Windshield wiper systems

A pantograph wiper system for a vehicle, comprising:

• a first pivot drive shaft
• a first wiper arm configured to be driven by the first pivot drive shaft;
• a second pivot drive shaft;
• a second wiper arm configured to be driven by the second pivot drive shaft;
• a wiper motor configured to drive rotation of the first and second pivot drive shafts;
• an idler pivot shaft coupled to one of the first or second pivot drive shafts;
• a wiper middle arm;
• a reciprocating crank and a reciprocating shaft configured to transmit rotational motion of the idler pivot shaft to the wiper middle arm;
• and
• an arm-blade coupler connecting the wiper middle arm to the first and second wiper arms, the arm-blade coupler being configured to allow the wiper middle arm to slide along the first and second wiper arms.

A wiper system comprising:

• a wiper motor;
• a first wiper arm and a second wiper arm configured to be driven by the wiper motor;
• a wiper middle arm;
• and
• an arm-blade coupler connecting the wiper middle arm to the first and second wiper arms, the arm-blade coupler being configured to allow the wiper middle arm to slide along the first and second wiper arms.

A method for wiping a windshield, comprising:

• providing at least one wiper blade supported by a first wiper arm and a second wiper arm;
• rotating at least the first wiper arm;
• and
• converting rotary motion to reciprocating motion of the second wiper arm.