Suction device designed to suck air and liquid from a planar surface, and scraper blade for such a device

A suction device for sucking air and liquid from a planar surface, said suction device comprising:

• two blades, each blade being comprised of a flexible material, said two blades being made integral in order to form a single blade member moveable in one direction against said planar surface;
• a ridge formed by said two blades joining together at an angle;
• an internal cavity being between said two blades and having a shape resulting from angled positioning and from making said two blades integral;
• and
• means for carrying out suction of air and liquid connected to said internal cavity,
• wherein one blade of said two blades is oriented downward relative to the other blade of said two blades so as to be presented first to said planar surface during a scraping operation, said one blade having a plurality of holes along and close to said ridge, said holes being in fluid connection to said internal cavity.

A suction device for sucking air and liquid from a planar surface, said suction device comprising:

• a single blade, being comprised of a flexible material and moveable in one direction against said planar surface, the blade having a distal portion in contact with said planar surface during a scraping operation, the blade comprising:
• an internal cavity being positioned on said distal portion and being comprised of a contact wall and an upper wall, said upper wall being angled toward said contact wall;
• and
• means for carrying out suction of air and liquid connected to said internal cavity;
• a ridge between said contact wall and said upper wall and being moveable over said planar surface;
• a plurality of holes connected to said internal cavity and positioned on said contact wall, said ridge being between said holes and said upper wall, said holes being arranged along said ridge;
• and
• a flat strip on a free end of the blade, said flat strip at said distal portion of the blade, said contact wall having a set-back forming an angle with said flat strip, said set-back being extended by a portion of a wall sloping with respect to the blade, said plurality of holes being located in said portion of said wall.