Patent · US Active

Shank adaptor with strengthened flushing hole

US10087686B2 · kind B2 · utility

0Cited by

10References

15Claims

0Family size

Assignee

Sandvik Intellectual Property AB · SE

Inventors

Anna NORDSTRAND · Gävle, SE
Petri Ahola · Gävle, SE
Rasmus Hemph · Gävle, SE

Key dates

Filing date	May 2, 2016
Grant date	Oct 2, 2018
Priority date	—
Expiry date	May 2, 2036

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B17/16
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A rock drilling shank adaptor has at least one flush hole extending radially through the body of the adaptor in communication with an axially extending internal bore. The flush hole in a direction from an external side to an internal side includes a surface at a rearward region that is curved at least at a radially inner portion to extend in an axial direction towards a forwardmost end of the adaptor to increase the resistance of the adaptor to stress concentrations whilst achieving a desired flow rate of flushing fluid flow into the internal bore.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.