Non-slip insole base
US4897937A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1987 |
| Grant date | Feb 6, 1990 |
| Priority date | — |
| Expiry date | Sep 23, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA43B17/00
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An insole base member in planar form for providing a mechanical interlock with a shoe insole is disclosed. The insole base provides a low volume, low profile molded pattern which contacts the underside of the insole material and prevents shearing shifts of the insole. In one embodiment, the insole base has a smooth upper surface in the region adjacent the metatarsal heads of the foot, with a plurality of raised ridges extending transversely across the smooth upper surface, and with the upper surface of the insole base having a cross hatch pattern extending over the remainder of the base anterior and posterior to the smooth upper surface portion. The raised ridges may be positioned so as to lie parallel to the transverse and oblique metatarsal axes of the foot. In alternative embodiments, a plurality of raised ridges are positioned adjacent to the heel or the ball of the foot, with such raised ridges being located outwardly of a central reference point in a pattern corresponding to the spokes of a wheel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.