Title: Automotive tractor unit, more particularly for riding and working on vertical walls, ceilings and suchlike

Abstract: The invention pertains to an automotive tractor unit, more particularly for riding and working on vertical walls and ceilings, of the type which consists mainly of a frame; of belt shaped progression elements or tracks which are appropriately driven and are provided with adhesion devices such as suction discs or magnets as well as with elements for attaching appropriate accessories or tools such as a spraying piston or suchlike to the tractor. The belts or tracks are fitted so as to hinge with respect to the frame and around shafts which extend in the longitudinal sense of the tractor.

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Inventors: van der Lende, Leendert J. (Rotterdam, NL)
Zwaanswijk, Michel L. (Rotterdam, NL)

Application Number: 818678
Filing Date: 1977-07-25
Publication_date: 1979-01-02
Assignee:
Primary Class(es): 180/9.5 114/222, 180/901, 305/20, 305/178
Other Classes:
US Patent Ref:

2458755	Jan, 1949	Waller	305/35.
3687226	Aug, 1972	Coyne	180/9.
3777834	Dec, 1973	Hiraoka et al.	114/222.
3960229	Jun, 1976	Shio	114/222.

Other Refs: 463634

Aug, 1928	DE2

Primary Examiner: Reeves, Robert B.
Assistant Examiner: Shannon, John P.
Attorney: Bacon & Thomas