Patent · US Active

Drilling apparatus

US11674357B2 · kind B2 · utility

0Cited by

5References

19Claims

0Family size

Assignee

Liebherr-Components Biberach GmbH · DE

Inventors

Norbert Hausladen · Biberach, DE
Viktor Schindler · Munderkingen, DE

Key dates

Filing date	Jun 27, 2019
Grant date	Jun 13, 2023
Priority date	—
Expiry date	Nov 9, 2039

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B7/027
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A drilling apparatus in the form of a Kelly drilling rig including a drilling tool holder for holding a drill rod, in particular a Kelly bar, which can be rotatably driven by a rotary drive via a gearbox, wherein the gearbox includes a gearbox housing with multiple gearbox elements rotatably mounted therein. At least one plastically deformable shock absorber element for absorbing shocks is provided on at least one of the gearbox elements in the gearbox housing.

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