| US 7,568,530 B2 | ||
| Ground working implement | ||
| Jakob Haertl, Poettmes (Germany) | ||
| Assigned to Bauer Maschinen GmbH, Schrobenhausen (Germany) | ||
| Filed on Dec. 08, 2006, as Appl. No. 11/635,796. | ||
| Claims priority of application No. 05027009 (EP), filed on Dec. 09, 2005. | ||
| Prior Publication US 2008/0011495 A1, Jan. 17, 2008 | ||
| Int. Cl. A01B 5/08 (2006.01) | ||
| U.S. Cl. 173—184 [173/90] | 9 Claims |
| 1. A ground working implement for underground work, the ground working implement having a mast and comprising:
a base positioned on the mast;
a slide displaceably mounted on the mast, the slide being displaceable relative to the base; and
a lifting cylinder arrangement being connected to the slide and the base for displacing the slide relative to the base, the
lifting cylinder arrangement having
a first lifting cylinder means having at least two lifting cylinders each with a cylinder casing and a lifting piston displaceable
within the cylinder casing, and
a second lifting cylinder means having a third lifting cylinder with a third cylinder casing and a third lifting piston displaceable
within the third lifting cylinder casing, the pistons of the first lifting cylinder means displaceable in a direction which
is the opposite of the direction of displacement of the third piston, the cylinder casings being juxtaposed and interconnected,
and wherein the one lifting cylinder casing of the second lifting cylinder means is placed centrally with respect to the at
least two lifting cylinder casings of the first lifting cylinder means,
an adaptor member movably mounted on the mast, on which are placed the at least two lifting pistons of the first lifting cylinder
means and
a central connection element, for connecting the adaptor member to the base.
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