Tiltable implement for excavator machines and the like

Details Tiltable implement for excavator machines and the like Tiltable implement for excavator machines and the like

1999-11-09

2001-08-07

Batson, Victor (Department: 3671)

Excavating

Miscellaneous

C037S444000, C414S692000, C414S705000, C414S716000, C414S697000

Reexamination Certificate

active

06269561

ABSTRACT:

This invention relates to a tool assembly for an excavator machine and the like, and more particularly to an implement assembly for such machines having improved means for tilting the assembly for performing various work functions.
BACKGROUND OF THE INVENTION
In many excavating operations utilizing a bucket mounted on the end of a machine handle, it often is required or desired to tilt the excavating bucket in order to perform various types of operations. Typically, the tilting of such buckets has been provided by the use of one or more hydraulic cylinder assemblies. Such assemblies have been operated by means of a hydraulic pump normally located on the base of the machine, sets of fluid lines running along the boom and connected handle of the machine to the cylinder assemblies and appropriate controls located at the operator's station of the machine.
Such type of arrangement, however, has a number of disadvantages in terms of manufacturing, operating and maintenance costs. The requirement of a pump, supply and return fluid lines, various fittings and controls obviously adds to initial manufacturing costs. The use of energy for operating the pump adds to the operating costs. Leakage of the various components of such systems further increases maintenance costs. Furthermore, unless the supply and return lines of such systems running along the boom and handle of such machines are adequately sheltered, such lines are vulnerable to damage in the use of the machine which not only results in repair costs but machine down time. It thus has been found to be desirable and the principal object of this invention to provide a tiltable implement assembly for an earth working or material handling machine which abates if not eliminates the aforementioned disadvantages attendant to comparable prior art arrangements.
SUMMARY OF THE INVENTION
The aforementioned disadvantages of prior art arrangements are overcome by the use of a tool assembly mountable on the handle of a machine of the type described generally consisting of a link mountable on the handle of the machine for pivotal movement about a first axis and connectable to a fluid actuated assembly connected to the machine handle, operable for displacing the link about such first axis, an implement connected to the link for pivotal movement about a second axis, a first hydraulic cylinder assembly operatively interconnecting the link and the implement, a second hydraulic cylinder assembly interconnecting the link and the implement, a first fluid line intercommunicating a base end of the cylinder of the first hydraulic cylinder assembly and one of the base and rod ends of the cylinder of the second hydraulic cylinder assembly, a second fluid line intercommunicating a rod end of the cylinder of the first hydraulic cylinder assembly and the other of the base and rod ends of the cylinder of the second hydraulic cylinder assembly, and a valve disposed in one of such fluid lines, operable to be selectively disposed in open and closed conditions. In the use of such an assembly, the angle of the implement relative to the handle of the machine may be adjusted and set merely by operating the control valve to open the valve of the system, permitting free communication of fluid between the base ends of the cylinders interconnecting the link and the implement or the base end of the cylinder of one of such assemblies with the rod end of the cylinder of the other assembly, maneuvering the boom and handle of the machine to cause the implement to engage the ground and become pivotally displaced about the pivot axis of the implement relative to the connecting link, and then operating the controls of the system to close the valve in the fluid line intercommunicating the two cylinder assemblies to lock such assemblies and thus fix the angular position of the implement relative to the connected link.


REFERENCES:
patent: 3631762 (1972-01-01), Fuzzell
patent: 3770322 (1973-11-01), Cobb et al.
patent: 3774954 (1973-11-01), Taguchi et al.
patent: 4639183 (1987-01-01), Guthoff
patent: 5375348 (1994-12-01), Kishi
patent: 5473828 (1995-12-01), Kishi
patent: 6120237 (2000-09-01), Cummings et al.

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