Athletic shoe with compression indicators and replaceable spring cassette
DCFirst Claim
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1. An athletic shoe characterized by:
- a bottom cushioned sole;
shoe upper connected to said bottom cushioned sole and forming with said sole an interior sized for receiving a human foot;
an insole removably mountable in the interior of said shoe and normally mounted over an upper surface of said bottom sole;
said bottom sole having a cavity that is accessible through its upper surface such that it is accessible from the interior of said shoe;
a flexible resilient cassette mounted in said cavity;
said cassette having an outer wall contoured to form a first portion of a fastener assembly;
said cavity having a side wall contoured to provide a second portion of said fastener assembly;
said cassette made from a resiliently flexible material;
said cassette normally being positively secured in place within said cavity during normal wear and flexing of said shoe sole during use on a foot via said fastener assembly with first and second portions forming a positive interlock;
said cassette being removable from said cavity by removal of said inner sole and flexing of said bottom sole such that its rear and forward ends move downwardly with respect to its center section to disengage said first portion from said second portion of said fastener assembly and allow removal of said cassette from said cavity and from said interior of said shoe.
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Abstract
An athletic shoe (10) has a bottom sole (12) and a removable insole (16). The bottom sole (12) has two cavities (24) and (26) that are accessible from the interior (22) of the shoe. Respectively sized removably mounted cushioning cassettes (30) and (32) are removably mounted in the cavities (24) and (26). Each cassette is resiliently flexible and has spring elements (44) seated therein. Viscous fluid indicators (60) and (80) are also mounted on the shoe to determine the impact stresses and compression fit of the shoe on the foot.
101 Citations
10 Claims
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1. An athletic shoe characterized by:
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a bottom cushioned sole; shoe upper connected to said bottom cushioned sole and forming with said sole an interior sized for receiving a human foot; an insole removably mountable in the interior of said shoe and normally mounted over an upper surface of said bottom sole; said bottom sole having a cavity that is accessible through its upper surface such that it is accessible from the interior of said shoe; a flexible resilient cassette mounted in said cavity; said cassette having an outer wall contoured to form a first portion of a fastener assembly; said cavity having a side wall contoured to provide a second portion of said fastener assembly; said cassette made from a resiliently flexible material; said cassette normally being positively secured in place within said cavity during normal wear and flexing of said shoe sole during use on a foot via said fastener assembly with first and second portions forming a positive interlock; said cassette being removable from said cavity by removal of said inner sole and flexing of said bottom sole such that its rear and forward ends move downwardly with respect to its center section to disengage said first portion from said second portion of said fastener assembly and allow removal of said cassette from said cavity and from said interior of said shoe. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A cassette insert for an athletic shoe, said cassette characterized by:
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a bottom section and a top section with at least one spring element interposed therebetween; said bottom section and top section secured together to lock said at least one spring element in position therebetween; one of said top and bottom sections of said cassette having an enclosing upright vertical wall that defines in part a spring seat; the other of said top and bottom sections of said cassette having a tapered wall with a distal end that telescopically fits within the part of the spring seat of said one section with said tapered wall having its distal end spaced closer together than said vertical wall and said tapered wall diverging toward a base at said other of said top and bottom sections and said tapered wall abut a distal end of said upright vertical wall at a predetermined amount of motion of the top section toward the bottom section to form a compressive stop to resist further motion of the top section toward said bottom section. - View Dependent Claims (8, 9, 10)
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Specification