Thread pitch
US12286842B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 16, 2022 |
| Grant date | Apr 29, 2025 |
| Priority date | — |
| Expiry date | Nov 16, 2042 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/36
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A female portion arranged to form part of a thread joint for a percussive drilling tool includes a mounting sleeve, wherein the mounting sleeve has at least one substantially cylindrical internally threaded section having a length, L1, a thread entrance located towards an axial end and a thread exit located towards the axial inner wall. The threaded section has a thread form including crests, roots, contact flanks, and non-contact flanks, a pitch length, L4, located between two axially neighboring crests and an inner diameter, D2 disposed radially between the roots. A thread clearance section is positioned between the axial inner wall and the thread exit and has a length L2 and a diameter D1. A guiding section is positioned between the thread entrance and the axial end of the sleeve and has a length, L3. The pitch length, L4, is between 12.8-14.5 mm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.