Nozzle retention method for rock bits
US4407378A · kind A · utility
62Cited by
8References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 11, 1981 |
| Grant date | Oct 4, 1983 |
| Priority date | — |
| Expiry date | Mar 11, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S239/19
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method to retain a nozzle in a rock bit is disclosed for use particularly with air-type roller cone rock bits. A plastic nozzle body is formed with a multiplicity of radially disposed fins equidistantly spaced on the periphery of the nozzle body. A nozzle retention hole is formed in the body of the rock bit with a diameter slightly less than the diameter of the fins on the plastic nozzle. As the plastic nozzle body is forced into the nozzle retention hole, the fins deflect slightly in a downstream direction and "bite" against the nozzle retention walls formed by the bit body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.