Steam cleaning device

• US 6,311,365 B1
• Filed: 04/01/1999
• Issued: 11/06/2001
• Est. Priority Date: 12/06/1995
• Status: Expired due to Fees

• Current Assignee: Dornier Technologie GmbH & Co. KG, PharmaSonics, Inc.
• Original Assignee: Dornier Technologies GmbH & Company
• Inventors: Dornier, Irén
• Primary Examiner(s): MOORE, CHRISTOPHER K
• Application Number:
  US09/091,148
• Time in Patent Office: 950 Days
• Field of Search: 153/20, 153/45, 153/02, 153/21
• US Class Current: 15/302
• CPC Class Codes: A47L 1/02 Power-driven machines or devices
• CPC Class Codes: A47L 1/08 with provision for supplying liquids, e.g. cleaning agents A47L1/095, A47L1/13, A47L1/15 take precedence
• CPC Class Codes: A47L 11/34 Machines for treating carpets in position by liquid, foam, or vapour, e.g. by steam
• CPC Class Codes: A47L 11/38 Machines, specially adapted for cleaning walls, ceilings, roofs, or the like
• CPC Class Codes: A47L 11/4038 Disk shaped surface treating tools
• CPC Class Codes: A47L 11/4088 Supply pumps; Spraying devices; Supply conduits

Abstract

The steam cleaning device contains a steam cleaning head with several steam pressure chambers connected to a steam generator, as well as suction regions connected to a vacuum source. The suction regions are constantly supplied with fresh air from a fresh air chamber connected to the outer surroundings of the cleaning head, in order to improve transport of the steam/water/dirt/air mixture to a backward vacuum lock in the steam cleaning head. Suction slits around the periphery of the steam cleaning head ensure completely stripe-free cleaning of, for example, window surfaces. The steam cleaning head can be part of an automatic cleaning machine used for cleaning windows and skyscraper facades.

Claims

1. A steam cleaning apparatus for cleaning a flat surface, said apparatus comprising:

a) a steam cleaning head, a front side on said steam cleaning head for engaging said surface, a plurality of steam pressure chambers in said head, a steam generator means for supplying steam to said plurality of steam pressure chambers, a web surrounding each of said plurality of steam pressure chambers, said webs terminating in a joint plane at said front side;

b) a plurality of separate suction stations, a vacuum source connected to said plurality of suction stations,

c) said steam pressure chambers in operation causing said head to be displaced from the flat surface by a gap, with steam from said steam pressure chambers being vacuumed by the suction stations across said webs.

2. The steam cleaning apparatus according to claim 1, wherein each of said steam pressure chambers having a rear wall, a steam nozzle extending through said rear wall, each of said webs extends from said rear wall.

3. The steam cleaning apparatus according to claim 2, further comprising a steam distribution chamber, said distribution chamber located axially behind said steam pressure chambers, said distribution chamber communicating through said nozzles with said steam pressure chambers.

4. The steam cleaning apparatus according to claim 3, further comprising a pressure tube, said pressure tube connecting said steam generator to said steam distribution chamber.

5. The steam cleaning apparatus according to claim 1, wherein said steam cleaning head has a rear portion, and further comprising a plurality of suction sleeves;

a joint suction chamber in said rear portion;

said suction sleeves connecting said suction regions at said front side with said joint suction chamber; and

a suction tube connecting said joint suction chamber with said vacuum source.

6. The steam cleaning apparatus according to claim 5, further comprising a pressure tube through which steam travels, said pressure tube inside said suction tube, said pressure tube extending through said joint suction chamber.

7. The steam cleaning apparatus according to claim 1, wherein said steam cleaning head has a front section and a subsequent rear section, and wherein when viewed in longitudinal section said steam cleaning head front section is substantially cylindrical and said rear section is substantially conical shaped.

8. The steam cleaning apparatus according to claim 1, wherein said steam cleaning head has a housing, and wherein when viewed in longitudinal section said steam cleaning head housing is substantially cylindrical shaped.

9. The steam cleaning apparatus according to claim 1, wherein said steam cleaning head is substantially delta-shaped when viewed from the front.

10. The steam cleaning apparatus according to claim 1, wherein said steam cleaning head has a circular shape when viewed from the front.

11. The steam cleaning apparatus according to claim 1, further comprising a fresh-air distribution chamber, said fresh air distribution chamber communicating with the surroundings of said steam cleaning head, a plurality of holes connecting said fresh air distribution chamber with said suction regions at said front side.

12. The steam cleaning apparatus according to claim 11, wherein said fresh-air distribution chamber is arranged axially behind said suction regions at said front side.

13. The steam cleaning apparatus according to claim 1, wherein said steam cleaning head has a front circumference;

and further comprising a plurality of suction slits, said suction slits distributed over said steam cleaning head front circumference.

14. The steam cleaning apparatus according to claim 1, further comprising a wiper, said wiper secured to said steam cleaning head, said wiper during operation of said steam cleaning head resting on the flat surface.

15. The steam cleaning apparatus according to claim 1, wherein said steam pressure chambers generating steam pressure of about 4 bar.

16. The steam cleaning apparatus according to claim 1, wherein in operation said suction stations generating suction pressure of about 0.2 bar.

17. The steam cleaning apparatus according to claim 1, wherein a ratio of the surface area of said steam pressure chambers to the surface area of said suction regions is such that there remains a slight suction surplus.

18. The steam cleaning apparatus according to claim 1, further comprising a slide, rails, and a frame;

wherein said steam cleaning head held on said slide, said slide movable along said rails, and said rails mounted on said frame.

19. The steam cleaning apparatus according to claim 18, wherein said rails are arranged in a substantially horizontal direction and wherein said frame is vertically movable.

20. The steam cleaning apparatus according to claim 1, further comprising a robot, said robot moving said steam cleaning head over the flat surface.

21. A steam cleaning apparatus for automatic cleaning of window and facade surfaces, comprising a steam cleaning head, having a front side with a circumference, said head comprising:

a) a plurality of steam pressure chambers, each of said steam pressure chambers having a rear wall;

a steam nozzle extending through said rear wall, a short web extends from said rear wall and surrounding said steam pressure chambers, said webs terminating in a joint plane at the front side, said steam chambers for discharging steam at the head front side;

b) a steam distribution chamber arranged axially behind said steam pressure chambers, said distribution chamber operatively connected with said steam nozzles;

c) a steam generator, a pressure tube operatively connecting said steam generator with said steam distribution chamber;

d) a plurality of separate suction regions at the front side, a plurality of suction sleeves connecting said suction regions with a joint suction chamber in a rear portion of said steam cleaning head, a vacuum source operatively connected by a suction tube with said joint suction chamber, said suction regions for intaking steam along the head front side;

e) a fresh air distribution chamber arranged axially behind said suction regions at the front side;

said fresh air distribution chamber communicating with the surroundings of said steam cleaning head, a plurality of holes connecting said fresh air distribution chamber with said suction regions;

said fresh-air distribution chamber;

f) a plurality of suction slits distributed over the front circumference of said steam cleaning head, said slits communicating with said suction chamber;

g) a wiper secured to said steam cleaning head, said wiper resting on the surface to be cleaned during operation of said steam cleaning head;

h) said steam chambers generating steam pressure during operation of said cleaning head of about 4 bar, and said suction regions generating suction pressure of about 0.2 bar; and

wherein during operation of the said cleaning head steam flows across said webs of said steam pressure chambers into said suction regions so that a gap is formed between said steam cleaning head and the surface to be cleaned.

22. A steam cleaning apparatus according to claim 21, further comprising a slide movable along substantially horizontal rails, said rails mounted on a vertically movable frame, said steam cleaning head held on said slide;

and wherein said steam cleaning head is moved by means of a robot over the surface to be cleaned.