Extendable spikes for shoes
US8578631B2 · kind B2 · utility
3Cited by
23References
4Claims
0Family size
Inventors
Key dates
| Filing date | Jun 16, 2010 |
| Grant date | Nov 12, 2013 |
| Priority date | — |
| Expiry date | Jul 2, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA43B13/203
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Golf shoe sole 10 having extendable spikes 71 activated by compressed air from a pump 42 located inside sole of shoe. Pump 42 is operated by weight of wearer's heel on a bladder 41 located in heel of sole and check valves 51 maintain pressure in pneumatic system. Pushbutton switch 58 selects movement of spikes 71 between retracted and extended modes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.