Tire pressure maintenance device
US4269252A · kind A · utility
19Cited by
7References
4Claims
0Family size
Inventor
Key dates
| Filing date | Jul 16, 1979 |
| Grant date | May 26, 1981 |
| Priority date | — |
| Expiry date | Jul 16, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60C23/135
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An air pump mechanism which automatically pumps a small quantity of air into an automobile tire upon each rotation of the wheel in order to keep the tire from slowly deflating; the mechanism including an air pump inside the tire which is operated each time that the tire is deformed by rolling on the road surface, and the mechanism also including an adjustable safety valve to prevent over-inflation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.