Threaded wedge retainer for top lift
US4924607A · kind A · utility
9Cited by
13References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 3, 1989 |
| Grant date | May 15, 1990 |
| Priority date | — |
| Expiry date | Apr 3, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA43B21/46
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A releasable retainer for a replaceable top lift (30) of a shoe heel (10) includes a threaded wedge (25) threaded into a retainer hole (18) that intersects a mounting hole (15) for the top lift. There, a dowel rod or tube (20) holding the top lift at its bottom end (23) has a slot (21) at its upper end (22) engaged by a conical wedge tip (26) of threaded wedge (25) threaded into retainer hole (18). The wedging action of conical tip (26) in slot (21) of tube (20) or rod (50) spreads the tube and holds it firmly in mounting hole (15), against both rotary and axial movement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.