Patent · US Active

Shank-type pick

US9144922B2 · kind B2 · utility

6Cited by

11References

20Claims

0Family size

Assignee

Wirtgen GmbH

Inventors

Markus Roth · Schenkenzell, DE
Thomas Allgaier · Schramberg, DE
Thomas Lehnert · Oberraden, DE

Key dates

Filing date	Oct 11, 2012
Grant date	Sep 29, 2015
Priority date	—
Expiry date	Oct 11, 2032

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21C35/197
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

The invention relates to a shank bit for a road milling machine or the like, having a bit head and a bit shank, the bit shank comprising a first cylindrical segment that is indirectly or directly adjacent to the bit head, and the bit shank comprising a second cylindrical segment that, facing away from the bit head, is indirectly or directly adjacent to the first cylindrical segment, and the diameter of the second cylindrical segment differing from the diameter of the first cylindrical segment. In a shank bit of this kind, improved utilization properties result from the fact that the first cylindrical segment has a diameter in the range between 18 mm and 30 mm, and an extent in the direction of the longitudinal center axis of the bit shank less than 30 mm.

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