Plugs composed of two rubbers having different moduli of extension used for repairing pneumatic tires
US4243089A · kind A · utility
2Cited by
8References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 9, 1979 |
| Grant date | Jan 6, 1981 |
| Priority date | — |
| Expiry date | Jul 9, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T152/10909
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A repair plug comprises an elongate body having a head and a tail made of rubber compositions having different moduli of extension. The head has a higher modulus of extension than the tail and is adapted for engagement by a repair tool. The head may have a hole adjacent the free end thereof in which a member of a repair tool is received to allow insertion of the plug in a puncture hole without folding back on itself. Preferably the head is tapered in the direction leading towards the free end thereof and is made of a rubber composition the hardness of which exceeds that of the tail thereby further facilitating insertion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.