Title: Apparatus with a motor-driven material removing tool, especially for cutting concrete, stone or the like

Abstract: An apparatus with a motor driven material removing tool for cutting, drilling, milling, sawing or grinding of concrete, stone or the like. The apparatus comprises three spaced apart operational groups, namely a working group, a vacuum source and control group, and a driving group. The groups are mobile and interconnectable and disconnectable by hoses and electrical cables. The working group comprises an interchangeable tool, such as a drill, drive motor means for driving and advancing the tool, and a tool holding device mounted on the outside of a rigid suction bell. The vacuum and control group includes vacuum producing means and electrical and fluid control units. The driving group has at least one hydraulic pressure pump with motor means for generating the hydraulic power for driving and advancing the tool.

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Inventors: Bieri, Hans (8330 Pfaeffikon, CH)

Application Number: 602633
Filing Date: 1975-08-07
Publication_date: 1977-03-22
Assignee:
Primary Class(es): 173/32 60/486, 60/489, 60/916, 175/211
Other Classes:
US Patent Ref:

3351143	Nov, 1967	Seibold et al.	75/209.
3550701	Jul, 1969	Holley	173/33.
3682253	Aug, 1972	McIntosh et al.	173/43.
3819153	Jun, 1974	Hurst et al.	60/DIG.

Other Refs:
Primary Examiner: Purser, Ernest R.
Assistant Examiner: Pate, III, William F.
Attorney: Fasse; Wolfgang G., Roberts; Willard W.