Boots – shoes – and leggings – Orthopedic boot or shoe with corrective element – With means to turn foot about its long axis
Reexamination Certificate
1999-07-06
2001-08-07
Kavanaugh, Ted (Department: 3728)
Boots, shoes, and leggings
Orthopedic boot or shoe with corrective element
With means to turn foot about its long axis
C036S140000
Reexamination Certificate
active
06269554
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a combined pronation and supination control plantar insert for shoes.
From a functional point of view, the foot behaves like a propeller whose blades are constituted by the hindfoot and the forefoot.
The rolling action of a step can be seen as consisting of three phases: a first contact phase, a second resting phase and a third propulsion phase.
During the first contact phase, the foot tends to pronate and therefore arrange itself inward; during the second resting phase, the foot stiffens and tends to supinate, so that the weight tends to shift toward the outer part of the foot; during the third propulsion phase, the foot is in a central position with a slight pronation in order to give impetus to the step.
All these movements of the foot can be considered equivalent to the motion of a propeller.
Therefore, depending on the motion of the blades, the foot relaxes and flattens or stiffens and therefore becomes hollow.
These two relaxation and stiffening phases are the two movements that occur alternatively in the foot during upright posture, running and jumping, and are known as pronation and supination respectively.
The deformities commonly known as flatfoot and hollow foot are due to predominant or persistent pronation (flatfoot) or supination (hollow foot).
Ready-made plantar inserts are commercially available in order to control the movement of the foot but they are usually scarcely useful.
Their use is often discretionary and can cause damage if said plantar inserts are incautiously worn by careless users.
Customizable plantar inserts manufactured by specialized technicians are an altogether different matter.
In this case, the final product is customized and perfectly matches the foot of the patient.
However, this requires the aid of labor-intensive techniques (plaster cast of the foot and creation of a complementary shape, assembly of different materials, refinement of the complementary shape according to the defect to be corrected, etcetera) and accordingly entails long production times.
Costs are high and it is impossible to modify the configuration of said plantar inserts if changes in the foot and/or in the structure of the bones, joints and muscles occur.
All these are only some of the main problems of this kind of plantar inserts.
It should also be noted that the bad posture of the feet does not affect only the bone, joint and muscle structures of said foot, causing various localized disorders; it also affects the entire supra- and subsegmental posture; accordingly, alterations can occur which affect not only the foot and the joints closest to it (talocrural joint, coxofemoral joint, knee joint) but also more distal articulations (interchondral joints, costovertebral joints, etcetera).
Many of the alterations affecting the cervical column and related symptoms, reaching as far as the temporomandibular joint with consequences for mastication, can in all likelihood originate from the incorrect static and dynamic posture of the foot.
SUMMARY OF THE INVENTION
The aim of the present invention is to solve the above-described problem, eliminating the drawbacks of the cited prior art and thus providing a plantar insert which allows to correct the main defects or problems of the foot.
Within the scope of the above aim, an important object is to provide a plantar insert which not only allows to compensate and correct flat feet and hollow feet by controlling and/or correcting pronation and supination but also allows this correction in a progressive and gradual form, so as to make it more acceptable to the patient and adapted for the current configuration of his bone, joint and muscle structures, said gradualness of the correction being more important during the developmental period.
Another important object is to provide a plantar insert which can be manufactured in a short time and can be equally applied to the various cases of correction of the cited defects, thus allowing accurate customization for any possible specific case.
Another object is to provide a plantar insert which has low manufacturing costs and can be customized in a short time to the specific defect to be corrected for a single and specific user.
This aim, these objects and others which will become apparent hereinafter are achieved by a combined pronation and supination control plantar insert for shoes, characterized in that it comprises posture control means adapted to correct and/or modify the posture of the entire tendon, bone and muscle structure of the body.
Advantageously, said means are constituted by one or more elements which can move on one or more adjustable planes arranged in a chosen point of the plantar insert.
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patent: 1662814 (1928-03-01), Alfred
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patent: 2205753 (1940-06-01), Svrlinga, Jr.
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patent: 4546558 (1985-10-01), Perini
patent: 4909768 (1990-03-01), O'Brien
patent: 5090139 (1992-02-01), Germann
patent: 5404658 (1995-04-01), Rosen
patent: 2638617 (1990-05-01), None
patent: 2652260 (1991-03-01), None
patent: 780769 (1957-08-01), None
Buratto Alberto
Buratto Camillo
Silvestrini Bruno
Josif Albert
Kavanaugh Ted
Modiano Guido
O'Byrne Daniel J.
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