Insole with arch spring
US6915598B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2002 |
| Grant date | Jul 12, 2005 |
| Priority date | — |
| Expiry date | Oct 27, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA43B17/14
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An insole for use with footwear includes a first layer including a heel portion of a first thickness, a mid portion connected to a front section of the heel portion and having a substantially constant thickness which is much less than the first thickness, and having an upward curvature, an upper surface extending along the mid and heel portions and on which a person stands, and a lower surface extending along the mid and heel portions, the lower surface including a shallow recess in the mid portion, the first layer being made of a material of a first hardness; and a flexible and resilient, thin arch spring insert of a substantially constant thickness secured in the recess and following the curvature of the mid portion, the arch spring insert being made of a material of a second hardness which is greater than the first hardness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.