US 10,208,593 B2 · Chisel holder for a soil treatment machine

Abstract

The invention relates to a bit holder for an earth working machine, in particular a road milling machine, that comprises a bit receptacle in the region of a working side of a support member and that indirectly or directly carries an insertion projection on an insertion projection side of the support member, the support member comprising two stripping surfaces [first or second stripping surfaces] that form a stripping surface pair and are at an angle to one another. In order to achieve a stable and long-lived configuration with such a bit holder, provision is made according to the present invention that the support member comprises at least one further stripping surface that is at an angle to the two stripping surfaces of the stripping surface pair.

Claims15

Dependent claims

A tool apparatus for an earth working machine, comprising:

an insertion projection;
and
a support member having an insertion projection side and a working side, the insertion projection extending from the insertion projection side, the working side facing away from the insertion projection, the support member including a convex pyramid shaped bearing surface system defined on the insertion projection side, the convex pyramid shaped bearing surface system including at least three non-parallel planar bearing surfaces, each of the bearing surfaces forming a part of a side of one and the same pyramid shape having at least three sides, each of the bearing surfaces intersecting at least one other of the bearing surfaces.

A tool apparatus for an earth working machine, comprising:

an insertion projection having a longitudinal insertion axis;
and
a support member having an insertion projection side and a working side, the insertion projection extending from the insertion projection side, the support member having defined on the insertion projection side a bearing surface system including four non-parallel planar bearing surfaces configured so as to support the support member against tension loading in the insertion projection parallel to the longitudinal insertion axis, and to support the support member against forward and rearward forces and side to side forces orthogonal to the longitudinal insertion axis, the forward and rearward forces being defined with reference to a tool advance direction, each of the four non-parallel planar bearing surfaces forming a part of a side of one and the same pyramid shape having four sides, each of the bearing surfaces intersecting at least one other of the bearing surfaces.

Dependencies are inferred from the claim text.

Facts

Application

15/664,137Filed 31 Jul 2017 · continuation

Priority

DE 10 2011 051 5254 Jul 2011

Published

US 2018/0016898 A118 Jan 2018

Granted

19 Feb 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification10 codes

E21C 35/193
Means for fixing picks or holders: using bolts as main fixing elements
B28D 1/188
Tools therefor, e.g. having exchangeable cutter bits: with exchangeable cutter bits or cutter segments
E01C 23/088
Using power-driven tools, e.g. vibratory tools: rotary tools, e.g. milling drums
E21C 35/18
Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 -…:…

Family

PCT/EP2012/062556Parent of this continuation · filed 28 Jun 2012

Application15/007,644Parent of this continuation · filed 27 Jan 2016

US 2018/0016898 A1Pre-grant publication · published 18 Jan 2018

US 9,739,145 B2Parent of this continuation

Application13/822,917Parent of this continuation

US 9,260,965 B2Parent of this continuation

US 2014/0117741 A1Published application

US 2016/0208606 A1Published application

US 10,208,593 B2This patent

From the US filing history. Foreign family members aren’t listed.

Chisel holder for a soil treatment machine

Life of this patent

Chisel holder for a soil treatment machine

Life of this patent

Abstract

Claims15