US4132279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automotive tractor unit, more particularly for riding and working on vertical walls, ceilings and suchlike
Assignee: SCARAB AB
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Filing: 1977-07-25
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Granted: 1979-01-02
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Expires: 1997-07-25
Abstract
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.
Inventors
- 👤 Leendert J. van der Lende
- 👤 Michel L. Zwaanswijk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:03
CPC Classifications
B; B63; B63B; B63B59/00; B63B59/06; B63B59/10; B62; B62D; B62D55/00; B62D55/08; B62D55/18; B62D55/26; B62D55/265; Y; Y10; Y10S; Y10S180/00; Y10S180/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
An automotive tractor unit for traversing vertical walls and ceilings, including a frame and two separate driving assemblies mounted on distinct sides of said frame, each of said driving assemblies including a support pivotally mounted on an axle parallel to the longitudinal axis of said frame, a set of wheels including at least two wheels mounted on each said support and having axles substantially perpendicular to said longitudinal axis, said driving assemblies each including a motor driving one of said two wheels, a flexible endless belt arranged on said two wheels, said belt carrying a plurality of rows of surface gripping devices, a series of rollers mounted on each said support above an upper stretch of said belt, so as to exert a pressure on said upper stretch and so as to push said upper stretch in the direction of the lower stretch of said belt.
Claim 2
Dependent Claim
146 words
An automotive tractor unit for traversing vertical walls and ceilings, including a frame and two separate driving assemblies mounted on distinct sides of said frame, each of said driving assemblies including a support pivotally mounted on an axle parallel to the longitudinal axis of said frame, a set of wheels including at least two wheels mounted on each said support and having axles substantially perpendicular to said longitudinal axis, said driving assemblies each including a motor driving one of said two wheels, a flexible endless belt arranged on said two wheels, said belt carrying a plurality of rows of surface gripping devices, a series of rollers mounted on each said support above an upper stretch of said belt, so as to exert a pressure on said upper stretch and so as to push said upper stretch in the direction of the lower stretch of said belt.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-01 | 1982-07-03 | 1983-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-01 | 1986-07-03 | 1987-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-01 | 1990-07-03 | 1991-01-02 | $7700.00 | Window Closed / Lapsed |