Wiper blade, in particular for a motor vehicle

A wiper blade (10) for a motor vehicle, the wiper blade coupled to a wiper arm (28) and comprising:

• an adapter (24) for coupling the wiper blade (10) to the wiper arm (28), wherein the adapter (24) includes a distribution element (34) having an inlet (36) to receive cleaning liquid and a supply channel (37) coupled to the inlet (36) for moving the cleaning liquid through the adapter (24), wherein the wiper blade (10) includes a first, distal spray bar (16) that is coupled to the adapter (24) and extends away from the adapter (24) in a first longitudinal direction for dispensing cleaning liquid out of an opening (32) along a distal portion of the wiper blade (10) that is spaced away from the adapter (24), and a second, proximal spray bar (18) that is coupled to the adapter (24) and extends from the adapter (24) in a second, opposite longitudinal direction for dispensing cleaning liquid out of an opening (32) along a proximal portion of the wiper blade (10) that is spaced away from the adapter (24), wherein the cleaning liquid is configured to first flow through the inlet (36) and into the supply channel (37) within the adapter (24) before then splitting such that a portion of the cleaning liquid passes to the first spray bar (16) and another portion of the cleaning liquid passes to the second spray bar (18), wherein the supply channel (37) within the adapter (24) comprises a first supply section (38) with a first passage configured for cleaning liquid to flow in the first longitudinal direction toward the first spray bar (16) and a second supply section (42) with a second passage configured for cleaning liquid to flow in the second longitudinal direction toward the second spray bar (18), and a narrowing is provided in the second passage of the second supply section (42) such that the second passage is narrower than the first passage, such that the cleaning liquid must pass through a narrower area moving along the second longitudinal direction than along the first longitudinal direction within the adapter (24), wherein the second spray bar (18) has an end that defines an inner circle (IK) when the wiper arm (28) is rotated about an axis, and wherein the first spray bar (16) has an end that defines a larger outer circle (AK) when the wiper arm (28) is rotated about the axis, wherein the narrowing is configured to reduce an amount of cleaning liquid passing through the opening (32) of the second spray bar (18) toward the inner circle (IK).