Connecting devices between the head or foot of a prop and the cap or base of the roof support

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Patents Grantslast 30 patents

Information Patent Grant
Advancing ram pin retention device
- Patent number 9,963,966
- Issue date May 8, 2018
- Joy MM Delaware, Inc.
- Richard Mather
- E21 - EARTH DRILLING MINING
Information Patent Grant
Advancing ram pin retention device
- Patent number 9,605,539
- Issue date Mar 28, 2017
- Joy MM Delaware, Inc.
- Richard Mather
- E21 - EARTH DRILLING MINING
Information Patent Grant
Prop head bearing device for shield supports
- Patent number 9,458,716
- Issue date Oct 4, 2016
- Caterpillar Global Mining Europe GmbH
- Swetlana Horn
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Grant
Prop head bearing
- Patent number 7,201,541
- Issue date Apr 10, 2007
- DBT GmbH
- Rudolf Barmann
- E21 - EARTH DRILLING MINING
Information Patent Grant
Foot element and cooperable strut element for use in a roof support...
- Patent number 4,749,311
- Issue date Jun 7, 1988
- Klockner-Becorit GmbH
- Willy Watermann
- E21 - EARTH DRILLING MINING
Information Patent Grant
3323771
- Patent number 3,323,771
- Issue date Jun 6, 1967
- E21 - EARTH DRILLING MINING
Information Patent Grant
3289997
- Patent number 3,289,997
- Issue date Dec 6, 1966
- E21 - EARTH DRILLING MINING