WOMEN'S SHOES WITH FLEXIBLE SPRING STEEL SHANKS FOR USE WITH REPLACEABLE HEELS OF DIFFERENT HEIGHT

MARY J. DILL
Patent No. 4,670,996

Patented June 09, 1987

CLAIMS:

1. A women's shoe for use with replaceable heels of different height comprising:

an elongated sole having a forward support portion and a raised heel portion;
an insole superimposed over and secured to the sole;
there being an elongated undercut central slot in said insole adjacent said sole;
an elongated flexible spring steel shank nested within said slot, at one end anchored to said sole and insole;
a high heel registrable with said heel portion;
interlocking fastener means upon said heel and heel portion removably anchoring said heel to said heel portion;
said high heel upon disengagement of said fastener means adapted for removal and replacement by a low heel having similar fastener means;
the replacement of the low heel shortening the distance between the anchoring of said shank and the end of said slot, with said shank moving longitudinally of said sole and insole within said slot.

2. In the women's shoe of claim 1, said shank being shorter than said slot.

3. In the women's shoe of claim 1, said shank having a heel end which is secured to said sole and insole.

4. In the women's shoe of claim 1, each heel having an end face, said interlocking fastener means including a plurality of interconnected spaced lock segments and spaced undercut lock flanges upon said heel portion and end face respectively, adapted upon relative rotation from locked position through an acute angle for disengagement;

and a retractible alignment pin in said heel spaced from said lock segments nested within an alignment opening in said sole preventing said relative rotation.

5. In the women's shoe of claim 4, said lock segments being mounted upon and secured to said heel portion and spaced therefrom with said lock flanges upon said heel;

in one angular position of said heel relative to said heel portion said segments being adapted for projection into corresponding slots in said heel, and upon relative angular rotation adapted to interlock with said flanges.

6. In the women's shoe of claim 4, said lock segments, flanges and slots being arcuate.

7. In the women's shoe of claim 5, the mounting of said lock segments including a heel anchor plate secured to said heel portion;

said lock segments depending from said anchor plate and projecting outwardly.

8. In the women's shoe of claim 4, a retractible anchor pin slidably mounted within said heel in a lock position retainingly engaging said alignment pin in heel locking position.

9. In the women's shoe of claim 8, spring means normally biasing said alignment pin toward a release position;

there being a clearance recess in said anchor pin, on manual retraction of said anchor pin said alignment pin moving into said recess.

10. In the women's shoe of claim 9, spring means normally biasing said anchor pin to locked position.

11. In the women's shoe of claim 10, and a stop pin on said anchor pin movable within a slot limiting outward positioning of said anchor pin.

12. In the women's shoe of claim 11, said anchor pin having a cam surface adjacent its recess, outward projection of said anchor pin adapted for camming said alignment pin into said alignment opening.

13. In the women's shoe for use with replaceable heels of different height comprising:

an elongated sole having a forward support portion and a raised heel portion;
an insole superimposed over and secured to the sole;
there being an elongated undercut central slot in said insole adjacent said sole;
an elongated flexible shank nested within said slot, at one end anchored to said sole and insole;
a high heel registrable with said heel portion;
interlocking fastener means upon said high heel and heel portion removably anchoring said high heel to said heel portion;
said high heel upon disengagement of said fastener means adapted for removal and replacement by a low heel having similar fastener means;
each high heel and low heel having an end face;
said interlocking fastener means including a plurality of interconnected spaced lock segments and spaced undercut lock flanges upon said heel portion and end face respectively, adapted upon relative rotation from locked position through an acute angle for disengagement; and
a retractable alignment pin in each of said high heel and low heel which, when in use, is spaced from said lock segments nested within an alignment opening in said sole preventing said relative rotation;
said lock segments being mounted upon and secured to said heel portion and spaced therefrom with said lock flanges upon the opposing heel;
in one angular position of said opposing heel relative to said heel portion said segments being adapted for projection into corresponding slots in said opposing heel, and upon relative angular rotation adapted to interlock with said flanges.
the mounting of said lock segments including a heel anchor plate secured to said heel portion;
said lock segments depending from said anchor plate and projecting outwardly;
a retractable anchor pin slidably mounted within said heel in a lock position retainingly engaging said alignment pin in heel locking position; and
the replacement of the low heel shortening the distance between the anchoring of said shank and the end of said slot, with said shank moving longitudinally in said sole and insole within said slot.

14. In a women's shoe for use with replaceable heels of different height comprising:

an elongated sole having a forward support portion and a raised heel portion;
an insole superimposed over and secured to the sole;
a high heel registrable with said heel portion;
interlocking fastener means upon said high heel and heel portion removably anchoring said high heel to said heel portion;
said high heel upon disengagement of said fastener means adapted for removal and replacement by a low heel having similar fastener means;
each heel having an end face;
said interlocking fastener means including a plurality of interconnected spaced lock segments and spaced undercut lock flanges upon said heel portion and end face of the opposing heel respectively, adapted upon relative rotation from locked position through an acute angle for disengagement;
a retractable alignment pin in each heel, said alignment of the opposing heel being spaced from said lock segments nested within an alignment opening in said sole preventing said relative rotation;
said lock segments being mounted upon and secured to said heel portion and spaced therefrom with said lock flanges upon the opposing heel;
in one angular position of said opposing heel relative to said heel portion said segments being adapted for projection into corresponding slots in said opposing heel, and upon relative angular rotation adapted to interlock with said flanges;
the mounting of said lock segments including a heel anchor plate secured to said heel portion;
said lock segments depending from said anchor plate and projecting outwardly; and
a retractable anchor pin slidably mounted within said opposing heel in a lock position retainingly engaging said alignment pin in heel locking position;
and first spring means in each of said high heel and low heel, the first spring means of the opposing heel normally biasing said alignment pin toward a release position;
there being a clearance recess in said anchor pin, on manual retraction of said anchor pin said alignment pin moving into said recess.

15. In the women's shoe of claim 14 and second spring means in each of said high heel and low heel, the second spring means of the opposing heel normally biasing said anchor pin to an unlocked position.

16. A women's shoe for use with replaceable heels of different height comprising:

an elongated sole having a forward support portion and a raised heel portion;
an insole superimposed over and secured to the sole;
there being an elongated undercut central slot in said insole adjacent said sole;
an elongated flexible shank nested within said slot, at one end anchored to said sole and insole;
a high heel registrable with said heel portion;
interlocking fastener means upon said heel and heel portion removably anchoring said heel to said heel portion;
said high heel upon disengagement of said fastener means adapted for removal and replacement by a low heel having similar fastener means;
the replacement of the low heel shortening the distance between the anchoring of said shank and the end of said slot, with said shank moving longitudinally of said sole and insole within said slot.