Scoop-and-dump jack for shovel-loader
AssigneeKarl Schaeff GmbH & Co., Maschinenfabrik
InventorHans Schaeff
Life of this patent
Estimating the term…
Abstract
The invention concerns a scoop-and-dump jack of a loader shovel or a fork of a shovel loader and comprising a piston-rod extension 46a guided in a sealed borehole of the jack cylinder-bottom 43 to achieve a dumping motion at least as rapid as the retracting motion and to permit simple assembly and maintenance of the jack, the diameter of said extension corresponding at least to that of the piston rod 46, the jack bearing-eye 50 and the jack cylinder-bottom being integrally joined by a connection member 49 extending over most of the length of advance of the piston-rod extension 46a, and the receiving space 51 for the piston-rod extension comprising a laterally open access for purposes of assembly or exchange of the guide means and seals 44, 45 in the jack cylinder-bottom.
Claims19
A shovel loader device including a scoop-and-dump jack in combination with a loader shovel for a construction vehicle, the jack having a case and a cyliner-bottom, the cylinder-bottom hinges by a bearing eye on a loader chassis above a pivotable operational truss, and a piston rod which hinges by means of a bearing eye on a rocker lever attached to the operational truss, in such a manner that the loader shovel indirectly linked to the scoop-and-dump jack remains in an upwardly open pivoted position over the entire pivoting range of the operational truss while the length of the jack remains constant, the combination of said loader shovel and said scoop-and-dump jack wherein:
- a) the jack comprises a piston-rod extension guided inside a sealed borehole of the jack cylinder-bottom, the diameter of said extension corresponding at least to that of the piston rod and of which the length corresponds at least to that of the maximum piston stroke;
- b) the jack bearing-eye and the jack cylinder-bottom are integrally connected by a connection member extending across most of the length of the movement of the piston-rod extension and tensionally and compressively resistant to the jack forces;
- and
- c) a central receiving space for the piston-rod extension being present in the connection member, which comprises a laterally open access for assembly and exchange of piston-rod seals in the jack cylinder-bottom.
A shovel loader device, comprising:
- a) a loader shovel;
- b) a scoop-and-dump jack attached to said loader shovel;
- c) said scoop-and-dump jack including:
- i) a cylinder having a cylinder bottom;
- ii) a piston rod disposed in said cylinder;
- iii) a piston rod extension attached to said piston rod and extending through said cylinder bottom;
- iv) a jack bearing-eye spaced from said cylinder bottom;
- v) a connection member disposed between said cylinder bottom and said jack bearing eye;
- vi) said connection member having a central receiving space for receiving said piston rod extension;
- vii) said central receiving space being sufficiently long for receiving substantially the entire piston rod extension;
- and
- viii) said central receiving space comprising an opening located adjacent to said cylinder bottom and sized to permit lateral access to said cylinder bottom.
A scoop-and-dump jack for use with a shovel loader device, said scoop-and-dump jack comprising:
- a) a cyliner having a cylinder bottom;
- b) a piston rod disposed in said cylinder;
- c) a piston rod extension attached to said piston rod and extending through said cylinder bottom;
- d) a jack bearing-eye spaced from said cylinder bottom;
- e) a connection member disposed between said cylinder bottom and said jack bearing-eye;
- f) said connection member having a central receiving space for receiving said piston rod extension;
- g) said central receiving space being sufficiently long for receiving substantially the entire piston rod extension;
- and
- h) said central receiving space comprising an opening located adjacent to said cylinder bottom and sized to permit lateral access to said cylinder bottom.
Dependencies are inferred from the claim text.