US 4,400,844 AGranted

Wiper device

AssigneesNissan Motor Co., Ltd., Jidosha Denki Kogyo Kabushiki Kaisha

InventorsNobuo Hayakawa, Yasuo Ohashi, Kenji Ohta, Yasumasa Takagi, Masami Gotoh

Life of this patent

Estimating the term…

Loading patent…

Abstract

A wiper device equipped with a rise up mechanism, including a motor, a blade, a wiper pivot, a motor arm which rotates in one direction during the starting and wiping operations of the blade and which rotates in a reverse direction during the parking and stopping operations of the blade, a connecting rod reciprocating in response to the rotation of the motor arm to swing the wiper pivot, a retainer for retaining the connecting rod, an eccentric member for rotating together with or relative to the retainer, a friction spring disposed between the eccentric member and the retainer for permitting the rotation of the eccentric member relative to the retainer only just after the starting of the blade or just before the parking and stopping of the blade, and a cam mechanism for rotating the eccentric member together with the retainer during all operations except the operation during which the eccentric member rotates relative to the retainer just after the starting of the blade or just before the parking and stopping thereof so as to change the effective length of the connecting rod to the eccentric degree of the eccentric member.

Claims10

Dependent claims

A wiper device equipped with a rise up mechanism, comprising:

a motor;
a wiper blade;
a wiper pivot connected to the wiper blade;
a motor arm which rotates in a first direction during starting and wiper operations of the blade and which rotates in a reverse direction during stopping and parking operations of the blade;
a connecting rod having one end connected to the wiper pivot and having another end connected eccentrically to the motor arm for reciprocating in response to the rotation of the motor arm to swing the wiper pivot;
a retainer for retaining the connecting rod on the motor arm;
an eccentric member arranged to be rotatable with or relative to the retainer;
a friction spring disposed between the eccentric member and the retainer to prevent rotation of the eccentric metal relative to the retainer;
and
a cam mechanism arranged to permit the eccentric member to rotate together with the retainer during the wiping operation and arranged to overcome the action of the friction spring and cause the eccentric member to rotate relative to the retainer just after the starting of the blade or just before the parking and stopping thereof and to change the effective length of the connecting rod to the eccentric degree of the eccentric member.

7 more elements

Dependencies are inferred from the claim text.