Bladder and method of making the same
US6258421A · kind A · utility
64Cited by
35References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 5, 1998 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Nov 5, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24669
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A bladder usable in the sole of a shoe for supporting the plantar area includes a plurality of chambers designed to provide a resilient resistance force. In the fabrication of the bladder, each of the chambers is formed in fluid communication with each other, and fluid is supplied into the chambers at a selected location. After the chambers have been pressurized to the desired internal pressure, the fluid communication port(s) is sealed. Although certain of the chambers are pressurized to the same internal pressure, different resistance forces are provided by forming the chambers with different volumes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.