US4317294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Replaceable shoe sole
Assignee: Individual
•
Filing: 1980-05-20
•
Granted: 1982-03-02
•
Expires: 2000-05-20
Abstract
Abstract A replaceable shoe sole is comprised of a mid-sole, which is securely attached to the upper portion of the shoe, and an out-sole removeably attached to the mid-sole. The upper surface of the out-sole is provided with a continuous ridge which is snapped into a matching, deformably resilient groove recessed into the bottom surface of the mid-sole. The configuration of the ridge and the resiliency of the out-sole and the mid-sole material, which is preferably a polyurethane resin or foam, permits the out-sole to be easily and selectively removed and replaced by an out-sole having a new or distinctive tread pattern, the replaced out-sole being reusable if desired. The ridge on the out-sole is provided with an undercut portion to provide secure retention of the out-sole in the mid-sole, although the specific cross sectional shape of the ridge may vary depending upon the retentiveness required by a particular activity.
Inventors
- 👤 Mark V. Goodyear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:10
CPC Classifications
A; A43; A43B; A43B13/00; A43B13/28; A43B13/36
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
163 words
An athletic shoe adapted to receive interchangeable, treaded bottom surfaces which are suitable for use in a variety of athletic activities, comprising: an upper shoe portion to receive the foot of the user of said athletic shoe; a mid-sole securely attached to the bottom surface of said upper shoe portion, said mid-sole having a substantially continuous groove recessed into the bottom surface of said mid-sole with an opening thereon; and an out-sole removably attached to and superimposed on said mid-sole to form a unitary sole on said athletic shoe, said out-sole comprising: a treaded bottom surface to provide traction to said shoe; and a substantially continuous ridge formed on a top surface of said out-sole, said ridge being aligned with and inserted into said groove in said mid-sole to provide snap-fit engagement means between said mid-sole and said out-sole for removably attaching said out-sole to said mid-sole and for selectively permitting removal and replacement of either said out-sole or other similarly constructed out-soles.
Claim 2
Dependent Claim
163 words
An athletic shoe adapted to receive interchangeable, treaded bottom surfaces which are suitable for use in a variety of athletic activities, comprising: an upper shoe portion to receive the foot of the user of said athletic shoe; a mid-sole securely attached to the bottom surface of said upper shoe portion, said mid-sole having a substantially continuous groove recessed into the bottom surface of said mid-sole with an opening thereon; and an out-sole removably attached to and superimposed on said mid-sole to form a unitary sole on said athletic shoe, said out-sole comprising: a treaded bottom surface to provide traction to said shoe; and a substantially continuous ridge formed on a top surface of said out-sole, said ridge being aligned with and inserted into said groove in said mid-sole to provide snap-fit engagement means between said mid-sole and said out-sole for removably attaching said out-sole to said mid-sole and for selectively permitting removal and replacement of either said out-sole or other similarly constructed out-soles.
Claim 3
Dependent Claim
45 words
The athletic shoe of claim 1 wherein the width of said ridge at its widest point is greater than the width of the opening of said groove to provide means for anchoring said out-sole to said mid-sole when said ridge is located within said slot.
Claim 4
Dependent Claim
30 words
The athletic shoe of claim 2 wherein said opening of said groove is resiliently deformable for selectively permitting insertion and removal of said ridge and the reusability of said out-sole.
Claim 5
Dependent Claim
35 words
The athletic shoe of claim 1 wherein a portion of said ridge is undercut and a corresponding portion of said groove protrudes, said undercut and protruding portions engaging to retain said ridge with said groove.
Claim 6
Dependent Claim
28 words
The athletic shoe of claim 4 wherein said ridge is essentially diamond-shaped in cross section, said undercut portion being formed by a wide mid-section and a narrower base.
Claim 7
Dependent Claim
21 words
The athletic shoe of claim 5 wherein the width of said base is one-third to one-half the width of said mid-section.
Claim 8
Dependent Claim
16 words
The athletic shoe of claim 4 wherein the cross sectional shape of said ridge is rounded.
Claim 9
Dependent Claim
24 words
The athletic shoe of claim 1 wherein the upper surface of said mid-sole is releived to decrease in the weight of said athletic shoe.
Claim 10
Dependent Claim
16 words
The athletic shoe of claim 1 wherein said out-sole is constructed from a flexible polyurethane resin.
Claim 11
Dependent Claim
16 words
The athletic shoe of claim 9 wherein said mid-sole is also constructed from a polyurethane resin.
References Cited (Backward Citations)
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Cited
US2368314A
Cited
US2760279A
Cited
US3019534A
Cited
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Cited
US4267650A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-03-01 | 1985-08-31 | 1986-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-01 | 1989-08-31 | 1990-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-01 | 1993-08-31 | 1994-03-02 | $7700.00 | Window Closed / Lapsed |