Fluid filled insole
OwnerShirley C. Thedfordinventor
Life of this patent
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Abstract
An improved fluid filled insole is disclosed. One aspect of the improvement is the inclusion of openings to provide ventilation and to control flow of the fluid. The insole is formed of two superimposed sheets of flexible, fluid impervious material sealed together at selected sites to form an enclosure between the sheets capable of holding a fluid. Embodiments are disclosed wherein the openings lie on a transverse line underlying the ball of the foot, on a longitudinal line underlying the longitudinal arch of the foot, and on a transverse line underlying the heel. Another aspect of the improvement is the use of foam material enclosed between the sheets.
Claims13
An insole of a shoe comprising two super-imposed sheets of flexible, fluid-impervious material, each sheet being generally in the shape of a foot and including portions to underlie the ball, longitudinal arch and heel of the foot, with a plurality of openings passing through both sheets, said sheets being sealed together along a perimeter generally near the edges of the sheets, and sealed together around said openings, to form an enclosure between said sheets capable of holding a fluid, said enclosure being at least partially filled with a relatively incompressable liquid, with a plurality of said openings being arranged along a curved line so as to form a border of said longitudinal arch portion, thereby to direct flow of said liquid with respect to the longitudinal arch portion, said openings further providing ventilation through the insole.
An insole of a shoe comprising two superimposed sheets of flexible, fluid-impervious material, each sheet being generally in the shape of a foot and including portions to underlie the ball, longitudinal arch and heel of the foot, with a plurality of openings passing through both sheets, said sheets being sealed together along a perimeter generally near the edges of the sheets, and sealed together around said openings, to form an enclosure between said sheets capable of holding a fluid, said enclosure being at least partially filled with a liquid, each of said openings being surrounded by a crimped sealing section and including a relatively smooth section between the crimped section and the opening, said openings providing ventilation through the insole and controlling the flow of said liquid.
Dependencies are inferred from the claim text.