibly surgery followed by prolonged rehabilitation. Ultimately, the best way to address recurring foot pain is to actively prevent it in the first place.
Currently there are a number of sandals and slides in the marketplace from leading manufacturers that feature contoured cushioned footbeds, basic arch support, and other largely cosmetic features, including EVA foam and/or rubber pads and/or nodules designed to “massage” the underside of the foot. A widely-available technological development includes inserts and insoles featuring contoured, cushioned, and/or “stabilizing” attributes that serve to secure, support, and/or stretch the underside of the foot, typically the arch.
However, to the knowledge of the present inventor, there are no known shoes in the marketplace featuring podiatric elements on the footbed surface that mobilize the plantar fascia at both its origin and insertion points.
It is a principal object of the present invention to provide a new and improved pair of shoes having podiatric elements that proactively mobilize the thick, web-like plantar fascia at both the origin and insertion of the ligament.
Unlike prior art solutions that serve only to cushion, stabilize, and/or “massage” the underside of the foot, the shoe slide of the present invention is specifically designed to mobilize and relax, stretch, and reduce impaction of the soft tissues of the feet through ordinary everyday use of the footwear. At the same time, the invention mitigates and potentially obviates time-consuming physical therapy exercises that are all too often poorly performed, forgotten, or ignored by users.
The invention's unique technological principle involves applying targeted pressure stimulation to the underside of the foot while relying on an individual's body weight and natural movements to mobilize targeted muscle groups and related connective tissue. In doing so, the invention lowers the risk of injury associated with artificial external pressures issued by weight and core/balance training that may strain targeted muscles and/or joints. In conjunction with a healthy and safe training and recovery regimen, the invention automatically adjusts with improvements to a user's weight to continually mobilize and condition feet.
The invention is specifically designed to help prevent recurring foot pain, including conditions like plantar fasciitis and morton's neuroma. Through targeted pressure stimulation along the underside of the foot, this invention mobilizes muscles and connective tissue with every step. Recommended use includes wearing before and/or after extended activity involving feet, including cross-training, running, standing, swimming, and cycling. Over the first few days of use, users should work their way up to wearing 15-20 minutes once or twice daily.
The disclosed invention is an article of footwear with uniquely shaped, sized, and positioned podiatric elements that proactively mobilize the thick, web-like plantar fascia at both the origin and insertion of the ligament. The specifications set out in the detailed description below for the heel cup, rounded rubber protrusion, and raised metatarsal pad, preventively stimulate (repeatedly stretch and release) the origin of the plantar fascia at the calcaneal tubercle and at its insertion point at the proximal phalanges of the toes at the metatarsophalangeal joint, which are most often injured and/or damaged from overuse injuries.
The invention will be better understood and objects other than those set forth above will become apparent when consideration is given to the following detailed description thereof. Such description makes reference to the annexed drawings wherein:
Referring now to
Looking at
While users may experience varying degrees of pressure at the heel and under the metatarsal bones and the toes, similar to a deep-tissue massage, to best utilize the tissue stretch and stimulation induced, the invention is optimally used by wearing the slides before and/or after any extended activity for 15-20 minutes at least once a day. Initially, users may need to wear the slides a few minutes each day as they become more comfortable with the sensation, specifically at the forefoot and arch (where it attaches to the heel bone), and as their feet begin to demonstrate more mobility.
Through targeted pressure stimulation along the underside of the foot, the shoe slide invention mobilizes muscles and connective tissue with every step. Recommended use includes wearing before and/or after extended activity involving high impact footwork, including cross-training, running, standing, cycling, even swimming.
The rounded rubber protrusion 18 and the raised EVA metatarsal pad 22 (considered more fully below) are located on the footbed to effectively engage the typical locations of the origin and insertion of the plantar fascia (arch band) ligament of a wearer's foot. Data show that a generalized formula may be employed to locate the rounded rubber protrusion and the raised EVA metatarsal pad.
The outsole 24, also EVA or another suitably durable resilient material with comparable properties when employed in footwear, may be configured according to the market and uses to which the shoe may be put, above and beyond those of strictly therapeutic use. Accordingly, the outsole design shown in
Material choices complement the podiatric objectives of the shoe. For instance, the EVA footbed 12 is fabricated from EVA 55 shore C foam sheets; the footbed liner 12a, from EVA 35-40 shore C; the rounded rubber protrusion from 55-60 shore A; the two-ply strap from plastic (outer layer) and breathable mesh (inner layer).
As will be appreciated, the strap configuration is also a matter of design choice, and an alternative design is shown in
Referring next to
Referring now specifically to
The following specifications and dimensions are directed to the two differentiating features of the present invention: the raised EVA metatarsal pad and the rounded rubber protrusion.
Again, using a men's shoe size 11 as a basis for measurement, the diagonal intersection point 34 is about 17.7 cm from the top edge (toe) 30 of the footbed to intersection point 34 on the fore portion of the functional midline 36; 11.1 cm from the intersection point to the antapex 38 at the bottom edge 39 of the footbed (heel) on the heel portion of the functional midline 40, thus totaling the approximate 288 mm of a US size 11 shoe.
Using a right shoe/slide as a basis for measurement, and with all measurements taken along the functional midlines 36/40, in a top plan view the raised EVA metatarsal pad has a rounded triangle (akin to a guitar-pick or corn kernel shape), and it is about 5.7 cm in its longest dimension and 4.5 cm in width. It is divided into medial and lateral portions 22a, 22b, by the forefoot portion of the functional midline 36.
The circumferential edge or boundary 22c of the metatarsal pad 22 has an innermost point (i.e., a most medial point) 22d along the circumferential edge, an outermost point (most lateral point) 22e along the circumferential edge, and a foremost point 22f along the circumferential edge. Connecting the innermost point 22d and the outermost point 22e with a forefoot lateral line 25 normal to the functional midline, the innermost point 22d of the metatarsal pad may be positioned approximately 2 cm from the closest point 42a on the interior (medial) edge 42 of the footbed (or approximately 22% of the total width of the footbed at line 25), and the outermost point 22e may be positioned approximately 2.6 cm from the closest point on the exterior (lateral) edge 44a of the footbed (or approximately 28.6% of the width of the footbed at forefoot lateral line 25). Thus, the metatarsal pad itself is approximately 50% of the width of the footbed along line 25. It is approximately 10.3 cm from the apex 30 of the top edge 31 of the footbed as measured along the forefoot functional midline 36 (or 35.8% of the length of the functional midlines combined).
As shown in the views, the metatarsal pad extends as an elongate rounded triangular hemispherical dome from a cut out 22A in the EVA footbed liner and protrudes approximately 4 mm above the upper surface of the footbed liner (approximately 8 mm above footbed) with a 2 mm inward taper. [Note that the lateral dimensions use a standard medium width for a men's size 11 shoe. All measurements may be adjusted and thus calculated proportionally to size changes in both the length and width dimensions.]
Considered with the same bases for measurement, but with measurements taken along the heel portion of the functional midline 40, as well as a hindfoot lateral line 35 normal to the heel portion of the functional midline and extending through the center of the rounded rubber protrusion 18, the rounded rubber protrusion is a hemispherical element that may be approximately 2.3 cm in diameter, and it may be positioned 2.5 cm from the closest point 42b on the medial edge 42 of the footbed to the medial edge 18a of the protrusion (or approximately 33% of the width of the footbed at hindfoot lateral line 35), 2.7 cm from the lateral edge 18b of the rounded rubber protrusion 18 to the nearest point 44b of the lateral edge 44 of the footbed (or approximately 36% of the width of hindfoot lateral line 35). Thus, the rounded rubber protrusion comprises approximately 31% of the width of the footbed along hindfoot lateral line 35. and it extends through a cut-out of EVA footbed liner to project above the upper surface of the footbed at approximately 8 mm above the footbed liner (1.2 cm above the footbed) with a taper to 0 mm.
Still using the same bases for dimensions, additional diagonal measurements include: 3.7 cm from the bottom edge of the metatarsal pad to the rounded rubber protrusion along functional midline 36; it is 19.8 cm from the top edge of the footbed (where the functional midlines originate at the forefoot portion of the footbed, to the top edge of the rounded rubber protrusion 18.
Further measurements: The EVA footbed liner rises 4 mm above the EVA footbed (i.e., a thickness of approximately 4 mm); the raised arch extends to 2.5 cm above the 4 mm footbed liner (2.9 cm total above the footbed); the heel cup 20 rises 1.5 cm from the top of the footbed, not including the footbed liner. The strap dimensions vary according to footbed sizing. All sizes are approximate and may be tailored to the specific shore hardness of the materials and material layers to produce the desired therapeutic and prophylactic (injury/pathology prevention) effect.
The above disclosure is sufficient to enable one of ordinary skill in the art to practice the invention. While there is provided herein a full and complete disclosure of the preferred embodiments of this invention, this disclosure does not limit the invention to the exact construction, dimensional relationships, and operation shown and described. Various modifications, alternative constructions, changes, structural and material equivalents in properties and performance will readily occur to those skilled in the art and may be employed, as suitable, without departing from the true spirit and scope of the invention. Such changes might involve alternative materials, components, structural arrangements, sizes, shapes, forms, functions, operational features or the like.
The present application claims the benefit of the filing date of U.S. Provisional Patent Application Ser. No. 63/202,537, filed Jun. 15, 2021 (Jun. 15, 2021), which is incorporated in its entirety by reference herein.
Number | Name | Date | Kind |
---|---|---|---|
1675711 | Jones | Jul 1928 | A |
1741419 | Jones | Dec 1929 | A |
1746002 | Lobel | Feb 1930 | A |
1976441 | Feldman | Oct 1934 | A |
2148974 | Wysowski | Feb 1939 | A |
2157026 | Sochor | May 1939 | A |
2486653 | Hukill | Nov 1949 | A |
2510654 | Pepin | Jun 1950 | A |
2546408 | Riggs | Mar 1951 | A |
2613455 | Amico | Oct 1952 | A |
2680919 | Riggs | Jun 1954 | A |
2863231 | Jones | Dec 1958 | A |
3063458 | Scholl | Nov 1962 | A |
4109661 | Fukuoka | Aug 1978 | A |
4932141 | Hones | Jun 1990 | A |
5784811 | Mauch | Jul 1998 | A |
5787608 | Greenawalt | Aug 1998 | A |
6163983 | Van Niekerk | Dec 2000 | A |
10609981 | Phinney | Apr 2020 | B1 |
20040103558 | Everz | Jun 2004 | A1 |
20090205222 | McLinden | Aug 2009 | A1 |
20140259755 | Tsai | Sep 2014 | A1 |
20150026998 | Lin | Jan 2015 | A1 |
20160227879 | Haselaars | Aug 2016 | A1 |
20160235156 | Stumpf | Aug 2016 | A1 |
20170006961 | Pedersen | Jan 2017 | A1 |
20220183419 | Pham | Jun 2022 | A1 |
Number | Date | Country | |
---|---|---|---|
20220395048 A1 | Dec 2022 | US |
Number | Date | Country | |
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63202537 | Jun 2021 | US |