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US4272897A Expired / Lapsed US ⏱️ 0.0 years remaining

Steel shank support for molded unit sole

Assignee: Individual
•
Filing: 1979-11-13
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Granted: 1981-06-16
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Expires: 1999-11-13
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Abstract

Abstract A shoe shank support suitable for being molded into a unit sole for a ladies high heel shoe provides increased stability and resistance to flexing and comprises a shank of metal strapping sufficiently long to extend from the heel area to approximately the beginning of the ball of the foot and a heel post which extends the height of the heel. The shank may be generally flattened and include a strengthening rib or it may be oval in shape. The heel post is attached to the heel area of the shank by being inserted through a hole and tightened in position by a reversed wing nut. The threaded end of the heel post extends the length of the heel and protrudes a small distance therefrom to provide a mounting for top lifts on the bottom of the heel. Additional holes may be provided in the shank for positioning the shank in a mold and preventing slippage of the shank during the molding process. In a second embodiment, the heel post may be molded into a separate heel unit and secured to a separately molded sole by threading into the wing nut fastener molded into the sole.

Inventors

  • 👤 Gerald J. Ponce

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 04:49
CPC Classifications
A; A43; A43B; A43B23/00; A43B23/22; A43B13/00; A43B13/37; A43B23/222

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 100 words
In a molded unit sole for a lady's high heel shoe, a shoe shank support suitable for being molded into said unit sole and which provides stability from side to side and heel to toe comprising a shank of sufficient length to extend from the heel area to approximately the beginning of the ball of the foot, said shank having means defining a hole therein, a detachable heel post for strengthening the heel, said heel post being threaded, and means to fix said heel post within said shank hole including a wing nut for reverse threading onto said heel post.
Claim 2
Dependent Claim 100 words
In a molded unit sole for a lady's high heel shoe, a shoe shank support suitable for being molded into said unit sole and which provides stability from side to side and heel to toe comprising a shank of sufficient length to extend from the heel area to approximately the beginning of the ball of the foot, said shank having means defining a hole therein, a detachable heel post for strengthening the heel, said heel post being threaded, and means to fix said heel post within said shank hole including a wing nut for reverse threading onto said heel post.
Claim 3
Dependent Claim 21 words
The device of claim 1 wherein the shank has a rib formed therein extending along its length to thereby strengthen same.
Claim 4
Dependent Claim 12 words
The device of claim 1 wherein the shank is oval in shape.
Claim 5
Dependent Claim 19 words
The device of claim 1 wherein the heel post includes a head of larger diameter than the shank hole.
Claim 6
Dependent Claim 20 words
The device of claim 1 further comprising means to mount a top lift to the heel of said unit sole.
Claim 7
Dependent Claim 28 words
The device of claim 5 wherein a portion of the heel post extends through the bottom of the heel so that a top lift may be mounted thereto.
Claim 8
Dependent Claim 23 words
The device of claim 1 further comprising means defining a hole in the shank for locating the shank support during the molding process.
Claim 9
Dependent Claim 46 words
The device of claim 1 wherein the wing nut is secured to the shank, and the unit sole is molded without a heel, said wing nut and shank thereby providing a means to mount a separately molded heel to the unit sole with the heel post.
Claim 10
Dependent Claim 24 words
The device of claim 1 wherein the shank is sufficiently flexible to be bent into shape to match the curvature of different unit soles.

References Cited (Backward Citations)

US1934092A Cited
FR1211345A Cited
US3091872A Cited
FR2400857A1 Cited
US4198770A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1984-06-15 1984-12-15 1985-06-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1988-06-15 1988-12-15 1989-06-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1992-06-15 1992-12-15 1993-06-16 $7700.00 Window Closed / Lapsed

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