Windshield cleaning system with easily replaceable nozzle and pipe

Windshield cleaning system comprising:

• a gear housing;
• a cover enclosing the gear housing and having an aperture for conducting a pipe through the cover;
• a wiper shaft projecting from the gear housing for driving a wiper arm in pendulum fashion, the wiper shaft including a bore;
• a pipe disposed in the bore to define a washing liquid channel having first and second ends;
• a hose connected to the pipe at the first end;
• a stationary holding and closing element for the aperture in the cover;
• first locking means adjacent the first end of the pipe for detachably fixing the pipe on the stationary holding element, said first locking means including the closing element having a bore to fittingly receive the pipe and a first locking recess formed in the area of the bore of the closing element and a first locking projection extending from a generated surface of the pipe engageable within the first locking recess;
• a nozzle body with a nozzle;
• second locking means for holding the nozzle body and nozzle on the second end of the pipe, the second locking means including a second locking recess and a second locking body engaging therein;
• and
• sealing means arranged between the nozzle body and the pipe independent of the second locking means for sealing the nozzle body with respect to the pipe.

A windshield cleaning system comprising:

• a gear housing;
• a cover enclosing the gear housing and having an aperture for conducting a pipe through the cover;
• a wiper shaft projecting from the gear housing for driving a wiper arm in pendulum fashion, the wiper shaft including a bore;
• a pipe disposed in the bore to define a washing liquid channel having first and second ends, the first and second pipe ends spaced from a free end of the wiper shaft, the pipe formed from plastic material in one piece with a pipe union;
• a hose connected to the pipe by the pipe union at the first end;
• a stationary holding and closing element for the aperture in the cover, the stationary holding and closing element for holding the pipe passing through the aperture in the cover, the stationary holding and closing element having a bore in order to fittingly receive the pipe, the stationary holding and closing element, at a front side facing the pipe union, including means for securing the pipe and the pipe union to the stationary holding and closing element in a manner protected against twisting, the securing means including a notch at a front side of the stationary holding and closing element and a fixing nose projecting from the pipe engageable within the notch;
• first locking means carried by the pipe in the vicinity of the pipe union for detachably fixing the pipe to the stationary holding and closing element, the first locking means including a first locking recess formed in the area of the bore, and a first locking projection extending from a generated surface of the pipe engageable within the first locking recess, the first locking projection arranged on the pipe in the vicinity of the first end;
• a nozzle body with a nozzle, the nozzle body projecting into the first end of the pipe with a pipe-shaped stud, the nozzle body held on the pipe in a manner protected against twisting, a free end of the pipe-shaped stud having an axial slot and a web projecting from the inner wall of the pipe axially aligned and engageable in the axial slot;
• second locking means holding the nozzle body and nozzle on the second end of the pipe, the second locking means including a second locking recess and a second locking body engaging therein, the second locking body formed with a crown on the pipe-shaped stud, and the corresponding second locking recess formed on the inner wall of the pipe, the second locking recess arranged on the pipe in the vicinity of second end;
• and
• sealing means arranged between the nozzle body and the pipe independent of the second locking means, the sealing means including a sealing bead projecting from the pipe-shaped stud on the nozzle body with a spacing from the second locking body to rest against the pipe with press fit, the sealing bead arranged between the second locking body and the free end of the pipe-shaped stud on the nozzle body.