Threaded nozzle for a drill bit
US4658918A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 25, 1985 |
| Grant date | Apr 21, 1987 |
| Priority date | — |
| Expiry date | Jul 25, 2005 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/62
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A threaded nozzle is adapted to be screwed into and screwed out of a threaded opening in a drill bit. The nozzle includes a front face having first and second contact surfaces which are adapted to be engaged by a manually actuable tool for screwing-in and screwing-out the nozzle. The first contact surface is inclined toward the direction of rotation in which the member is screwed-in, so that in response to the application of a force to the first contact surface for screwing-in the nozzle, a reaction force is applied against the tool for pushing the tool off the first contact surface when the nozzle has been screwed-in a predetermined extent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.